CORROSION RESISTANT GALVANIZED STEEL SHEET, AND PRODUCTION METHOD THEREFOR

PROBLEM TO BE SOLVED: To provide a corrosion resistant galvanized steel sheet which can have excellent corrosion resistance equal to or above that of a corrosion resistant galvanized steel sheet subjected to chromate treatment without using chromium compounds, and to provide a production method ther...

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Bibliographische Detailangaben
Hauptverfasser:	KAJITA TOMIO, NAKAMOTO TADASHIGE, IMAHORI MASASHI, IDO HIDEKAZU, KIHARA ATSUSHI
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 METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a corrosion resistant galvanized steel sheet which can have excellent corrosion resistance equal to or above that of a corrosion resistant galvanized steel sheet subjected to chromate treatment without using chromium compounds, and to provide a production method therefor. SOLUTION: The steel sheet has a corrosion resistant film comprising aluminum ions, citric acid ions, phosphoric acid ions, ammonium ions and silica. The components in the film satisfy the relations of 0.03