PRODUCTION OF ZN ALLOY ELECTROPLATED STEEL SHEET HAVING SUPERIOR CHEMICAL TREATABILITY AND CORROSION RESISTANCE

PRODUCTION OF ZN ALLOY ELECTROPLATED STEEL SHEET HAVING SUPERIOR CHEMICAL TREATABILITY AND CORROSION RESISTANCE

PURPOSE:To produce a Zn alloy electroplated steel sheet having superior chemical treatability and corrosion resistance by successively subjecting a steel sheet to Zn alloy electroplating with a plating soln., nonelectrolytic immersion in the plating soln., washing and anodic electrolysis. CONSTITUTI...

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Hauptverfasser: YONEZAWA KAZUMA, TAKASAKI ISAMU, HONJO TORU, KOBAYASHI SHIGERU
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APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS
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creator YONEZAWA KAZUMA
TAKASAKI ISAMU
HONJO TORU
KOBAYASHI SHIGERU
description PURPOSE:To produce a Zn alloy electroplated steel sheet having superior chemical treatability and corrosion resistance by successively subjecting a steel sheet to Zn alloy electroplating with a plating soln., nonelectrolytic immersion in the plating soln., washing and anodic electrolysis. CONSTITUTION:A steel sheet is pretreated and electroplated by cathodic electrolysis with a prescribed electrolytic soln. to deposit a prescribed amt. of a Zn alloy contg. a prescribed amt. of an alloying element. The electroplated steel sheet is nonelectrolytically immersed in the electrolytic soln. at about 0.5-2.5pH for about 3-20sec, taken out, washed and anodically electrolyzed under the conditions of about 1-150A/dm current density, about 5-500C/dm quantity of electricity and about >=4pH. The steel sheet is then washed and dried. A Zn alloy electroplated steel sheet having superior chemical treatability is obtd. without deteriorating corrosion resistance.
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subjects APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS
title PRODUCTION OF ZN ALLOY ELECTROPLATED STEEL SHEET HAVING SUPERIOR CHEMICAL TREATABILITY AND CORROSION RESISTANCE
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