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topic 0175

Experiences with black nickel plating

A discussion started in 1996 and continuing through 2008.
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Lately we have had several requests in our shop for "black nickel". I understand that this can be accomplished in an EN bath during a post plate process, using a common EN strip, or even nitric acid. Anyone have suggestions, experience, with this process? Is the application functional or simply aesthetic? -- Jim



A black nickel coating is usually accomplished by electro- rather than electroless deposition. The best known bath forms a Zn-Ni deposit that is very thin (1-2 micrometers, if memory serves) and black in color. The protective value of these coatings is minimal, they are mostly used for decorative and functional (solar energy heat exchangers) applications over a protective layer of nickel or nickel-copper.  

berl stein
berl sig
"PlaterB" Berl Stein
NiCoForm, Inc.
supporting advertiser
Rochester, New York


November 21, 2008

Good point, Berl. Thanks. letter 7077 also talks about black nickel plating.


Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

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