Method for coating metallic surfaces with nanocrystalline zinc oxide layers, aqueous compositions therefor and use of the surfaces coated in this way

The invention relates to a method for coating metallic surfaces with an aqueous composition, which contains an aqueous solution of a zinc salt, by flooding, spraying and/or immersion, characterized in that, for spraying or immersion, the initial temperature of the substrate lies in the range from 5...

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Bibliographische Detailangaben
Hauptverfasser:	OZCAN OZLEM, GRUNDMEIER GUIDO, SCHUBACH PETER
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES 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 COMPOUNDS THEREOF CORRECTING FLUIDS DIFFUSION TREATMENT OF METALLIC MATERIAL DYES FILLING PASTES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INKS INORGANIC CHEMISTRY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-METALLIC ELEMENTS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention relates to a method for coating metallic surfaces with an aqueous composition, which contains an aqueous solution of a zinc salt, by flooding, spraying and/or immersion, characterized in that, for spraying or immersion, the initial temperature of the substrate lies in the range from 5 to 400 DEG C, in that, for flooding, the initial temperature of the substrate lies in the range from 100 to 400 DEG C and in that an anticorrosive nanocrystalline zinc oxide layer is formed on the metallic surface. The invention also relates to the corresponding aqueous composition, the nanocrystalline zinc oxide layer and the use of the coated substrates.