Question

22.
Name the method which is not applicable for the corrosion of metals.
A Galvanisation
(2) Metal coating
(3) Powder coating
(4) Dip in water
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Answer 1

Answer:

i think the question is to prevent the corrosion of metal

for that dipping in water is not suitable method

because it will cause corrosion as dissolved oxygen is there

Answer 2

Answer:

Answer to the question is powder coating