Nippon Steel Corporation

Takao Saito

Tadashi Tanaka

Hisao Odashima

Minoru Kitayama

Keiichi Tanikawa

Ryousuke Wake

Kikuji Hirose

Tatsuro Obi

Yoshihiko Hirano

Susumu Otsuka

Kazuya Ezure

Jyun-ichi Morita

Akitosi Kato

A cold rolled steel strip having an excellent conversion coating property is produced by a process comprising:

Process for producing cold rolled steel strip highly susceptible to

A differential multilayer-coated steel strip having an excellent corrosion resistance, enamel-adhering property, seam weldability and drawability and being useful for the production of cans, comprising

Steel strip having differentiated multilayer coatings and being useful

A cold rolled steel strip having an excellent phosphatizing property and being capable of firmly bonding with a corrosion-resistant paint coating, comprises a cold rolled steel strip substrate having at least one descaled surface thereof which is substantially free from carbonaceous and oxide substances and; at least one defective metal deposit layer incompletely covering the descaled surface and comprising at least one elementary metal selected from Mn, Ni, Co, Cu and Mo.

Cold rolled steel strip having an excellent phosphatizing property and

A method for the electrolytic tinning of steel strip in an electrolytic bath wherein the steel strip is the cathode and insoluble anodes are used, the electrodes are immersed in an electrolyte solution containing tin ions and wherein the concentration of the tin ions in the bath is controlled by passing the solution exterior of the bath in contact with tin in particulate form, while simultaneously maintaining a high content of dissolved oxygen in the solution. This latter treatment replenishes the tin concentration of the solution and the thus replenished electrolytic solution can be returned to the bath in a manner so as to consistently maintain the tin ion concentration at the desired level.

Process for electro-tin plating

A method for surface treatment of an electrolytic tin plate, comprising treating a tin-plated steel sheet with an aqueous solution containing at least one selected from the group consisting of pyrazole derivatives and colloidal substances, drying and reflowing the tin-plated steel sheet.

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Himeji, Japan

Takao Saito