Effects of CO2 gassy-supercritical phase transition on corrosion behaviors of carbon steels in saturated vapor environment

饱和水蒸气环境中 CO2 气相- CO2 超临界相相变对碳钢腐蚀行为的影响

Abstract

Corrosion behaviors of P110 and N80 tubular steels in CO2 gas phase and supercritical (S-CO2) phase in a saturated water vapor environment were explored in corrosion weight loss experiments by SEM, EDS, XRD, XPS and cross-section analysis techniques. With the increase in CO2 partial pressure, the average corrosion rate increased first and then decreased. The average corrosion rate reached the maximum value under the near-critical pressure. When CO2 partial pressure further increased to be above the critical pressure, the average corrosion rate gradually decreased and local aggregation of molecules was weakened.

摘要

通过腐蚀失重实验研究了 P110 和 N80 钢管在气相 CO2 -饱和水蒸气环境和超临界 CO2 -饱和水蒸气环境中的腐蚀速率变化, 并通过 SEM, EDS, XRD, XPS 和截面技术对腐蚀产物进行了表面分析. 结果表明: 随着 CO2 分压的增加, 试样平均腐蚀速率先升高后降低; 在临界压力附近, 试样平均腐蚀速率达到最大值; 在高于临界压力后, 随着CO2 分压的进一步增加, 分子局部聚集现象减弱, 试样平均腐蚀速率降低.

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Author information

Affiliations

Authors

Contributions

ZENG De-zhi designed the project. HUANG Zhi-yao and YU Zhi-ming carried out data processing, performed data analysis, and contributed to the paper writing. SHI Shan-zhi, LIU Cong-ping and YI Yong-gang offered some valuable suggestions for the contents of the manuscript. SUN Yi-cheng and TIAN Gang offered the specimen, performed data analysis. All authors replied to reviewers’ comments and revised the final version.

Corresponding author

Correspondence to De-zhi Zeng 曾德智.

Ethics declarations

ZENG De-zhi, HUANG Zhi-yao, YU Zhi-ming, SHI Shan-zhi, YI Yong-gang, LIU Cong-ping, TIAN Gang and SUN Yi-cheng declare that they have no conflict of interest.

Additional information

Foundation item: Project(21JCQN0066) supported by the Youth Science & Technology Foundation of Sichuan Province, China

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Zeng, Dz., Huang, Zy., Yu, Zm. et al. Effects of CO2 gassy-supercritical phase transition on corrosion behaviors of carbon steels in saturated vapor environment. J. Cent. South Univ. 28, 325–337 (2021). https://doi.org/10.1007/s11771-021-4605-1

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Key words

  • carbon capture and storage
  • supercritical carbon dioxide
  • corrosion product
  • corrosion mechanism

关键词

  • 碳捕获和储存
  • 超临界 CO2
  • 腐蚀产物
  • 腐蚀机理