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Improving the self-healing performance of the water-borne epoxy anticorrosion coating in 3.5 wt% NaCl solution using acid and alkaline dual sensitive organic microspheres

Cao, Yang1,2; Yuan, Xuwen1,2; Wang, Xuan1,2; Wu, Hao1,2; Wang, Ge1,2; Yang, Huaiyu1
Corresponding AuthorYang, Huaiyu(hyyang@imr.ac.cn)
2022-06-01
Source PublicationPROGRESS IN ORGANIC COATINGS
ISSN0300-9440
Volume167Pages:12
AbstractAcid-alkaline double sensitive Eudragit microspheres embedded with corrosion inhibitor 8-hydroxyquinoline (8HQ@Eu) were prepared by a low-cost one-step method, and a novel coating was designed to improve the self-healing performance of the water-borne epoxy resin in 3.5 wt% NaCl solution by using the 8HQ@Eu as smart anti-corrosive carrier. The results of electrochemical impedance spectroscopy (EIS) showed the low-frequency impedance modulus (|Z|(0.01Hz)) of the scratched coating was about 10 times higher than that of the pure epoxy coating in the presence of 8HQ@Eu microspheres after 30 d of immersion, and the oxide film resistance and charge transfer resistance of the 8HQ@Eu sample increased about 10 times and 8 times respectively due to the covering of corrosion inhibitor protective film. While the results of scanning vibrating electrode technique (SVET) indicated the corrosion current of the 8HQ@Eu sample in the scratched area decreased to more than an order of magnitude lower than that of pure epoxy coating within 24 h. Salt spray test indicated that the substrate corrosion and coating delamination near the scratched area were significantly inhibited. XPS analysis directly confirmed that the corrosion inhibitor was delivered to the corroded sites.
KeywordSelf-healing coating pH-sensitive microspheres Loading capacity Anticorrosion
Funding OrganizationNational Basic Research Pro-gram of China
DOI10.1016/j.porgcoat.2022.106815
Indexed BySCI
Language英语
Funding ProjectNational Basic Research Pro-gram of China[2015CB655105]
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Applied ; Materials Science, Coatings & Films
WOS IDWOS:000792018900003
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173969
Collection中国科学院金属研究所
Corresponding AuthorYang, Huaiyu
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Cao, Yang,Yuan, Xuwen,Wang, Xuan,et al.

Improving the self-healing performance of the water-borne epoxy anticorrosion coating in 3.5 wt% NaCl solution using acid and alkaline dual sensitive organic microspheres

[J]. PROGRESS IN ORGANIC COATINGS,2022,167:12.
APA Cao, Yang,Yuan, Xuwen,Wang, Xuan,Wu, Hao,Wang, Ge,&Yang, Huaiyu.(2022).

Improving the self-healing performance of the water-borne epoxy anticorrosion coating in 3.5 wt% NaCl solution using acid and alkaline dual sensitive organic microspheres

.PROGRESS IN ORGANIC COATINGS,167,12.
MLA Cao, Yang,et al."

Improving the self-healing performance of the water-borne epoxy anticorrosion coating in 3.5 wt% NaCl solution using acid and alkaline dual sensitive organic microspheres

".PROGRESS IN ORGANIC COATINGS 167(2022):12.
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