What is corrosion of metal? Give its characterization and damage.

(N/A) Corrosion is the process where the surface of metallic objects is slowly coated with oxides or other salts of the metal. In this process,a metal is oxidized by the loss of electrons to oxygen,leading to the formation of metal oxides.
Characterization of metal corrosion:
$(i)$ The rusting of iron.
$(ii)$ The tarnishing of silver.
$(iii)$ The development of a green coating on copper and bronze.
Damage due to corrosion:
Corrosion causes enormous economic loss every year. It results in significant structural damage to buildings,bridges,ships,and all objects made of metals,especially those made of iron.