question_answer

Corrosion is a serious problem. Every year an enormous amount of money is spent to replace damaged iron. What steps can be taken to prevent this damage?                                                                                                     

Answer:

The wasting of iron objects due to rusting causes a big loss to the country's economy/ so it must be prevented by following methods:

(i) By painting: Paint is applied to the surface of an iron object, then air and moisture cannot come in contact of iron and hence no rusting occurs.

(ii) By applying grease or oil: Tools and machine parts made of iron and steel are smeared with grease or oil to prevent their rusting.

(iii) By galvanization: Galvanization is done by dipping an iron object in molten zinc metal. This thin layer of zinc metal on the surface of iron objects protects them from rusting.

(iv) By tin plating and chromium-plating: When a thin layer of tin metal is deposited on iron and steel objects by electroplating then the iron and steel objects are protected from rusting.

(v) By allowing it to make stainless steel: When iron is alloyed with chromium and nickel, stainless steel is obtained/ which does not rust at all.