What is corrosion ?

Explanation

The process in which a metal is destroyed gradually by the action of air, moisture or a chemical (like an acid) on its surface is called corrosion .
Corrosion is degradation of a material due to reaction with its environment .
The major problem oc crrosion occurs with iron, as it is used as a structural material in contruction bridges, ship buidling .
THe gets covered by reddish brown flakes when exposed to atmosphere. This is an example of corrosion .