Timoudan N, Al-Gorair Arej S, El Foujji L, Warad I, Safi Z, Dikici B, Benhiba F, Qaiss A El Kacem, Bouhfid R, Bentiss F, Al-Juaid Salih S, Abdallah Metwally, Zarrouk A
Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University in Rabat P. O. Box. 1014 Rabat Morocco
Chem. Depart., College of Science., Princess Nourah bint Abdulrahman Univ. Riyadh Saudi Arabia
RSC Adv. 2024 Sep 23;14(41):30295-30316. doi: 10.1039/d4ra05070c. eCollection 2024 Sep 18.
This paper presents a comprehensive study on the corrosion inhibition properties of new organic compounds, (1-benzimidazol-2-yl)methanethiol (LF) and 1-dodecyl-2-((dodecylthio)methyl)-1-benzimidazole (LF), have been examined for inhibiting of Carbon-Steel (C.S) in 1.0 M HCl. Numerous methods, such as potentiodynamic polarization, electrochemical impedance spectroscopy, scanning electron microscopy (SEM) and Energy Dispersive X-ray (EDX) analysis, atomic force microscopy (AFM), contact angle measurements, UV-visible spectroscopy, and theoretical calculations, were used to evaluate the effectiveness in preventing corrosion. The two benzimidazoles (LF and LF)' inhibitory efficacy rose as their concentration increased, peaking at 88.2% and 95.4% respectively. The polarization graphs show a mixed behavior, with anodic predominance for LF and cathodic predominance for LF. Thermodynamic investigations showed that the values of Δ were -40.0 kJ mol for LF and -43.1 kJ mol for LF, highlighting their strong adsorption onto the metal surface. Their adsorption process was in line with the Langmuir isotherm. Density Functional Theory (DFT) and Molecular Dynamics (MD) modeling have been utilized to examine and clarify the relationship between the inhibitor and carbon steel (C.S).
本文对新型有机化合物（1-苯并咪唑-2-基）甲硫醇（LF）和1-十二烷基-2-（（十二烷基硫基）甲基）-1-苯并咪唑（LF）在1.0 M盐酸中对碳钢（C.S）的缓蚀性能进行了全面研究。采用了多种方法，如动电位极化、电化学阻抗谱、扫描电子显微镜（SEM）和能量色散X射线（EDX）分析、原子力显微镜（AFM）、接触角测量、紫外可见光谱以及理论计算，来评估其防腐蚀效果。两种苯并咪唑（LF和LF）的缓蚀效率随浓度增加而提高，分别在88.2%和95.4%时达到峰值。极化曲线显示出混合行为，LF以阳极为主，LF以阴极为主。热力学研究表明，LF的Δ值为-40.0 kJ/mol，LF的Δ值为-43.1 kJ/mol，突出了它们在金属表面的强吸附。它们的吸附过程符合朗缪尔等温线。利用密度泛函理论（DFT）和分子动力学（MD）建模来研究和阐明缓蚀剂与碳钢（C.S）之间的关系。
