Title:
HEXAVALENT CHROMIUM-FREE WATER-BASED SURFACE TREATMENT SOLUTION, SURFACE-TREATED METAL, AND SURFACE TREATMENT METHOD
Document Type and Number:
Japanese Patent JP2023025317
Kind Code:
A
Abstract:
To provide a hexavalent chromium-free water-based surface treatment solution that improves the corrosion resistance and coating adhesion of metal and can form a non-tinted coating layer.SOLUTION: Provided is a hexavalent chromium-free water-based surface treatment solution used for treating metal surfaces. The hexavalent chromium-free water-based surface treatment solution comprises a trivalent chromium ion, a phosphate ion, a sulfate ion, and colloidal silica, wherein the molar ratio of the phosphate ions to the trivalent chromium ions is 1.9-3.2 and the molar ratio of the sulfate ions to the trivalent chromium ions is 0.10-0.30.SELECTED DRAWING: None
Inventors:
SHIMAKURA TOSHIAKI
SASAKI MOTOHIRO
SASAKI MOTOHIRO
Application Number:
JP2021130449A
Publication Date:
February 22, 2023
Filing Date:
August 10, 2021
Export Citation:
Assignee:
NIPPON PAINT SURF CHEMICALS CO LTD
International Classes:
C23C22/30
Domestic Patent References:
| JP2012097329A | 2012-05-24 | |||
| JP2000282255A | 2000-10-10 | |||
| JP2005320573A | 2005-11-17 | |||
| JP2003268562A | 2003-09-25 | |||
| JP2002129352A | 2002-05-09 |
Foreign References:
| CN105586583A | 2016-05-18 | |||
| CN103993303A | 2014-08-20 |
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Kazuyoshi
Hayashi Kazuyoshi
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