A coating method to keep the original color of aluminum alloy tank car

Abstract

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. The coating method for maintaining the original color of the aluminum alloy tank car comprises the following steps: step 1, pre-painting treatment; step 2, repairing the appearance defects of the aluminum alloy base; and step 3, coating varnish. The coating method for maintaining the original color of the aluminum alloy tank car provided by the invention can not only repair the appearance defects such as scratches, scratches, blackening and corrosion on the surface of the aluminum alloy, but also make the aluminum alloy tank body and the aluminum alloy tank body of the aluminum alloy tank car The parts maintain the original unique metallic color. The self-made repair layer coating and the self-made aluminum alloy special coating applied by this coating method have excellent adhesion and weather resistance; and the self-made aluminum alloy special coating has high transparency, making the whole The surface of the aluminum alloy workpiece exhibits high gloss, so that the color and gloss of the entire aluminum alloy workpiece surface are uniform.

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