Question

Answer the following :-

a) Why do we paint on the metal articles like staircase, machines and door handles​

Answer 1

Explanation:

coz to prevent them from rusting and corrosion as they get in contact with oxygen present in air and so to prevent rusting and corrosion they are painted

Answer 2

Answer:

Explanation

Since air and water are both required for rust to form, most objects made of ferrous metal (except those that are plated to resist rust or those that are made of a stainless steel alloy) are usually painted or covered with a similar protective coating that will prevent air and water from coming in contact with the surface of the metal. Where painting is impractical, or impossible, a coat of grease, wax, oil or similar material that will keep air and moisture away from the surface is often applied instead.