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首页> 外文期刊>RSC Advances >The synthesis and characterization of benzotriazole-based cationic surfactants and the evaluation of their corrosion inhibition efficiency on copper in seawater
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The synthesis and characterization of benzotriazole-based cationic surfactants and the evaluation of their corrosion inhibition efficiency on copper in seawater

机译：苯并三唑类阳离子表面活性剂的合成，表征及对海水中铜的缓蚀性能评价

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This study aims at preparing three cationic surfactants based on benzotriazole and evaluating their efficiencies as corrosion inhibitors for copper electrodes in seawater using different electrochemical techniques (potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and atomic force microscopy (AFM)). FTIR and ~(1) H NMR spectroscopic techniques confirmed the chemical structures of the as-prepared cationic compounds. The inhibition efficiency increased with the increase the concentration of the as-prepared compounds in the solution. The curves of the potentiodynamic polarization and the plots of EIS techniques show that the performance of all investigated compounds as mixed type. The standard free energy values imply that the three as-prepared compounds show physicochemical adsorption and obey the Langmuir adsorption model. AFM technique observed the reduction in the surface roughness due to the protective film formed on the copper surface. Finally, computational calculations show a great correlation with the experimental results due to the electron-donating effect.
机译：这项研究旨在制备三种基于苯并三唑的阳离子表面活性剂，并使用不同的电化学技术（电位动力学极化，电化学阻抗谱（EIS）和原子力显微镜（AFM））评估它们作为海水铜电极腐蚀抑制剂的效率。 FTIR和〜（1）H NMR光谱技术证实了所制备阳离子化合物的化学结构。抑制效率随着溶液中所制备化合物浓度的增加而增加。电位动力学极化曲线和EIS技术图表明，所有研究化合物的性能均为混合型。标准自由能值表明，三种制备的化合物均表现出物理化学吸附，并服从Langmuir吸附模型。 AFM技术观察到由于在铜表面上形成保护膜而导致的表面粗糙度的降低。最后，由于给电子效应，计算结果与实验结果有很大的相关性。

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