State two ways to prevent the rusting of iron.
Answer
Rusting of iron can be prevented by :
(1) Galvanization
- In galvanisation, a sacrificial coating of zinc is applied on iron and steel .
- Since Zn is more reactive than Iron, the Zn coating reacts with the surroundings, leaving the Iron untouched.
It prevents steel and iron from rusting .
(2) Alloying
An alloy is a homogeneous mixture of 2 or more metals. In alloying ,a metal is mixed with some metal or nonmetal. This changes the properties of the metal .
Example
When iron is mixed with Nickel and chromium , we get stainless steel . This prevents corrosion as iron rusts but stainless steel does not.
