Blackening Nickel Plated Items
A discussion started in 2006 but continuing through 20182006
Q. I have some nickel plated items I would like to blacken. Any suggestions. I know nickel is pretty resistant to oxidation.Steve Krevek
plating - Bismarck, North Dakota, USA
A. Immersion in 50% nitric acid, warm (say 120 °F) for 10-20 seconds will blacken nickel.
Jeffrey Holmes, CEF
Spartanburg, South Carolina
A. Oil it very very sparingly with Linseed Oil [linked by editor to product info at Rockler] (or any other edible oil or fat), then heat it slowly to 400 °C. Repeat if needed. Instead of oil you can use 20% shellac solution.Good luck!Goran Budija
- Zagreb, Croatia
August 23, 2018 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread
Q. I currently procure a cable strain relief that is made from nickel plated brass. I am required to blacken this part. Does anyone know of a good process for this. I was told that I should try black zinc coat, but this might oxidize quickly as this part will be mostly used outdoors.carlos santos
- Billerica, Massachusetts
A. Hi Carlos. I think the most robust solution would probably be either black chrome plating or black electroless nickel plating.
You will be plating onto articles which have weeks-old or years-old nickel plating on them, which will be very passive. You can try activating it with a Wood's Nickel Strike before plating ... but definitely run samples before committing to the process. Good luck.
Ted Mooney, P.E. RET
Pine Beach, New Jersey
Striving to live "Aloha"
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