Department of Chemistry, College of Science and Arts, Jouf University, Qurayyat 75911, Saudi Arabia.
Chemistry Department, Faculty of Science, Benha University, Benha 13518, Egypt.
Molecules. 2023 May 4;28(9):3872. doi: 10.3390/molecules28093872.
In light of the variety of industrial uses and economic relevance of mild steel, corrosion resistance is a serious topic. Utilization of inhibitors serves as one of the most essential methods for corrosion control. Two thiadiazole compounds, namely, 2-amino-5-(4-bromobenzyl)-1,3,4-thiadiazole () and 2-amino-5-(3-nitrophenyl)-1,3,4-thiadiazole (), were synthesized. The structure of the prepared compounds was verified by Fourier transform infrared spectroscopy (FTIR) and proton and carbon-13 nuclear magnetic resonance spectroscopy (H NMR and C NMR). In a 0.50 M HSO solution, the effectiveness of two synthetic thiadiazole derivatives as mild steel corrosion inhibitors were investigated. In this evaluation, various electrochemical methodologies have been utilized, such as potentiodynamic polarization, open circuit potential (OCP), and electrochemical impedance spectroscopy (EIS). The results confirm the efficiency of the inhibition increases by raising concentrations of and . The inhibitory behavior was explained by the notion that the adsorption of thiadiazole molecules, and on the surface of mild steel causes a blockage of charge and mass transfer, protecting the mild steel from offensive ions. Furthermore, the synthesized molecules and were analyzed using density functional theory (DFT).
鉴于中碳钢的多种工业用途和经济重要性，耐腐蚀性是一个严重的问题。抑制剂的使用是腐蚀控制的最重要方法之一。合成了两种噻二唑化合物，即 2-氨基-5-(4-溴苄基)-1,3,4-噻二唑()和 2-氨基-5-(3-硝基苯基)-1,3,4-噻二唑()。通过傅里叶变换红外光谱(FTIR)和质子和碳-13 核磁共振光谱(H NMR 和 C NMR)验证了所制备化合物的结构。在 0.50 M HSO 溶液中，研究了两种合成噻二唑衍生物作为中碳钢缓蚀剂的有效性。在这种评估中，使用了各种电化学方法，如动电位极化、开路电位 (OCP) 和电化学阻抗谱 (EIS)。结果证实，随着浓度的升高，和的抑制效率增加。抑制行为是通过噻二唑分子、和在中碳钢表面的吸附来解释的，这种吸附会阻止电荷和质量转移，从而保护中碳钢免受侵蚀性离子的侵害。此外，还使用密度泛函理论(DFT)对合成的分子和进行了分析。
