Question

A coating of zinc is deposited on iron to protect it from __________.

• A. rain
• B. corrosion
• C. sun
• D. none of these

Answer 1

The correct option is B corrosion

Galvanization is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanization, in which parts are submerged in a bath of molten zinc.
Galvanizing protects in two ways:

• it forms a coating of corrosion-resistant zinc which prevents corrosive substances from reaching the more delicate part of the metal.
• 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.

Hence, A coating of zinc is deposited on iron to protect it from corrosion and formation of rust.