How is corrosion different from rusting

Corrosion

Rust

Corrosion is the process of deterioration of materials as a result of chemical, electrochemical or other reactions.

Rusting is a part of corrosion and is a chemical process which results in the formation of red or orange coating on the surface of metals.

Corrosion can occur on different surfaces such as skin, wood, metals, etc.

Rusting usually occurs on surfaces of iron and its alloys.

Corrosion can occur when the substance is exposed to air or some chemicals.

Rusting mainly occurs when a metal is exposed to air and moisture.

Corrosion results in the formation of the oxides of metal or salts.

Only iron oxide is formed when rusting takes place.

Corrosion can occur in materials like polymers and ceramics and this type is known as degradation.

Rust or rusting can affect only iron and its alloys.