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Metal finishing Q&As since 1989

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Long-term durability of rough anodize finish?

I have machined aluminum parts that were not properly cleaned prior to the hard black anodizing process (I can see fingerprints, places where tape was applied and removed) and the anodized surface finish is rough in places. Is the long-term durability of the anodize coating compromised if submitted to repeated re-sterilization (autoclave cycles) in a hospital setting? Any suggestions on a fix here?

Amy Harrell
- Newport Beach, California, USA
2002

A second-rate or third-rate finish is a second-rate or third-rate finish and predictions regarding its durability and suitability should not be attempted. Rather, the anodized coating should be stripped and reapplied.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2002

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