Rusting of Iron |  

Rusting of Iron.
When a piece of iron is left out in the open for a while, a film of brownish substance gets deposited on its surface called rust.
Rusting occurs when iron is exposed to oxygen in air and water or water vapor.
Rust is Iron oxide.
Iron plus oxygen plus water vapor gives iron oxide.
In areas that have higher humidity, the rusting process takes place faster as the content of moisture in the air is higher.
This process of rust formation in presence of oxygen and water or water vapor is called rusting.