Electrochemistry - Result Question 63
####65. The most durable metal plating on iron to protect against corrosion is
[1994]
(a) nickel plating
(b) copper plating
(c) tin plating
(d) zinc plating.
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Solution:
(d) This is because zinc has higher oxidation potential than $Ni, Cu$ and $Sn$.
The process of coating of iron surface with zinc is known as galvanization. Galvanized iron sheets maintain their lustrue due to the formation of protective layer of basic zinc carbonate.
