希夫碱衍生物在 HCl 环境中对低碳钢的缓蚀性能及其密度泛函理论研究。
Corrosion inhibition properties of schiff base derivative against mild steel in HCl environment complemented with DFT investigations.
机构信息
Materials Engineering Department, University of Technology-Iraq, P.O. Box: 10001, Baghdad, Iraq.
Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43000, Bangi, Selangor, Malaysia.
出版信息
Sci Rep. 2023 Jun 2;13(1):8979. doi: 10.1038/s41598-023-36064-w.
There is growing interest in using corrosion inhibitors and protective treatments to limit the degradation of mild steel, leading to the development of numerous Schiff bases as cutting-edge inhibitors. In this study, the effectiveness of a Schiff base, 3-((5-mercapto-1,3,4-thiadiazol-2-yl)imino)indolin-2-one (MTIO), to prevent mild steel corrosion in HCl was investigated using weight loss measurements, potentiodynamic polarization measurements, electrochemical impedance spectroscopy techniques, and surface characterization. The experimental results showed that 0.5 mM MTIO exhibited a satisfactory inhibitor efficiency of 96.9% at 303 K. The MTIO molecules physically and chemically adsorbed onto the mild steel surface following the Langmuir model, forming a compact protective film attributed to the presence of a thiazole ring in the MTIO structure. Theoretical calculations were combined with experimental techniques to investigate the anticorrosion performance and mechanism of inhibition.
人们越来越感兴趣地使用腐蚀抑制剂和保护处理来限制低碳钢的降解，从而导致了许多席夫碱作为前沿抑制剂的发展。在这项研究中，使用失重测量、动电位极化测量、电化学阻抗谱技术和表面表征研究了席夫碱 3-((5-巯基-1,3,4-噻二唑-2-基)亚氨基)吲哚啉-2-酮 (MTIO) 在 HCl 中防止低碳钢腐蚀的效果。实验结果表明，在 303 K 时，0.5 mM MTIO 的抑制效率达到 96.9%。MTIO 分子通过物理和化学吸附在低碳钢表面上，遵循 Langmuir 模型，形成了一个紧密的保护膜，这归因于 MTIO 结构中噻唑环的存在。理论计算与实验技术相结合，研究了抑制的防腐性能和机理。
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