Currently, aluminum alloy die castings are widely used, and there is a higher demand for the quality and appearance of the products themselves. The appearance of the product after oxidation treatment is aesthetically pleasing, which is why many customers are confused as to why aluminum die castings cannot be oxidized. Today, we are here to clarify this for you!

To put it simply, anodizing is the entire process of air oxidation in this electrolytic method. During this process, the surface of aluminum and aluminum alloy profiles typically transforms into layers of anodic oxidation film. This anodic oxidation film has characteristics of defense, decorative art, and some other functions. From this definition, the anodizing process of aluminum only includes the entire process of converting into anodic oxidation film.

Aluminum alloy castings and castings often contain a high level of silicon content. Even when using the HT412 casting aluminum de-dusting agent, the anodic treatment film will appear dark brown, making it impossible to achieve a colorless, transparent anodic oxidation film. As the silicon content increases, the tone of the anodic treatment film ranges from light gray to dark gray, eventually to gray-black. Therefore, aluminum alloy castings are not suitable for traditional anodic treatment.