1 SURFACE TREATMENT The science of （1表面处理的科学）.pdf

Jude web_30_AIT_0110 12/8/10 12:46 PM Page 30 1 SURFACE TREATMENT The science of successfully anodizing die cast substrates Die castings pose some of the most challenging problems in A review of several questions received in anodizing. The finish can be too thin, non-uniform and/or have an ‘Products Finishing Magazine’ over the years 2001 - 2009 ( 1-8) determined unfavourable appearance. generally consistent problems with These are common problems with a variety of practical solutions; anodizing die castings. The problems can be summarized as they are easy to recognize, but in many instances, the source for follows: 1) the anodic oxide finish is too the problem remains unknown. thin to meet the necessary design specification or much thinner when Critical to solving the problems of anodizing die castings is compared to corresponding components manufactured from wrought processes; 2) understanding the die cast substrate and the impact of