短期氧污染对二氧化碳管道内壁顶部腐蚀的影响研究

侯禹岑; 梁沛楠; 冯兆缘; 齐亮; 徐云泽; 王明昱

doi:10.7643/ issn.1672-9242.2026.01.011

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装备环境工程 ›› 2026, Vol. 23 ›› Issue (1) : 97-105. DOI: 10.7643/ issn.1672-9242.2026.01.011

船舶及海洋工程装备

短期氧污染对二氧化碳管道内壁顶部腐蚀的影响研究

侯禹岑¹, 梁沛楠¹, 冯兆缘², 齐亮², 徐云泽^1,3, 王明昱^1*

作者信息 +

Effect of Short-term O₂ Contamination on Top-of-line Corrosion in CO₂ Pipelines

HOU Yucen¹, LIANG Peinan¹, FENG Zhaoyuan², QI Liang², XU Yunze^1,3, WANG Mingyu^1*

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文章历史 +

摘要

目的针对管道内壁顶部腐蚀问题,系统探究CO₂与O₂交互作用下冷凝液滴环境中碳钢腐蚀的动态演变过程。方法采用丝束电极（WBE）技术持续监测表面宏电池电流的动态演变,同时借助电化学阻抗谱（EIS）解析典型位置的局部微电池腐蚀差异。结果当环境由CO₂转为O₂时,WBE表面宏电池电流急剧升高,阴阳极分布重构,局部阳极电流显著集中。EIS分析进一步揭示,微电池腐蚀行为受腐蚀产物膜特性与氧扩散过程协同调控。结论短期氧污染会显著加剧二氧化碳管道内壁顶部的宏电池电流腐蚀过程,增加液滴边缘局部未成膜区域的点蚀风险。

Abstract

To address the top-of-the-line corrosion (TLC) phenomenon, the work aims to systematically investigate the dynamic corrosion mechanisms of carbon steel under condensate droplets in CO₂-O₂ mixed environments. The wire beam electrode (WBE) technique was employed to continuously monitor the dynamic evolution of surface macro-cell currents. Simultaneously, the electrochemical impedance spectroscopy (EIS) was applied to analyze localized micro-cell corrosion variations at representative positions. When the environment shifted from CO₂ to O₂, the macro-cell currents on the WBE surface increased sharply, accompanied by redistribution of anodic and cathodic areas and significant localization of anodic currents. EIS analysis revealed that the micro-cell corrosion behavior was predominantly governed by the synergistic effects of corrosion product film formation and oxygen diffusion dynamics. The findings indicate that short-term O₂ contamination significantly accelerates the macro-cell corrosion process at the pipeline's top-of-the-line area in CO₂ environments. Furthermore, the study identifies an increased pitting corrosion risk in the film-free areas along the droplet's inner edge.

导出引用

侯禹岑, 梁沛楠, 冯兆缘, 齐亮, 徐云泽, 王明昱. 短期氧污染对二氧化碳管道内壁顶部腐蚀的影响研究[J]. 装备环境工程. 2026, 23(1): 97-105 https://doi.org/10.7643/ issn.1672-9242.2026.01.011

HOU Yucen, LIANG Peinan, FENG Zhaoyuan, QI Liang, XU Yunze, WANG Mingyu. Effect of Short-term O₂ Contamination on Top-of-line Corrosion in CO₂ Pipelines[J]. Equipment Environmental Engineering. 2026, 23(1): 97-105 https://doi.org/10.7643/ issn.1672-9242.2026.01.011

中图分类号： TG172

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