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Ted Mooney, P.E. RET
Pine Beach, NJ

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Ni plating spot check?

Hello, is there anyone aware of a quick "spot check" for electroless Ni?

Florina Vartolas
Materials Technical Specialist - Auburn Hills, MI, USA
December 1, 2008

First of two simultaneous responses --

A drop of concentrated nitric acid will attack EN and turn its surface black. Conventional electrolytic nickel will show attack but will not blacken. Remember that acids are hazardous and regulated. This test may be destructive to delicate parts or thin plating.

Guillermo Marrufo
Monterrey, NL, Mexico
December 3, 2008

Second of two simultaneous responses --

Test for what?
The spot check for nickel is nitric acid on a cleaned area. Turns green. Try it on a known sample to be sure of what you are looking for. This is a destructive test.

James Watts
- Navarre, Florida
December 3, 2008

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