SURFACE TREATMENT SOLUTION FOR PLATED STEEL SHEET TO BE HOT PRESSED

The present invention is a surface treatment liquid with excellent storage stability and is able to provide a surface-treated steel sheet for which the treatment coating formed has excellent water resistance, solvent resistance, adhesion to plated steel sheets, and hot lubricity as well as chemical...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MIZUNO, KENSUKE, FUJITA, SOSHI, KODAMA, TAKAHIRO, MAKI, JUN, KUROSAKI, MASAO, SUZUKI, TATSUYA, KOZAKI, TAKUMI, YAMANAKA, SHINTARO
Format:	Patent
Sprache:	eng ; fre
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 MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PUNCHING METAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	The present invention is a surface treatment liquid with excellent storage stability and is able to provide a surface-treated steel sheet for which the treatment coating formed has excellent water resistance, solvent resistance, adhesion to plated steel sheets, and hot lubricity as well as chemical conversion treatability after hot-pressing, corrosion resistance after coating, and spot weldability. The surface treatment liquid for a plated steel sheet that is to be hot-pressed comprises an aqueous ZnO dispersion (A) and a water-dispersible organic resin (B). The aqueous ZnO dispersion (A) comprises water and ZnO particles, the particle diameter of which is 50-300 nm. The water-dispersible organic resin (B) has an acid value of 5-45 mg KOH/g and 5-300 nm emulsion particle diameter. The mass ratio (WA/WB) of the mass (WA) of ZnO particles in the aqueous ZnO dispersion to the mass (WB) of solids of the water-dispersible organic resin is 30/70 to 95/5.