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Electroless nickel plating on a yellow chromated detail

Is it possible and suitable to use electroless nickel plating on a detail that has already been yellow chromated? The detail is a screw UNC7/8x8" to be more exact.

Best regards,

Cecilia Vinghammar
- Falun, Sweden
2002

First of two simultaneous responses --

It is veasy to strip the chromate and the zinc coating. Then you can plate the item. I would not even consider the possibility of putting the electroless nickel on top of the zinc chromate.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.
2002

Second of two simultaneous responses --

Cecilia,

The screw is already plated with zinc and yellow chromate. You must stripped the screw first from zinc, and after that plate with electroless nickel.

Regards,

Anders Sundman
4th Generation Surface Engineering
Consultant - Arvika,
Sweden
2002

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