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Tin over zinc plating

Would like to know the comparison of Tin plating on Copper against Zinc plating in mechanical and electrical characteristics

The question is: Comparison of Tin plating over Zinc plating over copper for connector , d-sub, electrical terminal contact portion. Is Zinc plating better than Tin in certain aspect? or any other advises you have?

Regards!

Alan Lim
Industrial Supplies - Singapore

Zinc plating is a sacrificial coating, designed to corrode. It is not a suitable contact material.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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You do not plate tin over zinc as it is porous. You do not even plate tin on brass. You need an underlayer of copper or nickel.

Sara Michaeli
Tel-Aviv-Yafo, Israel

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