ZINC-NICKEL PLATING CHLORIDE BATH AND MANUFACTURE OF ZINC-NICKEL PLATED STEEL SHEET BY USING SAME

PURPOSE:To manufacture a Zn-Ni alloy plated steel sheet excelling in powdering resistance by using a plating bath containing a specified quantity of a compound having chlorides of Zn, Ni and K as main components and plural complex forming conformations. CONSTITUTION:A compound having chlorides of Zn...

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Bibliographic Details
Main Authors MABUCHI MASAKI, MORITO NOBUYUKI, MOCHIZUKI KAZUO
Format Patent
LanguageEnglish
Published 15.12.1992
Subjects
APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Summary:PURPOSE:To manufacture a Zn-Ni alloy plated steel sheet excelling in powdering resistance by using a plating bath containing a specified quantity of a compound having chlorides of Zn, Ni and K as main components and plural complex forming conformations. CONSTITUTION:A compound having chlorides of Zn, Ni and K as main components and >=2 conformations forming a complex with a plating metal atom is included by 0.5 to 100gr/l to get a Zn-Ni alloy plating bath. A steel plate is plated by using the plating bath. At that time, a bath pH of 3.5 to 5, a bath temp. of 40 to 70 deg.C, a current density of 2 to 150A/dm , and a relative velocity of 0.5 to 5m/sec between the plating liquid and a strip are desirable. And it is proper that the plating is performed using a radial type cell, and at that time, it is desirable that the plating liquid of the above composition or a liquid which it is diluted to 1/1 to 1/10 to form is sprayed on the plating surface side of the steel sheet just before entering the plating cell. Thereby a Zn-Ni alloy plated steel sheet having a plating layer with good adhesion and without peeling at the time of press-forming.
Bibliography:Application Number: JP19910136314