Iron And Rust

Question 1

Painting or coating with plastic

Answer 1

Forms a barrier that prevents air and water from reaching the surface of the metal

Question 2

Oiling or greasing

Answer 2

Creates a water-repellant layer that stops moisture from contacting the metal

Question 3

Galvanising

Answer 3

Zinc acts as a sacrificial metal, reacting with oxygen and water first to protect the iron underneath. Even if the zinc layer is scratched, the zinc contributes to protect the iron through a process called sacrificial protection.