在1M HCl中使用实验和理论工具,作为碳钢腐蚀抑制剂的基于酸盐的新型表面活性剂
Samir A Abd El-Maksoud1, Mohamed A Migahed2, Mahmoud M Gouda3
1Chemistry Department, Faculty of Science, Port-Said University, Port-Said, Egypt. samirabdelhady@yahoo.com.
Scientific reports
|May 20, 2025
概括
两种基于 thiazole 的新型 Gemini 阴阳性表面活性剂 (TAC) 有效抑制碳钢在 HCl 中的腐蚀. 它们的效率随着度的增加而增加,并与特定的金属化物协同作用,形成保护膜.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 腐蚀科学 腐蚀科学
背景情况:
- 碳钢在酸性介质中的腐蚀给工业带来了重大挑战.
- 有效的抗腐蚀化合物对于材料的寿命和安全至关重要.
研究的目的:
- 评价两种新型的双子电离表面活性剂,这些表面活性剂是从 thiazole (TAC) 中衍生出来的,作为碳钢在 1 M HCl 中的腐蚀抑制剂.
- 用各种实验和计算技术阐明抑制机制.
主要方法:
- 使用质量损失 (ML) 和电化学技术 (潜在动力极化 - PP,电化学阻抗光谱 - EIS) 评估了腐蚀抑制.
- 使用扫描电子显微镜 (SEM),能量分散X射线 (EDX) 和里埃变换红外光谱 (FTIR) 进行了表面表征.
- 计算分析采用密度函数理论 (DFT).
主要成果:
- 这两种TAC抑制剂都显示出显著的腐蚀保护,抑制效率随度增加而增加.
- 在50 ppm下,TAC 6的最佳抑制达到79%,TAC 18的最佳抑制达到87%.
- 吸附遵循兰格穆尔等温法,表明混合的物理吸收和化学吸收.
- 与CuCl2,MnCl2和CoCl2观察到协同效应,在CuCl2.2的存在下,抑制率提高到96% (TAC6) 和97% (TAC18).
结论:
- 基于醇的Gemini电离表面活性剂是有效的阴极和混合型腐蚀抑制剂,用于碳钢在HCl中的腐蚀.
- 抑制剂通过吸附在钢面上形成保护膜.
- 与特定的金属化物的协同作用显著提高了抗腐蚀性能.
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