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Dual self-healing composite coating on magnesium alloys for corrosion protection
Department中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心
Liu, Siqin1,3; Li, Zhaoxia2; Yu, Qiangliang1,3; Qi, Yuming1,3; Peng, Zhenjun1; Liang, Jun1,3
The second department金属基高温润滑材料组
2021-11-15
Source PublicationChemical Engineering Journal
Issue424Pages:1-12
Abstract

In this work, a new self-healing composite coating for corrosion protection of magnesium (Mg) alloy, which is based on the dual actions of the corrosion inhibitor M-16 embedded in the micro-arc oxidation (MAO) coating and self-healing polyurethane (PU) modified by disulfide bonds, is developed. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) are used to study the anti-corrosion performance
of the scratched and healed composite coatings immersed in 3.5 wt% NaCl solution. Results show that
the porous MAO coating is suitable to carry inhibitor M-16 and the anti-corrosion performance of the scratched coating is significantly improved by the inhibitor embedded in the MAO coating. The scratched coating exhibits an excellent recovery of the anti-corrosion performance after the heat treatment, which is attributed to the cooperation of dynamic disulfide bonds and shape-memory effect of the self-healing PU coating. Furthermore, it is found that the inhibitor M-16 embedded MAO coating can enhance the repair ability and anti-corrosion performance of the PU coating when the corrosion product was pre-formed inside the scratch of the composite coating.

KeywordDual self-healing Micro-arc oxidation Corrosion inhibitor Polyurethane Disulfide bond
DOI10.1016/j.cej.2021.130551
Indexed BySCI
If13.273
Language英语
compositor第一作者单位
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/27773
Collection固体润滑国家重点实验室(LSL)
中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心
Corresponding AuthorLiang, Jun
Affiliation1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
2.Key Laboratory of Environmental Friendly Composite Materials and Biomass in Universities of Gansu Province, Northwest Minzu University
3.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu, Siqin,Li, Zhaoxia,Yu, Qiangliang,et al. Dual self-healing composite coating on magnesium alloys for corrosion protection[J]. Chemical Engineering Journal,2021(424):1-12.
APA Liu, Siqin,Li, Zhaoxia,Yu, Qiangliang,Qi, Yuming,Peng, Zhenjun,&Liang, Jun.(2021).Dual self-healing composite coating on magnesium alloys for corrosion protection.Chemical Engineering Journal(424),1-12.
MLA Liu, Siqin,et al."Dual self-healing composite coating on magnesium alloys for corrosion protection".Chemical Engineering Journal .424(2021):1-12.
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