Method of producing workpieces of non-corrosion-resistant metals with wear-resistant coatings and articles
AssigneeDegussa AG
InventorsHeinz-Guenther Schenzel, Thomas Engert
Life of this patent
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Abstract
Workpieces of non-corrosion-resistant metals are provided with a wear-resistant, non-metallic layer of a nitride, carbide, boride, oxide or silicide of an element of the fourth to the sixth subgroup applied by PVD (physical vapor deposition) after a corrosion-resistant intermediate layer had been previously applied. An intermediate layer consisting of a copper-tin alloy with 45 to 80% copper, 10 to 55% tin and 0 to 15% zinc proved to be corrosion-resistant and noble and in addition does not cause any skin allergy.
Claims14
A method of producing a workpiece or object fabricated of a metal, metal alloy or mixture thereof, said method comprising galvanically applying to a surface of said workpiece or object an intermediate layer of a copper-tin alloy consisting essentially of 45 to 80% by weight copper, 10 to 55% by weight tin, and 0 to 15% by weight zinc, and subsequently applying thereto a non-metallic coating of a member selected from the group consisting of a nitride, carbide, boride, oxide or silicide of an element of the fourth to the sixth b subgroup of the Periodic Table of Elements, and mixtures thereof, in which said intermediate layer is arranged between said surface of said workpiece or object and said non-metallic coating.
Dependencies are inferred from the claim text.