JP7804480B2 - Detergent composition for non-ferrous metals - Google Patents

Description

The present invention relates to a cleaning composition for non-ferrous metals, etc., and a method for cleaning components using the cleaning composition for non-ferrous metals, etc.

Non-ferrous metals such as aluminum and alloys of these non-ferrous metals (hereinafter, in this specification, non-ferrous metals such as aluminum and alloys of these non-ferrous metals will be collectively referred to as "non-ferrous metals, etc.") are processed and used in industrial products in a variety of fields.

Non-ferrous metals, etc. are cleaned with various detergent compositions to remove processing oils, processing debris, etc. that adhere to the surface of the non-ferrous metals, etc. during or after processing. However, since non-ferrous metals, etc. are prone to discoloration due to corrosion and are prone to poor appearance, the detergent compositions may contain rust inhibitors to prevent this corrosion.

There is technology that uses aliphatic carboxylic acids as corrosion inhibitors for metal parts, etc. For example, Patent Document 1 describes a metal product detergent composition that has high rust prevention and wastewater treatment (biological treatment) properties, as well as high cleaning (degreasing) properties. The detergent composition contains an amine soap of a vegetable fatty acid containing at least one of oleic acid and linoleic acid, a polyoxyethylene-based nonionic surfactant, a glycol ether-based water-soluble organic solvent, a sequestering agent, a dibasic fatty acid amine soap, and water. The example specifically describes a detergent composition containing tall oil fatty acid amine soap, polyethylene glycol para-isooctylphenyl ether, dipropylene glycol monomethyl ether, ethylenediaminetetraacetic acid, a dibasic fatty acid amine soap, and water.

Patent Document 2 also describes a cleaning composition for non-ferrous metals, etc., which is highly safe and effective in cleaning, can impart rust prevention to ferrous metal parts, and does not corrode non-ferrous metal parts. The composition is adjusted to a pH of 5 to 10 using a nonionic surfactant, an aliphatic carboxylic acid, an aromatic carboxylic acid, and an organic alkali. In the examples, a cleaning composition containing polyoxyethylene polyoxypropylene 2-ethylhexyl ether, oleic acid, p-toluic acid, N-methylethanolamine, and water is specifically described.

Patent Document 3 also describes a cleaning composition for metal articles that has excellent cleaning properties and metal corrosion inhibition performance, and is characterized by containing an amine, a dicarboxylic acid amine salt, a monocarboxylic acid amine salt, a specific nonionic surfactant, and water. The examples specifically describe a cleaning composition containing triethanolamine, 1,10-decanedicarboxylic acid triethanolamine salt, oleic acid triethanolamine salt, a nonionic surfactant obtained by adding propylene oxide (4.5 moles) to polyethylene glycol (7) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether, and water.

Japanese Patent Application Publication No. 7-268674 JP 2013-213266 A Japanese Patent Application Laid-Open No. 2020-117644

For reasons of economic efficiency, the detergent composition is transported and stored in the form of a concentrated liquid or concentrated powder, and is diluted to an appropriate concentration with dilution water, such as city water or industrial water, before use. If the dilution water has high hardness, the aliphatic carboxylic acids in the detergent composition may form metal soaps and precipitate, preventing the detergent composition from fully demonstrating its rust-preventing effect. Furthermore, the precipitated metal soaps may aggregate and/or settle, affecting the operational stability of the cleaning equipment. Typical hardness components that may be contained in the dilution water include calcium ions and magnesium ions.

To address this issue, the metal product detergent composition described in Patent Document 1 softens hard water by containing a sequestering agent, thereby inhibiting the conversion of aliphatic carboxylic acids into metal soaps. However, since ethylenediaminetetraacetic acid, which is specifically described in Patent Document 1, is a difficult-to-decompose compound, it is desirable to avoid using ethylenediaminetetraacetic acid.

The present invention was made in consideration of the above-mentioned circumstances, and aims to provide a detergent composition for non-ferrous metals, etc., which can suppress the deposition of aliphatic carboxylic acid metal soaps and prevent a decrease in rust prevention effect even when high-hardness dilution water is used, without using a sequestering agent, which is a persistent compound, and a method for cleaning non-ferrous metals, etc., using the detergent composition for non-ferrous metals, etc.

The present invention provides
A compound (component A) represented by the following general formula (I):
R ¹ -COOM (I)
(In general formula (I), ^R1 represents a linear or branched alkyl or alkenyl group having 11 to 21 carbon atoms, and M represents a cation or a hydrogen atom.)
A nonionic surfactant (component B) represented by the following general formula (II), and R ² —O—{(EO)n/(PO)m}—H (II):
(In general formula (II), ^R2 is an alkyl group having from 16 to 21 carbon atoms or an alkenyl group having from 16 to 21 carbon atoms, EO is an ethyleneoxy group, PO is a propyleneoxy group, n is the average number of moles of EO added, m is the average number of moles of PO added, n is a number of from 2 to 20, m is a number of from 0 to 20, and the addition form of PO and EO in { } may be either a random arrangement or a block arrangement.)
This is a cleaning composition for non-ferrous metals, etc., which contains water (ingredient C).

The present invention also relates to a method for cleaning a component, which includes a cleaning step of cleaning a component containing non-ferrous metals or the like using the cleaning composition for non-ferrous metals or the like.

The present invention provides a detergent composition for non-ferrous metals that can suppress the deposition of aliphatic carboxylic acid metal soaps and prevent a decrease in rust prevention effect even when high-hardness dilution water is used, without using a sequestering agent, which is a persistent compound, and a method for cleaning non-ferrous metals using the detergent composition.

<Cleaning composition for non-ferrous metals, etc.>
The cleaning composition for non-ferrous metals etc. of the present embodiment comprises:
A compound (component A) represented by the following general formula (I):
R ¹ -COOM (I)
(In general formula (I), ^R1 represents a linear or branched alkyl or alkenyl group having 11 to 21 carbon atoms, and M represents a cation or a hydrogen atom.)
A nonionic surfactant (component B) represented by the following general formula (II), and R ² —O—{(EO)n/(PO)m}—H (II):
(In general formula (II), ^R2 is an alkyl group having from 16 to 21 carbon atoms or an alkenyl group having from 16 to 21 carbon atoms, EO is an ethyleneoxy group, PO is a propyleneoxy group, n is the average number of moles of EO added, m is the average number of moles of PO added, n is a number of from 2 to 20, m is a number of from 0 to 20, and the addition form of PO and EO in { } may be either a random arrangement or a block arrangement.)
The detergent composition for non-ferrous metals of this embodiment does not require the use of a sequestering agent, which is a persistent compound, and can suppress the deposition of aliphatic carboxylic acid metal soaps and the deterioration of the rust-preventing effect even when high-hardness dilution water is used. The reason why the detergent composition for non-ferrous metals of this embodiment exhibits such effects is not clear, but is thought to be as follows.

The cleaning composition for non-ferrous metals of this embodiment contains a hardness component. Even if the hardness component forms a metal soap with component A, component B disperses the metal soap, preventing the metal soap from precipitating. Furthermore, component B is present on the surface of the non-ferrous metal after cleaning, along with component A. Component B contains a long-chain alkyl group, which imparts hydrophobicity and allows the formation of a stable anti-rust film without inhibiting the effects of component A, resulting in good anti-rust efficacy. Therefore, it is believed that both stability and anti-rust efficacy can be achieved in cleaning solutions with high hardness.

[Compound represented by general formula (I) (Component A)]
The detergent composition for non-ferrous metals, etc. of this embodiment contains a compound represented by general formula (I) from the viewpoint of inhibiting corrosion of non-ferrous metals, etc. after cleaning. In this specification, the compound represented by general formula (I) is sometimes referred to as Component A. In general formula (I), ^R1 is a linear or branched alkyl or alkenyl group having from 11 to 21 carbon atoms, preferably an alkyl or alkenyl group having from 12 to 18 carbon atoms, and more preferably an alkyl or alkenyl group having 18 carbon atoms. Examples of Component A include saturated fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, arachidic acid, and behenic acid, or salts thereof; and unsaturated fatty acids such as palmitoleic acid, oleic acid, elaidic acid, cetoleic acid, erucic acid, brassidic acid, linoleic acid, linolenic acid, arachidonic acid, and stearic acid, or salts thereof. From the viewpoint of inhibiting corrosion of non-ferrous metals and the like after cleaning, Component A is preferably one or more selected from the group consisting of lauric acid, myristic acid, linoleic acid, oleic acid, and isostearic acid, or a salt thereof, and more preferably one or more selected from the group consisting of isostearic acid and oleic acid, or a salt thereof.

In the general formula (I), M is preferably an alkali metal ion, an ammonium ion, or a hydrogen atom, and more preferably a hydrogen atom.

The content of component A in the cleaning composition for non-ferrous metals, etc. is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, from the viewpoint of suppressing corrosion of non-ferrous metals, etc. after cleaning; and from the viewpoint of economy, it is preferably 0.5% by mass or less, more preferably 0.3% by mass or less.

[Compound represented by general formula (II) (Component B)]
The detergent composition for non-ferrous metals, etc., of this embodiment contains the compound represented by general formula (II) from the viewpoint of a hardness component and suppressing deposition of the metal soap of Component A. In this specification, the compound represented by general formula (II) may be referred to as Component B.

In the general formula (II), ^R2 is an alkyl group having 16 or more carbon atoms, preferably 18 or more carbon atoms, from the viewpoint of suppressing deposition of the hardness component and the metal soap of Component A, and 21 or less carbon atoms, preferably 18 or less carbon atoms, from the viewpoint of suppressing deposition of Component B, or an alkenyl group having 16 or more carbon atoms, preferably 18 or more carbon atoms, from the viewpoint of suppressing deposition of the hardness component and the metal soap of Component A, and 21 or less carbon atoms, preferably 18 or less carbon atoms, from the viewpoint of suppressing deposition of Component B. ^R2 may be linear or branched, but is preferably linear. Specific examples of ^R2 include at least one selected from a cetyl group, a stearyl group, and an oleyl group.

In the general formula (II), n is 2 or more, preferably 3 or more, more preferably 4 or more, and 20 or less, preferably 15 or less, more preferably 10 or less, and even more preferably 9 or less, from the viewpoint of improving cleanability and suppressing corrosion of non-ferrous metals such as iron and aluminum after cleaning. Also, in the general formula (II), m is 0 or more and 20 or less, preferably 10 or less, more preferably 5 or less, and even more preferably 1 or less, from the same viewpoint. Also, from the viewpoint of improving cleanability, it is preferable that the value of n is greater than the value of m.

The content of component B in the detergent composition for non-ferrous metals, etc. is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, from the viewpoint of inhibiting deposition of hardness components and metal soap of component A, and is preferably 0.2% by mass or less, more preferably 0.1% by mass or less, from the viewpoint of inhibiting corrosion of non-ferrous metals, etc. after cleaning.

The mass ratio of component B to component A in the detergent composition for non-ferrous metals, etc. (mass of component B/mass of component A) is preferably 0.1 or more, more preferably 0.2 or more, and even more preferably 0.4 or more, from the viewpoint of suppressing deposition of hardness components and metal soaps of component A; and from the viewpoint of suppressing corrosion after cleaning of non-ferrous metals, etc., it is preferably 10 or less, more preferably 4 or less, and even more preferably 2 or less.

[Water (component C)]
The cleaning composition for non-ferrous metals, etc. contains water. In this specification, water may be referred to as component C. As component C, industrial water, tap water, deionized water, etc. can be used. From the viewpoints of supplyability and cost, industrial water is preferred, and from the viewpoint of cleaning performance, ion-exchanged water is preferred. The content of component C in the cleaning composition for non-ferrous metals, etc. may be the balance of component A, component B, and other components described below. Specifically, the content of component C is preferably 95% by mass or more, more preferably 98% by mass or more and 99.95% by mass or less.

[Other ingredients]
The detergent composition for non-ferrous metals, etc. may contain components other than Component A, Component B, and Component C to the extent that the effects of the present invention are not affected. Examples of components other than Component A, Component B, and Component C include amines represented by the following general formula (III), pH adjusters such as acids and alkalis, solubilizers, dispersants, thickeners such as thickeners, antifoaming agents, preservatives, and colorants. In addition, it is preferable that the detergent composition for non-ferrous metals, etc. does not contain a sequestering agent such as ethylenediaminetetraacetic acid, which is difficult to decompose.

[Amine represented by general formula (III) (component D)]
The cleaning composition for non-ferrous metals, etc., further contains an amine represented by the following general formula (III) from the viewpoint of suppressing corrosion after cleaning of non-ferrous metals, etc. In this specification, the amine represented by the following general formula (III) may be referred to as component D.

(In general formula (III), R ¹ and R ² each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group, or a hydroxypropyl group, and R ³ represents a hydroxyethyl group or a hydroxypropyl group.)

Examples of component D include alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine, as well as alkylated and aminoalkylated products thereof. From the perspective of improving cleaning performance and suppressing corrosion of non-ferrous metals and the like after cleaning, component D may include monoethanolamine, monoisopropanolamine, N-methylmonoethanolamine, N-methylmonoisopropanolamine, N-ethylmonoethanolamine, N-ethylmonoisopropanolamine, N-phenylmonoethanolamine, N-phenylmonoisopropanolamine, N-benzylmonoethanolamine, N-benzylmonoisopropanolamine, diethanolamine, diisopropanolamine, N-dimethylmonoethanolamine, N-dimethylmonoisopropanolamine, N-methyldiethanolamine, N-methyldiisopropanolamine, N-diethylmonoethanolamine, N-diethylmonoisopropanolamine, N-ethyldiethanolamine, N-ethyldiisopropanolamine, N-phenyldiethanolamine, N-phenyl ... At least one selected from ethanolamine, N-phenyldiisopropanolamine, N-benzyldiethanolamine, N-benzyldiisopropanolamine, triethanolamine, N-(β-aminoethyl)monoethanolamine, N-(β-aminoethyl)monoisopropanolamine, N-(β-aminoethyl)diethanolamine, and N-(β-aminoethyl)diisopropanolamine is preferred, at least one selected from monoethanolamine, monoisopropanolamine, diethanolamine, N-methylmonoethanolamine, N-dimethylmonoethanolamine, N-ethylmonoethanolamine, triethanolamine, and N-(β-aminoethyl)monoethanolamine is more preferred, and at least one selected from monoethanolamine, diethanolamine, and triethanolamine is even more preferred.

The content of component D in the detergent composition for non-ferrous metals, etc. is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, from the viewpoint of suppressing corrosion of non-ferrous metals, etc. after cleaning, and is preferably 1.0% by mass or less, more preferably 0.7% by mass or less, from the viewpoint of reducing damage to the object to be cleaned.

The mass ratio of component D to component A in the detergent composition for non-ferrous metals, etc. (mass of component D/mass of component A) is preferably 0.1 or more, more preferably 0.2 or more, and even more preferably 0.4 or more, from the viewpoint of suppressing corrosion after cleaning of non-ferrous metals, etc.; and is preferably 10 or less, more preferably 4 or less, and even more preferably 2 or less, from the viewpoint of reducing damage to the object to be cleaned.

The pH of the cleaning composition for non-ferrous metals, etc. is preferably 4 or higher, more preferably 6 or higher, and even more preferably 8 or higher, from the viewpoint of reducing damage to the object to be cleaned; and from the viewpoint of safety against chemical burns, etc., it is preferably 10 or lower, more preferably 9.5 or lower, and even more preferably 9 or lower.

[Method for producing a detergent composition for non-ferrous metals, etc.]
The detergent composition for non-ferrous metals, etc. can be produced by blending the above-mentioned components by a known method. The term "blending" as used herein includes mixing the above-mentioned components simultaneously or in any order.

[Concentrate of cleaning composition for non-ferrous metals, etc.]
The detergent composition for non-ferrous metals, etc. may be prepared as a concentrate by reducing the amount of water in component E to the extent that separation, precipitation, etc. do not occur and storage stability is not impaired. The concentrate of the detergent composition for non-ferrous metals, etc. is preferably a concentrate diluted 3 times or more from the viewpoint of transportation and storage, and is preferably a concentrate diluted 30 times or less from the viewpoint of storage stability. The concentrate of the detergent composition for non-ferrous metals, etc. can be used by diluting it with water so that each component has the above-mentioned content (i.e., the content at the time of cleaning) at the time of use. Furthermore, the concentrate of the detergent composition for non-ferrous metals, etc. can also be used by adding each component separately at the time of use. In the present disclosure, "at the time of use" or "at the time of cleaning" of a concentrated solution of the detergent composition for non-ferrous metals, etc. refers to the diluted state of the concentrate of the detergent composition for non-ferrous metals, etc.

<Method for cleaning components>
The method for cleaning a component of the present embodiment includes a cleaning step of cleaning a component containing non-ferrous metals or the like with the detergent composition for non-ferrous metals or the like.

In the cleaning step, examples of methods for cleaning components containing non-ferrous metals using the cleaning composition for non-ferrous metals include continuous cleaning, i.e., methods in which the cleaning composition for non-ferrous metals is brought into contact with the components by immersion cleaning, spray cleaning, brush cleaning, electrolytic cleaning, etc.

The cleaning method may, for example, include a drying step in which, after the cleaning step, excess non-ferrous metal cleaning composition adhering to the component is removed by air purging or the like, followed by drying.

The cleaning method can include a rinsing step in which the member containing the non-ferrous metal or the like is rinsed with water or the like after the cleaning step and before the drying step. However, from the perspective of suppressing corrosion of the non-ferrous metal or the like after cleaning, it is preferable not to include a rinsing step immediately after the cleaning step. Therefore, the cleaning composition for non-ferrous metals or the like can be used as a no-rinse cleaning composition for non-ferrous metals or the like.

<Preparation of cleaning composition for non-ferrous metals, etc.>
Detergent compositions for non-ferrous metals and the like according to the examples and comparative examples were obtained by adjusting the compositions to those shown in Table 1 or 2. The meanings of the symbols used in each table are as follows.

[Component A]
-Lauric acid [Wako First Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.]
Myristic acid [Wako Special Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.]
Linoleic acid [Wako Grade 1, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.]
- Oleic acid [Wako Grade 1, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.]
Isostearic acid [Kyoto Alcohol Industry Co., Ltd.]

[Component B]
Polyethylene glycol (8) cetyl ether [Braunon CH308, manufactured by Aoki Oil & Fat Industries Co., Ltd.]
Polyethylene glycol (4) oleyl ether [Brownon EN1504, manufactured by Aoki Oil & Fat Industries Co., Ltd.]
Polyethylene glycol (9) oleyl ether [Brownon EN1509, manufactured by Aoki Oil & Fat Industries Co., Ltd.]
Polyethylene glycol (13.5) oleyl ether [Brownon EN1513.5, manufactured by Aoki Oil & Fat Industries Co., Ltd.]
Polyethylene glycol (15.0) stearyl ether [Brownon SR715, manufactured by Aoki Oil & Fat Industries Co., Ltd.]

[Non-component B]
Polyethylene glycol (5) tridecyl ether [Finesurf TD-50, manufactured by Aoki Oil & Fat Industries Co., Ltd.]
Polyoxyethylene (10) octylphenyl ether [Fujifilm Wako Pure Chemical Industries, Ltd., biochemical grade]
Polyethylene glycol (5) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether [Nippon Shokubai Co., Ltd., Softanol 50]

Nonionic surfactants 1, 2, and 3 in Table 2 were synthesized using the following methods.

[Synthesis Example of Nonionic Surfactant 1]
2-Ethyl-1-hexanol [Wako Special Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.] was charged into an autoclave, and after nitrogen substitution, the system was dehydrated under reduced pressure to reduce the water content in the system to 0.2% by mass or less. Ethylene oxide (12 moles) was then added at 125°C and 0.3 MPa or less, and the mixture was aged to obtain an EO adduct. Next, propylene oxide (2 moles) was added at 125°C and 0.3 MPa or less, and the mixture was aged to obtain an EO-PO adduct. The obtained nonionic surfactant 1, when expressed by the general formula (II) above, has R ² : 2-ethylhexyl group, n: 12, and m: 2.

[Synthesis Example of Nonionic Surfactant 2]
Lauryl alcohol (1 mol, "Kalcol 2098" manufactured by Kao Corporation) and a catalytic amount of potassium hydroxide (manufactured by Nacalai Tesque, Inc.) were charged into an autoclave, and after nitrogen substitution, the system was dehydrated under reduced pressure to reduce the water content in the system to 0.2 mass% or less. Ethylene oxide (6 mol) was added at 125°C and 0.3 MPa or less, and ripening was performed to obtain an EO adduct. The obtained nonionic surfactant 2 is represented by formula (II), where ^R2 is a dodecyl group, n is 6, and m is 0.

[Synthesis Example of Nonionic Activator 3]
Polyethylene glycol (7) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether (1 mol, "SOFTANOL 70" manufactured by Nippon Shokubai Co., Ltd.) and a catalytic amount of potassium hydroxide (manufactured by Nacalai Tesque, Inc.) were charged into an autoclave, and after nitrogen substitution, the system was dehydrated under reduced pressure to reduce the water content to 0.2% by mass or less. Propylene oxide (4.5 mol) was added at 125°C and 0.3 MPa or less, and the mixture was aged to obtain an EO-PO adduct (nonionic surfactant B11). The obtained nonionic surfactant 3, when expressed by the general formula (II) above, has R ² : dodecyl or tetradecyl group, n: 7, and m: 4.5.

[Component D]
Monoethanolamine (MEA) [2-aminoethanol, special grade reagent, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.]
Diethanolamine (DEA) [2,2'-iminodiethanol Wako First Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.]
Triethanolamine (TEA) [2,2',2"-nitrilotriethanol, Wako First Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.]
N-methylethanolamine [amino alcohol MMA, manufactured by Nippon Nyukazai Co., Ltd.]

[Other ingredients]
Dodecanedioic acid: [Wako Special Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.]
Sodium hydroxide: [Kanto Chemical Co., Ltd., special grade, solid content 48% by mass]

<Preparation of Cleaning Composition>
The detergent compositions for non-ferrous metals etc. according to each Example or Comparative Example were prepared by the following procedure so that the content of each component shown in Table 1 or Table 2 was as shown in the respective tables. The numerical values showing the content of each component in Tables 1 and 2 represent the amount of the active ingredient, and the unit is % by mass.
Step 1: Water was added to a container, and each component was added and mixed with stirring to obtain a mixed solution.
Procedure 2. The pH was the pH of the cleaning composition at 25°C, and the value was measured 3 minutes after immersing the electrode of a pH meter (HM-30G, manufactured by DKK-Toa Corporation) in the cleaning composition.

<Evaluation>
[Rust prevention evaluation]
[Evaluation when the concentration of hardness components in the cleaning composition for non-ferrous metals, etc. is 0 ppm]
100 g of each cleaning composition for non-ferrous metals, etc. according to each Example or Comparative Example was mixed into a 100 mL glass beaker and heated to 60°C. An aluminum alloy plate (ADC12, 50 mm x 20 mm x 1.6 mm) that had been degreased and cleaned with acetone was immersed in the cleaning composition for non-ferrous metals, etc. for 30 seconds. The aluminum alloy plate was removed from the cleaning composition for non-ferrous metals, etc. and dried by air blowing without rinsing. The dried aluminum alloy plate was immersed in 50 g of ion-exchanged water heated to 60°C for 1 hour. The amount of aluminum ions eluted into the water after immersion was measured using an ICP optical emission spectrometer (Agilent 5110 ICP-OES, manufactured by Agilent). The amount of aluminum eluted per unit area (g/m ² ) was calculated from the measurement result and the surface area of the aluminum alloy plate. The surface of the aluminum alloy plate after the test was visually observed and evaluated according to the following evaluation criteria.
4: 100-75% of the surface has black discoloration. 3: 75-50% of the surface has black discoloration. 2: 50-25% of the surface has black discoloration. 1: 25-0% of the surface has black discoloration.

[Evaluation when the concentration of hardness component (calcium ion or magnesium ion) in the detergent composition for non-ferrous metals, etc. is 100 ppm]
Calcium chloride or magnesium chloride was added to 100 ml of each of the cleaning compositions for non-ferrous metals, etc. according to the Examples or Comparative Examples so that the calcium ion or magnesium ion content of the hardness component was 100 ppm, and the composition was allowed to stand at 60°C for 24 hours, and the rust prevention properties were evaluated in the same manner as in the evaluation of the rust prevention properties described above.

[Evaluation of Metal Soap Deposition Inhibition]
Calcium chloride or magnesium chloride was added to 100 ml of each of the cleaning compositions for non-ferrous metals, etc. according to the Examples or Comparative Examples so that the calcium ion or magnesium ion content of the hardness component was 100 ppm, and the composition was allowed to stand at 60°C. After 24 hours and 48 hours, the appearance of the cleaning composition for non-ferrous metals, etc. was checked for the presence or absence of precipitation of metal soap.

The results of each of the above evaluations are shown in each table.

Claims (8)

A compound (component A) represented by the following general formula (I):
R ¹ -COOM(I)
(In general formula (I), ^R1 represents a linear or branched alkyl or alkenyl group having 11 to 21 carbon atoms, and M represents a cation or a hydrogen atom.)
A nonionic surfactant (component B) represented by the following general formula (II), and R ² —O—{(EO)n/(PO)m}—H(II):
(In general formula (II), ^R2 is an alkyl group having from 16 to 21 carbon atoms or an alkenyl group having from 16 to 21 carbon atoms, EO is an ethyleneoxy group, PO is a propyleneoxy group, n is the average number of moles of EO added, m is the average number of moles of PO added, n is a number of from 2 to 20, m is a number of from 0 to 20, and the addition form of PO and EO in { } may be either a random arrangement or a block arrangement.)
Contains water (component C) ,
a mass ratio of the component B to the component A (mass of the component B/mass of the component A) is 0.1 or more and 10 or less,
The cleaning agent composition for non-ferrous metals and their alloys, wherein the content of the component A is 0.005% by mass or more and 0.5% by mass or less . 2. The cleaning agent composition for non-ferrous metals and their alloys according to claim 1, wherein a content of the component B is 0.01 mass % or more and 0.2 mass % or less. 3. The cleaning composition for non-ferrous metals and their alloys according to claim 1 or 2, further comprising an amine (component D) represented by the following general formula (III):
(In general formula (III), R ¹ and R ² each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group, or a hydroxypropyl group, and R ³ represents a hydroxyethyl group or a hydroxypropyl group.) 4. The cleaning agent composition for non-ferrous metals and their alloys according to claim 3, wherein a mass ratio of the component D to the component A (mass of the component D/mass of the component A) is 0.1 or more and 10 or less. A method for cleaning a component, comprising: a cleaning step of cleaning a component containing a non-ferrous metal and its alloy with the detergent composition for non-ferrous metals and their alloys according to any one of claims 1 to 4. The method for cleaning a component according to claim 5, further comprising a drying step after the cleaning step. The method for cleaning a component according to claim 6, which does not include a rinsing step after the cleaning step and before the drying step. 8. The method for cleaning a member according to claim 5, wherein the non-ferrous metal or its alloy is aluminum or an aluminum alloy.