Question

wHat is corrosion why aluminium sheets do not corrodr rasly

Answer 1

corrosion is a electroplated thin layer that resists metals from beings corrode. aluminium sheets do not corrode because they are electroplated with thin layer of corrosion and having shining appearance which resists scrathes and prevent it from corrode

Answer 2

Corrosion is a natural process which converts a refined metal to more chemically stable form such as it's oxide or hydroxide.
Aluminium do not corrode easily Due to the formation of a dull layer of aluminium oxide on exposure to moist air