Fawzy Ahmed, Toghan Arafat, Alqarni Nada, Morad Moataz, Zaki Magdi E A, Sanad Moustafa M S, Alakhras Abbas I, Farag Ahmed A
Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia.
Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt.
Polymers (Basel). 2023 Feb 10;15(4):891. doi: 10.3390/polym15040891.
Herein, the inhibition impacts of chitin, pectin, and amylopectin as carbohydrate polymers on the corrosion of mild steel in 0.5 M HCl were researched utilizing various experimental and theoretical tools. The acquired outcomes showed that the inhibition efficiencies (% IEs) of the tested carbohydrate polymers were increased by raising their concentrations and these biopolymers acting as mixed-kind inhibitors with major anodic ones. The acquired % IEs values were reduced with rising temperature. The higher % IEs of the tested polymers were inferred via powerful adsorption of the polymeric molecules on the steel surface and such adsorption obeyed the Langmuir isotherm. The computed thermodynamic and kinetic quantities confirmed the mechanism of physical adsorption. The kinetics and mechanisms of corrosion and its protection by polymeric compounds were illuminated. The results obtained from all the techniques used confirmed that there was good agreement with each other, and that the % of IEs followed the sequence: chitin > amylopectin > pectin.
在此，利用各种实验和理论工具研究了几丁质、果胶和支链淀粉等碳水化合物聚合物对低碳钢在0.5 M HCl中腐蚀的抑制作用。所得结果表明，通过提高测试的碳水化合物聚合物的浓度，其缓蚀效率（%IEs）会增加，并且这些生物聚合物作为混合型缓蚀剂，主要起阳极抑制作用。随着温度升高，所得的%IEs值降低。通过聚合物分子在钢表面的强烈吸附推断出测试聚合物具有较高的%IEs，且这种吸附遵循朗缪尔等温线。计算得到的热力学和动力学量证实了物理吸附的机制。阐明了腐蚀及其被聚合物化合物保护的动力学和机制。使用的所有技术所获得的结果证实它们彼此之间具有良好的一致性，并且%IEs的顺序为：几丁质>支链淀粉>果胶。
