Title:
ZINC-MANGANESE ALLOY PLATED STEEL SHEET
Document Type and Number:
Japanese Patent JPS6082690
Kind Code:
A
Abstract:
PURPOSE:To improve the blister resistance, pitting resistance and corrosion resistance of a plated steel sheet and the adhesive strength to a waterproof paint film by providing a two-layered structure to the Zn-Mn alloy layer formed by plating and by especially restricting the Mn content of the under layer. CONSTITUTION:Two Zn-Mn alloy layers are formed on the surface of a steel sheet by plating. At this time, the Mn content of the under layer exerting influence on the pitting resistance is restricted to <50wt%, and the Mn content of the upper layer exerting influence on the blister resistance is regulated to >=50 wt%. The amount of the under layer is 1-20g/m<2>, and total amount of the upper and under layers is <=60g/m<2>. The resulting Zn-Mn alloy plated steel sheet has superior blister resistance, pitting resistance, corrosion resistance and adhesive strength to a waterproof paint film. These characteristics are required by a steel sheet for automobiles or the like.
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Inventors:
ATAYA TAKESHI
SAGIYAMA MASARU
URAKAWA TAKAYUKI
SAGIYAMA MASARU
URAKAWA TAKAYUKI
Application Number:
JP18687183A
Publication Date:
May 10, 1985
Filing Date:
October 07, 1983
Export Citation:
Assignee:
NIPPON KOKAN KK
International Classes:
C25D3/56; C25D5/10; C25D5/26; (IPC1-7): C25D3/56; C25D5/10
Attorney, Agent or Firm:
Natsuo Shiotani
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