Essentially chromium-free method for passivating metallic surfaces consisting of Zn, Zn alloys, Al or Al alloys

The invention relates to an essentially chromium-free method for passivating metallic surfaces consisting of Zn, Zn alloys, Al or Al alloys, by treating the surface with an acid, aqueous preparation containing at least one essentially non-crosslinked, water-soluble polymer or copolymer comprising at...

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Bibliographische Detailangaben
1. Verfasser:	DIETSCHE FRANK,KLIPPEL FRANK,KLUEGLEIN MATTHIAS,GOETHLICH ALEXANDER
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES 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 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 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 an essentially chromium-free method for passivating metallic surfaces consisting of Zn, Zn alloys, Al or Al alloys, by treating the surface with an acid, aqueous preparation containing at least one essentially non-crosslinked, water-soluble polymer or copolymer comprising at least 50 wt. % of (meth)acrylic acid units, and further treatment of the surface by means of at least one water-soluble crosslinking agent comprising at least two crosslinking groups selected from the azirane, oxirane or thiirane groups. The invention also relates to passivation layers that can be obtained by means of the cited method, and to a preparation suitable for said method.