Abstract

Corrosion inhibition properties of benzotriazole were studied in 0.1 M hydrochloric acid solution for copper samples with different roughness levels using open-circuit potential, potentiodynamic polarization, electrochemical impedance, and weight loss measurements. According to the results, inhibition properties were improved because of an increase in surface roughness leading to an increase in inhibition efficiency (up to 99 and 91% for the rough and smooth surfaces, respectively). Adsorption of benzotriazole on copper surfaces follows Langmuir isotherm. Due to roughening, the adsorption free energy changed from ‒25.9 kJ mol^–1 for the polished samples to –27.6 kJ mol^–1 for the rough sample. Adsorption of the inhibitor on both surfaces was mainly physisorption. Adsorption entropy values for polished and shot-peened samples were 11.4 and 13 J mol^–1 K^–1, respectively. All data obtained from weight loss, Tafel polarization, and EIS tests were in good agreement. FTIR test, showed a peak between 740 and 745 cm^–1 that is associated with C–H bonds. The intensity of peak was higher in the case of shot-peened samples.

中文翻译：

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苯并三唑作为缓蚀剂在0.1 M盐酸溶液中对铜的腐蚀

摘要

使用开路电势，电势极化，电化学阻抗和失重测量，在0.1 M盐酸溶液中对不同粗糙度水平的铜样品研究了苯并三唑的缓蚀性能。根据结果​​，由于表面粗糙度的增加导致抑制效率的提高（对于粗糙和光滑的表面分别高达99％和91％），抑制性能得到改善。朗格缪尔等温线描述了苯并三唑在铜表面的吸附。由于粗化，吸附自由能-25.9千焦摩尔改变^-1的抛光样品-27.6千焦摩尔^-1对于粗糙的样品。抑制剂在两个表面上的吸附主要是物理吸附。抛光和喷丸样品的吸附熵值分别为11.4和13 J mol ^–1 K ^–1。从减肥，Tafel极化和EIS测试获得的所有数据都非常吻合。FTIR测试显示，在740至745 cm ^–1之间的峰与C–H键有关。喷丸样品的峰强度更高。