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The most durable metal plating on iron t...

The most durable metal plating on iron to protect it againt corrosion is

A

nickel plating

B

tin plating

C

copper plating

D

zinc plating

Text Solution

Verified by Experts

The correct Answer is:
D
Zinc is commonly used for covering iron surfaces. The process of covering iron with zinc is called galvanisation. If some scratches occur on the protective zinc film on coated iron, even then iron will not be rusted. This is due to the fact that because of scrathces, both zinc and iron gets exposed to oxidation to iron, because the reduction potential of zinc is less than the reduction potential of iron. So, zinc coating is the best and durable method for protecting of iron.
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