Painting with red lead – Painting the iron surface with red lead does not allow it to come in contact with moist air and thus prevent rusting. For example, railings, lamp posts and window panes are painted to prevent them from rusting.
Using grease or oil – Metallic tools and machine parts may be coated with a thin layer of grease or oil to prevent them from rusting.
Galvanization – It involves coating iron with a thin layer of zinc to prevent iron from rusting. Articles that are exposed to extreme moiture such as roof sheets, tubs, buckets and water pipes are protected from rusting by galvanization.
Alloying – Iron can be alloyed with chromium and nickel to form stainless steel which is lustrous and corrosion – resistant and is used to make cutting and surgical instruments, utensils, etc.
Tin plating – Iron is coated with a protective layer of tin. Tin is non-toxic and less reactive than iron. Food cans are coated with tin prevent them from rusting.
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