Question

 What do you mean by corrosion? How can you prevent it?

Answer 1

Corrosion is the gradual destruction of materials by chemical reaction with the environment.It can be prevented by galvanisation.

Answer 2

corrosion is the gradual destruction of materials (usually metals) by chemical reaction with its environment.

prevention of corrosion:
                           corrosion can be prevented by endowing the metal to be protected with a negative charge.