What Kind Of Material Is Anodized Alumina? What Are The Features?

Anodic oxidation can significantly improve the corrosion resistance of aluminum alloy, improve the surface hardness and wear resistance of aluminum alloy, after proper coloring treatment has good decorative performance. Aluminum and its alloy anodic oxide film coloring technology can be divided into three kinds: chemical coloring, electrolytic coloring and electrolytic integral coloring. Chemical dyeing is the use of oxide film porous and chemical activity adsorption of various pigments to make the oxide film coloring, according to the coloring mechanism and process can be divided into organic dye coloring, inorganic dye coloring, color printing, cross-color dyeing and achromatic dyeing. Electrolytic coloring is the AC electrolysis of anodized aluminum and its alloy in aqueous solution containing metal salts, and the deposition of metal, metal oxides or metal compounds at the bottom of the porous layer of the oxide film, which presents various colors due to the scattering of light by the electric sediments. Electrolytic integral coloring refers to the aluminum and its alloys are colored at the same time of anodic oxidation, which is characterized by oxidation and coloring in one step, and the coloring film has good light resistance, heat resistance, corrosion resistance and wear resistance. Electrolytic overall coloring can be divided into natural coloring, electrolytic coloring and power coloring, in which electrolytic coloring is dominant, natural coloring is second, and power coloring is under development.

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