Study on the corrosion behavior of reinforcing steel in simulated concrete pore solutions using in situ Raman spectroscopy assisted by electrochemical techniques |
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| Authors: | Wen Chen Chen-Qing Ye Yan-Feng Zhu Chang-Jian Lin |
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| Affiliation: | State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China |
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| Abstract: | In situ Raman spectroscopy, electrochemical impedance spectroscopy (EIS) and polarization curves were used to study the corrosion behavior of reinforcing steel in simulated concrete pore (SCP) solutions (saturated Ca(OH)2 solutions). Results indicated that the reinforcing steel remained passive in chloride-free SCP solutions. However, the anodic polarization curve of the steel did not exhibit a stable passive region in the SCP solution with 0.5 M NaCl, the corrosion current density exceeded 0.1 μA cm−2, the steel surface was unstable with chloride attack and localized corrosion appeared on it with FeCO3 and Fe2O3 as the main corrosion products. |
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| Keywords: | Reinforcing steel Corrosion Simulated concrete pore solution In situ Raman spectroscopy Electrochemical impedance spectroscopy |
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