Question

Why is an iron grill painted freqently?

Answer 1

an iron grill painted frequently to prevent for rusting.
iron can rust up the metal due to which iron grill painted frequently to prevent its contact from oxygen present it the air.

Answer 2

Explanation:

All elements can be classified as non-metals and metals.

Metals are very reactive elements which usually exist in a solid state such as iron, copper, aluminum, etc. These metals readily react with atmospheric oxygen and moisture to form metal oxide. This process is called as corrosion. It mainly deteriorates the metal surface as it converts the metal to metal oxide.

For example, iron of iron grill changes to red color iron oxide. Therefore, they must be painted frequently to avoid the corrosion.