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Stripping hard anodising without dimensional change?

Hello I need too remove hard anodising from a disc which is around 50 µm but the only problem is that it has a bore in the middle with close tolerance any other way without using caustic etch many thanks Phil

Phil Martin
employee - United Kingdom
May 19, 2010

Hi, Phil. A mixture of chromic and phosphoric acid will strip anodizing without attacking the underlying aluminum. If you use the term "chromic-phosphoric stripping" in our search engine you will find many detailed discussions. But whatever the thickness of the anodizing, that much will be gone after stripping.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
May 20, 2010

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