Meng-hao Liu, Zhi-yong Liu, Cui-wei Du, Xiao-qin Zhan, Xiao-jia Yang, and Xiao-gang Li, The stress corrosion cracking behavior of high-strength mooring chain steel in SO2-polluted coastal atmosphere, Int. J. Miner. Metall. Mater.,(2020). https://doi.org/10.1007/s12613-020-2192-z
Cite this article as:
Meng-hao Liu, Zhi-yong Liu, Cui-wei Du, Xiao-qin Zhan, Xiao-jia Yang, and Xiao-gang Li, The stress corrosion cracking behavior of high-strength mooring chain steel in SO2-polluted coastal atmosphere, Int. J. Miner. Metall. Mater.,(2020). https://doi.org/10.1007/s12613-020-2192-z
Research Article

The stress corrosion cracking behavior of high-strength mooring chain steel in SO2-polluted coastal atmosphere

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  • Received: 26 June 2020Revised: 9 September 2020Accepted: 11 September 2020Available online: 12 September 2020
  • 21Cr2NiMo steel is widely used to stabilize offshore oil platforms, however, it suffers from stress corrosion cracking (SCC). Herein, we studied the SCC behavior of 21Cr2NiMo steel in SO2-polluted coastal atmospheres. Electrochemical tests revealed that the addition of SO2 increases the corrosion current. Rust characterization showed that the SO2 addition densities the corrosion products and promotes pitting. Furthermore, the slow strain rate tests demonstrated high susceptibility to SCC at high SO2 contents. Fracture morphologies revealed that the stress-corrosion cracks initiated at corrosion pits and the crack propagation showed transgranular and intergranular cracking modes. In conclusion, the SCC is mix-controlled by anodic dissolution and hydrogen embrittlement mechanisms.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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