(b) In construction work, why is the alloy of
aluminium-duralumin used rather than pure
aluminium ?
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In construction work, duralumin is used rather than pure aluminium due to following reasons:
(a) Aluminium is light and not strong but duralumin is light and strong.
(b) Aluminium is attacked by moist air whereas duralumin is unaffected by moist air.
(c) Aluminium undergo corrosion whereas duralumin is corrosion resistant.(d) Aluminium has low tensile strength whereas duralumin has high tensile strength.
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