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topic 12116

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?


Alan Lim
Industrial Supplies - Singapore


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

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


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
sara michaeli signature 
Sara Michaeli
chemical process supplier
Tel-Aviv, Israel

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