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| Analysis of cracks origin behaviors during sulfide stress corrosion (SSC) in HSLA steel at different temperatures by electrochemical noise |
| Xiao-hua Li1,2, Chen-xi Liu2, Biao He3, Chuan-tao Lv3, Zhi-ming Gao2, Yong-chang Liu2 |
| 1 School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin 300222, China 2 State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China 3 Tianjin Pipe Corporation, Tianjin 300301, China |
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Abstract The sulfide stress corrosion (SSC) behaviors of the high strength low alloy steel at the different temperatures were investigated by the microstructural observation and electrochemical noise (EN) analysis. With the corrosion temperature increasing from 20 to 40 ℃, SSC ruptured time is prolonged. The increase in corrosion temperature results in the decrease of the saturation solubility of H2S in the solution and thus increases pH value of solution. The increase in corrosion temperature decreases the size of the holes and cracks in the corrosion product film on the surface of the sample, which is due to the formation of the dense FeS corrosion product film. The current kurtosis results indicate that the time for the first occurrence of crack initiation is postponed by the increase in the corrosion temperature. The standard deviation of current noise signals, current kurtosis, power spectral density and energy distribution plot results shows a great consistency, which suggests that EN analysis method can reflect SSC behaviors in real time.
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| Cite this article: |
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Xiao-hua Li,Chen-xi Liu,Biao He, et al. Analysis of cracks origin behaviors during sulfide stress corrosion (SSC) in HSLA steel at different temperatures by electrochemical noise[J]. Journal of Iron and Steel Research International, 2022, 29(11): 1836-1845.
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2022, Vol. 29 
