Honda Motor Co., Ltd.

Dipsol Chemicals Co., Ltd.

Dowa IP Creation Co., Ltd.

Tsutomu Miyadera

Manabu Inoue

Tadahiro Ohnuma

Toshiki Inomata

Takashi Fujiwara

Kenji Kimura

Mitsutada Kaneta

Naohisa Okamoto

Yasuhiro Arai

In a projection material for mechanical plating, a steel particle is used as a core, and the surrounding surface thereof is coated with a zinc alloy in which the content of Al is more than 5% by mass but equal to or less than 16% by mass, the content of Mg is equal to or more than 5.5% by mass but equal to or less than 15% by mass and the remaining portion is Zn and an impurity, and the content of Fe is equal to or more than 3% by mass but equal to or less than 80% by mass. In this way, the corrosion resistance of a zinc-based coating itself formed in mechanical plating is remarkably enhanced without dependence on protective coating formation treatment such as chromate treatment.

Projection material for mechanical plating and high corrosion-resistant coating

The present invention provides a method for producing a coated stainless steel member, comprising: performing Wood's strike nickel plating on a stainless steel substrate, and then performing cationic electrodeposition on a formed Wood's strike nickel plating layer.

Coated stainless steel member

Disclosed is an electric Al&#x2014;Zr alloy plating bath containing an aluminum halide (A), one or more compounds (B) selected from the group consisting of N-alkylpyridinium halides, N-alkylimidazolium halides, N,N'-alkylimidazolium halides, N-alkylpyrazolium halides and N,N&#x2032;-alkylpyrazolium halides, and a zirconium halide (C). The molar ratio between the aluminum halide (A) and the compounds (B) is from 1:1 to 3:1. The electric Al&#x2014;Zr alloy plating bath further contains an aromatic organic solvent (D), an organic polymer (E) and one or more additives (F) selected from brightening agents.

Electric Al&#x2014;Zr alloy plating bath using room temperature molten salt bath and plating method using the same

To provide a barrel electroplating method which is less prone to bare spots and adhesion failure such as blisters and peeling, and which makes it possible to obtain uniform plated coatings free from burnt deposits and poor brightness, irrespective of the amount of workpieces. The present invention provides a method for performing barrel electroplating by use of an aluminum or aluminum alloy plating bath, the method comprising rotating, swinging, or vibrating an anode () placed inside a barrel () receiving workpieces, and simultaneously rotating, swinging, or vibrating the barrel, with a voltage being applied between the anode and a cathode provided on an inner wall surface of the barrel.

Aluminum or aluminum alloy barrel electroplating method

Disclosed herein is an electric Al or Al alloy plating bath which comprises (A) an aluminum halide; (B) one kind of compound or at least two kinds of compounds selected from the group consisting of N-alkylpyridinium halides, N-alkylimidazolium halides, N,N'-alkylimidazolium halides, N-alkyl-pyrazolium halides, N,N&#x2032;-alkylpyrazolium halides, N-alkylpyrrolidinium halides and N,N-alkyl-pyrrolidinium halides; and (C) a high boiling point aromatic hydrocarbon solvent, wherein the molar ratio of the aluminum halide (A) to the compound (B) ranges from 1:1 to 3:1 and the flash point of the plating bath is not less than 50&#xb0; C. The plating bath never involves any risk of causing an explosion, can be handled industrially with safety and can provide a smooth and fine Al of Al alloy plated film. Moreover, the resulting film has high resistance to corrosion even when it does not contain any chromium and therefore, it is quite suitable from the viewpoint of the environmental protection and it can thus be used in a wide variety of applications including the plating of parts for motorcars, and the plating of parts for electrical appliances.

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Wako, Japan

Tsutomu Miyadera