"METHOD FOR FORMING A PROTECTIVE COATING CONTAINING ALUMINIUM ON THE SURFACE OF A METAL PART"

The present invention relates to a method for forming a protective coating containing aluminum on the Surface of a metal part wherein said part is contacted with a carburizer made of an aluminum alloy, at a treatment temperature and in a chamber, the atmosphere of which contains an active gas which...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JEROME BROSSIER, ANNIE PASQUET, PIERRE JOSSO, SERGE NAVEOS, MARIE-PIERRE BACOS, JUSTINE MENUEY
Format:	Patent
Sprache:	eng
Schlagworte:	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 INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	The present invention relates to a method for forming a protective coating containing aluminum on the Surface of a metal part wherein said part is contacted with a carburizer made of an aluminum alloy, at a treatment temperature and in a chamber, the atmosphere of which contains an active gas which reacts with the carburizer to form a gaseous aluminum hulide, which decomposes upon contacting the part while depositing aluminum metal thereon. The method is characterized in that the aluminum alloy of the carburizcr includes at least one element, zirconium and/or hafnium, the active gas reacting with the carburizcr to also form a halide of the reactive element which decomposes upon contacting the part while depositing said element thereon at the same time as the aluminum.