Honda Giken Kogyo Kabushiki Kaisha

Hiroaki Mase

Nobuhiko Yoshimoto

Kiyonobu Mizoue

Osamu Ishigami

Hitoshi Karasawa

Hisayuki Sakurai

Hiroyuki Nomura

Yuzo Yoshioka

Takuji Kondou

In a disclosed composite plating method for a hollow member, an insertion electrode is loosely inserted with a space into a cylinder of a hollow member, a composite plating solution supplied from a solution supply pipe is circulated into the space of the cylinder, a base metal electrode is connected to the hollow member and composite plating is applied onto the inner peripheral surface of the hollow member. The current density between the insertion electrode and the inner peripheral surface of the hollow member is set at a low value at the beginning and is increased after a lapse of a predetermined time. More preferably, bubbles are produced by supplying gas into the composite plating solution almost simultaneously with the above-mentioned increase of the current density.

Composite plating method for hollow member

A hollow member whose internal surface is to be applied with composite plating is held in a condition in which a generatrix of the internal surface extends vertically. An electrode is inserted into the hollow member with a predetermined clearance to the internal surface of the hollow member. A composite plating liquid supply passage has a discharge opening which is in communication with an opening at a lower end of the hollow member. A gas is entrained in a form of bubbles into a composite plating liquid which is supplied into the clearance through the supply passage.

Method and apparatus for applying composite plating on hollow member

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Saitama, Japan

Hiroaki Mase