JP5945201B2 - Rust prevention coating method, new installation method and renovation method of parking facilities - Google Patents

Description

This invention relates to a method anticorrosive painting relates to new methods and refurbishment how the parking, more particularly, corrosion resistance and safety hygiene coating film having excellent adhesion and also excellent drying properties while achieving environmental conservation and anti-rust coating method of the parking facilities that can be formed by coating with a high workability relates to new methods and refurbishment how.

  Conventionally, parking facilities such as multistory parking lots have been repaired and refurbished, and there has been rusting due to corrosion on the housing of the parking facilities, especially on the floor surface where automobile tires come into contact. In addition, mechanical oils and tire polish silicone compounds Has been finished with an organic solvent-based paint having excellent adhesion and film-forming properties. As a technique for repairing a parking facility with such an organic solvent-based paint, for example, Patent Document 1 is cited. Specifically, Patent Document 1 discloses a “rust prevention method for applying“ Sabitite (trade name, Daido Paint Co., Ltd.) ”, an epoxy resin-based anticorrosion paint containing an organic solvent, to a tire space steel floor. Are described (columns 0019 and 0020, etc.).

  In such organic solvent paints, aromatic solvents such as toluene, ester solvents such as butyl acetate, alcohol solvents such as butanol, ketone solvents such as methyl ethyl ketone, glycol ethers such as ethylene glycol monobutyl ether It contains a solvent, a cycloaliphatic hydrocarbon solvent such as cyclohexanone, and a mixture of aliphatic and aromatic hydrocarbons. Many of these organic solvents fall under the Occupational Safety and Health Act's organic solvent poisoning prevention regulations, and there are concerns about health hazards due to exposure to workers during construction. In addition, most organic solvents are volatile organic compounds that, after being released into the atmosphere, are subjected to the action of ultraviolet rays from sunlight together with nitrogen oxides to produce harmful photochemical oxidants, which are then granulated. Since it changes to suspended particulate matter, air pollution is a concern. Many parking facilities are installed in urban areas, and when organic solvent-based paints are applied for repairs and repairs, the irritating odors and odors of organic solvents are released to the surrounding area, and passersby and neighbors In addition, there is a concern that the appetite may be deteriorated in restaurants and the like. As described above, when using conventional organic solvent-based paints for parking facilities, there are issues to be solved in terms of safety and hygiene due to odors etc. generated during and after construction and environmental conservation due to organic solvents that volatilize during and after construction. there were.

  From another point of view, in some cases, parking facilities are installed in poorly ventilated areas in the city, so that drying (operating dry) paint and workability may be required.

JP 2001-259519 A

The present invention provides a rust-proof coating method, a new installation method, and a renovation of a parking facility capable of coating and forming a coating film excellent in corrosion resistance and adhesion with excellent drying and high workability while achieving safety and hygiene and environmental conservation. It aims to provide a method.

  As a result of various studies to solve the above problems, the inventors of the present invention have improved the composition of the organic solvent-based paint, or replaced the organic solvent-based paint with a solvent-free paint. Although the above problems could not be solved at once, replacing organic solvent-based paints with water-based anti-corrosion paints can greatly reduce the adverse effects on workers and neighboring residents, and is extremely useful and safe for preventing air pollution. It was found that a coating film excellent in corrosion resistance with excellent drying properties and high workability can be applied and formed on the housing, as well as solving the problems of hygiene and environmental conservation, and the above problems can be solved.

That is, as a first means for solving the above problems,
Claim 1 is a degreasing treatment using a porous body of melamine resin or a polishing process for polishing with a porous body of melamine resin before applying a water-based anticorrosive paint having excellent corrosion resistance to a housing of a parking facility and drying it. It is a rust-proof coating method for parking equipment, characterized by
According to a second aspect of the present invention, the water-based anticorrosive paint contains at least one resin selected from the group consisting of acrylic resins, urethane resins, epoxy resins, vinyl resins, and silicone resins and an antirust agent. It is a rust preventive coating method for parking equipment according to claim 1,
Claim 3 is the rust-proof coating method for parking equipment according to claim 1 or 2, wherein the water-based rust-proof paint is a one-component paint or a two-component paint.
4. A rust preventive for a parking facility according to any one of claims 1 to 3, wherein an overcoat water-based paint is applied on the water-based anticorrosive paint applied to the housing and dried. Painting method,
According to a fifth aspect of the present invention, the overcoating water-based paint comprises at least one resin selected from the group consisting of an acrylic resin, a urethane resin, an epoxy resin, a vinyl resin, a silicone resin, and a fluorine resin, and a pigment. It contains, It is a rust prevention coating method of the parking equipment of Claim 4 characterized by the above-mentioned.
6. The method according to claim 6, wherein before applying the water-based anticorrosive paint to the casing, the water-based zinc rich paint is applied and dried, and the fluororesin and the pigment are formed on the water-based anticorrosive paint applied to the casing. It is a rust preventive coating method for a parking facility according to claim 5, characterized in that the topcoat water-based paint containing
A seventh aspect of the present invention is the rust-proof coating method for a parking facility according to any one of claims 4 to 6, wherein the topcoat water-based paint is a one-component paint or a two-component paint.

In addition, as a second means for solving the above problem,
Claim 8 is characterized in that after assembling the casing, the water-based anticorrosive paint is applied to the casing and dried by the antirust coating method for a parking facility according to any one of claims 1 to 7. is a new way of parking facilities to be,
Claim 9 applies the water-based anti-corrosion paint to the frame of an existing parking facility according to any one of claims 1 to 7 and dries it, and then dries the parking facility. Renovation method,
10. The method for repairing a parking facility according to claim 9 , wherein the casing is pretreated (except for the degreasing treatment and the polishing treatment) before the application of the water-based anticorrosive paint . .

Since the rust-proof coating method for parking equipment according to this invention is characterized by applying and drying a water-based rust-proof paint that exhibits corrosion resistance on the housing of the parking equipment, the organic solvent to the worker during or after construction Safety and hygiene aspects and the environment can be reduced by significantly reducing exposure, without releasing irritating odors and odors of organic solvents in the surrounding environment, and by significantly reducing the release of volatile organic compounds to the atmosphere. Conservation can be realized. Moreover, since the antirust coating method for parking equipment according to the present invention is characterized in that the water-based anticorrosion paint is similarly applied and dried, a coating film excellent in corrosion resistance with excellent drying properties and high workability is provided as a casing. It can be applied and formed. Further, in the antirust coating method for parking equipment according to the present invention, before applying the water-based anticorrosive paint and drying, the degreasing treatment using the porous body of the melamine resin or the porous body of the melamine resin is polished. Since the polishing treatment is performed, it is possible to prevent the repelling phenomenon of the water-based anticorrosive paint applied to the surface of the housing and to form a highly adhesive coating on the surface of the housing. Therefore, according to the present invention, the anticorrosion coating method for a parking facility capable of coating and forming a coating film excellent in corrosion resistance and adhesion with excellent drying properties and high workability while achieving safety and hygiene and environmental conservation, New installation and renovation methods can be provided.

  The present invention is characterized in that a water-based anticorrosive paint exhibiting corrosion resistance is applied to a housing of a parking facility and dried. Here, the parking facility may be a facility for parking a car, and examples thereof include a multilevel parking lot, a flat parking lot, an underground parking lot, and a mechanical parking lot. In the present invention, the location where the water-based anticorrosive paint is applied (also referred to as a coating site) may be at least the floor surface in contact with the vehicle tire among the parking equipment housings, and the surface of other housings is also included. . In addition, in this invention, it is good to assemble the frame of a parking facility with the steel plate in which especially rust prevention is requested | required.

  Parking equipment housings, especially used parking equipment housings, are pre-treated before applying the water-based anti-corrosion paint described later, and the coating film formed by curing the water-based anti-corrosion paint is strong on the surface of the housing. It is preferable at the point which adheres to. As pre-treatment, degreasing treatment that removes the oil component adhering to the chassis surface or the silicone component of the tire polish with an aqueous cleaning agent, and the silicone of the tire polish with the surface layer of the old paint film are removed by polishing. Polishing treatment, removal treatment to remove fragile old paint film and corrosion products with rust and peeling with a power tool, etc., hand tool and power tool to remove a sound old paint film surface without rust and peeling. For example, sanding processing for sanding. In addition, when the old paint surface is in a healthy state, a water-based anticorrosive paint described later can be applied to the old paint surface.

  Here, the polishing process, the removal process, and the sanding process are sometimes referred to as a roughening process of the base because the purpose is to scratch the surface of the base by several μm. Each of these processes can be performed according to a regular method, and is usually performed when the parking facility is renovated, and may not be performed when a new facility is installed. In these treatments, the entire coating film is preferably removed when rusting and peeling occur.

Among such pre-treatments , at least a degreasing treatment using a melamine-based resin porous body and a polishing process for polishing with the melamine-based resin porous body are performed . When these degreasing treatments or polishing treatments are selected as pretreatment, even if a solvent is required, water is premised and no organic solvent is required, so high safety and hygiene and environmental conservation can be achieved. The effect of the water-based rust preventive paint can be made more effective. Moreover, when these degreasing treatments or polishing treatments are selected, in addition to mineral oils such as engine oils, it is possible to effectively remove silicone oil and the like that are usually difficult to remove, and water-based anticorrosion applied to the surface of the housing. A paint film having high adhesion can be formed on the surface of the housing by preventing the repelling phenomenon of the paint.

  The porous body of the melamine resin used in the degreasing process or the polishing process is formed in a porous structure with the melamine resin. The melamine resin is a resin obtained by condensation polymerization of a melamine compound and formaldehyde. For example, it is obtained by condensation polymerization of melamine resin, guanamine and formaldehyde obtained by condensation polymerization of melamine and formaldehyde. A melamine resin etc. are mentioned. Guanamine may have an alkyl group having 1 to 6 carbon atoms, an aromatic group which may have a substituent, or the like.

  The porous body has a three-dimensional network-like porous structure. Specifically, the porous structure has a network skeleton composed of fibers of a melamine resin, preferably a porous structure in which the fibers are sharp. have. With such a porous structure, silicone oil and the like attached to the surface of the housing can be effectively removed. The porous body having such a porous structure preferably has, for example, the following characteristics.

  The cross-sectional shape of the skeleton in the three-dimensional network-like porous structure is preferably a circle, an ellipse or a polygon, and particularly preferably an ellipse or a polygon. The thickness of the skeleton in the three-dimensional network porous structure is preferably 5 to 10 μm, and the pore diameter of the porous body is preferably 30 to 150 μm. The thickness of the skeleton can be measured from a photograph of the porous body observed with an electron microscope, and the pore diameter can be measured as a circle-equivalent diameter from a photograph of the porous body observed with an electron microscope.

The porosity of the porous body is preferably 0.1% or more, the density of the porous body is preferably 6 to 50 kg / m ³ , and the tensile strength of the porous body is 50 to 700 kPa. Preferably, the breaking elongation of the porous body is preferably 0.1 to 20 N / cm.

  As described above, when the porous body has at least one characteristic or physical property within the cross-sectional shape and / or the range, it is possible to effectively remove the silicone oil or the like adhering to the surface of the casing. Silicone oil and the like can be removed not only with a flat surface but also with a complicated shape by following the surface shape well. In addition, the surface of the housing can be roughened, and the coating film of the water-based anticorrosive paint can be adhered to the surface of the housing with high adhesion.

Such a porous body of melamine-based resin can also be manufactured under the following conditions, and is a commercially available product, for example, the trade name “Kakiki-kun” (manufactured by Lec Co., Ltd.), the trade name “Cleaning Eraser” (Azuma Industry Etc.) can also be used.
<Manufacturing method>
By heating methylolmelamine obtained by condensing a melamine compound and formaldehyde under alkaline conditions, a porous body of a melamine resin having a porous structure can be produced.

  The water-based anticorrosive paint is a paint excellent in corrosion resistance, and contains at least a resin, an antirust agent, water, and various additives as required, and forms a coating film that exhibits corrosion resistance and the like when cured.

  By the way, parking facilities such as a multi-story parking lot, especially the coating formed on the floor surface where the tires of an automobile come into pressure contact have not only corrosion resistance but also a particular problem in parking the automobile. For example, the coating film is formed on the surface of the casing of the parking facility with high adhesion and does not transfer to the tire, that is, the coating film has high adhesion to the casing. In addition, since parking facilities such as a multi-story parking lot are usually installed in an exposed state outdoors, the coating film is also required to have moisture resistance and weather resistance.

  In the water-based anticorrosive paint according to the present invention, the resin contained in the water-based anticorrosive paint is not particularly limited, but from the group consisting of acrylic resin, urethane resin, epoxy resin, vinyl resin and silicone resin. It preferably contains at least one selected resin. If the water-based anti-corrosion paint contains at least one of these resins, it can form a coating film that can solve the problems specific to parking facilities in addition to corrosion resistance. Appropriate resin is selected according to the problem specific to the parking facility. For example, when the coating film of the water-based anti-corrosion paint requires particularly high adhesion to the housing in addition to corrosion resistance, at least one kind of the resin is selected, and even higher adhesion to the housing in addition to corrosion resistance Epoxy resins are selected when the properties are particularly required, and urethane and silicone resins are selected from the above group when weather resistance and / or moisture resistance is particularly required in addition to the corrosion resistance.

  In the water-based anticorrosive paint according to the present invention, a plurality of these resins may be contained, and usually a high molecular weight emulsion type is preferable because it can be well dispersed in water and can form a tough coating film.

  The acrylic resin may be a resin having a (meth) acrylic monomer as a structural unit. For example, the structural monomer is preferably an alkyl ester of (meth) acrylic acid, and the alkyl group in this ester has 1 carbon atom. To 10 is preferable, and 1 to 8 is particularly preferable. Examples of such constituent monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, and n-butyl (meth) acrylate. , (Meth) acrylic acid i-butyl, (meth) acrylic acid t-butyl, (meth) acrylic acid hexyl, (meth) acrylic acid 2-ethylhexyl, and the like. Various modified resins can be used as the acrylic resin. The acrylic resin is preferably an acrylic emulsion because of its excellent dispersibility in water.

  The urethane-based resin may be a resin having polyol and polyisocyanate as structural units. For example, the polyol only needs to contain at least one of polyester polyol, polyether polyol, polycarbonate polyol, etc., and the polyisocyanate is preferably an aliphatic polyisocyanate, such as hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, It contains at least one of hydrogenated tolylene diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated methylene diphenyl diisocyanate and the like. Various modified resins can be used as the urethane resin. This urethane resin is preferably a urethane emulsion because of its excellent dispersibility in water.

  The epoxy resin may be a resin having an epoxy compound as a structural unit. For example, a resin obtained by reacting glycidyl ethers with at least one of bisphenol A, bisphenol F, bisphenol AD, bisphenol Z and the like as a constituent monomer. preferable. Various modified resins can be used as the epoxy resin. It is preferable to use an epoxy emulsion because this epoxy resin is excellent in water dispersibility.

  The vinyl resin only needs to be a resin having a structural unit of a compound having a carbon-carbon unsaturated bond (excluding (meth) acrylic compounds such as (meth) acrylic monomers). It contains at least one of vinyl, vinyl acetate, styrene, acrylonitrile and the like. Various modified resins can be used as the vinyl resin. The vinyl resin is preferably a vinyl emulsion because of its excellent dispersibility in water.

  Examples of the silicone resin include a partially hydrolyzed condensate of alkyl silicate or a modified product thereof.

As such a partial hydrolysis-condensation product, for example, the general formula R ¹ nSi (OR ² ) _4-n
[Wherein, R ¹ is an organic group having 1 to 8 carbon atoms, R ² is an alkyl group having 1 to 5 carbon atoms, and n is 0 or 1. Preferred examples thereof include hydrolysis condensates of alkyl silicates represented by the following formula: In the above formula, examples of the organic group as R ¹ include an alkyl group, a cycloalkyl group, an aryl group, and a vinyl group. Here, the alkyl group may be linear or branched. Examples of the alkyl group include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, s-butyl group, t-butyl group, pentyl group, hexyl group, heptyl. And alkyl groups such as an octyl group. Preferred alkyl groups are those having 1 to 4 carbon atoms. Preferred examples of the cycloalkyl group include a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, and the like. Examples of the aryl group include a phenyl group and a naphthyl group. Each of the above functional groups may optionally have a substituent. Examples of such substituents include halogen atoms (eg, chlorine atoms, bromine atoms, fluorine atoms, etc.), (meth) acryloyl groups, amino groups, mercapto groups, glycidoxy groups, epoxy groups, alicyclic groups, and the like. Can be mentioned. The alkyl group as R ² may be linear or branched. Examples of such an alkyl group include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, an s-butyl group, a t-butyl group, and a pentyl group. Preferred alkyl groups are those having 1 to 2 carbon atoms.

  Specific examples of such alkyl silicates include alkyl silicates where n is 0, such as tetramethyl silicate, tetraethyl silicate, tetra-n-propyl silicate, tetra-i-propyl silicate, tetra-n-butyl silicate; Trimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, i-propyltrimethoxysilane, i-propyltriethoxysilane, γ-glycine Sidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropyltriethoxysilane, γ-mercaptopropyltrime Toxisilane, γ-mercaptopropyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, γ-aminopropyltrimethoxysilane, 3,4-epoxycyclohexylethyltrimethoxysilane, 3,4-epoxycyclohexylethyltriethoxysilane, etc. And alkyl silicate when n is 1. You may use these individually or in combination of 2 or more types. Various modified resins can be used as the silicone resin. The silicone resin is preferably a silicone emulsion because of its excellent dispersibility in water.

  These resins are preferably contained in an amount of 1 to 80% by mass, particularly preferably 5 to 60% by mass, based on the total mass of the water-based anticorrosive paint.

  The water-based rust preventive paint contains a rust preventive agent in addition to the resin. Examples of the rust preventive include zinc oxide, zinc phosphate, calcium phosphate, aluminum phosphate (including condensed aluminum phosphate), Hisago, and aluminum molybdate. These rust preventives are preferably contained in an amount of 1 to 60% by mass, particularly preferably 5 to 40% by mass, based on the total mass of the water-based anticorrosive paint.

  In addition to the above components, the water-based anticorrosive paint contains additives such as a curing agent, a pigment, a solvent, a dispersant, an anti-settling agent, an anti-sagging agent, an antifoaming agent, a leveling agent, an antifungal agent, and an antibacterial agent. be able to. Examples of the pigment include coloring pigments and extender pigments. The solvent may be an organic solvent as long as it does not cause a problem such as odor. However, it is preferable that the solvent does not contain an organic solvent because the object of the present invention can be achieved well. As the curing agent, an appropriate compound is selected according to the type of resin contained in the water-based anticorrosive paint. Dispersing agents, anti-settling agents, anti-sagging agents, antifoaming agents, leveling agents, anti-fungal agents, antibacterial agents, and the like include various compounds that are usually used in water-based paints, and the content thereof does not impair the purpose of the present invention. Is set appropriately.

  The aqueous rust preventive paint containing the resin, the rust preventive agent, water and optionally various additives preferably has a solid content concentration of 5 to 90% by mass, particularly preferably 10 to 70% by mass. When the solid content concentration is within the above range, a sufficient physical strength can be obtained when a coating film is formed.

  The water-based anticorrosive paint may be a one-component paint containing all of the above components or a two-component paint. In the case of a two-pack type paint, the first liquid as the main ingredient component containing the resin and the second liquid containing the curing agent component are configured to include all of the components in the two liquids as a whole. The Two-component paints are mixed before using these two components.

  In the present invention, the water-based anticorrosive paint is applied to a housing of a parking facility and dried. In this invention, first, a water-based rust preventive paint is prepared. In particular, when the water-based anticorrosive paint is a two-pack type paint, the two liquids are mixed to obtain a paint. In this invention, next, the above-described pre-treatment of the casing is performed before applying the water-based anti-corrosion paint, if desired. When the preparation of the water-based anticorrosive paint and the pretreatment of the housing are completed in this way, the water-based anticorrosive paint is applied to the housing. The application of the water-based anticorrosive paint to the housing can adopt normal application means, and specifically, means such as brushes, air sprays, airless sprays, rollers, etc. can be applied. Is common. The water-based anticorrosive paint may be applied, for example, so that the dry film thickness is 10 to 500 μm, and may be applied once, or may be applied multiple times, for example, 2 to 4 times. When water-based anticorrosive paint is applied multiple times, the coating film exhibits good durability. At this time, the water-based anticorrosive paint to be applied over the already applied water-based anticorrosive paint may be applied in a state where the water-based anticorrosive paint already applied is cured, or may be applied in an uncured wet state. .

  In this invention, after applying the water-based anticorrosive paint, the water-based anticorrosive paint is dried. The water-based anticorrosive paint may be dried under conditions where water or water and the solvent contained in the water-based anticorrosive paint volatilize. For example, the water-based anticorrosive paint is left at room temperature of about 20 to 25 ° C. for 1 to 48 hours.

  In this way, water or water and the solvent of the water-based anticorrosive paint are volatilized and a coating film is formed on the surface of the casing. The formed coating film has excellent corrosion resistance, and has at least one characteristic of high adhesion to the housing, moisture resistance and weather resistance in addition to corrosion resistance depending on the resin contained in the water-based anticorrosive paint. doing. Therefore, according to the present invention, a coating film excellent in adhesion to the housing, moisture resistance and / or weather resistance in addition to corrosion resistance, in addition to corrosion resistance, has excellent drying properties while achieving safety and hygiene and environmental protection. And it can be applied and formed with high workability. According to this invention, by applying a water-based anticorrosive paint to the housing of the parking facility and drying it, the parking facility can be newly installed when the housing of the parking facility is unused, that is, newly assembled. Parking facilities can be refurbished if already in use.

  In the present invention, if desired, the overcoat water-based paint is applied to the coating film of the water-based anticorrosive paint and dried. This top-coat water-based paint is a top-coat water-based paint that reinforces the characteristics of water-based anti-corrosion paints, or a top-coat water-based paint that exhibits characteristics that water-based anti-corrosion paints cannot exhibit. Acrylic resins, urethane resins, epoxy-based paints It contains at least one resin selected from the group consisting of a resin, a vinyl resin, a silicone resin, and a fluorine resin and a pigment. If necessary, this overcoating water-based paint may be a known additive that exhibits the above-mentioned properties separately from the pigment, for example, a rust inhibitor for exhibiting corrosion resistance, a resin for exhibiting weather resistance (the water-based anti-corrosion agent according to the present invention). The resin contained in the rust paint may be excluded. This topcoat water-based paint is distinguished from a water-based anticorrosive paint in that it contains a pigment, and in some cases, it is distinguished from a water-based anticorrosive paint in that it does not contain a rust inhibitor.

  The resin contained in the overcoat paint may be at least one resin selected from the group consisting of an acrylic resin, a urethane resin, an epoxy resin, a vinyl resin, a silicone resin, and a fluorine resin, Each of the acrylic resin, urethane resin, epoxy resin, vinyl resin and silicone resin is basically the same as each resin contained in the water-based anticorrosive paint.

  The fluororesin is a resin obtained by polymerizing an olefin containing a fluorine atom. For example, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), perfluoroalkoxy fluororesin ( PFA), tetrafluoroethylene / hexafluoropropylene copolymer (FEP), ethylene / tetrafluoroethylene copolymer (ETFE), and the like.

  As described above, an appropriate resin is selected as the resin contained in the overcoat water-based paint depending on the desired characteristics. For example, an epoxy resin is selected when higher adhesion is particularly required by the coating film of the overcoat water-based paint, and similarly, urethane-based resin is selected from the above group when weather resistance and / or moisture resistance is particularly required. Alternatively, a silicone-based resin is selected, and similarly, a fluorine-based resin is selected from the above group when weather resistance and / or contamination resistance is particularly required. In particular, when an epoxy resin is selected as the resin for the water-based anticorrosive paint, urethane resin, acrylic resin or fluorine resin is preferably selected as the resin for the topcoat water-based paint, and acrylic resin is used as the resin for the water-based anticorrosive paint. When a vinyl resin is selected, a urethane or silicone resin is preferably selected as the resin for the top coat.

  These resins are preferably contained in an amount of 1 to 80% by mass, particularly preferably 5 to 60% by mass, based on the total mass of the overcoating water-based paint.

  As the pigment contained in the overcoat paint, known pigments used in various paints can be used without particular limitation, and examples thereof include titanium oxide, yellow iron oxide, and carbon black. The pigment only needs to be contained in a content generally applied to various paints. For example, the pigment is preferably contained in an amount of more than 0 parts by mass and 50% by mass or less based on the total mass of the overcoat water-based paint. The content of 10 to 30% by mass is particularly preferable.

  This top-coat water-based paint can also be referred to as a finish water-based paint, and is preferably applied and dried on a coating film formed by drying the water-based rust-proof paint basically in the same manner as the water-based rust-proof paint. This topcoat water-based paint may be a one-component paint containing all of the above components or a two-component paint. In the case of a two-pack type paint, the first liquid as the main ingredient component containing the resin and the second liquid containing the curing agent component are configured to include all of the components in the two liquids as a whole. The Two-component paints are mixed before using these two components.

  In this way, the finished coating film is formed on the surface of the coating film formed by evaporating water or water and the solvent of the top coating water-based paint and drying the water-based anticorrosive paint. The formed finished coating film has at least one characteristic such as adhesion to the coating film of the water-based anticorrosive paint, moisture resistance, weather resistance, and corrosion resistance. Therefore, according to the present invention, a coating film excellent in adhesion, moisture resistance and / or weather resistance in addition to corrosion resistance in a parking facility has excellent drying properties and high work while achieving safety and hygiene and environmental protection. It can be formed by coating. According to the present invention, by sequentially applying the water-based anti-corrosion paint and the overcoat water-based paint to the housing of the parking facility and drying, the parking facility can be newly installed when the housing of the parking facility is unused, that is, newly assembled, Parking facilities can be refurbished if the parking facilities are already in use.

  In the present invention, the aqueous zinc rich paint is applied and dried under the coating film of the aqueous anticorrosive paint, in other words, before applying the aqueous anticorrosive paint, if desired. This water-based zinc-rich paint may be any paint that normally contains metal zinc powder or zinc alloy powder in an amount of 60 to 95% by mass, and contains a water-soluble or water-dispersible binder, other additives, and water. Yes. The binder may be water-soluble or water-dispersible. For example, an epoxy resin, an amide resin, an amine resin, a urethane resin, an alkyd resin, a fluorine resin organic binder, an alkyl resin, Inorganic binders such as silicate, ethyl silicate, butyl silicate and the like can be mentioned. The content of the binder is preferably small, for example, 1 to 30% by mass. Examples of other additives include extender pigments, color pigments, anti-sagging agents, anti-coloring agents, dispersants, suspending agents, and antifoaming agents used in ordinary zinc-rich paints. These contents should be small, for example, 0 to 10% by mass. An example of such a water-based zinc rich paint is, for example, “zinc rich paint using a water-based urethane resin containing a carboxy group as a binder” described in Japanese Patent Application Laid-Open No. 07-133442.

  This water-based zinc-rich paint is applied and dried in the same manner as the water-based anticorrosive paint, after being pretreated if necessary, and before the water-based anticorrosive paint is applied to the housing of the parking facility.

  Thus, the water-based zinc rich paint water or water and the solvent are volatilized to form a coating film formed by drying the water-based zinc rich paint. Since the coating film of the water-based zinc rich paint contains metallic zinc powder or zinc alloy powder, the anticorrosive effect of the water-based anticorrosive paint on the housing of the parking facility can be reinforced. In particular, applying a water-based zinc-rich paint, a water-based anti-corrosion paint, and a top-coat water-based paint containing a fluororesin in this order to the parking equipment housing will exhibit the anticorrosion effect on the parking equipment housing for a longer period of time. Can be made. Further, since this water-based zinc rich paint contains water and does not substantially contain an organic solvent, it does not impair the safety and hygiene and environmental conservation due to the water-based anticorrosive paint. Therefore, according to this invention, in addition to adhesion to the housing, moisture resistance and / or weather resistance, a coating film excellent in corrosion resistance that is exhibited for a longer period of time is provided on the parking facility for safety and hygiene and environmental conservation. While achieving, it can be applied and formed with excellent drying properties and high workability. According to the present invention, the water-based zinc rich paint, the water-based anticorrosive paint, and the top-coat water-based paint are sequentially applied to the housing of the parking facility and dried, so that the parking facility housing is parked when it is unused, that is, newly assembled. New facilities can be installed, and parking facilities can be refurbished if parking facilities are already in use.

  Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples. The following examples show examples of the present invention, and the present invention is not limited to the following examples. In the examples, “parts” and “%” are based on mass unless otherwise specified.

( Reference Example 1)
<Test plate production method>
A two-component water-based epoxy resin paint having the following composition as a water-based anti-corrosion paint is applied to a sandblast plate (150 mm × 70 mm × t 3.2 mm, mild steel plate) once so that the dry film thickness is about 50 μm. It was dried for 24 hours in a constant temperature room maintained at a temperature of 23 ° C.
<Two-component water-based epoxy resin paint>
First liquid: Trade name “Epicoat 828” (manufactured by Japan Epoxy Resin Co., Ltd.), rust preventive component “calcium phosphate”, solvent “water”, resin concentration 30 mass%, solid content concentration 60 mass%
Second liquid: Trade name “modified polyamine resin FXI-919” (manufactured by Fuji Kasei Kogyo Co., Ltd.), solvent “water”, solid content concentration 50 mass%, mixing ratio with first liquid (mass ratio) first liquid: first Two liquids = 3: 1

A two-component water-based polyurethane resin paint having the following composition is applied as a top-coat water-based paint on the coating film of the water-based anticorrosive paint formed in this manner twice so that the dry film thickness is about 30 μm. It was dried for 48 hours in a thermostatic chamber kept at 23 ° C. In this way, a test plate of Reference Example 1 in which a coating film of an aqueous rust-proof coating material containing an epoxy-based resin and a coating film of a top-coating water-based coating material containing a polyurethane resin was formed in this order on a sandblast plate.
<Two-component water-based polyurethane resin paint>
First liquid: “Homemade acrylic polyol resin” (manufactured by Dainippon Paint Co., Ltd.), solvent “water”, pigment “titanium oxide”, resin concentration 30 mass%, solid content concentration 50 mass%
Second liquid: “Isophorone diisocyanate”, solid content concentration 100% by mass, mixing ratio with first liquid (mass ratio) First liquid: second liquid = 4: 1

(Comparative Example 1)
The two-component water-based epoxy resin paint is changed to a two-component organic solvent-based epoxy resin paint having the following composition as an organic solvent-based anticorrosive paint, and the two-component water-based polyurethane resin paint having the above composition is used as an overcoat organic solvent-based paint. A test plate of Comparative Example 1 was prepared basically in the same manner as in Reference Example 1 except that was changed to a two-component organic solvent-based polyurethane resin-based paint having the following composition.
<Two-pack type organic solvent epoxy resin paint>
First liquid: Trade name “Epicoat 1001” (manufactured by Japan Epoxy Resin Co., Ltd.), rust preventive ingredient “calcium phosphate”, organic solvent “toluene”, resin concentration 30% by mass, solid content concentration 60% by mass.
Second liquid: trade name “polyamideamine TXK-659” (manufactured by Fuji Kasei Kogyo Co., Ltd.), organic solvent “xylene”, solid content concentration 60 mass%, mixing ratio with first liquid (mass ratio) first liquid: first Two liquids = 4: 1
<Two-pack type organic solvent-based polyurethane resin-based paint>
First liquid: “Homemade epoxy polyol resin” (Dainippon Paint Co., Ltd.), organic solvent “toluene”, pigment “titanium oxide”, resin concentration 30% by mass, solid content concentration 50% by mass
Second liquid: “tolylene diisocyanate”, solid content concentration of 100 mass%, mixing ratio with first liquid (mass ratio) first liquid: second liquid = 4: 1

(Corrosion resistance test)
Each of the prepared test plates of Reference Example 1 and Comparative Example 1 was subjected to JIS K 5600-7-1 (Paint General Test Method-Part 7: Long-term Durability of Coating Film-Section 1: Neutral Salt Water Spray Resistance). 700 hours. The results are shown in Table 1 below.

As shown in Table 1, the test plate of Reference Example 1 having a finished coating film formed by applying and drying a two-component water-based polyurethane resin paint not containing a rust inhibitor was excellent in corrosion resistance. Even with a test plate having no coating film, that is, a test plate having a coating formed by applying and drying a two-component water-based epoxy resin coating, which is a water-based anti-corrosion coating, on a sandblast plate, it has excellent corrosion resistance as in Reference Example 1. Can understand.

(Adhesion test)
Each of the prepared test plates of Reference Example 1 and Comparative Example 1 was immersed in tap water for 24 hours, then removed from the tap water and allowed to stand for 1 hour, and then JIS K 5600-5-6 (Paint General Test Method No. 5). Part: Mechanical properties of coating film-Section 6: Adhesion (cross-cut method)) and evaluated. The results are shown in Table 2 below. The present applicants have confirmed that this adhesion test can be substituted for the evaluation of the adhesion of the coating film to the housing.

(Moisture resistance)
The test pieces of Reference Example 1 and Comparative Example 1 produced as described above were left in a constant temperature and humidity chamber of 98% RH or higher at 50 ° C. for 120 hours, and then evaluated in the same manner as in the cross-cut method test. The results are shown in Table 3 below.

(Weatherability)
The specimens of Reference Example 1 and Comparative Example 1 produced as described above were subjected to an accelerated weather resistance test using a sunshine weatherometer, and the change in coating film appearance after 1000 hours was compared with the coating film state before the test and evaluated. . The results are shown in Table 3 below.

In Reference Example 1, “adhesion to the housing” evaluation and “safety and health aspect and environmental conservation” evaluation different from the adhesion test were evaluated in Reference Examples 3 and 4 to be described later, and the effects were confirmed. .

( Reference Example 2)
In the renovation work of the turntable (outdoor installation, steel) which is one of the parking facilities, the water-based anticorrosive paint of the present invention was applied. Specifically, as a base preparation, oil such as engine oil was degreased with an aqueous cleaning agent (containing a surfactant component), and fragile old paint films and corrosion products were removed with a power tool. The surface of the old paint film was sanded with a hand tool or power tool to ensure the adhesion of the water-based anti-corrosion paint. After the base preparation was completed, a one-component water-based epoxy resin-based paint having the following composition was applied as a water-based anticorrosive paint at a time so as to have a dry film thickness of 30 μm and left for one day.
<One-component water-based epoxy resin-based paint>
Resin “Watersol” (manufactured by DIC), anticorrosive pigment “calcium phosphate”, solvent “water”, resin concentration 30% by mass, solid content concentration 60% by mass

On the coating film of the water-based anticorrosive paint thus formed, a one-component water-based acrylic resin-based paint having the following composition is applied twice as a top coat water-based paint so that the dry film thickness is 30 μm. Renovation completed.
<One-component water-based acrylic resin-based paint>
Product name “homemade acrylic emulsion” (Dainippon Paint Co., Ltd.), pigment “titanium oxide”, weathering additive “ultraviolet absorber”, solvent “water”, resin concentration 30% by mass, solid content concentration 55% by mass

(Peeling resistance and wear resistance by tire)
The degree of peeling and abrasion due to vehicle tires in the coating film of the turntable was compared with the portion where the organic solvent-based paint of Comparative Example 1 was applied, and the appearance of the coating film was visually evaluated as follows. This evaluation was conducted about half a year after the use of the refurbished turntable. The results are shown in Table 4 below.

From this result, it was found that the coating film obtained by curing the water-based anticorrosive paint of the present invention has high adhesion to the casing. Moreover, since the water-based anticorrosive paint of Reference Example 2 forms a tough emulsion coating film, it seems that the wear state by the vehicle tire was less than that of the organic solvent-based paint film of Comparative Example 1.

It was also Reference Example 1 is basically similar to to confirmed the same tendency as the test piece of Reference Example 1 was evaluated for moisture resistance and weather resistance for Reference Example 2.

( Reference Example 3)
In the repair work of the pallet (made of steel) of the multistage parking facility (outdoor installation) which is one of the mechanical parking facilities, the water-based anticorrosive paint of the present invention was applied. Specifically, after preparing the base of the pallet in the same manner as in Reference Example 2, the same two-component water-based epoxy resin paint as in Reference Example 1 above is applied once as a water-based anti-corrosion paint so that the dry film thickness is about 50 μm. And left for a day.

The same two-component water-based polyurethane resin paint as that in Reference Example 1 was applied twice on the coating film of the water-based anticorrosive paint formed in this way so as to have a dry film thickness of 30 μm. The multistage parking facility was renovated by drying at 25 ° C.

(Comparative Example 2)
After preparing the base of the pallet in the same manner as in Reference Example 2, a one-component moisture-curable polyurethane resin-based paint having the following composition as an organic solvent-based rust-proof coating was applied once to a dry film thickness of about 50 μm. I left it for a day.
<One-component moisture-curable polyurethane resin-based paint>
Product name “Sumijoule” (manufactured by Sumitomo Bayer Urethane Co., Ltd.), anticorrosive pigment “zinc powder”, organic solvent “xylene”, resin concentration 30% by mass, solid content concentration 55% by mass

A two-component polyurethane resin-based paint having the following composition was applied as an overcoat organic solvent-based paint on the water-based anti-corrosive paint film formed in this manner twice so that the dry film thickness was 30 μm. It was dried at ℃ and the multistage parking facility was renovated.
<Two-component polyurethane resin paint>
First liquid: “Homemade polyester polyol resin” (manufactured by Dainippon Paint Co., Ltd.), organic solvent “toluene”, pigment “titanium oxide”, resin concentration 30 mass%, solid content concentration 55 mass%
Second liquid: “Isophorone diisocyanate”, solid content concentration 100% by mass, mixing ratio with first liquid (mass ratio) First liquid: second liquid = 4: 1

(Odor measurement)
In the multistage parking facility thus modified, the odor of the atmosphere during the coating of the water-based anticorrosive paint of Reference Example 3 and the organic solvent-based anticorrosive paint of Comparative Example 2 was measured. The device used was a portable odor sensor made by Shin Cosmos Electric. This device can digitally display the odor intensity. Thereby, it is possible to grasp the degree of emission of volatile organic compounds. The measurement results are shown in Table 5 below. Although it depends on the kind of odor component, if the measured value is about 500 or less in the case of a normal organic solvent, sufficient consideration can be given to health and safety and environmental protection even in an urban area.

( Reference Example 4)
In the renovation work of the underground parking facility (indoor installation, made of steel) which is one of the mechanical parking facilities, the paint was repainted with the water-based paint of the present invention. Specifically, comprising the above Reference Example 1 and the same two-aqueous epoxy resin paint as an aqueous anticorrosive paint after the floor of the underground parking in the same manner as in Reference Example 2 was base adjustment to a dry film thickness of about 50μm I painted it at once and left it for a day.

The same two-component water-based polyurethane resin paint as that in Reference Example 1 was applied twice on the coating film of the water-based anticorrosive paint formed in this way so as to have a dry film thickness of 30 μm. Drying at 25 ° C completed the renovation of the underground parking facility.

(Odor sensory evaluation)
Sensory evaluation was carried out for the two-component water-based epoxy resin paint and the two-component water-based polyurethane resin paint in the atmosphere during the application of the water-based anticorrosive paint and the top-coat water-based paint of Reference Example 4. The evaluators were conducted by a total of five people: one painter, three parking equipment manufacturers, and one paint manufacturer sales representative. The results are shown in Tables 6 and 7 below.

(Evaluation of adhesion to the housing)
Table 8 below shows the results of confirming the state of each parking facility refurbished in Reference Examples 2 to 4 and Comparative Example 2 about six months after the start of use.

  As described above, most parking facilities are located in urban areas, and conventional organic solvent-based paints have problems of irritating odors and odors, and there are some facilities that cannot be renovated. They are severely aging, corroded, and even missing steel plates. The beauty is also bad. On the other hand, according to the present invention, by applying the water-based anticorrosive paint, the method of the present invention is considered in terms of health and safety and environmental protection without giving off an irritating odor or a strange odor during and after painting. It is a surface treatment method capable of imparting high corrosion resistance.

( Reference Example 5)

A one-component water-based zinc-rich paint having the following composition is applied to a sandblast plate (150 mm x 70 mm x t3.2 mm, mild steel plate) at a time so that the dry film thickness is about 50 µm. It was dried for 24 hours in a constant temperature chamber.
<Water-based zinc rich paint>
Product name "Aqueous Zettall EP-2 HB" (Dainippon Paint Co., Ltd.), Zinc powder component "Zinc", Binder "Polyamideamine", Solvent "Water", Antifoam (San Nopco Co., Ltd.), Zinc powder Concentration 75% by mass, binder concentration 25% by mass, solid content concentration 85% by mass

On the coating film of the water-based zinc rich paint thus formed, a two-component water-based epoxy resin paint having the following composition as a water-based anti-corrosion paint is applied once so that the dry film thickness is about 50 μm. It was dried for 24 hours in a constant temperature room maintained at a temperature of 23 ° C.
<Two-component water-based epoxy resin paint>
First liquid: Trade name “Epicoat 828” (manufactured by Japan Epoxy Resin Co., Ltd.), rust preventive component “calcium phosphate”, solvent “water”, resin concentration 30 mass%, solid content concentration 60 mass%
Second liquid: Trade name “modified polyamine resin FXI-919” (manufactured by Fuji Kasei Kogyo Co., Ltd.), solvent “water”, solid content concentration 50 mass%, mixing ratio with first liquid (mass ratio) first liquid: first Two liquids = 3: 1

On the water-based anti-corrosive paint film thus formed, a one-component water-based fluororesin paint having the following composition was applied twice as a top-coat water-based paint so that the dry film thickness was about 30 μm. It was dried for 48 hours in a thermostatic chamber kept at 23 ° C. Thus, a water-based zinc-rich paint film containing zinc dust, a water-based anticorrosive paint film containing an epoxy resin, and a paint film of a topcoat water-based paint containing a fluororesin in this order on the sandblast plate. The formed test plate of Reference Example 5 was produced.
<One-component water-based fluoropolymer paint>
Product name “DNT View Fluoro” (Dainippon Paint Co., Ltd.), fluororesin “Lumiflon” (Asahi Glass Co., Ltd.), solvent “water”, pigment “titanium oxide etc.”, fluororesin concentration 5 mass%, solid content concentration 12 mass%

(Corrosion resistance test)
Each of the prepared reference example 5 and the test plate of reference example 1 as a comparative object was subjected to JIS K 5600-7-1 (General coating test method—Part 7: Long-term durability of the coating film—Section 1: Medium-resistant salt spray) For 700 hours. As a result, the test plate of Reference Example 1 was not blistered, peeled off, or cracked even after 700 hours, as described above, whereas the test plate of Reference Example 5 was 900 hours, which was longer. Even after the passage, blistering, peeling, and me were not recognized. In this way, when a water-based zinc rich paint film is formed in the lower layer of the water-based anti-corrosion paint, and a water-based fluororesin paint film is formed in the upper layer of the water-based anti-corrosion paint, excellent corrosion resistance due to the water-based anti-corrosion paint is obtained. It can be understood that it can be exhibited for a longer period of time.

(Example 6)
The surface of a sandblast plate (150 mm × 70 mm × t3.2 mm, mild steel plate) is polished with polishing paper P280, and then silicone grease (trade name “silicone grease”, manufactured by Takenaka Engineering Co., Ltd.) is applied to a thickness of about 2 μm. A specimen was produced that far exceeded the amount of silicone compound deposited by normal use of parking facilities.

A porous body of melamine resin (trade name “Cleaning Eraser”, manufactured by Azuma Kogyo Co., Ltd.) was moistened with water on the surface of the specimen, and then slid in the manner of a rag and degreased. Thereafter, a one-component water-based polyurethane resin paint having the following composition as a water-based anticorrosive paint was applied to the surface of the subject at a time so that the dry film thickness was about 25 μm, and the temperature was maintained at 23 ° C. after coating. It was dried in a thermostatic chamber for 24 hours.
<One-part water-based polyurethane paint>
Product name “DNT View Urethane”, manufactured by Dainippon Paint Co., Ltd., one-component reaction-curable water-based paint, rust preventive agent “condensed aluminum phosphate” (manufactured by Teika Co., Ltd.), solvent “water”, resin concentration 30% by mass, Solid content concentration 35% by mass

  In this way, a test plate of Example 6 was prepared by forming a coating film of a one-component water-based polyurethane resin paint, which is a water-based anti-corrosion paint, on the surface of the subject.

(Comparative Example 3)
Instead of degreasing treatment with a porous melamine-based resin, the surface of the specimen prepared in Example 6 was washed with an aqueous cleaning agent (trade name “Granda Cleaner 312” 5% dilution, manufactured by Million Chemical Co., Ltd.). A test plate of Comparative Example 3 was produced basically in the same manner as in Example 6 except that the degreasing treatment was performed under the conditions of “Cement of steel surface preparation C type” described in “Public Building Construction Standard Specification”. .

(Peel test)
A test plate of Example 6 and Comparative Example 3 was prepared, and a crosscut reaching the substrate with a cutter knife after 3 days had passed, and after the cellophane tape (registered trademark) was adhered to the crosscut part, it was peeled off, It was confirmed whether or not the coating film of the one-component water-based polyurethane resin paint was peeled off from the specimen. As a result, in a severe test using a specimen far exceeding the amount of silicone compound deposited due to normal use of the parking facility, in Comparative Example 3, most of the coating film of the crosscut part was peeled off, but in Example 6, the cross-section was crossed. The cut film was not peeled off. In Comparative Example 3, as described above, the adhesion of the coating film is excellent unless it is a severe test.

  By the way, in Example 6, when the porous body of the melamine resin was not wetted with water, it was possible to confirm very slight peeling that would not cause a problem in practice, and the surface of the specimen prepared in Example 6 was confirmed. It was confirmed that the entire cross-cut portion was peeled off when the one-component water-based polyurethane resin paint was applied without any treatment.

The test plate of Example 6 was excellent in corrosion resistance as in Reference Example 1 and the like.

(Example 7)
A porous melamine resin (product) on the surface of a pallet to which a large amount of silicone compound is adhered in the repair work of a pallet (made of steel) of a multi-level parking facility (outdoor installation) which is an existing mechanical parking facility The pallet surface was degreased by slid the name “Gekiki-kun” (manufactured by Lek Co., Ltd.) as it was or after being dampened in water and sliding it with a rag. Thereafter, the same one-component water-based polyurethane resin paint as in Example 6 was applied to the surface of the subject at a time so that the dry film thickness was about 25 μm, and then dried at a temperature of 25 ° C. for 24 hours. Refurbished parking facilities.

(Comparative Example 4)
Test plates of Comparative Examples 4-1 to 4-5 were prepared in substantially the same manner as in Example 7 except that the following degreasing treatment and the like were performed instead of the degreasing treatment with the porous body of the melamine resin.
Comparative Example 4-1: Degreasing treatment with organic solvent (normal hexane 50% by mass, xylene 30% by mass and isopropyl alcohol 20% by mass) Comparative Example 4-2: Comparison of degreasing treatment with aqueous detergent used in Comparative Example 3 Example 4-3: Keren treatment comparative example with nonwoven fabric abrasive (trade name “Scotch Bright”, manufactured by Sumitomo 3M Co., Ltd., P320 equivalent) 4-4: Wipe (dried) wiping treatment comparative example 4-5: No degreasing treatment

(Repel evaluation)
In Example 7 and Comparative Examples 4-1 to 4-5, it was visually evaluated whether or not the one-component aqueous polyurethane resin paint was repelled when the one-component aqueous polyurethane resin paint was applied. As a result, in Example 7, the one-component water-based polyurethane resin coating was applied without being repelled whether the melamine-based resin porous material was used as it was or wetted with water. In Comparative Example 4, the one-part aqueous polyurethane resin paint is not repelled when degreased with an organic solvent (Comparative Example 4-1) and when degreased with a nonwoven fabric abrasive (Comparative Example 4-3). However, when degreasing with an aqueous detergent (Comparative Example 4-2), when wiping with only a waste (Comparative Example 4-4), when not degreasing (Comparative Example 4-5) The one-component water-based polyurethane resin paint was repelled.

(Peel test)
When a peel test was performed in the same manner as in Example 6, none of the test pieces of Example 7 peeled, whereas all of the test pieces of Comparative Examples 4-1 to 4-5 peeled. In addition, all the test plates of Example 7 were excellent in corrosion resistance as in Reference Example 1 and the like.

Claims (10)

It is characterized by performing a degreasing treatment using a porous body of melamine resin or a polishing process of polishing with a porous body of melamine resin before applying a water-based anticorrosive paint excellent in corrosion resistance to the housing of the parking facility and drying it. Rust preventive painting method for parking equipment.   The water-based anticorrosive paint contains at least one resin selected from the group consisting of an acrylic resin, a urethane resin, an epoxy resin, a vinyl resin, and a silicone resin and a rust inhibitor. The rust preventive coating method for parking equipment according to claim 1.   The rust-proof coating method for a parking facility according to claim 1 or 2, wherein the water-based rust-proof paint is a one-component paint or a two-component paint.   The rust-proof coating method for a parking facility according to any one of claims 1 to 3, wherein an overcoat water-based paint is applied on the water-based rust-proof paint applied to the housing and dried.   The overcoating water-based paint contains at least one resin selected from the group consisting of an acrylic resin, a urethane resin, an epoxy resin, a vinyl resin, a silicone resin, and a fluorine resin and a pigment. The rust preventive coating method for parking equipment according to claim 4.   Before applying the water-based anticorrosive paint to the casing, the water-based zinc rich paint is applied and dried, and the top coat containing the fluororesin and the pigment on the water-based anticorrosive paint applied to the casing. 6. The antirust coating method for a parking facility according to claim 5, wherein a water-based paint is applied and dried.   The rust-proof coating method for a parking facility according to any one of claims 4 to 6, wherein the topcoat water-based paint is a one-component paint or a two-component paint.   After the said housing is assembled, the said water-system anticorrosion coating material is apply | coated to the said housing by the antirust coating method of the parking equipment of any one of Claims 1-7, and it dries, The new installation of the parking equipment characterized by the above-mentioned Method.   A method of repairing a parking facility, wherein the water-based anticorrosive paint is applied to a housing of an existing parking facility by the antirust coating method for a parking facility according to any one of claims 1 to 7 and dried. The method for refurbishing a parking facility according to claim 9 , wherein the casing is pretreated (excluding the degreasing treatment and the polishing treatment) before applying the water-based anticorrosive paint.