咪唑啉季铵盐缓蚀剂的合成及缓蚀行为的研究  

The Synthesis and Corrosion Inhibition Mechanism Research of the Imidazoline Corrosion Inhibitor

作　　者：龙小柱[1] 周荣星[1] 刘婧雯[1] 杜晴晴 季栋奇 

机构地区：[1]沈阳化工大学化学工程学院,辽宁沈阳110142

出　　处：《全面腐蚀控制》2015年第11期72-78,共7页Total Corrosion Control

基　　金：辽宁省教育厅高等学校科学研究项目(L2013169)

摘　　要：本文以复合固体酸作催化剂,以油酸、二乙烯三胺、氯化苄为主要原料合成了咪唑啉季铵盐。用静态失重法、动电位极化曲线法、电化学阻抗法研究其在15%盐酸溶液中对A3钢的缓蚀性能。实验结果表明,缓蚀剂的缓蚀效率随着缓蚀剂浓度的增加而增加但随着温度的升高而减小。缓蚀剂浓度为10g/L时,用静态失重法测其在60℃15%盐酸溶液中的缓蚀效率为99.18%,当缓蚀剂与KI复配时,两者产生良好的协同效应:缓蚀剂与KI质量比为5:1的时候,缓蚀效率为99.7%。该缓蚀剂在A3钢表面的吸附遵循Langmuir吸附等温模型。动电位极化曲线测试表明该缓蚀剂是以抑制阴极为主的混合型缓蚀剂。In the present investigation, Imidazoline quaternary ammonium salt was synthesized from oleic acid ,diethylenetriamine and benzyl chloride catalyzed by composite solid acid as the catalys and investigated as inhibitor for A3 mild steel corrosion in 15% HC1 solution using the weight loss, electrochemical polarization, and electrochemical impedance spectroscopy （EIS） techniques. It was found that the inhibition efficiency of studied inhibitor increased with an increase in inhibitor concentration but decreased with an increase in temperature. Corrosion inhibition efficiency of 99.18% was obtained with 10 grams per liter of the inhibitor at 60~C in 15% hydrochloric acid. Good synergistic effect was produced between the inhibitor and potassium iodide：With mass ratio of 5 to 1, the corrosion inhibition efficiency increased to 99.7% in the same test condition.The adsorption of the inhibitor on the A3 mild steel surface in acid solution was found to obey the Langmuir adsorption isotherm. Polarization studies showed that the inhibitor was of mixed type with predominant cathodic control over the reaction.

关 键 词：咪唑啉季铵盐 缓蚀剂 缓蚀行为 复配 

分 类 号：TG174.42[金属学及工艺—金属表面处理]