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The study of aluminium corrosion in acidic solution with nontoxic inhibitors

机译:无毒抑制剂在酸性溶液中铝腐蚀的研究

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The inhibitory activity of some substituted N-arylpyrroles on aluminium corrosion in hydrochloric acid was studied in relation to inhibitor concentration, using potentiodynamic and impedance spectroscopy techniques. All investigated compounds were found to act as cathodic-type inhibitors and inhibition was ascribed to the adsorption of inhibitor onto the electrode surface. The inhibiting efficiency of the additives depended on the inductive power of the groups attached to the benzene and/or pyrrole ring. The carbaldehyde group showed better inhibiting power due to additional condensation on the electrode surface. The impedance results analysed in terms of the polarization resistance showed that the EIS technique can be successfully applied in the determination of corrosion resistance in systems where the corrosion kinetics are not simple. [References: 36]
机译:利用电位动力学和阻抗谱技术研究了一些取代的N-芳基吡咯对盐酸中铝腐蚀的抑制作用与抑制剂浓度的关系。发现所有研究的化合物均充当阴极型抑制剂,抑制作用归因于抑制剂在电极表面上的吸附。添加剂的抑制效率取决于与苯和/或吡咯环相连的基团的感应功率。由于电极表面上的额外缩合,甲醛基显示出更好的抑制能力。根据极化电阻分析阻抗结果表明,EIS技术可以成功地用于腐蚀动力学不简单的系统中确定抗腐蚀能力。 [参考:36]

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