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Zinc Plating over Black Oxide

We have some small parts that have been black oxided. Our customer just changed the spec to yellow zinc plating 5-15 microns. Is it possible to zinc plate on top of black oxide?

Thanks

Andy Binford
VP - Engineering - Indianapolis, Indiana, USA
September 20, 2011

No, you can't plate "over" black oxide, but the pretreatment process for zinc plating will easily remove the black oxide and the parts can be zinc plated.

Jeffrey Holmes, CEF
Spartanburg, South Carolina
First of two simultaneous responses -- September 21, 2011

Second of two simultaneous responses -- September 22, 2011

Dear Andy Binford,
I think instead of Black oxide, You need to do the Zinc plating of 5-15 microns.
I don't think you need to do the Zinc plating on Black oxide.
Please re-conform with your customer.

Kannan Boopathi
- Salem, TamilNadu, India

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