Many manufacturers in the surface treatment of various systems of aluminum should have found, die-casting aluminum is not suitable for anodizing. This is determined by the composition of die-cast aluminum and the characteristics of anodic oxidation, so why die-cast aluminum is not suitable for anodic oxidation?

First of all, anodic oxidation requires aluminum surface free of impurities, aluminum is relatively pure, because the anodic oxide film must ensure uniform and flat. The presence of impurities and other components in excess will certainly affect the thickness of the film when anodizing, and even directly affect whether the film. Most importantly, other metal elements may directly change the color of the film when the anodized film is generated, which is a direct death sentence for staining, etc., after anodizing.

Casting aluminum alloys and die-castings generally contain high silicon content, and even if ht412 special ash remover for die-cast aluminum is used, the anodic oxide film may be dark in color, and it is difficult to get a colorless and transparent oxide film, so casting aluminum alloys are not suitable for traditional anodic oxidation.

However, anodizing solutions are also available for die-cast aluminum. Die-casting can complete the structure and angular lines that are difficult to achieve with CNC parts. The quality of oxidation, the center of gravity is very critical to the quality of die-casting, and a small change, detail of the process support control determines the quality of oxidation. Manufacturers engaged in die casting oxidation, must scientifically support and control the mold runner technology, die casting process and post-processing methods, with this series of strict control process, can ensure the smooth production of oxidation quality.