COATED STEEL MATERIAL AND PRODUCTION METHOD THEREOF

PROBLEM TO BE SOLVED: To provide a coated steel material capable of suppressing generation of cathode peeling over a long period, and usable preferably as a heavy corrosion-proof steel material to which cathodic protection is applied; and to provide a production method thereof.SOLUTION: In a coated...

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Bibliographische Detailangaben
Hauptverfasser:	MURASE MASAJI, TSURI YUKIO
Format:	Patent
Sprache:	eng ; jpn
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 LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 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 coated steel material capable of suppressing generation of cathode peeling over a long period, and usable preferably as a heavy corrosion-proof steel material to which cathodic protection is applied; and to provide a production method thereof.SOLUTION: In a coated steel material including a steel material, and a chemical conversion treatment layer formed by covalent bond of isocyanate onto the surface of the steel material, the isocyanate has 1-3 isocyanate groups bonded to a carbon atom on one terminal of an aliphatic hydrocarbon having the carbon number of 2-30 which may be substituted by fluorine atoms.SELECTED DRAWING: Figure 2 【課題】長期にわたって陰極剥離の発生を抑制でき、カソード防食が適用される重防食鋼材としても好適に使用できる被覆鋼材、およびその製造方法を提供する。【解決手段】鋼材と、イソシアネートが前記鋼材の表面に共有結合して形成された化成処理層とを備え、前記イソシアネートが、フッ素原子で置換されていてもよい炭素数２〜３０の脂肪族炭化水素の一方の末端の炭素原子に、１〜３個のイソシアネート基が結合したイソシアネートである被覆鋼材。【選択図】図２