Effect of CO2 content on corrosion non-uniformity of 20# steel in oil–water two-phase based on wire beam electrode technique

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

Corrosion Engineering, Science and Technology Pub Date : 2022-10-11 DOI:10.1080/1478422X.2022.2130509

J. Kou, Dongxing Ma, L. Yang, De-hua Wang

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Abstract

ABSTRACT With the widespread application of CO2-Enhanced Oilfield Recovery (CO2-EOR) technology, CO2 in large quantities enters oil and gas gathering pipelines and causes severe corrosion. As a result, this paper investigates the corrosion behaviour of 20# steel in produced water and 40% water content emulsion with different CO2 contents by combining Wire Beam Electrode (WBE) technology and the corrosion weight loss method, and establishes a corrosion mechanism model for analysis and explanation. The results demonstrate that variations in CO2 concentration have a greater impact on the corrosion process in the produced water simulated fluid, and there is considerable corrosion non-uniformity in the CO2 saturated state, as well as polarity reversal throughout the whole corrosion process. On the contrary, corrosion in the emulsion is more stable and uniform because the crude oil in the emulsion obstructs the mass transfer process of the depolariser agent and forms a ‘surface wetting’ effect on the metal surface, which seriously hinders the corrosion process.

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基于线束电极技术的CO2含量对20#钢油水两相腐蚀不均匀性的影响

随着CO2提高采收率(CO2- eor)技术的广泛应用，大量的CO2进入油气集输管道，造成严重的腐蚀。为此，本文结合钢丝束电极(WBE)技术和腐蚀失重法，研究了20#钢在不同CO2含量的采出水和40%含水量乳化液中的腐蚀行为，并建立了腐蚀机理模型进行分析和解释。结果表明，CO2浓度的变化对采出水模拟流体的腐蚀过程影响较大，在CO2饱和状态下存在相当大的腐蚀不均匀性，整个腐蚀过程存在极性反转。相反，由于乳状液中的原油阻碍了去极化剂的传质过程，对金属表面形成“表面润湿”效应，严重阻碍了腐蚀过程，因此在乳状液中的腐蚀更为稳定和均匀。

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.