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Nickel is used as a coating metal for corrosion protection ("nickel plating") of metal objects: Because of its protective properties against oxidation, metals (in particular iron) are coated with a nickel layer by means of galvanic technology for certain technical purposes. Nickel is an important alloying metal which is mainly used for steel finishing. It makes steel resistant to corrosion and increases its hardness, toughness and ductility.

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