Aluminum coloring process

【China Aluminum Industry Network】Aluminum profiles need to be oxidized before they are painted. Extrusion of good aluminum alloy profiles has poor surface corrosion resistance and must be anodized for external disposal to add resistance to aluminum. Erosion, wear resistance and the appearance of beautiful.

Its main process is:

(1) Appearance pre-treatment: Chemical or physical methods are used to clean the appearance of the profile, exposing the pure matrix to facilitate obtaining a complete and fine artificial oxide film. It is also possible to obtain a specular or matt (matte) appearance by mechanical means.

(2) Anodic Oxidation: Under the certain technical conditions, the externally pre-treated profiles undergo anodic oxidation to form a fine, porous, strong AL203 film layer.

(3) Sealing: The pores of the porous oxide film formed after the anodization are closed, so that the oxide film can be prevented from contamination, corrosion and abrasion resistance. Oxide film is colorless and bright. The strong adsorption of the oxide film before sealing is used. Adsorption of some metal salts in the film pores can make the appearance of the profile besides flashing (silver white), such as: black, bronze, Gold and stainless steel and so on.

The

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