Anodizing for Die Casting Aluminum

As a professional machining manufacturer, we receive a wide range of requests from our customers, some of whom ask us to do die casting and anodizing parts for them.I believe that many manufacturers will tell you die-casting aluminum is not suitable for anodizing. This is by the composition of die-casting aluminum and anodic oxidation characteristics of the decision, then die-casting aluminum is really not suitable for anodizing?

First of all, anodic anodizing needs the surface without impurities, aluminum is relatively pure, because the anodic anodizing film must ensure uniformity and flatness. The presence of impurities and other ingredients is too much, will certainly affect the anodizing of the thickness of the film, and even directly affect whether the film. Most importantly, other metal elements in the anodic oxidation film generation, may directly change the color of the film, which is on the anodic oxidation of staining, etc., a direct death sentence.

Casting aluminum alloy and die casting generally contain high silicon content, even if the use of ht412 die casting aluminum special ash remover, anodic oxidation film may also be dark, it is difficult to get a colorless and transparent oxide film, with the increase of silicon content, the color of the anodic oxidation film from the light grey to dark grey until the black grey. Therefore, casting aluminum alloy is not suitable for traditional anodic oxidation.

However, die casting aluminum also has an anodizing solution. Die casting can complete the forging parts, car parts / CNC parts difficult to do the structure, angular lines, the quality of oxidation, focusing on the quality of the die casting is very critical, a small change, the details of the process to support the control of the decision of the quality of the anode. Engaged in die casting oxidation manufacturers, must scientifically support the control of mold runner technology, die casting process and post-processing methods, with this series of strict control process, can ensure that the oxidation quality of the smooth production!