Effect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environments
Abstract In this study, the surface analysis, cross-section analysis and electrochemical analysis were used to explore the formation mechanism of Nb contents on the passive film of high-strength anti-seismic rebar in simulated concrete pore solution. The passivation experiments confirmed that the ad...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-11-01
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| Series: | npj Materials Degradation |
| Online Access: | https://doi.org/10.1038/s41529-024-00543-w |
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| _version_ | 1850107513953845248 |
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| author | Zeyun Zeng Shangjun Gu Jie Wang Fulong Wei Xiang Xie Zhiying Li Hui Yang Changrong Li |
| author_facet | Zeyun Zeng Shangjun Gu Jie Wang Fulong Wei Xiang Xie Zhiying Li Hui Yang Changrong Li |
| author_sort | Zeyun Zeng |
| collection | DOAJ |
| description | Abstract In this study, the surface analysis, cross-section analysis and electrochemical analysis were used to explore the formation mechanism of Nb contents on the passive film of high-strength anti-seismic rebar in simulated concrete pore solution. The passivation experiments confirmed that the addition of Nb promoted the stability and compactness of surface passive film of Nb-containing rebar, and the passivation efficiency of Nb-containing rebar was stronger than that of CS rebar. Firstly, with the decreases of pH, the increases of Nb promoted that the outer layer of the passive film were mainly composed of Fe oxides and Fe oxyhydroxides, the inner layer were mainly composed of Fe oxides and Nb oxides. Secondly, the increases of Nb were beneficial to the formation of Nb oxides, which enhanced the passivation rate of the passive film and inhibited the degradation of Fe oxides, thus enhancing the thickness of surface passive film of Nb-containing rebar. |
| format | Article |
| id | doaj-art-0e4653003cb443d08fe867b52e207375 |
| institution | OA Journals |
| issn | 2397-2106 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Materials Degradation |
| spelling | doaj-art-0e4653003cb443d08fe867b52e2073752025-08-20T02:38:35ZengNature Portfolionpj Materials Degradation2397-21062024-11-018112210.1038/s41529-024-00543-wEffect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environmentsZeyun Zeng0Shangjun Gu1Jie Wang2Fulong Wei3Xiang Xie4Zhiying Li5Hui Yang6Changrong Li7College of Materials and Metallurgy, Guizhou UniversityShougang Shuicheng Steel (Group) Co. Ltd.Shougang Shuicheng Steel (Group) Co. Ltd.Shougang Shuicheng Steel (Group) Co. Ltd.Shougang Shuicheng Steel (Group) Co. Ltd.College of Materials and Metallurgy, Guizhou UniversityCollege of Materials and Metallurgy, Guizhou UniversityCollege of Materials and Metallurgy, Guizhou UniversityAbstract In this study, the surface analysis, cross-section analysis and electrochemical analysis were used to explore the formation mechanism of Nb contents on the passive film of high-strength anti-seismic rebar in simulated concrete pore solution. The passivation experiments confirmed that the addition of Nb promoted the stability and compactness of surface passive film of Nb-containing rebar, and the passivation efficiency of Nb-containing rebar was stronger than that of CS rebar. Firstly, with the decreases of pH, the increases of Nb promoted that the outer layer of the passive film were mainly composed of Fe oxides and Fe oxyhydroxides, the inner layer were mainly composed of Fe oxides and Nb oxides. Secondly, the increases of Nb were beneficial to the formation of Nb oxides, which enhanced the passivation rate of the passive film and inhibited the degradation of Fe oxides, thus enhancing the thickness of surface passive film of Nb-containing rebar.https://doi.org/10.1038/s41529-024-00543-w |
| spellingShingle | Zeyun Zeng Shangjun Gu Jie Wang Fulong Wei Xiang Xie Zhiying Li Hui Yang Changrong Li Effect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environments npj Materials Degradation |
| title | Effect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environments |
| title_full | Effect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environments |
| title_fullStr | Effect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environments |
| title_full_unstemmed | Effect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environments |
| title_short | Effect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environments |
| title_sort | effect of nb contents on the passivation behavior of high strength anti seismic rebar in concrete environments |
| url | https://doi.org/10.1038/s41529-024-00543-w |
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