Effect of Dissolved Oxygen on H<sub>2</sub>S Corrosion Behavior of BNS Pipeline Steel

ZHANG Wenliang; ZHANG Xiaohu; ZHANG Yunan; ZHU Jinyang; ZHANG Lei

doi:10.11973/fsyfh-202008002

Corrosion & Protection > 2020 > 41(8): 6-10. > DOI: 10.11973/fsyfh-202008002

ZHANG Wenliang, ZHANG Xiaohu, ZHANG Yunan, ZHU Jinyang, ZHANG Lei. Effect of Dissolved Oxygen on H₂S Corrosion Behavior of BNS Pipeline Steel[J]. Corrosion & Protection, 2020, 41(8): 6-10. DOI: 10.11973/fsyfh-202008002

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Effect of Dissolved Oxygen on H₂S Corrosion Behavior of BNS Pipeline Steel

1. Puguang Branch, Zhongyuan Oilfiled, Dazhou 635000, China;
2. MCC Construction Research Institute Co., Ltd., Beijing 100088, China;
3. National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China;
4. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China

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Received Date: March 14, 2020

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Based on a two-stage corrosion immersion test, the effect and mechanism of dissolved oxygen on H₂S corrosion behavior of BNS pipeline steel were studied. The results show that in H₂S environment, the mixture of oxygen could significantly promote the corrosion of BNS pipeline steel because of the formation of SO₄^2-, S₂O₃^2- and elemental sulfur in the reaction between O₂ and H₂S. Compared with the single H₂S environment, the corrosion product on BNS pipeline steel surface in the O₂/H₂S coexistence environment was much more and looser. The mixture of oxygen increased the localized corrosion sensitivity of BNS pipeline steel, which was contributed to dissolved oxygen, elemental sulfur and S₂O₃^2- generated by the reaction between H₂S and O₂.
- H₂S corrosion,
- sulfur oxide,
- oxygen,
- localized corrosion,
- pipeline steel

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Effect of Dissolved Oxygen on H2S Corrosion Behavior of BNS Pipeline Steel

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Effect of Dissolved Oxygen on H₂S Corrosion Behavior of BNS Pipeline Steel