Method for coating metallic surfaces for preventing pinholes on zinc-containing metal surfaces

The invention relates to the use of a silane additive in an aqueous cleaning composition, in an aqueous rinsing liquid or/and in an aqueous activation composition for preventing pinholes on zinc-containing metal surfaces. According to the invention, the silane content in at least one of said aqueous...

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Bibliographische Detailangaben
Hauptverfasser:	MRO MARTIN, SPECHT JURGEN, WIETZORECK HARDY, DAHLENBURG OLAF
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS 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 invention relates to the use of a silane additive in an aqueous cleaning composition, in an aqueous rinsing liquid or/and in an aqueous activation composition for preventing pinholes on zinc-containing metal surfaces. According to the invention, the silane content in at least one of said aqueous compositions is in the range of 0.001 to 5g/l.