Stainless steel sheets and process for preparing same

Details Stainless steel sheets and process for preparing same Stainless steel sheets and process for preparing same

C - Chemistry, Metallurgy

25

D

204/17, 113/54

C25D 5/36 (2006.01) C25D 5/02 (2006.01)

Patent

CA 1319903

53 ABSTRACT OF THE DISCLOSURE An exterior stainless steel sheet is provided comprising a stainless steel substrate and a coating layer formed on one surface of the steel substrate from Al, Al alloy, Zn or Zn alloy to a thickness of 0.1 to 70 µm, preferably 1 to 70 µm. A Zn or Zn-Ni alloy plated stainless steel strip is prepared by degreasing a stainless steel strip, substantially activating the surface of the strip, and electroplating the strip in a zinc or zinc-nickel alloy plating bath at pH 3.5 or lower. During electroplating of one side, the other side of the strip not to be plated is covered with a protective film. A stainless steel sheet comprising a stainless steel substrate and a coating layer formed on one surface of the steel substrate from Zn or Zn alloy to a thickness of 0.1 to 50 µm, preferably 1 to 50 µm is useful in preparing welded pipes.

548397

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