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Pyrimidine-2-thione derivatives as corrosion inhibitors for mild steel in acidic environments

机译:嘧啶-2-硫酮衍生物作为酸性环境中低碳钢的腐蚀抑制剂

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摘要

The inhibition of mild steel corrosion in 1.0 M sulphuric acid by pyrimidine-2-thione derivatives (4,6-diphenyl-3,4-dihydropyrimidine-2(1H)-thione (PTH); 4-(4-methylphenyl)-6-phenyl-3,4-dihydropyrimidine-2(1H)-thione (PTM) and 4-(4-methoxyphenyl)-6-phenyl-3,4-dihydropyrimidine-2(1H)-thione (PTMO)) has been investigated using weight loss and electrochemical techniques (potentiodynamic polarization and electrochemical impedance spectroscopy (EIS)). All the compounds effectively hindered the corrosion process by becoming adsorbed on the metal surface, following the Langmuir isotherm. Computational studies were undertaken to provide mechanistic insight into the roles of the different substituents on the corrosion inhibition and adsorption behavior of the studied compounds.
机译:嘧啶-2-硫酮衍生物(4,6-二苯基-3,4-二氢嘧啶-2(1H)-硫酮(PTH); 4-(4-甲基苯基)-6对1.0 M硫酸中低碳钢腐蚀的抑制作用已研究了-苯基-3,4-二氢嘧啶-2(1H)-硫酮(PTM)和4-(4-甲氧基苯基)-6-苯基-3,4-二氢嘧啶-2(1H)-硫酮(PTMO))使用重量损失和电化学技术(电动力极化和电化学阻抗谱(EIS))。在朗格缪尔等温线之后,所有化合物都被吸附在金属表面上,从而有效地阻止了腐蚀过程。进行了计算研究,以提供有关不同取代基对所研究化合物的腐蚀抑制和吸附行为的作用的机械机理见解。

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