Question

Explain the following:

In construction work, why is the alloy of aluminium-duralumin used rather than pure aluminium?

Answer 1

In construction work, the alloy of aluminium-duralumin is used rather than pure aluminium because of the following reasons:

1. Duralumin is light and strong, but aluminium is light and not strong.
2. Duralumin is unaffected by moist air, while aluminium is affected by moist air.
3. Duralumin is corrosion-resistant, while aluminium can undergo corrosion.
4. Duralumin has a high tensile strength, while aluminium has a low one.