Question

define rusting . how it can be prevented

Answer 1

Rust is a form of iron oxide. It occurs when iron combines with the oxygen in the air causing it to corrode. 

prevention:
1)By painting
2)BY applying grease or oil.
3)By galvanisation:The process of depositing a thin layer of zinc metal on iron.
4)By tin plating and chromium plating.
5)By alloying it

Answer 2

rusting can be defined as decay of the metal
it can be prevented by
1 oiling the metal
2 alloying
3 painting
4 electroplating
5 glavanisation