Two methods by which rusting of iron can be prevented are _________ and _________.

Rusting:

• Rusting of iron refers to the formation of rust i.e. a mixture of hydrated iron oxide on the surface of iron objects when it comes in contact with the moisture and air.
• It is a chemical change.

The methods by which rusting of iron can be prevented are discussed below:

1. Galvanization:

• Galvanization is a method of protecting steel and iron from rusting by coating them with a thin layer of zinc.
• Even if the zinc coating is broken, the galvanized item is protected against rusting.
• To avoid rusting, the iron pipes that carry water in our homes are galvanized.

2. Painting:

• Painting is the method by which rusting of iron can be prevented.
• It prevents the direct interaction of iron from air and moisture.

Thus, the two methods by which rusting of iron can be prevented are galvanization and painting.