Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai, 264209, PR China.
Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai, 264209, PR China; Weihai Chuanghui Environmental Protection Technology Co., Ltd., Weihai, 264200, PR China.
Carbohydr Polym. 2021 May 15;260:117842. doi: 10.1016/j.carbpol.2021.117842. Epub 2021 Feb 20.
The development of effective and environment-friendly corrosion inhibitors is of great significance for the protection of mild steel in hydrochloric acid media. Accordingly, a natural polysaccharide mixture inhibitor composed of chondroitin sulfate derived from pig cartilage (CS-PC) and sodium alginate (SA) is developed here, and the synergistic effect of the two polysaccharides towards adsorption on mild steel in 1 M HCl is studied. The inhibition performance has been studied using weight loss test, electrochemical investigations, SEM, SECM and UV methods. The results indicate that the mixtures of CS-PC and SA strongly inhibit the corrosion of mild steel compared to individual inhibitors (i.e., 95.18 % versus 72.78 %), and show a synergistic inhibition effect. The structure-activity relationship between the molecular structure of the CS-PC + SA mixture and its corrosion inhibition performance has been discussed by using the quantum chemistry calculation and molecular dynamics simulations. It is believed that these results have certain guiding significance for the rational design of efficient corrosion inhibitor.
开发有效且环保的缓蚀剂对于保护盐酸介质中的低碳钢具有重要意义。因此，本研究开发了一种由猪软骨来源的硫酸软骨素（CS-PC）和海藻酸钠（SA）组成的天然多糖混合物抑制剂，并研究了两种多糖在 1 M HCl 中对低碳钢吸附的协同作用。通过失重试验、电化学研究、SEM、SECM 和 UV 方法研究了抑制性能。结果表明，与单独的抑制剂相比（即 95.18%比 72.78%），CS-PC 和 SA 的混合物强烈抑制低碳钢的腐蚀，表现出协同抑制作用。通过量子化学计算和分子动力学模拟，讨论了 CS-PC+SA 混合物的分子结构与其缓蚀性能之间的构效关系。相信这些结果对高效缓蚀剂的合理设计具有一定的指导意义。
