PRODUCTION OF COMPOSITE COATING FILM

PURPOSE:To convert a low-grade material into a corrosion and wear resistant material by thermally spraying an electrically nonconductive material on the surface of the low-grade material and carrying out electroplating with a metal. CONSTITUTION:The surface of a base material 1 such as carbon steel...

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Bibliographische Detailangaben
Hauptverfasser:	TSURU SATOSHI, ARIOKA KOJI, YAMAMOTO TETSUO, KAYANO ISAMU
Format:	Patent
Sprache:	eng
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:	PURPOSE:To convert a low-grade material into a corrosion and wear resistant material by thermally spraying an electrically nonconductive material on the surface of the low-grade material and carrying out electroplating with a metal. CONSTITUTION:The surface of a base material 1 such as carbon steel is roughened and an electrically nonconductive wear resistant material is thermally sprayed on the roughened surface. Fine voids 3 are present in the resulting thermally sprayed layer 2. In order to fill the voids 3, electroplating is carried out with a corrosion resistant metal easily forming a dense layer, e.g. Ni. A dense metal layer is successively grown in the voids 3 from the base material 1 side and the voids 3 are nearly filled with a metal plating layer 4. Since the outermost part of the layer 2 is made of the wear resistant material, wear is inhibited. Since the voids 3 in the layer 2 near the base material 1 are filled with the corrosion resistant metal, the penetration of a corrosive soln. from the outside can be prevented.