Honda Motor Co., Ltd.

Yuken Industry Co., Ltd.

Kenji Suto

Hideaki Takada

Kota Tokubi

Yoshimi Kuroda

Masayuki Tsujimoto

Tomonori Saito

Masayuki Iijima

A rust-preventive coating comprises two layers of coatings contacted with each other, wherein among the two layers of coatings, a first coating as a coating at an inner layer side is obtained from a first paint composition that contains a first metal-based powder and a first binder component, among the two layers of coatings, a second coating as a coating at an outer layer side is obtained from a second paint composition that contains a second metal-based powder and a second binder component, and compositions are different between the first metal-based powder and the second metal-based powder.

Rust-preventive coating

A multilayer lubrication coating film is formed on the outer surface of an object to be coated. The multilayer lubrication coating film comprises a lower-layer coating film formed on an outer surface of the object to be coated, and an upper-layer coating film formed on a surface of the lower-layer coating film. The lower-layer coating film has a higher Vickers hardness than the Vickers hardness of the object to be coated.

Multilayer lubrication coating film and internal combustion engine piston using the coating film

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Wako, Japan

Kenji Suto