Corrosion sensitivity analysis of pipelines in CO2 and H2S coexisting environment in the South China Sea

IF 2.7 4区材料科学 Q3 ELECTROCHEMISTRY

Corrosion Reviews Pub Date : 2022-05-16 DOI:10.1515/corrrev-2021-0052

Huan Peng, Pan Fang, Heng Luo, Hechao Sun

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Abstract

Abstract The purpose of the present work is to investigate the corrosion sensitivity of pipelines of oil and gas wells under complex environmental conditions (i.e., the primary and secondary relationship of the influence of different environmental factors on pipeline corrosion). The orthogonal experiment is introduced to design the experimental scheme. The weight loss method is employed to analyze the average corrosion rate of N80 steel under different environmental conditions. And then the scanning electron microscope is used to explore the surface and cross-section corrosion morphology of the corrosion products. Besides, the components of corrosion products are obtained by the energy spectrum analysis. The research results indicate that H2S partial pressure is the most sensitive factor to the corrosion of N80 pipeline and the influence of CO2 partial pressure on corrosion of N80 pipeline is weaker than Cl− concentration and temperature in the South China Sea. The study can help the oil drilling engineering search for direct and effective corrosion inhibitors under complex environmental conditions.

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南海CO2和H2S共存环境下管道腐蚀敏感性分析

摘要本工作的目的是研究复杂环境条件下油气井管道的腐蚀敏感性(即不同环境因素对管道腐蚀影响的主次关系)。采用正交试验法设计试验方案。采用失重法分析了N80钢在不同环境条件下的平均腐蚀速率。然后利用扫描电子显微镜观察腐蚀产物的表面和截面腐蚀形貌。此外，通过能谱分析得到了腐蚀产物的成分。研究结果表明，H2S分压是N80管道腐蚀的最敏感因素，CO2分压对N80管道腐蚀的影响弱于南海Cl−浓度和温度。该研究有助于石油钻井工程在复杂环境条件下寻找直接有效的缓蚀剂。

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 Reviews 工程技术-材料科学：膜

CiteScore

5.20

自引率

3.10%

发文量

审稿时长

4.5 months

期刊介绍： Corrosion Reviews is an international bimonthly journal devoted to critical reviews and, to a lesser extent, outstanding original articles that are key to advancing the understanding and application of corrosion science and engineering in the service of society. Papers may be of a theoretical, experimental or practical nature, provided that they make a significant contribution to knowledge in the field.