El-Nahass Marwa N, Fayed Tarek A, El-Gamil Mohammed M, Fouda Abd El-Aziz S
Department of Chemistry, Faculty of Science, Tanta University, Tanta, 31527, Egypt.
Department of Toxic and Narcotic Drug, Forensic Medicine, Mansoura Laboratory, Medico Legal Organization, Ministry of Justice, Mansoura, 35516, Egypt.
BMC Chem. 2024 Oct 5;18(1):193. doi: 10.1186/s13065-024-01298-w.
The current work looks at the inhibitory effects of a diolefinic dye, namely 1,4-bis((E)-2-(3-methyl-2,3-dihydrobenzo[d]thiazol-2-yl) vinyl) benzene iodide salt, in relation to CS corrosion mitigation in hydrochloric acid (HCl) environment. This study uses a variety of experimental methodologies, including weight loss (WL) analysis, electrochemical tests, and theoretical considerations. The synergistic effect of diolefinic dye and AgNPs on the corrosion inhibition of CS in 1 M HCl was investigated. The inhibition efficiency (IE) displays a notable enhancement as the concentration of the dye is elevated and as the temperature raises the IE increases. The diolefinic dye exhibited % IE of 83% even at low concentration (1 × 10 M) whereas 90% in the presence of (2.26 × 10) AgNPs. Tafel graphs demonstrate that the dye follows a mixed type inhibitor. The adsorption of the dye on CS surface follows Langmuir model. Moreover, the influence of temperature and the activation parameters disclose that diolefinic dye is chemisorbed on the CS surface. The synergistic coefficient of the diolefinic dye and AgNPs under various concentration conditions was greater than unity. The surface morphology of CS sheets was confirmed by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX). Density Functional Theory (DFT) calculations provide theoretical support for the inhibitory effects of the examined dye. Notably, there is a high agreement between the findings of practical studies and theoretical expectations.
当前的工作研究了一种二烯烃染料，即1,4-双((E)-2-(3-甲基-2,3-二氢苯并[d]噻唑-2-基)乙烯基)苯碘盐，在盐酸（HCl）环境中对碳钢（CS）腐蚀减缓的抑制作用。本研究采用了多种实验方法，包括失重（WL）分析、电化学测试和理论考量。研究了二烯烃染料和银纳米颗粒（AgNPs）对1 M HCl中碳钢腐蚀抑制的协同效应。随着染料浓度的升高，缓蚀效率（IE）显著提高，并且随着温度升高，IE也增加。即使在低浓度（1×10⁻⁵ M）下，二烯烃染料的缓蚀效率也达到了83%，而在存在（2.26×10⁻⁵）AgNPs的情况下，缓蚀效率为90%。塔菲尔曲线表明该染料属于混合型缓蚀剂。染料在碳钢表面的吸附遵循朗缪尔模型。此外，温度的影响和活化参数表明二烯烃染料化学吸附在碳钢表面。在各种浓度条件下，二烯烃染料和AgNPs的协同系数大于1。通过扫描电子显微镜（SEM）和能量色散X射线分析（EDX）确定了碳钢片的表面形貌。密度泛函理论（DFT）计算为所研究染料的抑制作用提供了理论支持。值得注意的是，实际研究结果与理论预期高度一致。
