Objet métallique et procédé pour sa fabrication

A metal article or part (e.g. of steel, copper, zinc, aluminium or brass) has bonded to its surface a composite metal coating consisting of alternate layers of nickel each 2.5 to 50 microns thick and of chromium each 0.025 to 2.5 microns thick, there being at least two layers of nickel one of which...

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Bibliographische Detailangaben
Hauptverfasser:	ANDREW WESLEY,WACLAW, BOWER KNAPP,BURTON, JAMES MCKAY,ROBERT
Format:	Patent
Sprache:	fre
Schlagworte:	APPARATUS THEREFOR CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	A metal article or part (e.g. of steel, copper, zinc, aluminium or brass) has bonded to its surface a composite metal coating consisting of alternate layers of nickel each 2.5 to 50 microns thick and of chromium each 0.025 to 2.5 microns thick, there being at least two layers of nickel one of which is the foundation layer, the layers being firmly bonded together and the total thickness of the coatings being at least 6.25 microns. The metals are preferably deposited electrolytically, but chemically deposited nickel coatings such as those described in U.S.A. Specification 2,532,283, coatings produced by high vacuum vaporizing and coatings produced by thermal decomposition of metal carbonyls may be used.