Nippon Steel Corporation

Yoshihiko Hirano

Hisao Odashima

Susumu Yamaguchi

Takao Saito

Teruyoshi Hiraoka

Minoru Yoshida

A multiple coated composite steel strip having an excellent corrosion (rust) resistance, weldability and paint adhesion, and thus useful for car bodies, comprises a steel strip substrate, a first metal coating layer, a second chlorate coating layer formed by an electrolytic chromate treatment method, containing 40 to 120 mg/m.sup.2 of chromium and having a content of Cr.sub.2 O.sub.3 of 45% by weight or more, and a third resinous coating layer comprising a homopolymer or copolymer of acrylic acid, methacrylic acid, acrylic acid ester or methacrylic acid ester and 15% to 40% of colloidal silica particles having a very small size of 1 to 12 m .mu.m.

Multiple coated composite steel strip

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 process for regenerating an aqueous solution of organic electrolyte used for immersion or spraying treatment of tin plated materials prior to the melting treatment in the electrolytic tin plating, in which tin is removed from the solution and the regenerated solution is circulated and supplied for further use.

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Himeji, Japan

Yoshihiko Hirano