The main performance and process characteristics of anodized Aluminum oxide
Anodizing can significantly improve the corrosion resistance of aluminum alloys, increase the surface hardness and wear resistance of aluminum alloys, and have good decorative properties after proper coloring treatment.
Anodizing can significantly improve the corrosion resistance of aluminum alloys, increase the surface hardness and wear resistance of aluminum alloys, and have good decorative properties after proper coloring treatment. Aluminum and its Alloy anodic oxide film coloring technology can be divided into three types: chemical dyeing, electrolytic coloring and electrolytic overall coloring. Chemical dyeing uses the porosity and chemical activity of the oxide film layer to adsorb various pigments to color the oxide film. According to the coloring mechanism and process, it can be divided into organic dye coloring, inorganic dye coloring, color paste printing, overcoloring dyeing and decoloring dyeing. Wait. Electrolytic coloring is the alternating electrolysis of anodized aluminum and its alloys in an aqueous solution containing metal salts, depositing metals, metal oxides or metal compounds on the bottom of the porous layer of the oxide film, due to the scattering of light by the electrodeposits Present a variety of colors. Electrolytic overall coloring means that aluminum and its alloys are colored at the same time as anodizing. It is characterized by the completion of oxidation and coloring in one step. The colored film has good light resistance, heat resistance, corrosion resistance and wear resistance. The overall electrolytic coloring is divided into natural hair color, electrolytic hair color and power color hair method. Among them, electrolytic hair color is dominant, natural hair color is second, and power color hair color is under development.
Process characteristics:
1. Mechanical polishing;
2. Chemical treatment to remove the copper component on the surface of some alloys;
3. Clean and remove oil (for the parts that have been anodized, if you need to re-anodize, use alkali or special chemicals to remove the original anodized surface);
4. Put it in dilute sulfuric acid as an anode to energize to form a surface oxide layer (porous, white translucent film);
5. Dyeing;
6. Fix (heat or use chromate solution to close the pores of the surface oxide layer).
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