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topic 9548

Nickel Brush Plate Edge Thickness


Hello Everyone,

I have gotten a 4340 steel RC 42-46 part brush nickel plated by professional contractors, to a max. thickness of 0.005 in., but have experienced several chipping incidents. Many of the failures start at a chamfer, measuring 0.08 in. x 45 degrees. I think that if I change the chamfer to a radius, that it may solve the chipping problem. However, I cannot find minimum edge radius specifications anywhere. Does such a specification exist ? Is there a minimum radius around which brush nickel plating should be applied ?

Any suggestions would be greatly appreciated.

Thank you,

Marc Friedman
- Lakehurst, New Jersey


The MFSA's Quality Metal Finishing Guide recommends a radius of at least 1/64" and preferably 1/32"for decorative copper-nickel-chrome plating; but it doesn't address brush plating. But I don't think the nickel should chip or peel regardless.

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


Just wanted to say thanks to Ted Mooney for the quick response.

Thank you,

Marc Friedman
- Lakehurst, New Jersey, USA


Hello Mark,

Ted mooney is correct. There should be no chipping or peeling from the edge of a brush plated deposit. There are procedures that will enable brush plated deposits to be built well over .005in with no chipping on an edge.

Chris Helwig
- Valencia, California, USA

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