Concept:Galvanization is a method of applying a protective zinc coating to iron or steel to prevent rusting.
Explanation:Iron reacts easily with oxygen and moisture in the air, leading to corrosion, commonly known as rust.
Galvanizing involves coating the iron surface with a layer of zinc.
Zinc acts as a sacrificial metal because it is more reactive than iron.
When the iron is exposed to corrosive conditions, the zinc corrodes first instead of the iron underneath.
This protective zinc layer also acts as a physical barrier, keeping moisture and oxygen away from the iron surface.
Therefore, the main purpose of galvanizing iron is to protect it from corrosion.
Making iron more malleable is not the purpose of galvanization.
Removing impurities is done through refining, not galvanizing.
Zinc does not render iron passive in the chemical sense of passivation.
Thus, the correct option is protection against corrosion.
Answer:C. Protect it against corrosion.