Sumitomo Metal Industries, Inc.

Mitsubishi Jukogyo Kabushiki Kaisha

Atsuyoshi Shibuya

Kenichi Yanagi

Toshio Taguchi

Yoshio Shimozato

Tetsuaki Tsuda

Tatsuo Kurimoto

Toshio Nakamori

Hirohisa Seto

Junichi Uchida

Junkichi Yoneda

Yuuji Furuzawa

Hajime Shimasaki

Yukio Kanda

Mitsuo Kato

Minoru Nishihara

Katsuhiko Yamada

Kazuo Asano

Katsufumi Hidaka

Hirotaka Nakabayhashi

Teijiro Fujisaka

Katsufuma Hidaka

Hirotaka Nakabayashi

A method and apparatus for molten salt electroplating a steel member are disclosed, in which the surface of the steel member is activated by anodic treatment and the molten salt electroplating is performed on the activated surface of said steel member.

Method for molten salt electroplating of steel

Method and apparatus for molten salt electroplating of steel

A method and apparatus of continuous electroplating of a strip with an alloy by passing the strip through a plating bath of the immersion type in both down-pass and up-pass with an anode being positioned in each pass so as to face at least one side of the strip are disclosed. Said anode is an insoluble anode which is spaced from the strip by a distance of about 10-50 mm, and the plating solution is blown into the gap between said anode and said strip countercurrently with respect to the movement of said strip.

Method and apparatus for continuous electroplating of alloys

A steel sheet with two or more coatings and a method of producing the same are disclosed. The steel sheet has on at least one side a discontinuous surface layer of an Fe or Fe--Zn base alloy, preferably an Fe--Zn base alloy electrodeposit containing Sn in an amount of 0.01 to 50 mg/m.sup.2, usually in an amount of 1.0 to 50 mg/m.sup.2, preferably in an amount of 3.0 to 30 mg/m.sup.2, and also 5 to 50% by weight of Zn in case Fe--Zn alloy is used, and a layer of Zn--Ni or Zn--Fe alloy electrodeposit, which lies directly under said discontinuous surface layer.

Steel sheet with multilayer electroplating and method of producing same

A method of plating steel strip with a zinc-nickel alloy in an acidic bath, comprises continuously passing the steel strip through the electrolytic plating bath under the conditions that the concentration of Ni.sup.2+ is kept at a level of 20 g/l or more and the concentration of Zn.sup.2+ at a level of 10 g/l or more and the molar ratio of Ni.sup.2+ /Zn.sup.2+ is restricted to a range of from 1.5 to 4.0 with the speed of passage of the steel strip through the electrolyte relative to the counter-current flow of the electrolyte kept at 10-200 m/min.

Method of plating steel strip with nickel-zinc alloy

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Amagasaki, Japan

Atsuyoshi Shibuya