Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Galvanic corrosion between anodized aluminum and chrome plated steel

I am using chrome-plated plain ball bearings inside sealed from moisture aluminum housings. Does hard anodizing help prevent galvanic corrosion between the two? Any other tips for a long-lasting service life?

Bob Piet
- Denver, Colorado
2002

Yes, anything that reduces metal to metal contact, or that coats a surface so that it is less free to conduct electricity or less free to participate in ionic reactions will reduce galvanic activity. I do not think I would expect any galvanic activity or corrosion on the balls or races of such a sealed bearing.

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

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