PRODUCTION OF GALVANIZED STEEL SHEET EXCELLENT IN SPOT WELDABILITY

PURPOSE:To improve the number of continuous welding spots in spot welding by sticking Ni to the surface of a galvanized steel sheet. CONSTITUTION:A galvanized or galvannealed steel sheet is subjected to cathode electrolysis in an aq. nitric acid soln. contg. Ni, and Ni is stick to the surface of the...

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Hauptverfasser:	TAIRA TAKETOSHI, FUJII SHIRO
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 number of continuous welding spots in spot welding by sticking Ni to the surface of a galvanized steel sheet. CONSTITUTION:A galvanized or galvannealed steel sheet is subjected to cathode electrolysis in an aq. nitric acid soln. contg. Ni, and Ni is stick to the surface of the steel sheet by >=1g/m . In this way, the electric current required for the formation of the nugget size is hardly changed even by an electrode after continuous welding spots in spot welding, so that welding is successively made possible to improve the number of continuous welding spots in spot welding.