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Removing electroless nickel plating from steel
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Are there chemical ways of removing electroless nickel plating from steel?
And are there chemical ways of removing tin plate from steel?
The criteria for either system - must not "poison" the surface nor cause loss of steel. And must be quick.
Is there a dye check that can be used after treatment that will show the complete removal of either plating?
Joe Redinger- Canada
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Cyanide-based strippers are pretty good at complexing other metals while leaving steel untouched. But if you need something cyanide-free, you might want to talk to a specialist in nickel strippers, like Metalx [Lenoir, NC].
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 Ted Mooney, P.E. finishing.com Brick, New Jersey |
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Joe:
You might check with Enthone, they make a line of nickel & E nickel strippers. If I recall correctly it is called "N Strip".
Good Luck
Paul D. Stransky, CEF
- Putnam, Connecticut
For high P EN, I like Metalx's strippers. Work well and tend to be cheaper and less of a pain to dispose.
James Watts- Navarre, Florida
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Please also see our FAQs on Stripping of Electroless Nickel.
Regards,
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 Ted Mooney, P.E. finishing.com Brick, New Jersey |
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This is in response to Mr. Redinger's 1997 letter asking whether there's a dye to check if a steel part has been stripped of Nickel or other plating. I post this message for the curious. Generally in time you'll develop an "eye" for when a part is stripped. However if you simply immerse the part in [sulphuric] acid-copper plating bath (without current) the copper will contact plate to the steel through galvanic action and you'll be able to see any non-stripped areas. You can remove the immersion copper film quickly (a matter of seconds) by swishing the part in your strip bath. Regards, Steve Wilcox
Steve Wilcox- Tecumseh, Michigan