Clad aluminum

A sheet of aluminum alloy which has a coating of pure aluminum rolled on one or both of its sides. Aluminum alloys corrode easily, but pure aluminum does not. By rolling a thin coating of pure aluminum onto the surface of an alloy sheet, the high strength of the alloy and the corrosion resistance of pure aluminum may be combined. Because the pure aluminum coating is weaker than the alloy sheet, cladding slightly reduces the strength of the material.