Prevention of rusting of iron

Rusting of iron occurs due to the reaction of iron with oxygen and water in the presence of air. The process of rusting can be prevented by various methods. Some of the methods are:

1. Galvanizing: It is the process of coating iron with a layer of zinc. Zinc is a sacrificial metal, which means that it corrodes first, protecting the iron underneath.

2. Applying grease: Grease can be applied to the surface of iron to prevent water and oxygen from coming into contact with the metal.

3. Painting: Painting the surface of iron with a layer of paint creates a barrier between the metal and the environment, preventing the metal from coming into contact with air and water.

4. Alloying: Alloying iron with other metals like chromium and nickel can improve its resistance to rusting.

Process not helpful in prevention of rusting

The process which is not helpful in the prevention of rusting of iron is alloying. Alloying iron with other metals can improve its resistance to rusting, but it is not a reliable method for preventing rusting. Alloyed iron can still rust if it comes into contact with air and water. Therefore, alloying cannot be relied upon as the sole method for preventing rusting.

Conclusion

In conclusion, rusting of iron can be prevented by various methods, including galvanizing, applying grease, painting, and alloying. However, alloying cannot be relied upon as the sole method for preventing rusting.