Question

Explain how painting a metal prevents it from corrosion

Answer 1

Painting a metal, makes a thick layer in between the metal and air, and cut the contact between metal and oxygen in air. This prevent iron from getting oxidise and rust. And we all know rusted metal looses it's tensile strength.
Toss is how painting a thick layer over a metal prevent it from corrosion/rust

Answer 2

Answer:

Painting a metal makes a thick layer between the metal and air so that is why painting prevent metal from corrosion