JPS5847231B2 - Coating method for inorganic zinc-based paint in the production of large structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for applying an inorganic zinc-based paint in the manufacture of large structures.

Generally, in the production of large structures such as ships, parts are assembled one by one from steel plates and shaped steel, and then each part is assembled into small blocks and then large blocks through small and large assemblies, and finally these blocks are assembled. This is done through a step-by-step assembly process that involves total assembly.

Therefore, the painting work is also carried out in stages according to the assembly stages, as will be explained below.

That is, taking a ship's tank as an example, first, the steel plates and shapes are blasted and then coated with a rust-preventing primer (shop priming method).

Next, after parts and blocks are assembled from rust-preventing primer coated steel plates and shaped steel, that is, after the tank is formed, the blocks are sanded with a power tool such as a disc sander or a power brush. Perform the base treatment and then apply the main coating.

After the painted blocks are loaded onto the ship, the connecting parts of the blocks are painted, and any damage to the paint film caused by the attachment of sacrificial items placed inside the ship is repaired to complete the painting work.

Incidentally, inorganic zinc-based paints have recently attracted attention as paints that form coating films with excellent corrosion resistance, heat resistance, and wear resistance, and have already been adopted in various fields.

However, in order to ensure sufficient adhesion between the paint film and the workpiece and to prevent the paint film from cracking or peeling, the surface of the workpiece must be roughened before painting. It is necessary to keep it.

Therefore, blasting is essential for surface treatment, which inevitably (1) makes the work complicated and disadvantageous in terms of cost, (2) requires blasting equipment and dust collection equipment, and (3)
) Problems arose such as the need to secure blasting had a negative impact on other work processes, and (4) the need to secure a work area for blasting.

This invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to solve the above-mentioned problems as much as possible when using an inorganic zinc-based paint as a paint in the manufacture of large structures.

The painting method according to the present invention includes the steps of blasting steel plates and shaped steel, which are materials for large structures, and applying an inorganic zinc-based rust-preventing primer paint using a shop priming method; After assembling the blower and glue from shaped steel, etc., the block is prime-treated with a power tool to thicken the surface roughness, and then an inorganic zinc-based anti-corrosion primer paint is applied as a binder coat.
Furthermore, there is a process of applying an inorganic zinc-based paint, and then after the above-mentioned painted blocks are loaded into the ship, the connecting parts of the blocks are similarly prepared with a power tool, and then an inorganic zinc-based anti-corrosion primer paint is applied. This is a method for applying an inorganic zinc-based paint in the manufacture of large structures, which includes a step of applying an inorganic zinc-based paint.

In the above, as the power tool, a disc sander, wire wheel, baby brush, chipping hammer, needle can, etc. are used.

Then, the surface of the object to be coated is made into a highly rough state by surface treatment using a power tool.

Further, as an inorganic zinc-based rust-preventing undercoat, 70% zinc powder and 30% modified silicone resin are preferably used, but the invention is not limited thereto.

Painting of blocks assembled from steel plates, shaped steel, etc.
It may be applied only to damaged parts of the paint film, such as the parts where the coating has been damaged, or the entire area.

When painting blocks mounted on a ship, blasting may be used as a base treatment.

In this case, the ship may be filled with dust, impairing work hygiene, and the dust remaining on the surface of the object to be painted may have an adverse effect on the coating film.

Therefore, in such a case, it is preferable to use a vacuum type blasting device which itself has an abrasive material collection mechanism as the blasting device to suppress the generation of dust as much as possible.

In addition, when using a steel abrasive such as a steel grid or shot, it is difficult to collect all of the generated steel dust, which has a large negative impact on the paint film, but the abrasive This problem can be solved by using slag of nickel, copper, etc. as the material.

Since the present invention is configured as described above, blasting can be greatly reduced, thus simplifying the work and achieving labor savings.

Furthermore, since fewer blasting devices and dust collectors are required, equipment costs can be reduced, and the area in which blasting is performed can also be reduced.

Claims (1)

[Claims] 1. A process of blasting steel plates and molded steel, etc., which are materials for large structures, using the shop plastic coating method, and then applying an inorganic zinc-based rust-preventing primer paint; After assembling the block, the block is primed with a power tool to increase the surface roughness, and then an inorganic zinc-based rust-preventing primer paint is applied as a binder coat, and then an inorganic zinc-based paint is applied. Next, after the above-mentioned painted blocks are loaded into the ship, the connection parts of the blocks are similarly prepared with a power tool, and then an inorganic zinc-based rust-preventing primer paint is applied, and then an inorganic zinc-based paint is applied. A method for applying inorganic zinc-based paints in the production of large structures.