High-design sliding member

Patent metadata

Field	Value
Publication number	US-11788191-B2
Application number	US-201716488727-A
Country	US
Kind code	B2
Filing date	Mar 3, 2017
Priority date	Mar 3, 2017
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

A sliding member includes, on a surface of a metal substrate, a surface-treated layer including a zinc-electroplated layer, a chemical conversion-treated layer, and a topcoat layer sequentially stacked on the metal substrate. The chemical conversion-treated layer includes chromium and oxygen. The topcoat layer includes at least one material selected from the group consisting of a silica compound, acrylic resin, polyurethane resin, epoxy resin, phenol resin, and melamine resin. A method of manufacturing the sliding member includes a step of forming, on a surface of the chemical conversion-treated layer, the topcoat 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.

First claim

The invention claimed is:

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/m 2 or greater and 8.0 mg/m 2 or less, and
a thickness of the chemical conversion-treated layer is in a range of 160 nm to 300 nm.

2. The sliding member according to claim 1 , wherein a thickness of the zinc-plated layer is in a range of 3 μm to 20 μm.

3. The sliding member according to claim 1 , wherein the thickness of the chemical conversion-treated layer is in a range of 160 nm to 220 nm.

4. A method of manufacturing 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 is being a clear layer made of 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, and
wherein the method comprises a step of forming the topcoat layer, on a surface of the chemical conversion-treated layer, and a step of forming the chemical conversion-treated layer before the step of forming the topcoat layer,
the step of forming the topcoat layer is a process of forming the topcoat layer with an applied amount of 0.3 mg/m 2 or greater and 8.0 mg/m 2 or less, and
the step of forming the chemical conversion-treated layer is a process of forming the chemical conversion-treated layer having a thickness in a range of 160 nm to 300 nm.

5. The method of manufacturing the sliding member according to claim 4 , wherein the step of forming the topcoat layer includes a process of applying a topcoat layer-coating liquid by impregnation to the metal substrate provided with the zinc-plated layer and the chemical conversion-treated layer, and then applying an air blow.

6. The method of manufacturing the sliding member according to claim 4 , further comprising a drying step after the step of forming the topcoat layer.

7. The method of manufacturing the sliding member according to claim 4 , further comprising a step of forming the zinc-plated layer on the surface of the metal substrate before the step of forming the chemical conversion-treated layer,
wherein the step of forming the zinc-plated layer is a process of forming the zinc-plated layer having a thickness in a range of 3 μm to 20 μm by electroplating.

Assignees

• Nissan Motor

Inventors

• Watanabe Satoshi
• Sugawara Soichiro
• Konno Ikuo

Classifications

• C23C22/48 Primary

  not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates · CPC title

• C23C22/53

  Treatment of zinc or alloys based thereon · CPC title

• C23C22/83

  Chemical after-treatment · CPC title

• C25D3/22

  of zinc · CPC title

• C25D5/34

  Pretreatment of metallic surfaces to be electroplated · CPC title