Iron can be prevented from rust not only by painting but also by coating the iron byzinc . But when we paint iron ,the hydrated oxide presented in the rust iron(Fe2O3.2H2O)can be prevented . Reaction of the iron with air ,water Etc can be prevented.
By preventing rusting of iron in bus not being sarcastic at all
zinc prevents rusting of iron by the process galvanisation
by the use of oil
iron grill is painted frequently because it prevent iron from rusting.
rust is caused by the interaction of the iron and the oxygen in the air. when iron is painted, there is a barrier between the iron and oxygen.
Prevents contact of Iron with oxygen and water
Coating prevent the iron from contacting air and moisture. So it prevents iron from rusting.
It decreases rusting but doesn't totally prevent it.
Rusting of iron can be prevented by painting,oiling,greasing,galvanising,chrome plating,anodising or making alloys
to prevent rusting of the iron
By preventing rusting of iron in bus not being sarcastic at all
Iron objects are painted before use to prevent them from rusting. Paint does not let the moisture to get inside it and prevent iron's quality from rusting.
No, after painting iron can not make a strong bonding with concrete, the purpose of painting is the prevention of rusting but rusting process occurs in presence of carbon dioxide and moisture, when iron bars are sealed in concrete the rusting is not possible.
zinc prevents rusting of iron by the process galvanisation
To prevent it from rusting.
by the use of oil
Galvanising or painting both prevent iron from rusting. Painting is less expensive but also less permanent and the treatment needs to be repeated as the paint flakes off.