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首页> 外文期刊>Applied Physics >A synergistic effect of dissolved oxygen, HCO_3~- and CI~- on the electrochemical corrosion behavior of X70 pipeline steel in the oilfield soil environment
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A synergistic effect of dissolved oxygen, HCO_3~- and CI~- on the electrochemical corrosion behavior of X70 pipeline steel in the oilfield soil environment

机译：溶解氧，HCO_3〜 - 和CI〜 - 对油田土壤环境中X70管道钢电化学腐蚀行为的协同作用

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摘要

The pipeline corrosion phenomenon in the Liaohe oilfield has become severe in recent years, and X70 steel has been extensively employed as a high-strength pipeline material in this oilfield. Therefore, in this study, the electrochemical corrosion of X70 steel in the simulated Liaohe oilfield soil solution was investigated under the combined action of dissolved oxygen (DO), HCO_3~-, and Cl~-. The corrosion behavior of X70 steel was examined by both the orthogonal test and the fitting analysis. It was found that DO, HCO_3~-, and Cl~- had profound influences on the corrosion behavior of X70 steel. When concentrations of HCO_3~-, and Cl~- were stable in the solution, both current corrosion density and corrosion rate gradually increased with the increasing DO concentration. When concentrations of DO and Cl~- were constant, the current corrosion density also increased with the increasing HCO_3~- concentration. When concentrations of DO and HCO~ were constant, the current corrosion density decreased significantly with the decreasing Cl~- concentration. In the soil solution, the corrosive effect of Cl~ ions were found to be the least among all three factors, whereas HCO_3~- ions had the greatest influence on the corrosion behavior of X70 steel.
机译：近年来辽河油田的管道腐蚀现象变得严重，X70钢在该油田中被广泛地用作高强度管道材料。因此，在这项研究中，在溶解氧（DO），HCO_3〜 - 和Cl〜 - - 中的组合作用下研究了X70钢在模拟辽河油田土壤溶液中的电化学腐蚀。通过正交试验和拟合分析检查了X70钢的腐蚀行为。发现了，HCO_3〜 - 和CL〜 - 对X70钢的腐蚀行为进行了深刻的影响。当HCO_3〜 - 和Cl〜 - - 在溶液中稳定的浓度时，随着浓度的增加，电流腐蚀密度和腐蚀速率均逐渐增加。当浓度和Cl〜 - 恒定的浓度时，随着HCO_3〜 - 浓度的增加，电流腐蚀密度也增加。当DO和HCO〜恒定的浓度时，随着CL〜浓度的降低，电流腐蚀密度显着降低。在土壤溶液中，发现Cl〜离子的腐蚀作用是所有三种因素中的至少一个因素，而HCO_3〜离子对X70钢的腐蚀行为产生了最大的影响。

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  • 来源
    《Applied Physics》 |2020年第11期|868.1-868.14|共14页
  • 作者

    Fei Xie; Zeqi Wang; Dan Wang; Siwen Yin;

  • 作者单位

    College of Petroleum Engineering Liaoning Shihua University Fushun 113001 China Liaoning Key Laboratory of Oil and Gas Storage and Transportation Technology Fushun China;

    College of Petroleum Engineering Liaoning Shihua University Fushun 113001 China;

    College of Petroleum Engineering Liaoning Shihua University Fushun 113001 China Liaoning Key Laboratory of Oil and Gas Storage and Transportation Technology Fushun China;

    College of Petroleum Engineering Liaoning Shihua University Fushun 113001 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    X70 pipeline steel; Dissolved oxygen; HCO_3~-·Cl~-·Pitting corrosion;

    机译：X70管道钢;溶解氧;HCO_3〜 - ·CL〜 - ·点腐蚀;

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