8-Hydroxyquinoline based chitosan derived carbohydrate polymer as biodegradable and sustainable acid corrosion inhibitor for mild steel: Experimental and computational analyses.,International Journal of Biological Macromolecules

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8-Hydroxyquinoline based chitosan derived carbohydrate polymer as biodegradable and sustainable acid corrosion inhibitor for mild steel: Experimental and computational analyses.
International Journal of Biological Macromolecules ( IF 7.7 ) Pub Date : 2020-03-26 , DOI: 10.1016/j.ijbiomac.2020.03.200
M Rbaa ₁ , M Fardioui ₂ , Chandrabhan Verma ₃ , Ashraf S Abousalem ₄ , M Galai ₅ , E E Ebenso ₆ , T Guedira ₂ , B Lakhrissi ₁ , I Warad ₇ , A Zarrouk ₈

Affiliation

Laboratory of Agro-Resources, Polymers and Process Engineering, Department of Chemistry, Faculty of Science, Ibn Tofail University, PO Box 133, 14000 Kenitra, Morocco.
Laboratory of Materials, Electrochemistry and Environment, Ibn Tofail University, Faculty of Sciences, Kenitra, Morocco.
Center of Research Excellence in Corrosion, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia; Department of Chemistry, School of Chemical & Physical Sciences and Material Science, Innovation & Modelling (MaSIM) Research Focus Area, Faculty of Agriculture, Science and Technology, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho 2735, South Africa.
Chemistry Department, Faculty of Sciences, Mansoura University, El-Mansoura 35516, Egypt; Quality Control Laboratory, Operations Department, JOTUN, Egypt.
Laboratory of Materials Engineering and Environment: Application and Modeling, Faculty of Sciences, Ibn Tofail University, PO Box 133, 14000 Kénitra, Morocco.
Department of Chemistry, School of Chemical & Physical Sciences and Material Science, Innovation & Modelling (MaSIM) Research Focus Area, Faculty of Agriculture, Science and Technology, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho 2735, South Africa.
Department of Chemistry and Earth Sciences, PO Box 2713, Qatar University, Doha, Qatar.
Laboratory of Materials, Nanotechnology and Environment, Mohammed V University, Faculty of Sciences, P.O. Box. 1014, Rabat, Morocco.

The present study reports the synthesis, characterization and corrosion inhibition effects of chitosan (CH) and its 5-chloromethyl-8-hydroxyquinoline derivative (CH-HQ) for mild steel in acidic medium. The synthesized CH-HQ was characterized using 1H NMR and FT-IR spectroscopic methods. Corrosion inhibition efficiencies of CH and CH-HQ were measured using electrochemical and chemical techniques. The surface protection ability of the inhibitor molecules was also ascertained by surface analysis, while computational study was used to further justify the adsorption tendencies of the molecules on mild steel surface. CH-HQwasobserved to exhibit better protection efficiency than CH, as the highest inhibition efficiencies were recorded to be 78% and 93% for CH and CH-HQ, respectively. Potentiodynamic polarization studies revealed that CH and CH-HQ are mixed-type corrosion inhibitors over the studied temperature range (298 K ± 1 to 328 K ± 1). SEM-EDS studies were performed to demonstrate the adsorption of CH and CH-HQ on the mild steel surface. Adsorption behavior of the CH and CH-HQ was also supported by UV-visible (UV-vis) spectrophotometric analyses. Monte Carlo simulations (MC) and density functional theory (DFT) calculations were carried out to corroborate the experimental results.

中文翻译：

8-羟基喹啉基壳聚糖衍生的碳水化合物聚合物作为低碳钢的可生物降解和可持续酸腐蚀抑制剂：实验和计算分析。

本研究报告了壳聚糖 (CH) 及其 5-氯甲基-8-羟基喹啉衍生物 (CH-HQ) 在酸性介质中对低碳钢的合成、表征和缓蚀作用。使用 1 H NMR 和 FT-IR 光谱法对合成的 CH-HQ 进行表征。使用电化学和化学技术测量了 CH 和 CH-HQ 的腐蚀抑制效率。还通过表面分析确定了抑制剂分子的表面保护能力，同时使用计算研究进一步证明了分子在低碳钢表面的吸附趋势。观察到 CH-HQ 表现出比 CH 更好的保护效率，因为 CH 和 CH-HQ 的最高抑制效率分别为 78% 和 93%。动电位极化研究表明，在所研究的温度范围（298 K ± 1 至 328 K ± 1）内，CH 和 CH-HQ 是混合型缓蚀剂。进行 SEM-EDS 研究以证明 CH 和 CH-HQ 在低碳钢表面的吸附。紫外-可见 (UV-vis) 分光光度分析也支持 CH 和 CH-HQ 的吸附行为。进行了蒙特卡罗模拟 (MC) 和密度泛函理论 (DFT) 计算以证实实验结果。

更新日期：2020-03-27

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