[China Aluminum Industry Network] Oxidation in the process of coloring:
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Extrusion of aluminum alloy profiles, the surface corrosion resistance is not strong, must be anodized surface treatment to increase the aluminum corrosion resistance, wear resistance and appearance of the appearance.
Xifei Aluminum informs its main process:
1. Surface pretreatment: Chemical or physical methods are used to clean the surface of the profile, exposing the pure matrix to facilitate obtaining a complete and dense artificial oxide film. It is also possible to obtain a specular or matt (matte) surface Xi'an building materials market by mechanical means.
2. Anodizing: After surface pretreatment of the profile, under certain process conditions, anodization occurs on the surface of the substrate to form a dense, porous, strong AL203 film layer.
3. Sealing: The pores of the pores of the porous oxide film formed after the anodization are closed, so that the oxide film is prevented from pollution, corrosion and abrasion resistance. The oxide film is colorless and transparent. By using the strong adsorption of the oxide film before sealing, some metal salts can be adsorbed and deposited in the film pores, which can make the appearance of the material besides the colors (silver white), such as: black, bronze, Gold and stainless steel and so on.