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Black Zinc-Iron plated decorative steel parts

I've read that a Zinc-Iron plated parts will not have a consistent look and may not be a be a good choice for semi-decorative furniture parts. We've been black Zinc plating parts in the past but have had some issues with some part lots tending to discolor with UV. Will zinc-Iron have the same appearance as black zinc? What are the reasons some Black Zinc lots don't discolor as fast as others? I imagine it has to do with the silver content.

Scott Williamson
product designer - Rochester, Minnesota
September 30, 2011

Hello,

Zinc Iron will not discolor as quickly as Zinc Black does; but it will get duller over time.
A duplex coating over The Zinc Iron that has acrylic in it instead of an epoxy-polymer will increase the durability of the Zinc Iron. This is applied by most platers if you look around.

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

October 9, 2011

What is percentage or say ppm of iron you keep in the bath?

T.K. Mohan
plating process supplier - Mumbai, India
November 28, 2011

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