Determination of the Corrosion Rate of Steel Bars in Concrete Based on the Porosity of Interfacial Zone
In the present paper, a simple model to predict the corrosion rate of steel bars in concrete is developed, considering the influence of the porosity of steel-concrete interfacial zone. Firstly, a model for the porosity of the interfacial zone is developed basing on the water-cement ratio gradient in...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2020-09-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fmats.2020.573193/full |
| _version_ | 1818516845642121216 |
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| author | Xuan Zheng Xuan Zheng Sanqiang Yang Sanqiang Yang Shuang Sun Shuang Sun |
| author_facet | Xuan Zheng Xuan Zheng Sanqiang Yang Sanqiang Yang Shuang Sun Shuang Sun |
| author_sort | Xuan Zheng |
| collection | DOAJ |
| description | In the present paper, a simple model to predict the corrosion rate of steel bars in concrete is developed, considering the influence of the porosity of steel-concrete interfacial zone. Firstly, a model for the porosity of the interfacial zone is developed basing on the water-cement ratio gradient in the interfacial zone. Then the relationship between the porosity of the interfacial zone and the corrosion parameters of the steel bar in concrete is discussed, the anode-cathode ratio for the electrochemical corrosion process, the chloride threshold value and the resistivity of concrete are determined by the porosity of steel-concrete interfacial zone. The corrosion rate of steel bars, which is taken as the corrosion current density, is calculated by considering the cathodic concentration polarization of oxygen diffusion and resistance polarization of concrete, basing on the determined parameters above. Finally, the applicability and efficiency of the corrosion rate prediction model is verified by experiments. |
| first_indexed | 2024-12-11T00:47:56Z |
| format | Article |
| id | doaj.art-fed3e6944a044cba8fd21dce0c4ca4f4 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-12-11T00:47:56Z |
| publishDate | 2020-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-fed3e6944a044cba8fd21dce0c4ca4f42022-12-22T01:26:43ZengFrontiers Media S.A.Frontiers in Materials2296-80162020-09-01710.3389/fmats.2020.573193573193Determination of the Corrosion Rate of Steel Bars in Concrete Based on the Porosity of Interfacial ZoneXuan Zheng0Xuan Zheng1Sanqiang Yang2Sanqiang Yang3Shuang Sun4Shuang Sun5College of Civil Engineering and Architecture, Hebei University, Baoding, ChinaTechnology Innovation Center for Testing and Evaluation in Civil Engineering of Hebei Province, Baoding, ChinaCollege of Civil Engineering and Architecture, Hebei University, Baoding, ChinaTechnology Innovation Center for Testing and Evaluation in Civil Engineering of Hebei Province, Baoding, ChinaCollege of Civil Engineering and Architecture, Hebei University, Baoding, ChinaTechnology Innovation Center for Testing and Evaluation in Civil Engineering of Hebei Province, Baoding, ChinaIn the present paper, a simple model to predict the corrosion rate of steel bars in concrete is developed, considering the influence of the porosity of steel-concrete interfacial zone. Firstly, a model for the porosity of the interfacial zone is developed basing on the water-cement ratio gradient in the interfacial zone. Then the relationship between the porosity of the interfacial zone and the corrosion parameters of the steel bar in concrete is discussed, the anode-cathode ratio for the electrochemical corrosion process, the chloride threshold value and the resistivity of concrete are determined by the porosity of steel-concrete interfacial zone. The corrosion rate of steel bars, which is taken as the corrosion current density, is calculated by considering the cathodic concentration polarization of oxygen diffusion and resistance polarization of concrete, basing on the determined parameters above. Finally, the applicability and efficiency of the corrosion rate prediction model is verified by experiments.https://www.frontiersin.org/article/10.3389/fmats.2020.573193/fullinterfacial zoneporositycorrosion rateelectrochemical corrosionsteel bar |
| spellingShingle | Xuan Zheng Xuan Zheng Sanqiang Yang Sanqiang Yang Shuang Sun Shuang Sun Determination of the Corrosion Rate of Steel Bars in Concrete Based on the Porosity of Interfacial Zone Frontiers in Materials interfacial zone porosity corrosion rate electrochemical corrosion steel bar |
| title | Determination of the Corrosion Rate of Steel Bars in Concrete Based on the Porosity of Interfacial Zone |
| title_full | Determination of the Corrosion Rate of Steel Bars in Concrete Based on the Porosity of Interfacial Zone |
| title_fullStr | Determination of the Corrosion Rate of Steel Bars in Concrete Based on the Porosity of Interfacial Zone |
| title_full_unstemmed | Determination of the Corrosion Rate of Steel Bars in Concrete Based on the Porosity of Interfacial Zone |
| title_short | Determination of the Corrosion Rate of Steel Bars in Concrete Based on the Porosity of Interfacial Zone |
| title_sort | determination of the corrosion rate of steel bars in concrete based on the porosity of interfacial zone |
| topic | interfacial zone porosity corrosion rate electrochemical corrosion steel bar |
| url | https://www.frontiersin.org/article/10.3389/fmats.2020.573193/full |
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