Question

(a) Define Rusting (b) Why do you apply paint an iron articles?

Answer 1

First, iron is a metal. Metals rust when they come in contact with oxygen or moisture. Usually to prevent rusting, metals are coated with enamel paints or are galvanized (coat iron or steel) with a protective layer of zinc. They can also be coated with oil or grease. 

Answer 2

Answer:

Explanation:

(i) No, we cannot protect the articles permanently

from rusting by painting on them.

(ii) The method of painting is suitable for short time.

(iii) If there is a scratch on the paint on the surface

of the article and if a small surface of the metal

comes in contact with air, the process of rusting

starts below the layer of the paint.