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why aluminium(Al) is used for packing article as it is a reactive metal

Aluminium is soft, lightweight and ductile with excellent thermal and electrical conductivity. It is highly reactive, though the metal is protected by a surface layer of inert transparent oxide (Al2O3) that forms rapidly in air, providing excellent corrosion resistance. With these properties, and by enhancing its strength by alloying with other metals, aluminium has many applications ranging from cooking foil and utensils, through overhead power cables, to aircraft components.  


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