PROPERTIES OF ALUMINIUM

Corrosion resistance

Aluminium forms a natural oxide protective layer on contact with air. After each removal, this layer renews itself, resulting in excellent resistance to atmospheric corrosion exposure. Pure and ultra-pure aluminium, including the copper-free alloys, are resistant to very many media. They are therefore used extensively in construction, the chemical industry, the food and luxury food industry and in vehicle construction.

However, the materials with the highest strengths - over 500 N/mm2 - show very limited resistance. This is taken into account by constructive measures.