47. Study on the Aesthetic Behavior of Anodic Oxidation in ADC12 Aluminum Alloy

Anodizing/Anodic oxidation is the most common surface treatment of aluminum and its alloys for automobile and aerospace applications. Poor aesthetic appearance (scattered patches on the surface) is the common problem in pressure die-cast ADC12 aluminum alloy when it is subjected to anodic oxidation at higher temperature due to surface segregation. Surface segregation is inevitable in this material where it is a commercial aluminum alloy and having a high level of impurity contents. High impurity will ease to form alloy segregation in surface and subsurface during pressure die-casting and reflect poor surface appearance like yellow color patches. This case study deals to solve the poor aesthetic behavior in ADC12 alloy during the anodic oxidation process. Process condition study was done to eliminate this problem.