Answers

2015-12-31T11:08:35+05:30
1.It forms a coating of corrosion-resistant zinc which prevents corrosive substances from reaching the more delicate part of the metal.
2.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.
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2015-12-31T12:19:20+05:30
To prevent from getting exposed and so that is doesn't react

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