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首页> 外文期刊>International Journal of Electrochemical Science >Evaluation of some Nonionic Surfactants Derived from Hydroquinol Compounds as Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid
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Evaluation of some Nonionic Surfactants Derived from Hydroquinol Compounds as Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid

机译：盐酸氢醌化合物衍生的一些非离子表面活性剂作为碳钢缓蚀剂的评价

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摘要

The corrosion behavior of carbon steel in 1.0M HCl solution in the absence and presence of somenonionic surfactant derived from hydroquinol compounds was investigated using galvanostaticpolarization, electrochemical impedance spectroscopy and potentiodynamic anodic polarizationtechniques. The results of these techniques indicated that the percentage inhibition efficiency,increased with increasing the concentration of inhibitors and number of ethylene oxide unit.Polarization curves revealed that the studied inhibitors act as mixed type inhibitors. Inhibition wasinterpreted by the horizontal adsorption of inhibitors on the steel surface due to the presence of morethan one active center for adsorption. The adsorption process obeys Langmuir isotherms. Allimpedance spectra in the EIS technique exhibit one capacitive loop indicating a charge transferprocess, mainly controlling the corrosion of carbon steel. Double layer capacitances decrease withrespect to the blank solution when these inhibitors added due to the adsorption of these inhibitors onthe steel surface. It is also found that these compounds inhibit the pitting corrosion of carbon steel inchloride containing solutions by shifting the pitting potential into more noble direction.
机译：使用恒电流极化，电化学阻抗谱和电位动力学阳极极化技术研究了碳钢在1.0M HCl溶液中在不存在氢醌化合物衍生的某些非离子表面活性剂存在下的腐蚀行为。这些技术的结果表明，随着抑制剂浓度的增加和环氧乙烷单元数的增加，抑制效率的百分比也随之增加。极化曲线表明，所研究的抑制剂为混合型抑制剂。抑制作用是由于抑制剂在钢表面的水平吸附而引起的，这是因为存在一个以上的吸附活性中心。吸附过程遵循Langmuir等温线。 EIS技术中的所有阻抗谱均显示一个电容环，表明电荷转移过程，主要控制碳钢的腐蚀。当添加这些抑制剂时，由于空白抑制剂在钢表面的吸附，双层电容相对于空白溶液会降低。还发现这些化合物通过将点蚀电位移向更高的方向来抑制含氯化碳钢溶液的​​点蚀。

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