Localised corrosion failure of an L245N pipeline in a CO2–O2–Cl− environment

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Engineering, Science and Technology Pub Date : 2023-03-16 DOI:10.1080/1478422X.2023.2188637

Jihui Leng, Zhiyuan Tian, Kexi Liao, T. He, Xin Liu, Guoxi He, Xin Tang, Guoqiang Xia

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引用次数: 2

Abstract

ABSTRACT Multicomponent thermal fluid flooding has become a widely used and very effective heavy-oil recovery technology, but the harsh CO2–O2–Cl− environment can lead to serious corrosion perforation failure of the pipeline. Therefore, the influence of O2 content and main controlling factors on corrosion perforation were investigated through a weight-loss experiment, corrosion defect test, characterization and grey correlation method. The results showed that, with the increase in O2 content, the general corrosion rate and localized corrosion rate increased. The uneven protection performance of the product after the addition of O2 was found to be the key cause of localized corrosion. In addition, the synergistic effect of O2–Cl− promoted the lateral and longitudinal expansion of pits. The results of the grey correlation showed that the temperature (30–120 °C) had a greater impact on localized corrosion compared with the content of O2 (0–0.045 MPa) and Cl− (0–16,000 mg/L).

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L245N管道在CO2–O2–Cl−环境中的局部腐蚀失效

多组分热液驱已成为一种应用广泛且非常有效的稠油采油技术，但恶劣的CO2-O2-Cl -环境会导致管道严重的腐蚀射孔失效。因此，通过失重实验、腐蚀缺陷测试、表征和灰色关联等方法，研究了O2含量及主要控制因素对腐蚀穿孔的影响。结果表明:随着氧含量的增加，总腐蚀速率和局部腐蚀速率均增大;发现产品加入O2后保护性能不均匀是局部腐蚀的关键原因。此外，O2-Cl−的协同作用促进了坑的横向和纵向扩展。灰色关联结果表明，相对于O2 (0 ~ 0.045 MPa)和Cl−(0 ~ 16000 mg/L)的含量，温度(30 ~ 120℃)对局部腐蚀的影响更大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Engineering, Science and Technology 工程技术-材料科学：综合

CiteScore

3.20

自引率

5.60%

发文量

审稿时长

3.4 months

期刊介绍： Corrosion Engineering, Science and Technology provides broad international coverage of research and practice in corrosion processes and corrosion control. Peer-reviewed contributions address all aspects of corrosion engineering and corrosion science; there is strong emphasis on effective design and materials selection to combat corrosion and the journal carries failure case studies to further knowledge in these areas.