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Molecular structure of heterocyclic compunds and their inhibitive action for corrosion of grade 1100 aluminium in dilute HCl

机译:稀盐酸中杂环化合物的分子结构及其对1100级铝腐蚀的抑制作用

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摘要

The inhibitive efficiencies of pyridine and some of its derivatives have been studied in relation to the corrosion of Al (grade 1100) in 1%HCl at 25, 35, 45, and 55°C. The efficiencies increase in the order: pyridine, aniline, 2-picoline, 3-picoline, 4-picoline, 2 : 4-lutidine. The percentage inhibition efficiencies increase with the concentration of the inhibitors and decrease with increasing temperature, while the activation energy of corrosion is increased by increasing both the concentration and the temperature. The Langmuir adsorption iso therm equation is obeyed with some deviations by all inhibitors. All of the inhibitors are found to act predominantly on cathodic sites and are only partially effective on anodic sites.
机译:已经研究了吡啶及其一些衍生物在25%,35%,45%和55°C下与Al(1100级)在1%HCl中的腐蚀有关的抑制效率。效率按以下顺序增加:吡啶,苯胺,2-甲基吡啶,3-甲基吡啶,4-甲基吡啶,2:4-吡啶。缓蚀百分率随抑制剂浓度的增加而增加,随温度的升高而降低,而腐蚀的活化能随浓度和温度的增加而增加。所有抑制剂均遵守Langmuir吸附等温线方程,但有一些偏差。发现所有抑制剂主要作用于阴极位点,而仅部分作用于阳极位点。

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  • 来源
    《British Corrosion Journal》 |1999年第1期|51-56|共6页
  • 作者

    Yadav P.N.S.;

  • 作者单位

    The Department of Chemistry, Kendriya Vidyalaya, Mughalsarai, Chandauli, India;

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  • 正文语种 eng
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