A model was constructed to calculate the current distribution among various alloys under mixed alloy anodizing conditions, and in turn to predict the thickness of the anodic coatings formed on the alloys during the mixed alloy anodizing process. This theoretically based method takes into consideration many process parameters, including constant voltage anodizing, constant current anodizing, different combinations of aluminum alloys and different surface area ratios of the various alloys in the mixed alloy load. The accuracy of this method was tested with a number of cases of mixed alloy loads using different combinations of alloys and varied surface area ratios. The results of the case studies demonstrate that the model can accurately predict the anodic coating thickness formed under various anodizing conditions during mixed alloy anodizing.
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