The process flow of color anodizing roughly includes the following steps:

Cleaning and degreasing: Firstly, metal workpieces need to be thoroughly cleaned and degreased to remove impurities, oil stains, and oxides on the surface, ensuring that the oxide film can be uniformly formed

Electrolytic treatment: Subsequently, the metal workpiece is immersed in a solution containing electrolytes such as sulfuric acid and oxalic acid, and subjected to direct current. Under the action of an electric field, an oxide film begins to form on the metal surface

Dyeing and sealing: After the formation of the oxide film, dyeing treatment can be carried out as needed to obtain the desired color effect. After dyeing, it is necessary to perform sealing treatment to improve the density and corrosion resistance of the oxide film

Color generation mechanism

The color production of colored anodizing mainly depends on the thickness and pore structure of the oxide film. During the anodizing process, by precisely controlling parameters such as current density, voltage, and time, the thickness and porosity of the oxide film can be adjusted, which in turn affects the refraction and interference effects of light on the surface of the oxide film, resulting in different colors. These colors may vary with the angle of observation, exhibiting unique visual effects

Application Fields

Color anodizing technology is widely used in fields such as architecture, automotive, electronics, aerospace, etc. In the field of architecture, it can be used for surface treatment of decorative metal components; In the automotive field, it can be used to manufacture car wheels, body decorations, etc; In the field of electronics, it can be used to manufacture the casing and internal components of electronic products. In addition, color anodizing can also be used to manufacture products that require high wear resistance, high corrosion resistance, and good decorative properties, such as medical equipment and sports equipment

Conclusion

Color anodizing is an advanced metal surface treatment technology that enhances the wear resistance, corrosion resistance, and aesthetics of metals by forming colored oxide films. Its unique color effect and wide range of applications make it an indispensable part of modern manufacturing