Japan Kanigen Co. Ltd.

Zexel Gmbh

Shizuo Toyoda

Tadao Senba

Hideya Itoh

Toshihiro Murayama

Tomoyasu Takahashi

Takao Hasegawa

Kazutaka Fujii

Disclosed are electrolessly plated nickel coatings containing 0.5 to 3.0% by weight of phosphorus and 0.05 to 2.0% by weight of boron, coatings obtained by subjecting to heat treatment electrolessly plated nickel coatings containing 0.5 to 3.0% by weight of phosphorus and 0.05 to 2.0% by weight of boron and machine parts having sliding surfaces wherein at least the sliding surfaces are coated with the coatings. The coatings can be suitably provided on base materials composed of aluminum alloys or the like, show high hardness, high impact strength (high toughness) and improved lubricating characteristics such as sliding characteristics and, in addition, can be formed at a high rate.

Electrolessly plated nickel/phosphorus/boron system coatings and machine

An electroless plating bath for forming black coatings containing a nickel salt and a reducing agent, which further contains a sulfur-containing compound, zinc ions and optionally microparticles, and a method for forming black coatings by electroless plating, wherein an article to be plated is immersed in the plating bath for a certain period of time, which provide black plated coatings without any post-treatments for blackening. Also provided is an article having an electrolessly plated black coating formed by the method.

Electroless plating bath for forming black coatings and process for

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Tokyo, Japan

Shizuo Toyoda