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Letter 22010
Aluminum cathodes for anodizing
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What is the best alloy of aluminum to use for cathode in an
anodizing tank(sulfuric acid).
Vick Corso
fabtricators - Slidell, LA, U.S.
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6063 T6. For more info see letter
1177.
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Ted Mooney, P.E.
finishing.com
Brick, New Jersey
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The alloy of choice is 6063t6. It is the most durable Aluminum
alloy for sulfuric acid anodizing baths,both type II and III hard
coat. We have system using this alloy in the field for over 2 1/2
years with minimal material loss even without cathode protection.
Although there is some difference of opinion on the matter we prefer
the flexibility of bolted connections. Attend the talk at Sur/Fin on
equipment updates in anodizing in Milwaukee in June.
Drew Nosti CEF
Member AESF Light Metal Committee
Member AAC Hard Coat Committee
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