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Gold plating temperature resistance

What is the maximum temperature that gold plating over nickel plating on a copper base alloy can withstand? Will it withstand 600 deg F for 2 hours?

H. Martin
- Toronto, Ontario

Gold plated components can be heated up to 200-250 °C for 2 hrs .This will increase the adhesion of deposition and also in case of an alloy true color of the deposit can be obtained.

Venkat Raja
- Kitchener, Ontario, Canada

At 600 degrees F. nickel will diffuse into the gold and oxidize in air atmosphere causing discoloration. Also copper will diffuse into the nickel layer. Very thick layers with no pores may withstand the temperature without nickel migrating to the surface, but if continued heating discoloration will occur.

Don Baudrand
Consultant - Poulsbo, Washington
(Don is co-author of "Plating on Plastics"
and "Plating ABS Plastics" eBay or AbeBooks affil links])

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