Aisin Seiki Kabushiki Kaisha

Hiroaki Sasayama

Takuya Niimi

Akihiro Okamoto

Hajime Minaki

In a deposition method of Ni&#x2014;P&#x2014;B system plating film, electroplating is performed in a plating bath containing Ni ions, phosphorous acid ions, alkylamine borane, acetic acid, at least one sort of a primary brightening agent, and a secondary brightening agent including at least one sort of a surface active agent. In the above-mentioned plating bath, concentration of alkylamine borane in said plating bath is 1.37 mmol/L or more, and concentration of acetic acid in said plating bath is 0.70 mol/L or more and less than 2.80 mol/L. Thereby, plating film having high hardness of Hv 700 or more can be deposited with high manufacturing efficiency without baking processing, while reducing occurrence of poor appearance, such as burning and abnormal precipitation, even when current density is increased to 80 A/dmor more to raise deposition rate.

Deposition method of Ni&#x2014;P&#x2014;B system electroplating film, the film, and slide member comprising the film

A mechanical component for an internal combustion engine includes a mechanical component body made of one of aluminum and aluminum alloy and used for the internal combustion engine, a nickel plating layer formed to cover a surface of a predetermined portion of the mechanical component body, and a reforming layer formed between the surface of the predetermined portion of the mechanical component body and the nickel plating layer.

Mechanical component for internal combustion engine, manufacturing method of mechanical component for internal combustion engine, and mechanical component

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Nagoya, Japan

Hiroaki Sasayama