STEEL SHEET HAVING MULTILAYERED PLATING PROVIDED WITH SUPERIOR CORROSION RESISTANCE AFTER COATING

PURPOSE:To improve the corrosion resistance of a steel sheet after coating by forming a plated Zn-Ni alloy layer contg. a specified amount of Ni on one side or both sides of the steel sheet by a specified extent of deposition and a plated Zn layer or a plated Zn alloy layer having baser potential th...

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Bibliographische Detailangaben
Hauptverfasser:	KURIMOTO MIKIO, OOISHI MASAYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the corrosion resistance of a steel sheet after coating by forming a plated Zn-Ni alloy layer contg. a specified amount of Ni on one side or both sides of the steel sheet by a specified extent of deposition and a plated Zn layer or a plated Zn alloy layer having baser potential than the outer Zn-Ni alloy layer just under the Zn-Ni alloy layer by a specified extent of deposition. CONSTITUTION:A plated Zn-Ni alloy layer contg. 8-20wt% Ni is formed on one side or both sides of a steel sheet by 5-40g/m . A plated Zn layer or a plated Zn alloy layer having baser potential than the outer Zn-Ni alloy layer is formed just under the Zn-Ni alloy layer by >=5g/m . The Zn alloy layer is an Ni-Zn alloy layer contg.