Kabushiki Kaisha Kobe Seiko Sho

Kobe Steel, Ltd.

Shigeki Kirihara

Masatoshi Iwai

Hirohiko Sakai

Ichiro Kokubo

Tsutomu Ohshima

An article of manufacture comprising a steel substrate coated with an electroplated metallic double layer with good corrosion resistance after painting and wet adhesion of paint film; said article having on the steel substrate a first layer of electroplated Zn-Ni alloy containing 7-15 wt % of Ni and on the first layer and, on said first layer, a second electroplated layer of iron or Fe-Zn alloy containing more than 60% of Fe and less than 40% of Zn.

Double-layer electroplated steel article with corrosion resistance after

An electroplated corrosion resistant steel, having on a base steel a first plated layer of a Zn-Ni alloy containing 5-20% of Ni and a second electroplated layer of zinc containing 0.005-0.5% of Cr. A method for producing the high corrosion resistant steel material is also disclosed.

Electroplated corrosion resistant steels and method for manufacturing

An anticorrosive treatment for preventing white rust on galvanized steels, comprises applying to the surface of a galvanized steel sheet an acidic solution containing molybdic acid or a molybdate in a concentration of 10-200 g/l calculated as molybdenum and adjusted to a pH value of 1-6 by addition of an organic or inorganic acid.

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Kobe, Japan

Shigeki Kirihara