The rusting process:
The rusting process starts off when a metal is exposed to oxygen (air) and iron it usually occurs when there is moisture in the air. Given time iron, oxygen and water react together and forms rust that is a red colour the metal usually disintegrates after a while. Rusting is a common word for corrosion, rust can be prevented by plastic sheeting over the metal to stop oxygen and water/moisture from making contact with the metal. Rust can form on tools and metal objects and is very rough and crusty.