Nippon Steel Corporation

Toyota Jidosha Kabushiki Kaisha

Nippon Kinzoku Co., Ltd.

Hisashi Baba

Shinichi Matsumoto

Yasuto Goto

Kohei Tokuda

Mikio Yamanaka

Toshihiro Takada

Kenichiro Matsumura

Nobuyuki Shimoda

Keiichi Ohmura

Akihiko Kasahara

Toshiyuki Yashiro

Shinzi Shibata

Shigetoshi Sugimoto

Hiroo Wakiyama

The present invention provides a coated steel product including: a steel product; a coating layer that is coated on the surface of the steel product and that includes from 8 to 50% by mass of Mg, from 2.5 to 70.0% by mass of Al, and from 0.30 to 5.00% by mass of Ca, with the balance consisting of Zn and impurities; and an intermediate layer interposed between the steel product and the coating layer, in which the intermediate layer has a sea-island structure constituted by a sea portion composed of an Al&#x2014;Fe alloy phase, and island portions including a Zn&#x2014;Mg&#x2014;Al alloy phase having a Mg content of 8% by mass or more, and in which the sea portion composed of the Al&#x2014;Fe alloy phase has an area fraction of from 55 to 90%.

Coated steel product

A process for producing a metallic catalyst-carrier, comprising the steps of: preparing a steel sheet containing 9.0 to 25.0 wt % Cr and 0.01 to 6.0 wt % Al, plating the steel sheet with Ni at an amount of from 0.3 to 10.0 g/m.sup.2, then plating with Al or Al-alloy at a plated amount defined by the formula; ##EQU1## and with a provision that the thickness of an Al-Fe alloyed layer is controlled to a thickness of 10 .mu.m or less, cold rolling to a rolled thickness of 0.1 mm or less, working to a body of a required form, and heat-treating the body.

Processes for production of metallic catalyst-carrier and catalytic

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Kitakyushu, Japan

Hisashi Baba