Which one of the following metals is used to galvanize iron?
(1) Copper
(2) Lead
(3) Zinc
(4) Mercury
Answer: (3) Galvanization) is the process of applying a protective zinc coating to steel or iron in order to prevent rusting. The term is derived from the name of Italian scientist Luigi Galvani. Although galvanization can be done with electrochemical and electro-deposition processes, the most common method in current use is hot-dip galvanization, in which steel parts are submerged in a bath of molten zinc.
