Title:
MULTI-PLY NI PLATED STEEL SHEET FOR DI CAN AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPH04154995
Kind Code:
A
Abstract:
PURPOSE:To maintain corrosion resistance with a small amt. of Sn and to improve formability by generating an Ni diffusion layer on both sides of a steel sheet, then applying an Ni plating, furnishing an Sn plating on one side and then forming a chromate film on both sides. CONSTITUTION:An Ni plating is applied on both sides of, a cold rolled steel sheet respectively at 0.03-0.6g/m<2> and heated to generate an Ni diffusion layer. An Ni plating is provided on the diffusion layer on both sides respectively at 0.01-0.2g/m<2>. An Sn plating is then furnished on the Ni plating layer on one side at 0.5-2.8g/m<2>. The plated steel sheet is treated with a chromating soln. consisting essentially of a bichromate to form a chromate film on both sides respectively at <=1mg/m<2> of Cr. Consequently, the elution of iron is reduced even if the amt. of Sn to be used is decreased, and a steel sheet withstanding DI working and excellent in outside face corrosion resistance is obtained.
Inventors:
YOMURA YOSHINORI
OKITA TOMOYOSHI
OKITA TOMOYOSHI
Application Number:
JP27505890A
Publication Date:
May 27, 1992
Filing Date:
October 12, 1990
Export Citation:
Assignee:
NIPPON KOKAN KK
International Classes:
C25D11/38; C23C28/00; C25D3/30; C25D5/12; C25D5/26; (IPC1-7): C23C28/00; C25D3/30; C25D5/12; C25D5/26; C25D11/38