Double effects of O2 on passive film of super 13Cr stainless steel in CO2 saturated environment
Herein, a comprehensive suite of electrochemical methods, including cyclic polarization, Mott-Schottky (M-S), and electrochemical impedance spectroscopy (EIS) tests, were employed to investigate the effects of O<sub>2</sub> on passivation and pitting behavior of Super 13Cr in CO<sub>2</sub>-saturated environment. Our findings reveal that O<sub>2</sub> plays a dual role: O<sub>2</sub> substantially enhances the stability of passive film by diminishing point defeat density, thereby improving the resistance to local corrosive attacks. Conversely, within the stable pitting domain, O<sub>2</sub> exacerbates the severity of the corrosive environment, undermining the repassivation capabilities of super 13Cr stainless steel. The study elucidates the intricate interplay of O<sub>2</sub> and the passive film, offering valuable insights for the strategic application of Super 13Cr in the demanding conditions of modern oil and gas extraction processes where CO<sub>2</sub> and O<sub>2</sub> coexist.
Authors
- Haitao Yu (ORCID: https://orcid.org/0000-0003-3764-9201)
- Zhengyi Xu (ORCID: https://orcid.org/0000-0001-8309-9453)
- Fu Anqing
- Gang Zhang (ORCID: https://orcid.org/0000-0001-9812-8106)
- Xia Wang (ORCID: https://orcid.org/0000-0001-9925-5465)
- Yanqiu Wang (ORCID: https://orcid.org/0000-0001-9422-1792)
- Lv Naixin
- Wei Chenghua
Institutions
- Harbin Engineering University (CN)
- Daqing Oilfield General Hospital (CN)
- China National Petroleum Corporation (China) (CN)
Publication Details
- Journal
- Scientific Reports
- Published
- 2025-06-06
- DOI
- https://doi.org/10.1038/s41598-025-01208-7
- Citations
- 2
- Primary Topic
- Hydrogen embrittlement and corrosion behaviors in metals
- Type
- article
- Field-Weighted Citation Impact
- 1.30
Funders
- National Natural Science Foundation of China