Title:
PREPARATION METHOD FOR CALCIUM SALT-BASED MAGNESIUM ALLOY SURFACE CORROSION-RESISTANT SELF-REPAIRING COATING
Document Type and Number:
WIPO Patent Application WO/2020/177223
Kind Code:
A1
Abstract:
The present invention relates to the technical field of self-repairing of materials. Disclosed is a preparation method for a calcium salt-based magnesium alloy surface corrosion-resistant self-repairing coating, capable of solving the problem in the prior art of a magnesium alloy surface coating being invalid and having poor self-repairing capability under a corrosion condition. The self-repairing coating is made of two parts and comprises an oxidation layer growing on the surface of a magnesium alloy substrate and a self-repairing layer depositing on the surface of the oxidation layer. A substrate layer is formed by performing micro-arc oxidation in an electrolyte, and the self-repairing layer is prepared by adding a corrosion inhibitor in a calcium salt solution under an acidic condition and performing deposition. The self-repairing coating prepared by the present invention has the advantages such as broad raw material sources, low costs and low processing difficulty, preparation and repeating are easy, a new protective capability can be formed in time when the coating is corroded and damaged, and accordingly, the technical problem of a conventional coating being low in protective performance under a corrosion environment is effectively solved.
Inventors:
LU XIAOPENG (CN)
QIAN KUN (CN)
LI YAN (CN)
HAN XINXIN (CN)
ZHANG TAO (CN)
WANG FUHUI (CN)
QIAN KUN (CN)
LI YAN (CN)
HAN XINXIN (CN)
ZHANG TAO (CN)
WANG FUHUI (CN)
Application Number:
PCT/CN2019/088600
Publication Date:
September 10, 2020
Filing Date:
May 27, 2019
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C25D11/30; C23C22/57; C23C28/04; C25D11/24
Foreign References:
| CN109680319A | 2019-04-26 | |||
| CN108914190A | 2018-11-30 | |||
| CN107190302A | 2017-09-22 | |||
| CN104694994A | 2015-06-10 | |||
| CN102304746A | 2012-01-04 |
Other References:
LIU, DAN ET AL.: "Self-Healing Coating Prepared by Loading Interphase Inhibitors into MAO Coating of AM60 Mg Alloy", JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol. 165, no. 7, 23 May 2018 (2018-05-23), XP55731685, DOI: 20191122175016X
GNEDENKOV, A. S. ET AL.: "Protective Properties of inhibitor-containing composite coatings on a Mg alloy", CORROSION SCIENCE, vol. 102, 21 October 2015 (2015-10-21), XP029323639, DOI: 20191122175241X
GNEDENKOV, A. S. ET AL.: "Protective Properties of inhibitor-containing composite coatings on a Mg alloy", CORROSION SCIENCE, vol. 102, 21 October 2015 (2015-10-21), XP029323639, DOI: 20191122175241X
Attorney, Agent or Firm:
SHENYANG UPDATE INTELLECTUAL PROPERTY AGENCY (CN)
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