How should aluminum alloy products be correctly colored

How should aluminum alloy products be correctly colored

The effect of aluminum alloy materials is also getting better and better now, first of all, because the quality of aluminum alloy products is good, and many properties can meet the needs of current life. Secondly, the price of aluminum alloy is relatively cheap, which is a lot more than other metal materials, and can also produce a variety of different effects according to the needs of customers. So, in the process of Jinan aluminum alloy processing, how should we better color the aluminum alloy? This is also a more critical issue.

First of all, the aluminum alloy profile must be oxidized, the extruded aluminum alloy profile, its surface corrosion resistance is not strong, and the surface treatment must be carried out by anodizing to increase the corrosion resistance, wear resistance and appearance of aluminum.

Surface pretreatment: The surface of the profile is cleaned by chemical or physical methods to expose a pure matrix to facilitate the complete and dense artificial oxide film. Mirror or matte (matte) surfaces can also be obtained by mechanical means.

Anodizing: After the surface pretreatment of the profile, under certain process conditions, the substrate surface anodizing, forming a dense, porous, strong adsorption AL203 film layer.

Hole sealing: the pores of the porous oxide film generated after anodic oxidation are closed to enhance the anti-pollution, anti-corrosion and anti-wear properties of the oxide film. The oxide film is colorless and transparent, using the strong adsorption property of the oxide film before sealing the hole, adsorbing and depositing some metal salts in the film hole, which can make the appearance of the profile show many colors other than the natural color (silver white), such as: black, bronze, gold and stainless steel color.

Electrophoretic coating, on the basis of anodic oxidation, through the action of electrophoresis, a layer of water-soluble acrylic paint film is uniformly covered on the oxide film, so that the surface of industrial aluminum profiles formed anodic oxide film and acrylic paint film composite film. Feel smooth and delicate, bright and bright appearance, in addition to the production of primary oxidation color based on color, can make more such as white and green and other bright colors.

In fact, the most commonly used or color powder spraying method, because the color powder spraying, not only the performance is relatively stable, and the film adhesion is also very strong, it is not easy to fall off. The use of spraying is like adding a coating to the aluminum alloy processing products, which is not volatile in the air, nor is there any toxicity, and the environmental performance is relatively better.