Why is zinc metal used for galvanization?

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Zinc get corroded more easily than iron

Zinc does not corrode

Corrosion constant of iron increase

All of the above

answer is B.

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Detailed Solution

Concept- Because it oxidises and is vulnerable to acid corrosion when in contact with steel, zinc is employed in the galvanising process rather than other metals. This implies that when zinc and steel come into touch, oxygen and acids will damage the zinc instead of the steel below.
Additionally, a protective layer of zinc that is impervious to corrosion is formed on a steel construction member or steel component by the production of an alloy of zinc and steel in the high heat of a galvanising pot. Galvanizing originated from several findings made regarding how metals conduct electricity. Different metals have different electrical conductivities.
This is due to the fact that they surrender electrons to the movement of electrical current more readily than others. Galvanization is applying a protective layer of zinc. A thin layer of zinc metal on the surface of iron metal objects protects them from rusting because zinc metal does not corrode on exposure to air.
Hence, the correct answer is option 2.

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