Corrosion mitigation potential of N-(2-(2-pentadecyl-2,5-dihydro-1H-imidazol-1-yl)ethyl)palmitamide palmitate on Q235 steel in sulfuric acid: experimental and theoretical analysis

IF 2.2 4区 化学 Q2 Engineering
Kashif Rahmani Ansari, Ambrish Singh, Ismat H. Ali, Yuanhua Lin, Aeshah H. Alamri, Hala M. Abo-Dief
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Abstract

This work investigates the use of N-(2-(2-pentadecyl-2,5-dihydro-1H-imidazol-1-yl)ethyl)palmitamide palmitate (PIP) in 1 M H2SO4 solution as an anti-corrosive agent for Q235 steel. By using a range of methods including electrochemical tests, weight loss, scanning electron microscopy, atomic force microscopy, contact angler, and X-ray photoelectron spectroscopy were used for the analysis of PIP inhibition potential. The extract molecules formed an adherent and homogenous protective film on the MS surface. When the PIP concentration increased, a stronger inhibition effect against corrosive attack was obtained. The highest obtained inhibition efficiency is 97.65% at 100 mg/L PIP alone and 98.04% at 25 mg/L (PIP) + 0.5 mM potassium iodide. Polarization measurements showed the mixed type inhibitive nature of the PIP with cathodic dominancy. The various kinetic and thermodynamic parameters of metal dissolution and PIP adsorption processes were evaluated from the weight loss methods in order to elaborate the adsorption mechanism. Adsorption of inhibitor obeyed Langmuir adsorption isotherm. Furthermore, an active relationship involving PIP and the Q235 steel surface was highlighted by computational studies, such as density functional theory and molecular dynamics simulation that are demonstrating outstanding mitigation properties.

N-(2-(2-十五烷基-2,5-二氢-1H-咪唑-1-基)乙基)棕榈酰胺棕榈酸酯对 Q235 钢在硫酸中的腐蚀缓解潜力:实验和理论分析
本研究探讨了在 1 M H2SO4 溶液中使用 N-(2-(2-十五烷基-2,5-二氢-1H-咪唑-1-基)乙基)棕榈酰胺棕榈酸酯(PIP)作为 Q235 钢的抗腐蚀剂。采用电化学测试、失重、扫描电子显微镜、原子力显微镜、接触角器和 X 射线光电子能谱等一系列方法分析了 PIP 的抑制潜力。提取物分子在质谱表面形成了一层附着的均匀保护膜。当 PIP 浓度增加时,对腐蚀性侵蚀的抑制作用更强。单独使用 100 毫克/升 PIP 时,最高抑制效率为 97.65%;使用 25 毫克/升(PIP)+ 0.5 毫摩尔碘化钾时,最高抑制效率为 98.04%。极化测量结果表明,PIP 具有阴极占优势的混合型抑制性质。通过失重法评估了金属溶解和 PIP 吸附过程的各种动力学和热力学参数,以阐明吸附机理。抑制剂的吸附符合 Langmuir 吸附等温线。此外,通过计算研究,如密度泛函理论和分子动力学模拟,突出了 PIP 与 Q235 钢表面之间的活性关系,显示出出色的缓和特性。
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来源期刊
Chemical Papers
Chemical Papers Chemical Engineering-General Chemical Engineering
CiteScore
3.30
自引率
4.50%
发文量
590
期刊介绍: Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.
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