Question

what do you mean by protective coating on metal surface? ​

Answer 1

Explanation:

=>Protective coatings are a simple way to reduce corrosion, by limiting the exposure of the metal to a corrosive environment.

A further form of protective coating is to plate a coat of another metal onto the surface of the metal you wish to protect.

Answer 2

Explanation:

We do protective coating on metal surface because to protect it for many years .

For example : On rust we do coating to protect it for many years .