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Accidental etching of cobalt based alloy while chrome plating

Is it possible that a cobalt based alloy would be selectively etched when hard chrome plating an adjacent area?

Gregory Hooper
Engineer - Ingleburn-NSW-Australia
July 1, 2010

Yes it is. Normally it is because some solution got under the masking and was not removed during the rinse cycle. The long chrome plating time at temperature will allow an aggressive attack on the metal not being plated.
My experience was a cyanide cleaner or the acid etch.

James Watts
- Navarre, Florida
July 8, 2010

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