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topic 1959

Plating Electroless Nickel onto a Silver Substrate


(1998)

Can anybody tell me if electroless nickel can be plated on silver substrate? Is any pre-treatment necessary to condition silver before immersing the sample in electroless nickel/phosphorous solution?

Thanks a lot for your attention.

Madhhumita Datta
Laboratory of Physical Sciences - College Park, MD


(1998)

A normal prep cycle for silver will do. EN will not plate, without help, onto silver. A palladium immersion coat will work. More practical is a nickel strike and rapidly rinse and get into the EN, or put the prepped part into the EN and make the part cathodic for a few seconds with some type of anode in the tank that you remove after the EN kicks off.

Lowenheim's Modern Electroplating has a few sentences on it.

Most other references have nothing.

Not many people would have a need for EN over silver.

James Watts
- Navarre, Florida


(1998)

Acidic hypo EN does not work on Ag, but ammonia hypo EN does. Substrate surface should be polished, or degreased and soaked in a thiourea-type lightener. Rinse with DI water and plate immediately.

Alex Kozlov
- New Jersey



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