Aluminum alloy anodizing surface treatment in Suzhou oxidation plant has higher requirements for aluminum and aluminum alloy materials. Generally, only pure aluminum, aluminum clad, aluminum magnesium and aluminum manganese alloys can be dyed with bright colors. For alloys with high silicon and iron content, the oxide film can only be dyed dark because of its dark color. When aluminum and aluminum alloy parts of Suzhou oxidation plant are used for decorative anodic aluminum oxide, the following points should be paid attention to in material selection:

1. For parts with general decoration requirements, there is a maximum allowable content requirement for other components and impurities in aluminum,

2. Some aluminum alloys should be heat treated with reasonable specifications. The grain size has a certain influence on the structure and properties of the oxide film. The coarse grains react unevenly in the anodizing process of aluminum alloy, and often appear orange peel appearance. Therefore, aluminum is generally expected to have a finer grain structure.

3. For parts requiring lower surface brightness than the above, industrial high-purity aluminum and lt65 lt67 aluminum magnesium alloy with aluminum content higher than 99.9% can be selected.

4. For parts requiring mirror appearance, high-purity aluminum or 5a66 aluminum magnesium alloy with aluminum content higher than 99.99% must be selected. After chemical or electrochemical polishing, parts can be anodized with sulfuric acid to obtain colorless, transparent and bright films, which can be dyed with various bright colors.

5. The surface of aluminum materials selected for Anodizing of aluminum alloy in Suzhou oxidation plant shall be free from serious scratches, structural defects and inclusions. It will affect the appearance and corrosion resistance of the oxide film.