What are different methods used for prevention of rusting of iron?

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Solution

Rusting of iron takes place when the metal is exposed continuously to atmospheric oxygen and moisture.

Galvanization, painting, and greasing/oiling prevent rusting.
$∙$ The process of coating zinc on the iron metal is called galvanisation. This coating protects it from coming in direct contact with atmospheric oxygen and moisture.
$∙$ Painting the iron metal prevents rusting by cutting off the contact with atmospheric oxygen and moisture.
$∙$ Oiling forms a protective layer on iron metal that helps to prevent rusting by cutting off the contact with atmospheric oxygen and moisture.

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