Question

what is galvanization​

Answer 1

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Hot-dip galvanizing deposits a thick, robust layer of zinc iron alloys on the surface of a steel item. In the case of automobile bodies, where additional decorative coatings of paint will be applied, a thinner form of galvanizing is applied by electrogalvanizing. The hot-dip process generally does not reduce strength on a measurable scale,[citation needed] with the exception of high-strength steels (>1100 MPa) where hydrogen embrittlement can become a problem.This deficiency is a consideration affecting the manufacture of wire rope and other highly stressed products.

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Answer 2

Galvanization is the process of coating a layer of copper over iron to protect it from rusting.

As copper is less reactive than iron, it gets coated over iron.