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EIS study of corrosion behavior of metallic materials in ethanol blended gasoline containing water as a contaminant

机译：EIS研究金属材料在以水为污染物的乙醇混合汽油中的腐蚀行为

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摘要

In the present paper, the effects of ethanol as a gasoline additive and water as a contaminant on the corrosion behavior of metallic components of a fuel delivery system were investigated. Electrochemical impedance spectroscopy (EIS) testing was performed in both water-free and water contaminated gasoline containing 0%, 5%, 10% and 15% ethanol without the addition of any supporting electrolyte. The surface of the specimens examined in 10% ethanol blended gasoline was observed by scanning electron microscope to understand what types of corrosion attack occurred. The results revealed that the addition of ethanol to gasoline fuel decreased the solution resistance and polarization resistance values of the specimens, resulting in an increase in the corrosion rates of these specimens in ethanol blended gasoline. Water contaminant caused a decrease in the polarization resistance of the ferrous specimens, whereas the observed behavior in others was reversed. Among the investigated metallic materials, the brazing alloy fared the best while Al 6061 alloy showed satisfactory corrosion resistance compared to the rest of the materials in both water-free and water-contaminated ethanol blended gasoline. Moreover, no localized attack was observed in corrosion products.
机译：在本文中，研究了乙醇作为汽油添加剂和水作为污染物对燃料输送系统金属部件腐蚀行为的影响。在不添加任何辅助电解质的情况下，在含有0％，5％，10％和15％乙醇的无水和水污染汽油中均进行了电化学阻抗谱（EIS）测试。通过扫描电子显微镜观察在10％乙醇混合汽油中检查的试样的表面，以了解发生了什么类型的腐蚀。结果表明，在汽油燃料中添加乙醇会降低样品的耐溶液性和极化电阻值，从而导致这些样品在乙醇混合汽油中的腐蚀速率增加。水污染物导致铁质样品的极化电阻降低，而在其他样品中观察到的行为则相反。在所研究的金属材料中，与其他材料相比，在无水和水污染的乙醇混合汽油中，钎焊合金的性能最佳，而Al 6061合金显示出令人满意的耐腐蚀性。此外，在腐蚀产物中未观察到局部腐蚀。

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  • 来源
    《Fuel》 |2011年第3期|p.1181-1187|共7页
  • 作者

    Hassan Jafari; Mohd Hasbullah Idris; Ali Ourdjini; Hadi Rahimi; Barat Ghobadian;

  • 作者单位

    Universti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia,Shahid Rajaee Teacher Training University, Tehran 16785-136, Iran;

    Universti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia;

    Universti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia;

    RSrD Department, Mega Motor Co., Tehran, Iran;

    Tarbiat Modares University, Tehran, Iran;

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

    gasoline; ethanol; corrosion; eis; metallic;

    机译：汽油;乙醇;腐蚀;EIs;金属;

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