The inhibitive impact of both kinds of 5-isothiocyanatomethyl-8-hydroxyquinoline derivatives on the corrosion of carbon steel in acidic electrolyte
作者:M. El Faydy、F. Benhiba、B. Lakhrissi、M. Ebn Touhami、I. Warad、F. Bentiss、A. Zarrouk
DOI:10.1016/j.molliq.2019.111629
日期:2019.12
identified by various spectroscopic methods (IR, NMR and Elemental analysis). The inhibitive action of 5-isothiocyantomethyl-8-hydroxyauinoline derivatives against the corrosion of carbon steel corrosion in 1 M HCl environment was examined using the conventional electrochemical, gravimetric, UV − visible spectroscopy, SEM observations and theoretical calculation methods. The results finding indicate that
In situ synthesis, electrochemical, surface morphological, UV–visible, DFT and Monte Carlo simulations of novel 5-substituted-8-hydroxyquinoline for corrosion protection of carbon steel in a hydrochloric acid solution
作者:M. El Faydy、B. Lakhrissi、A. Guenbour、S. Kaya、F. Bentiss、I. Warad、A. Zarrouk
DOI:10.1016/j.molliq.2019.01.105
日期:2019.4
solution usingelectrochemical techniques, UV − visible and SEM at 298 K. Electrochemical measurements showed that these organiccompounds are mixed type inhibitors. The adsorption of both inhibitors on the carbon steel surface followed Langmuir adsorptionisotherm. Furthermore, DFT calculations and Monte Carlo simulation were performed to theoretically establish the relationship between molecular structure
已成功合成了两种基于8-羟基喹啉的新型有机化合物,并通过FT-IR,1H,13和FT-IR对其进行了表征1 H NMR和元素分析。合成的化合物是(((8-羟基喹啉-5-基)-甲基)-氨基甲酸叔丁酯(BHQC)和3-((((8-羟基喹啉-5-基)-甲基)-氨基)-氨基)-3-氧代丙酸乙酯(EHQP)在1 M HCl溶液中使用电化学技术,UV-可见光和298 K的SEM作为碳钢(CS)的缓蚀剂进行了评估。电化学测量表明,这些有机化合物是混合型缓蚀剂。两种抑制剂在碳钢表面的吸附均遵循Langmuir吸附等温线。此外,进行了DFT计算和蒙特卡洛模拟,从理论上建立了分子结构与抑制效率之间的关系。
Novel Cu (II) and Zn (II) complexes of 8-hydroxyquinoline derivatives as effective corrosion inhibitors for mild steel in 1.0 M HCl solution: Computer modeling supported experimental studies
作者:M. Rbaa、Ashraf S. Abousalem、M. Ebn Touhami、I. Warad、F. Bentiss、B. Lakhrissi、A. Zarrouk
DOI:10.1016/j.molliq.2019.111243
日期:2019.9
characterized novel complexes of copper (II) and zinc (II). These complexes were obtained by reacting of 5-azidomethyl-8-hydroxyquinoline with copperchloridedihydrate and zinc chloridedihydrate. The isolated complexes were characterized by UV–visible spectroscopy (UV–Vis), Elemental analysis (EA), Infrared (IR), Mass spectrometry (MS) and 1H and 13C Nuclear Magnetic Resonance (NMR). These complexes were
在这项工作中,我们合成并表征了铜(II)和锌(II)的新型配合物。这些配合物是通过使5-叠氮基甲基-8-羟基喹啉与二水合氯化铜和二水合氯化锌反应而获得的。分离的复合物通过紫外-可见光谱(UV - Vis),元素分析(EA),红外(IR),质谱(MS)以及1 H和13 C核磁共振(NMR)进行表征)。通过实验和理论研究,对这些络合物作为低碳钢在1.0 M HCl中的缓蚀剂进行了测试。用扫描电子显微镜结合色散能量分析(SEM-EDAX)对腐蚀前后的钢表面进行了表征,并用紫外可见光谱法分析了重量溶液。电化学和理论研究的结果以及钢的表面分析结果表明,这两种配合物在1.0 M HCl中对钢的保护均有效,但高温配合物的作用减弱,此外,这些配合物还被吸附到金属表面。朗缪尔等温线后的钢表面。
A combined experimental and theoretical approach to the elucidation of the corrosion inhibition property of 5-((4,5-dihydro-4-o-tolyltetrazol-1-yl)methyl)quinolin-8-ol for C22E steel in aggressive environment
作者:H. About、M. El Faydy、F. Benhiba、Arej S. Al-Gorair、B.A. Al Jahdaly、H. Zarrok、H. Oudda、B. Lakhrissi、I. Warad、M. Abdallah、A. Zarrouk
DOI:10.1016/j.inoche.2023.110537
日期:2023.4
applied as a potential corrosion inhibitor for carbon steel (C22E) in molar hydrochloric acid (1 M HCl). The effect of TTQ on the corrosion of C22E steel in 1 M HCl was assessed using empirical and experimental methods. According to research, the effectiveness of inhibition increased with increasing TTQ concentration, peaked at 91.7% at 0.001 M, and then decreased further as temperature increased. The
Anti-corrosion performance of 8-hydroxyquinoline derivatives for mild steel in acidic medium: Gravimetric, electrochemical, DFT and molecular dynamics simulation investigations
The anti-corrosion potency of three synthesized 8-hydroxyquinoline derivatives, namely 5-(azidomethyl)-7-(morpholinomethyl)quinolin-8-ol (HM1), 2-(8-hydroxy-7-(morpholinomethyl)quinolin-5-yl)acetonitrile (HM2), 5-(azidomethyl)-7-(piperidin-1-ylmethyl)quinolin-8-ol (HM3) in hydrochloric acid for mild steel was investigated using weight loss and electrochemical techniques. Potentiodynamic polarization (PDP) data reveal that all three compounds were cathodic inhibitors, with HM3 presentation significant mixed-type effect at high inhibitor concentrations (10(-3) M). Electrochemical impedance spectroscopy (EIS) data reveal better adsorption of compounds species on MS surface at increased inhibitor concentrations with HM1, HM2 and HM3 reaching a maximum efficiency of 90, 89 and 88%. The three compounds HM1, HM2 and HM3 were inclined towards the Langmuir adsorption-isotherm by spontaneous chemical-physical adsorptions of inhibitors on the mild steel surface. The correlation between the electronic properties and inhibition efficacies of the tilted inhibitors was determined by using simple linear regression technique. Electronic properties were calculated for neutral and protonated forms in a polarizable continuum model using the DFT method at the B3LYP/6-311 + G (d, p) level of theory. The active adsorbed sites of HM1-HM3 on the metal surface were determined by analyzing their corresponding electrostatic surface potentials (ESP). Furthermore, molecular dynamics simulations have been performed to illustrate the most conceivable adsorption configuration between the inhibitors and metal surface. (C) 2020 Published by Elsevier B.V.