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Protection from oxidation

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Protection from oxidation

Because of its high specific weight as compared with air, argon is used to create barriers or superficial protective layers to prevent the contact of atmospheric oxygen with molten metals and this drastically reduces losses by oxidation. Particular application areas are the manufacture of alloys of the noble metals (gold and silver), the melting of tin and zinc, the melting of high magnesium content aluminium alloys and the melting of special alloy steels to avoid oxidation of their alloying elements (Cr, Mo and Ti).