Title:
COMPOSITE HARD CHROMIUM PLATING
Document Type and Number:
WIPO Patent Application WO/2023/090234
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a composite hard chromium plating film having excellent hardness and wear resistance, in which the occurrence of non-bonded portions between the plating film and ceramic particles is suppressed and there are few defects in the film under practical chromium plating conditions; and a sliding member coated with said film. Specifically, the present invention provides a composite hard chromium plating film including tabular alumina, wherein the composite hard chromium plating film is characterized in that the chromium source for the composite hard chromium plating film is trivalent chromium, and the ratio A/B of the acid absorption A (µmol/m2) per unit area and the base absorption B (µmol/m2) per unit area of the tabular alumina is 0.5-1.5.
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Inventors:
KANDA RYO (JP)
SANO YOSHIYUKI (JP)
MATSUURA KEISUKE (JP)
SANO YOSHIYUKI (JP)
MATSUURA KEISUKE (JP)
Application Number:
PCT/JP2022/041825
Publication Date:
May 25, 2023
Filing Date:
November 10, 2022
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
C25D15/02
Domestic Patent References:
| WO2021131339A1 | 2021-07-01 |
Foreign References:
| JP2014196533A | 2014-10-16 | |||
| JPH05148691A | 1993-06-15 | |||
| JPH01246398A | 1989-10-02 |
Attorney, Agent or Firm:
ONO Takayuki (JP)
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