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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Removing electroless Ni from steel

I am trying to remove electroless Nickel coating and Copper strike from steel without corroding steel surface. So far my results are very inconsistent: parts cleaned in the same acid vat never look the same. My acid bath is basically Hydrochloric/Sulfuric acids at 1 to 3 ratio with some surfactants and wetting agents. What am I missing in this process?

Thank you in advance,
Nina

Nina Geller
- Memphis, Tennessee
1999

Nina, You can try the following formulation for your application: Sodium hydroxide 7-9 oz/gal Ethylenediamine 15-17 oz/gal m-Nitrobenzene sulfonic acid 5-7 oz/gal temperature 165-175 F Good luck! Ling

Ling Hao
- Grand Rapids, Michigan
1999

Nina Geller Memphis Tn: I like a product called B-9 By Metalx (Ronatec.us) [a finishing.com supporting advertiser]; across the board its the best that I have used

Chris Snyder
plater - Charlotte, North Carolina
1999

Please also see our FAQs on Stripping of Electroless Nickel.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
1999

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