2S/CO2 pressure environments was assessed using potentiostatic and electrochemical impedance spectroscopy (EIS) techniques. EIS measurements were carried at anodic potential of 150 mV vs. Ecorr and the results were compared with those of potentiostatic polarisation. The results revealed that the CPT of G3 Alloy under high temperature and high H2S/CO2 pressure environments was 58.5 oC in potentiostatic method and between 50-60 oC in EIS method. Both potentiostatic polarization and EIS methods give an almost identical CPT value."/>

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Study of Critical Pitting Temperature (CPT) of G3 Alloy under High Temperature and High H2S/CO2 Pressure Environments
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Institute of Advanced Materials and Technology,University of Science and Technology Beijing,Institute of Advanced Materials and Technology,University of Science and Technology Beijing,Institute of Advanced Materials and Technology,University of Science and Technology Beijing,Institute of Advanced Materials and Technology,University of Science and Technology Beijing,Institute of Advanced Materials and Technology,University of Science and Technology Beijing,Institute of Advanced Materials and Technology,University of Science and Technology Beijing

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TG174.2

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    Abstract:

    In this study, critical pitting temperature (CPT) of G3 alloy under high temperature and high H2S/CO2 pressure environments was assessed using potentiostatic and electrochemical impedance spectroscopy (EIS) techniques. EIS measurements were carried at anodic potential of 150 mV vs. Ecorr and the results were compared with those of potentiostatic polarisation. The results revealed that the CPT of G3 Alloy under high temperature and high H2S/CO2 pressure environments was 58.5 oC in potentiostatic method and between 50-60 oC in EIS method. Both potentiostatic polarization and EIS methods give an almost identical CPT value.

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[Li Dapeng, Zhang Lei, Yue Xiaoqi, Liu Jiancang, Wang Zhu, Lu Minxu. Study of Critical Pitting Temperature (CPT) of G3 Alloy under High Temperature and High H2S/CO2 Pressure Environments[J]. Rare Metal Materials and Engineering,2017,46(8):2144~2148.]
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History
  • Received:June 24,2016
  • Revised:October 30,2016
  • Adopted:November 11,2016
  • Online: November 16,2017
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