company news about Anodic Oxidation Dyeing Technique

The core of anodizing is to use aluminum as an anode and place it in an electrolyte (such as sulfuric acid, oxalic acid or chromic acid solution). The aluminum was oxidized at the anode to form an Al₂O₃ oxide film, which was firmly combined with the substrate and had a porous structure to further adsorb dyes or seal holes.

Oxidation dyeing process:

• Anodizing primer: Porous alumina film is formed by electrochemical process to build a "carrier" for subsequent dyeing and improve the corrosion resistance of parts.
• Organic dyeing: The use of acid or disperse organic dyes, can show red, blue, green and other bright colors, and even achieve gradual effect, especially suitable for electronic equipment shell, decorative parts.
• Inorganic dyeing: The use of silver, copper and other metal salts to penetrate the pores of the oxide film to form a calm tone, strong light resistance, anti-aging, suitable for outdoor industrial equipment, instruments and other scenes.
• Electrolytic coloring: After oxidation, metal ions such as nickel and tin are deposited in the film hole through electrolysis, presenting copper, champagne gold and other metallic texture color.

Finally, it is sealed and solidified to ensure that the CNC machining aluminum does not fade for a long time.