Question

why it is necessary to anodize aluminum to make it corrosion resistant

Answer 1

ANS: -BECAUSE ALUMINIUM IS REACTIVE METAL. SO GALVINIZATION OF ALUMINIUM USE TO BE DONE

Answer 2

A fairly simple process that's used to protect an aluminum surface from undue damage and wear, anodizing aluminum adds a protective coating of aluminum oxide to the metal itself. The durability and longevity of the finish is in direct correlation to how thick the applied coating actually is.