Question

Answer the question in at least $50$ words.
Mentioning the reasons for metallic corrosion describe the remedies to prevent it?

Answer 1

In corrosion, metal is converted to its oxide, hydroxide, or sulfide. It gradually destroys metals by chemical and/or electrochemical reaction.
The remedies to prevent metallic corrosion:
1) Protective Coating: It involves coating metal surface by paint.
2) Cathodic Protection: More easily oxidized metal is attached to the metal to be protected from corrosion.
3) Galvanizing: Iron is coated with another metal such as zinc. Zinc undergoes corrosion preferentially whereas iron is protected from corrosion.
4) Passivation: the Metal surface is made inactive by treatment with nitric acid (strong oxidizing agent). The thin oxide layer is formed on a metal surface.
5) Alloy formation: Alloy of iron is made with other metals. It reduces the tendency of iron to be oxidized.