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Zinc Alloy Plating

How do the zinc alloy plating systems Zn/Fe, Zn/Co, Zn/Ni and Zn/Sn compare with respect to corrosion resistance?

Eric Gough
- Corsham, Wiltshire, UK

It is quite complicated, depending upon the application, so I would contact the vendors of proprietary plating solutions, and ask how their formulations compare. Even plating from the alkaline or acid bath will give you alloys with different properties.

A review of the literature will show several articles that study the differences.

Tom Pullizzi
Falls Township, Pennsylvania

Dear Mr Eric,

Mr Pullizzi is right, I do three of these except Zinc-tin and don't know.

The Champ No 1 is: Zn-Ni
Runner up No 2 is: Zn-Fe
A poor Fourth is: Zn-Co.

Note : I use Acid zinc cobalt so it wouldn't qualify for third place, I don't know about the Alkaline.

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

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