Question

During galvanization iron metal is given a coating of the metal
a) chromium
b) scandium
c) zinc
d) copper​

Answer 1

Galvanisation is a process that involves dipping of iron objects into melted zinc. This gives a thin coating of zinc layer on the iron object that protects it from corrosion. Zinc, being a highly reactive metal, forms a thin layer of zinc oxide, which prevents iron from getting exposed to the atmospheric air.

Answer 2

Answer:

c) zinc

Explanation:

It forms a barrier that prevents corrosive substances from reaching the underlying steel or iron. The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc. The zinc protects its base metal by corroding before iron.

Since Zinc is more reactive than iron, the coated surface of zinc on iron or steel reacts with oxygen in the atmosphere to form a layer of zinc oxide which protects the zinc surface from further moisture reaction and attacks and hence they protect iron from rusting.