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Help! Gold plating over copper alloy, blister/flaking?

Q. Does anyone recognize the issue here? or what may cause this problem with the plating. The finish has many of these spots that flakes/blisters.

55685-1 55685-2 55685-3 55685-4 55685-5 55685-6

It's gold plating over machined copper alloy (I believe it has a nickel underplating).

Possibly improper cleaning? or trapped salts in the base metal pores?

Any ideas would be highly appreciated.

Thanks!

-Chris

Chris M.
Student - Los Angeles, California, USA
September 4, 2010

A. Have these pins been heat treated? Check cleaning prior to heat treatment.

Andrea Julio
- Cambridge, Ontario, Canada
November 28, 2014

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