METHOD FOR COATING METAL MATERIAL

PROBLEM TO BE SOLVED: To provide a coating method, which generates little environment problem such as waste water treatment, and can improve corrosion resistance of a metal material coated with water paint. SOLUTION: This coating method comprises subjecting a metal material to normal pretreatment su...

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Bibliographische Detailangaben
Hauptverfasser:	YAMANE TASUKU, MASADA KEIJI, OTSU TAKAHITO
Format:	Patent
Sprache:	eng
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL 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 METALLURGY PERFORMING OPERATIONS 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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a coating method, which generates little environment problem such as waste water treatment, and can improve corrosion resistance of a metal material coated with water paint. SOLUTION: This coating method comprises subjecting a metal material to normal pretreatment such as degreasing; treating it with a phosphate conversion coating solution of pH 3 to 4.5 (a chemical conversion coating process), which contains phosphate ions and nitrate ions as main components and further zinc ions of 100-300 ppm; and then, with or without film forming treatment before coating, applying a thermosetting water-paint composition (a coating process), which is manufactured from a raw material containing 10-70 mass% of monofunctional monomers having a 6-18C alkyl chain, and which includes a water-soluble polyester resin with number average molecular weight of 1,000-10,000, acid value of 20-80 and hydroxyl value of 50-200 and a curing agent, on a formed film by the chemical conversion coating.