plating, anodizing, & finishing Q&As since 1989
Electrolytic stripping of electroless nickel-phosphorus coating
Does anyone have a formula for the electrolytic stripping of an electroless nickel-phosphorus coating?warren silverman
- brooklyn ny
Please see our FAQs on Stripping of Electroless Nickel.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
My guess is that electrolytic stripping would needlessly etch the part that is probably being deposited with electroless nickel because there are precision tolerances which have been machined on it. I'd check out Metex non-cyanide processes or look into Meta-nitrobezoic acid (MNBA) I know that electrolytic stripping was accomplished using sulfuric acid, and in order to stop the etching the 'old tyme' platers put glycerine in it. But I'd still be wary of this.
Also from my experience with electroless nickel there is a black smut which develops on the part (as it strips) maybe an oxide of phosphorus?, put on rubber gloves [on eBay or Amazon affil links] and wipe or brush the part to accelerate the stripping time. Sincerely Steve Wilcox
- Tecumseh, Michigan
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