Pitting behavior on super 13Cr stainless steel in 3.5% NaCl solution in the presence of acetic acid |
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| Authors: | Z. F. Yin W. Z. Zhao W. Tian Y. R. Feng C. X. Yin |
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| Affiliation: | (1) School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an, 710049, People’s Republic of China;(2) The Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods, Tubular Goods Research Center, CNPC, Xi’an, 710065, People’s Republic of China |
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| Abstract: | The pitting behavior was investigated on super 13Cr stainless steels in 3.5% NaCl solution in the presence of HAc. The electrochemical measurements including potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and chronoamperometric experiments were carried out, as well as the SEM surface analysis. The parameters such as E corr and I corr were obtained by fitting technique. Moreover, the equivalent circuit model was applied in the analysis of Nyquist plots, and ZsimWin software was used to analyze the EIS data. The results indicate that the pitting corrosion is accelerated with increasing the amounts of HAc. In addition, pitting nucleation and growth mechanisms were described in this work. |
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| Keywords: | Super 13Cr stainless steel Acetic acid SEM Pitting |
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