Title:
ZINCCIRON ALLOYYELECTROPLATED STEEL SHEET FOR SPOT WELDING AND PRESSING
Document Type and Number:
Japanese Patent JPS54107838
Kind Code:
A
Abstract:
PURPOSE:To provide a zinc-iron alloy-electroplated steel sheet with superior press workability and spot weldability as well as good corrosion resistance and printability by electrolyzing a sheet in an electroplating bath contg. zinc and iron ions to electrodeposit iron and zinc in a specific ratio on the sheet surface. CONSTITUTION:A steel sheet is electrolyzed in an electroplating bath contg. zinc and iron ions to electrodeposit zinc and 7-80, pref. 10-65% of iron, thus providing a zinc-iron alloy-electroplated steel sheet for spot welding and pressing. For example, the sheet can be manufactured by carrying out electrolysis at a current density of 30 A/dm<2> in a short time in a plating bath of pH 1-2 contg. about 250 g/l of FeSO4 7H2O, about 10-100 g/l of ZnSO4 7H2O and an adequate amt. of a pH regulator such as ammonium sulfate.
Inventors:
FUKUZUKA TOSHIO
KAJIWARA KAZUICHI
MIKI KENJI
KAJIWARA KAZUICHI
MIKI KENJI
Application Number:
JP1557578A
Publication Date:
August 24, 1979
Filing Date:
February 13, 1978
Export Citation:
Assignee:
KOBE STEEL LTD
International Classes:
C25D5/26; C25D3/56; (IPC1-7): C25D3/56
Other References:
BRITISH WELDING JOURNAL=1968