Nihon Parkerizing Co., Ltd.

Other

Seiki Mori

Masaaki Beppu

Eiji Hirai

Yuichiro Hara

Akira Tsujimura

Takayuki Wakae

Tadashi Kamimura

Yasutoshi Ohtoh

The present invention is applicable to composite particles for composite dispersion plating used for forming a self-lubricating composite dispersion coating and a method of plating using such composite particles as well as a plating (coating) using the same. The purpose of the invention is to obtain a composite particle for composite dispersion plating which is comprised of a particle with an excellent capability of reducing the friction and a low or very low specific gravity, and a method of plating using such composite particles. In this invention, each of the composite particles includes a friction-reducing mother or core particle ( ) encapsulated with shell particles ( ) comprised of the same components as a base metal of a composite dispersion plating bath ( ). This provides a composite particle for composite dispersion plating which is comprised of a particle with an excellent capability of reducing the friction and a low or very low specific gravity. As a result, the composite particles can form an eutectic system in a plating layer without addition of any surfactant.

Composite particles for composite dispersion plating and method of plating therewith

A slide member having a highly lubricative and highly abrasion-resistant plating layer formed on the sliding surface thereof. The plating layer contains fine particles of graphite selected from flake graphite, vein graphite and/or amorphous graphite in its metallic matrix. The plating layer has a hardness of not less than 550 in terms of Hv and is produced by using a plating solution containing naphthalene sulfanate of formalin condensate as surface active agent. The matrix is preferable to be a Ni&mdash;P type metallic matrix and the dispersed fine particles of graphite are preferable having a size of 0.1 to 20 &mgr;m and are contained by 0.1 to 10 wt % relative to the matrix.

Slide member

In an electroplating container in which at least one portion of an inside surface of the container is formed from a metal material serving as cathode or anode and an anode or cathode is placed in the container, a composite electroplating liquid containing metal ions and fine solid particles is introduced into a bottom portion of the container in such a manner that the introduced composite electroplating liquid spouts downward against an inside bottom surface of the container and is allowed to flow upward through a flow path formed between the anode and the cathode, and an electric current is applied between the anode and cathode so as to form a composite electroplating layer including the fine solid particles evenly distributed in a metal matrix on a surface of the cathode or anode facing the flow path.

Process and apparatus for composite electroplating a metallic material

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Tokyo, Japan

Seiki Mori