Hu Zhen, Yi Fen, Yu Hailian
School of Chemical Engineering, Sichuan University of Science & Engineering Sichuan P. R. China
Sichuan Vocational College of Chemical Technology Sichuan P. R. China.
RSC Adv. 2025 Apr 28;15(17):13431-13441. doi: 10.1039/d4ra09103e. eCollection 2025 Apr 22.
Idesia oil-based imidazoline derivative (IOID) as a corrosion inhibitor was synthesized through the solvent dehydration method for Q235 steel in HCl solution. It was characterized by FTIR, and the corrosion inhibition performance was evaluated by static weight loss testing and electrochemical measurements. The corrosion inhibition mechanism of IOID was also investigated. The results indicated that the optimized synthetic method for IOID involved a 1 : 1 molar ratio of imidazoline intermediate to quaternization reagent, under a quaternization reaction temperature of 80 °C and a quaternization reaction time of 2 h. The inhibition efficiency of over 99.07% was achievable when 40 ppm IOID was applied in 1 M HCl solution at 80 °C, even after the inhibitor was used for one week. The corrosion inhibition mechanism involved the corrosion products covering the steel substrate surface and forming a dense protective film. Physical adsorption occurred on the steel substrate surface, which played a protective role for Q235 steel.
通过溶剂脱水法合成了用于Q235钢在盐酸溶液中的腐蚀抑制剂——山桐子油基咪唑啉衍生物（IOID）。采用傅里叶变换红外光谱（FTIR）对其进行了表征，并通过静态失重试验和电化学测量对其缓蚀性能进行了评价。还研究了IOID的缓蚀机理。结果表明，IOID的优化合成方法为咪唑啉中间体与季铵化试剂的摩尔比为1∶1，季铵化反应温度为80℃，季铵化反应时间为2 h。在80℃的1 M盐酸溶液中加入40 ppm的IOID，即使抑制剂使用一周后，缓蚀效率仍可达到99.07%以上。缓蚀机理包括腐蚀产物覆盖在钢基体表面并形成致密的保护膜。在钢基体表面发生物理吸附，对Q235钢起到保护作用。
