METHOD FOR TREATING A SPECIFIC METAL PART TO ENHANCE THE CORROSION RESISTANCE THEREOF AND THE ADHESION PROPERTIES THEREOF WITH RESPECT TO A COATING COMPOSITION SUCH AS A PAINT

The invention relates to a method for treating a metal part made of at least one metallic element selected from aluminium, titanium, magnesium and alloys thereof so as to endow the part with protection from corrosion and with properties of adhesion to a coating composition, said method comprising in...

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Bibliographische Detailangaben
Hauptverfasser:	CHARRIER, Gaëlle, DENIAU, Guy, DOUBLET, Aurélien, CORNUT, Renaud
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES APPARATUS THEREFOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMICAL PAINT OR INK REMOVERS 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 COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CORRECTING FLUIDS DIFFUSION TREATMENT OF METALLIC MATERIAL DYES ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FILLING PASTES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SPRAYING OR ATOMISING IN GENERAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention relates to a method for treating a metal part made of at least one metallic element selected from aluminium, titanium, magnesium and alloys thereof so as to endow the part with protection from corrosion and with properties of adhesion to a coating composition, said method comprising in succession the following steps: a) a step of forming an organic film on the part by reduction of at least one aryldiazonium salt; b) a step of forming an oxide layer on the part resulting from step a) by subjecting it to anodizing or to a chemical conversion without hexavalent chromium. L'invention se rapporte à un procédé de traitement d'une pièce métallique en au moins un élément métallique choisi parmi l'aluminium, le titane, le magnésium et les alliages de ceux-ci en vue de conférer à la pièce une protection contre la corrosion et des propriétés d'adhérence vis-à-vis d'une composition de revêtement, ledit procédé comprenant successivement les étapes suivantes: a) une étape de formation sur la pièce d'un film organique par réduction d'au moins un sel d'aryldiazonium; b) une étape de formation d'une couche d'oxyde sur la pièce issue de l'étape a) par soumission de celle-ci à une anodisation ou à une conversion chimique sans chrome hexavalent.