IMR OpenIR
Influence of Microdefect Size on Corrosion Behavior of Epoxy-Coated Rebar for Application in Seawater-Mixed Concrete
Wan, Li1,2; Wei, Yinghua1; Zhao, Hongtao1; Cao, Haijiao1; Li, Jing1
Corresponding AuthorWei, Yinghua(yhwei@imr.ac.cn)
2021-04-01
Source PublicationCOATINGS
Volume11Issue:4Pages:25
AbstractCorrosion behavior of epoxy-coated rebar with different size of microdefects in uncarbonated/carbonated simulated pore solution (U/CSPS) of seawater concrete was investigated. Specimens in both solutions underwent two stages of corrosion, according to the electrochemical impedance spectroscopy (EIS) response. The initial stage was the extension of corrosion. The second stage was dominated by the diffusion process, due to the corrosion products blocking the defects and hindering the transportation of the reaction matter. Local electrochemical impedance spectroscopy (LEIS), scanning vibrating electrode technique (SVET) measurements and the observation of corrosion products indicated that 50 mu m might be the threshold, because the corrosion of specimens with defects bigger than 50 mu m in diameter was significantly more severe. Crevice corrosion was identified to occur in the experiments. The corrosion products of specimens in USPS and CSPS were mainly Fe3O4 and FeOOH, respectively. alpha-FeOOH and beta-FeOOH exhibited an anion ion-selective property in the corrosion process, which induced crevice corrosion in CSPS. In particular, it is contended herein that Fe3O4 has the cation ion-selective property to protect the substrate in USPS.
Keywordcorrosion epoxy-coated rebar seawater-mixed concrete microdefect LEIS SVET
Funding OrganizationStrategic Precursor Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
DOI10.3390/coatings11040439
Indexed BySCI
Language英语
Funding ProjectStrategic Precursor Research Program of the Chinese Academy of Sciences[XDA13040501] ; National Natural Science Foundation of China[52071320]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Materials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000642932500001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/162440
Collection中国科学院金属研究所
Corresponding AuthorWei, Yinghua
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
Wan, Li,Wei, Yinghua,Zhao, Hongtao,et al. Influence of Microdefect Size on Corrosion Behavior of Epoxy-Coated Rebar for Application in Seawater-Mixed Concrete[J]. COATINGS,2021,11(4):25.
APA Wan, Li,Wei, Yinghua,Zhao, Hongtao,Cao, Haijiao,&Li, Jing.(2021).Influence of Microdefect Size on Corrosion Behavior of Epoxy-Coated Rebar for Application in Seawater-Mixed Concrete.COATINGS,11(4),25.
MLA Wan, Li,et al."Influence of Microdefect Size on Corrosion Behavior of Epoxy-Coated Rebar for Application in Seawater-Mixed Concrete".COATINGS 11.4(2021):25.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wan, Li]'s Articles
[Wei, Yinghua]'s Articles
[Zhao, Hongtao]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wan, Li]'s Articles
[Wei, Yinghua]'s Articles
[Zhao, Hongtao]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wan, Li]'s Articles
[Wei, Yinghua]'s Articles
[Zhao, Hongtao]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.