Nippon Steel Corporation

Fumio Yamamoto

Seijun Higuchi

Kenichi Asakawa

Toshinori Katayama

Yashichi Oyagi

Makoto Yoshida

Toshinori Mizuguchi

Nobuyoshi Okada

Takayuki Ohmori

Minoru Fujinaga

Tomonari Oga

Katsuhiko Yabe

Koji Umeno

Senkichi Tsujimura

Tomonari Ohga

A hot-dip aluminium coated steel sheet having excellent corrosion resistance and heat resistance, comprising a steel substrate containing 3 to 18% chromium, not more than 0.02% carbon, 0.1 to 1.5% manganese, 0.005 to 0.08% aluminium, not more than 0.1% silicon, with the balance being iron and unavoidable impurities, and aluminium coating on said sheet substrate. The coated sheet may further comprises a coating layer of nickel or nickel-iron alloy (Ni: 1 to 99%) beneath the aluminium coating, or an Al-Fe-Si-Ni-Cr alloy coating layer of 1 to 10.mu. in thickness and containing 0.05 to 5% nickel, 0.2 to 10% chromium, beneath the aluminium coating.

Hot-dip aluminum coated steel sheet having excellent corrosion

A chromate surface treated steel sheet having very excellent paintability, corrosion resistance, and workability, more specifically surface treated steel sheets for paint coating, having very excellent properties, specifically with respect to corrosion resistance after paint coating, paint adhesion in services long after the paint coating (so-called secondary paint adhesion), corrosion resistance of paint coating defect portions, and resistance to secondary work cracking. The steel sheet contains not more than 0.15% carbon, 0.005 to 0.10% acid soluble aluminium, 0.5 to 20% chromium with the balance being iron and unavoidable impurities, and the chromate coating applied on the steel substrate comprises a metallic chromium layer in an amount ranging from 1 to 300 mg/m.sup.2, and a hydrated chromium oxide layer in an amount ranging from 5 to 50 mg/m.sup.2 in term of the metallic chromium contained therein.

Chromate surface treated steel sheet

Coated steel sheet of high corrosion resistance comprises a sheet of steel containing not more than 0.1% by weight of carbon, 0.005 to 0.08% by weight of soluble aluminum and 0.2 to 20% by weight of chromium, the balance being iron and unavoidable impurities. The steel carries a nickel or nickel alloy layer formed on at least one surface thereof and having a thickness of 0.001 to 1.5 microns and a layer of tin formed on the nickel or nickel alloy layer and having a thickness of at least 0.05 micron. A method of producing it is also disclosed.

Tinned steel sheet having a high degree of corrosion resistance and a

An apparatus for applying a coating of high-viscosity coating material onto a metal strip at high speed, wherein the apparatus has

Process of coating a metal strip with high-viscosity coating material

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Kitakyushu, Japan

Fumio Yamamoto