Should aluminium be used in place of iron to prevent losses due to rusting of iron? Give 4 points each in its favour as well as against it.

Asked by Kalita Padmanath | 11th Jul, 2015, 10:36: AM

Expert Answer:

Some properties of iron and aluminium are as follows:

Property

Aluminium

Iron

Magnetic Yes or No

No

Yes

Density

Low

High

Corrodes easily Yes or No

No

Yes

Advantages of using Aluminium in place of Iron:

  • On the basis of above summary, we can say that if aluminium is used in place of iron for example in making cars, then due to low density, the cars will be lighter and hence will become more fuel efficient.
  • Aluminium is more abundant than iron.
  • In case lightness of the material is the main criteria, then aluminium is preferable over iron.
  • Aluminium is a better conductor of electricity.
  • Aluminium is more ductile than Iron.

Disadvantages of using Aluminium in place of Iron:

  • Aluminium is costlier than iron, hence the cars will be expensive.
  • Extraction of aluminium is expensive than iron.
  • Iron welding is easier, while aluminium welding is difficult due to softness of aluminium wires.
  • As F=ma, force is directly proportional to mass. Hence wherever more force is required, iron is preferable over aluminium.  
  • Iron is magnetic while aluminium is non-magnetic. When this property is required, iron is preferable over aluminium.
  • Iron has a higher boiling and melting point than Aluminium.



 

Answered by Prachi Sawant | 11th Jul, 2015, 06:26: PM