MULTILAYER PLATED STEEL SHEET

PURPOSE:To obtain a multilayer plated steel sheet having superior corrosion resistance and workability, by forming Zn-Fe alloy layers having a specified Fe content as the innermost and outermost layers and a Zn-Fe alloy layer having a specified Fe content or a Zn layer as a middle layer on the surfa...

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Bibliographische Detailangaben
Hauptverfasser:	YAMATO KOJI, HONJO TORU
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR 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 ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a multilayer plated steel sheet having superior corrosion resistance and workability, by forming Zn-Fe alloy layers having a specified Fe content as the innermost and outermost layers and a Zn-Fe alloy layer having a specified Fe content or a Zn layer as a middle layer on the surface of a steel sheet. CONSTITUTION:Three plating layers 2-4 are successively formed on a steel sheet 1. The 1st layer 2 as the innermost layer and the 3rd layer 4 as the outermost layer are Zn-Fe alloy layers having 5-30wt.% Fe content. The 2nd layer 3 as a middle layer is a Zn-Fe alloy layer having