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Effect of Strain on Passivation of Stainless Steel in a Simulated Concrete Pore Solution |
Xingguo FENG1,Xiangyu LU2,Yu ZUO3,Da CHEN1() |
1. Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Hohai University, Nanjing 210098, China 2. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China 3. School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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Abstract Passivation behavior of a deformed stainless steel in a simulated concrete pore solution was studied by means of open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), and Mott-Schottky plots. The results show that with the increasing strain, the OCP and impedance of the steel decreased, whereas the concentration of oxygen vacancy in passive films increased. This result suggests that the passivation of the stainless steel is degraded by the increasing strain. In addition, the difference in passivation between the deformed samples would not be diminished with the increasing immersion time.
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