US 11,788,191 B2
High-design sliding member
Satoshi Watanabe, Kanagawa (JP); Soichiro Sugawara, Kanagawa (JP); and Ikuo Konno, Kanagawa (JP)
Assigned to NISSAN MOTOR CO., LTD., Yokohama (JP)
Appl. No. 16/488,727
Filed by NISSAN MOTOR CO., LTD., Yokohama (JP)
PCT Filed Mar. 3, 2017, PCT No. PCT/JP2017/008627
§ 371(c)(1), (2) Date Aug. 26, 2019,
PCT Pub. No. WO2018/158959, PCT Pub. Date Sep. 7, 2018.
Prior Publication US 2021/0130961 A1, May 6, 2021
Int. Cl. C23C 22/48 (2006.01); C23C 22/83 (2006.01); C25D 5/34 (2006.01); F16C 33/20 (2006.01); C25D 3/22 (2006.01); C23C 22/53 (2006.01)
CPC C23C 22/48 (2013.01) [C23C 22/53 (2013.01); C23C 22/83 (2013.01); C25D 3/22 (2013.01); C25D 5/34 (2013.01); F16C 33/203 (2013.01); F16C 33/208 (2013.01); C23C 2222/10 (2013.01); F16C 2204/50 (2013.01); F16C 2223/70 (2013.01); F16C 2240/64 (2013.01); Y10T 428/12549 (2015.01)] 7 Claims
OG exemplary drawing
 
1. A sliding member comprising, on a surface of a metal substrate, a surface-treated layer comprising a zinc-plated layer, a chemical conversion-treated layer, and a topcoat layer sequentially stacked on the metal substrate,
the chemical conversion-treated layer including chromium and oxygen,
the topcoat layer being a clear layer including at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin,
wherein a value of L* is 85 or greater, a value of |a*| is smaller than 6, a value of |b*| is smaller than 8, and a level of metallic gloss is 170 or greater on a surface of the sliding member according to a L*a*b* color system,
an applied amount of the topcoat layer is 0.3 mg/m2 or greater and 8.0 mg/m2 or less, and
a thickness of the chemical conversion-treated layer is in a range of 160 nm to 300 nm.