| 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 Author | Wei, Yinghua(yhwei@imr.ac.cn) |
| 2021-04-01 | |
| Source Publication | COATINGS
 |
| Volume | 11Issue:4Pages:25 |
| Abstract | Corrosion 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. |
| Keyword | corrosion epoxy-coated rebar seawater-mixed concrete microdefect LEIS SVET |
| Funding Organization | Strategic Precursor Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China |
| DOI | 10.3390/coatings11040439 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Strategic Precursor Research Program of the Chinese Academy of Sciences[XDA13040501] ; National Natural Science Foundation of China[52071320] |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Materials Science, Coatings & Films ; Physics, Applied |
| WOS ID | WOS:000642932500001 |
| Publisher | MDPI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/162440 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wei, Yinghua |
| Affiliation | 1.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. |
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