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topic 11919

AgNi plating over Cu base metal


Dear Sir,

Our company is using Ag/Ni (99%/0.7%) plating for our commutator which is made of Cu material. We used Aluminium oxide (Al2O3) to polish the commutator after plating. We realized that some commutators (with plating) after polishing, the AgNi plating started to chip off, leaving pores and cavities.

Is there any ways we can avoid this problems from arising? What can we do to ensure a smooth surface after polishing? Y

our advice is greatly appreciated.


Sam Zaw
- Singapore


What type of nickel are you using? What is your prep cycle? Electroless nickel will chip at part edges when plated thick because it's a brittle material.

Michael Brewington
Fin-Tec, Inc. - Salisbury, Maryland, USA

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