L245NS钢在不同O2含量的CO2/H2S/O2体系中的腐蚀行为探究

doi:10.11896/cldb.24070131

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Abstract Tight oil in Block H of an oilfield is extracted by injecting multiple thermal fluids, and the extract contains CO₂, H₂S and O₂, etc. The high-temperature mixed gas flow into the gathering and transportation pipeline forms a CO₂/H₂S/O₂ corrosion system, and the corrosion problem of the pipeline system is serious. Therefore, in view of the characteristics of large variation of O₂ content in the field products, the corrosion behavior of L245NS steel at different O₂ content (0%, 1%, 2%, 3%) was studied in a high temperature and high pressure reactor, and the composition and microstructure of the corrosion products were analyzed. The results show that the uniform corrosion rate increases with the increase of O₂ content. The O₂ participates in the cathodic depolarization reaction, and oxidizes Fe²⁺ to form loose and porous high valence oxides of Fe, which inhibits the formation of FeCO₃. At the same time, the interaction between O₂ and H₂S was enhanced, and the generated S element continued to participate in the corrosion reaction, resulting in the decline of product protection performance. The results of local corrosion rate showed that it increased first and then decreased with the increase of O₂ content. When the O₂ content is 2%, it has a maximum value, and when the O₂ content is high, it can inhibit local corrosion. Based on the experimental results, more corrosion-resistant alloy steel can be selected for the selection of gathering and transmission pipeline materials. If the O₂ content of the produced product is controlled below 1%, the corrosion of steel can be minimized.

Key words： O₂ content CO₂/H₂S/O₂ system L245NS steel corrosion mechanism

Published: 25 September 2025 Online: 2025-09-11

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TE88

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	Articles by authors
	ZHOU Feilong
	TANG Xin
	GUO Lei
	LIAO Kexi
	LENG Jihui

Cite this article:

ZHOU Feilong,TANG Xin,GUO Lei, et al. Study on Corrosion Behavior of L245NS Steel in CO₂/H₂S/O₂ Systems with Different O₂ Contents[J]. Materials Reports, 2025, 39(18): 24070131-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24070131 OR https://www.mater-rep.com/EN/Y2025/V39/I18/24070131

1 Yuan S B, Sun J, Gong Y N, et al. Unconventional Oil and Gas, 2023, 10(2), 26(in Chinese).
袁士宝, 孙健, 宫宇宁, 等. 非常规油气, 2023, 10(2), 26.
2 Jiang Q, You H J, Pan J J, et al. Special Oil And Gas Reservoirs, 2020, 27(6), 30 (in Chinese).
蒋琪, 游红娟, 潘竟军, 等. 特种油气藏, 2020, 27(6), 30.
3 Liu Y G, Yang H L, Zhao L C, et al. In:Conference Record of the 2010 OTC. Houston, 2010.
4 Chen S D, Wu H, Wang C Y, et al. Oil and Gas and New Energy, 2022, 34(6), 101(in Chinese).
陈思锭, 吴浩, 王春燕, 等. 油气与新能源, 2022, 34(6), 101.
5 Qian H J. Research on internal corrosion and protection technology of heavy oil fire drive tail gas pipeline. Master's Thesis, Southwest Petroleum University, 2016 (in Chinese).
钱惠杰. 稠油火驱尾气管道内腐蚀与防护技术研究. 硕士学位论文, 西南石油大学, 2016.
6 Fang G X, Li Y D, Yang Y Z, et al. Materials Reports, 2023, 37(2), 428(in Chinese).
方国鑫, 李亚东, 杨雲智, 等. 材料导报, 2023, 37(2), 428.
7 Geng C L, Gu J, Xu Y M, et al. Materials Reports, 2011, 25(1), 119(in Chinese).
耿春雷, 顾军, 徐永模, 等. 材料导报, 2011, 25(1), 119.
8 Qiu Z C, Xiong C M, Chang Z L, et al. Petroleum Exploration and Development, 2012, 39(2), 256.
9 Okonkwo P C, Sliem M H, Shakoor R A, et al. Journal of Materials Engineering and Performance, 2017, 26, 377.
10 Liao K X, Qin M, Yang N, et al. Materials Chemistry & Physics, 2022, 292, 126838.
11 Hua Y, Barker R, Neville A. Applied Surface Science, 2015, 356, 499.
12 Lin X Q, Liu W, Wu F, et al. Applied Surface Science, 2015, 329, 104.
13 Zhu G Y, Li Y Y, Hou B S, et al. Journal of Materials Science & Technology, 2021, 88(29), 79.
14 Leng J H, Cheng Y, Liao K X, et al. Engineering Failure Analysis, 2022, 138, 106332.
15 Liu J, Yao D Z, Chen K, et al. Energies, 2023(16), 6119.
16 Shi S K, Feng W B, Sun C, et al. Journal of Physics:Conference Series, 2024, 2686, 012028.
17 Zhong X K, Wang Y R, Liang J J, et al. Materials, 2018, 11(9), 1635.
18 Sun J B, Sun C, Zhang G A, et al. Corrosion Science, 2016, 107, 31.
19 Sun C, Sun J B, Wang Y, et al. Corrosion Science, 2016, 107, 193.
20 Song X Q, Wang Y R, Liang J J, et al. Natural Gas And Oil, 2018, 36 (6), 92(in Chinese)
宋晓琴, 王彦然, 梁建军, 等. 天然气与石油, 2018, 36(6), 92.
21 Liao K X, Zhou F L, Song X Q, et al. Journal of Materials Engineering and Performance, 2020, 29(1), 155.