STEEL SHEET COATED WITH WATER-SOLUBLE RESIN CONTAINING INORGANIC PHOSPHATE AND HAVING SUPERIOR PRESS WORKABILITY AND CORROSION RESISTANCE

PROBLEM TO BE SOLVED: To provide a steel sheet showing superior press workability and corrosion resistance by rationally combining the surface roughness of a steel sheet, an applying quantity of a coating material for forming a water-soluble resin film containing an inorganic phosphate on the surfac...

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Bibliographische Detailangaben
Hauptverfasser:	HAYASHIDA TERUKI, OBARA MASAHIRO
Format:	Patent
Sprache:	eng
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 LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY PERFORMING OPERATIONS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a steel sheet showing superior press workability and corrosion resistance by rationally combining the surface roughness of a steel sheet, an applying quantity of a coating material for forming a water-soluble resin film containing an inorganic phosphate on the surface of the steel sheet, and a composition ratio of the coating material. SOLUTION: The steel sheet coated with the water soluble resin containing the inorganic phosphate and having the superior press workability and corrosion resistance is made by directly applying an inorganic-phosphate-containing resin which contains an inorganic phosphate compound and colloidal silica in an amount of 0.8 to 4.5 g/m2, on the steel sheet having the surface roughness (Ra) of 1.2 to 3.0μm after having been pickled. The inorganic-phosphate-containing resin coated on the steel sheet preferably includes 40 to 65 pts.wt. inorganic phosphate compound and 30 to 55 pts.wt. colloidal silica with respect to 100 pts.wt. organic resin. COPYRIGHT: (C)2005,JPO&NCIPI