finishing.com -- The Home Page of the Finishing Industry

-----

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
Ted is available for instant help
or longer-term assistance.
1999

No dead threads! If this page isn't already on the Hotline your Q, A, or Comment will move it there.

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: