| YU Hao-bo,ZHANG De-long,HU Hui-hui,LIU Chuan-sen.Stress Corrosion Behavior of 310S Austenitic Stainless Steel with Different States in H2S/CO2 Environment[J],49(3):14-22 |
| Stress Corrosion Behavior of 310S Austenitic Stainless Steel with Different States in H2S/CO2 Environment |
| Received:December 03, 2019 Revised:March 20, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.03.002 |
| KeyWord:stress corrosion cold deformation aging treatment austenitic stainless steel H2S/CO2 environment |
| Author | Institution |
| YU Hao-bo |
Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/Gas Facility Materials, China University of Petroleum Beijing, Beijing , China |
| ZHANG De-long |
Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/Gas Facility Materials, China University of Petroleum Beijing, Beijing , China |
| HU Hui-hui |
Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/Gas Facility Materials, China University of Petroleum Beijing, Beijing , China |
| LIU Chuan-sen |
Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/Gas Facility Materials, China University of Petroleum Beijing, Beijing , China |
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| Abstract: |
| The work aims to investigate the stress corrosion behavior of 310S austenitic stainless steel with different states in H2S/CO2 environment. The stress corrosion behavior and electrochemical test of 310S austenitic stainless steel with three different states in wet H2S environment were studied, and the factors and mechanism influencing the stress corrosion cracking of 310S were explored. The stress corrosion resistance of 310S austenitic stainless steel after cold deformation treatment was improved, while the 310S steel was more susceptible to stress corrosion after aging treatment at 900 ℃. In addition, the corrosion resistance of the material would be worse when the load was applied. In the SSRT experiment, the stress corrosion sensitivity of the sample after solution treatment was 88.1%, that after aging treatment was increased to 91.5%, and that after cold rolling was reduced to 85.3%. Moreover, it was also observed that the crack usually originated from the local corrosion on the sample surface. From the quasi in situ hydrogen charging-TEM, the diffusion of hydrogen atoms into the matrix would promote dislocation movement, which would lead to dislocation plugging and stress concentration. Cold rolled 310S has the best corrosion resistance, followed by solid solution, and aging 310S has the lowest corrosion resistance. In the wet H2S environment, the cold-rolled 310S has the lowest SCC sensitivity, while the aging treatment can improve the SCC sensitivity. When H atom enters 310S, it will promote the movement, proliferation and plug of dislocations, which will lead to stress concentration and reduce the local corrosion resistance. |
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