Electrochemistry Ques 62
62. 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.
Show Answer
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.
BETA
