Question

explain how painting of an iron object or Gates prevent it from rusting

Answer 1

Explain how painting of an iron gate preventsit from rusting. Painting of an iron gate prevents it from rusting because it cut the direct contact of iron from the environment and therefore there is no further exposure of iron to oxygen in moisture which is the causes for rusting.

Answer 2

While painting an iron object,it doesn't allow the direct contact of iron with air and water. Since rust is formed due to the reaction of iron with air and water.
Hope it helps..