Explain the term 'Corrosion' with one example.

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(N/A) Corrosion:
Corrosion is defined as a process where materials,usually metals,deteriorate as a result of a chemical reaction with their environment,such as air,moisture,or chemicals.
For example,iron,in the presence of moisture,reacts with oxygen to form hydrated iron oxide.
$4Fe + 3O_2 + nH_2O \to 2Fe_2O_3 \cdot nH_2O$ (Hydrated iron oxide)
This hydrated iron oxide is commonly known as rust.

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