Coating method capable of maintaining original color of aluminum alloy tanker

Abstract

The invention relates to the field of coating of aluminum alloy tankers, in particular to a coating method capable of maintaining an original color of an aluminum alloy tanker. The coating method includes the following steps: step 1, processing before coating; step 2, repairing appearance defect positions of an aluminum alloy substrate; step 3, coating varnish. By the coating method, appearance defects like scratches, blackening and corrosion of the surface of aluminum alloy can be repaired, original unique metal colors of an aluminum alloy tank body and aluminum alloy parts of the aluminum alloy tanker can be maintained, and self-made repair layer painting and self-made painting special for aluminum alloy, which are coated by the coating method have excellent adhesiveness and weatherability; the painting special for the self-made aluminum alloy has high transparency, and the whole surface of an aluminum alloy workpiece is enabled to present high gloss, so that color and glossiness of the whole surface of the aluminum alloy workpiece are enabled to present uniform effect.

Description

technical field [0001] The invention relates to the field of coating of aluminum alloy tank cars, in particular to a coating method for maintaining the original color of aluminum alloy tank cars. Background technique [0002] Aluminum alloy tank cars are generally used to transport oil products, liquid chemicals and water, etc., and their tank bodies and parts are made of aluminum alloy. Because the aluminum alloy material has excellent anti-corrosion performance and metallic luster that cannot be displayed by the coating film, when most aluminum alloy tank cars leave the factory, the manufacturer does not paint the aluminum alloy tank body and aluminum alloy parts, but keeps the aluminum alloy tank original color. The user is also very satisfied with the appearance of this aluminum alloy tank car, and specifies in the purchase contract that the aluminum alloy tank car with the original color of aluminum alloy is required. [0003] However, during the processing of aluminu...

AI Technical Summary

Problems solved by technology

However, the above-mentioned surface treatment processes make the aluminum alloy surface lose the unique metallic luster of cold rolling; in addition, the epoxy resin in the epoxy primer is not resistant to ultraviolet radiation, and must be matched with hiding power and ultraviolet resistance when used outdoors A good topcoat can ensure the service life of the epoxy primer, and a topcoat with good hiding power will completely cover the aluminum alloy substrate, resulting in the loss of the original unique luster of the aluminum alloy substrate surface