Question

What is done to prevent rusting of the iron door of your house?

Answer 1

To prevent rusting of the iron door of a house, the following methods are used:

1. To fix a layer of some substance on the metal surface so that the contact of the metal with moisture and oxygen in the air is prevented and no reaction would occur between them.
2. To prevent corrosion of metals by applying a layer of paint, oil, grease or varnish on their surface. For example, corrosion of iron can be prevented by this method.