硫脲基烷基咪唑啉类缓蚀剂的制备、缓蚀性能及其机理  

Synthesis of Thioureido-Alkyl Imidazoline Inhibitors and Their Inhibition Performance and Mechanism

作　　者：张光华[1] 王腾飞[1] 孙卫玲[1] 董惟昕[1] 费菲[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《材料保护》2011年第2期21-23,58,共4页Materials Protection

基　　金：陕西省教育厅重点实验室项目(09JS061);陕西科技大学研究生创新基金资助项目

摘　　要：过去,就咪唑啉类化合物引入硫脲基后对钢材缓蚀性能的影响研究报道较少。以有机酸(戊酸、羊蜡酸、油酸)、二乙烯三胺、氯化苄和硫脲为原料,合成了3种硫脲基烷基咪唑啉类季铵盐化合物。将Q235碳钢全浸在80℃的1 mol/L HCl溶液中,利用静态失重法和极化曲线法,研究了硫脲基烷基咪唑啉型季铵盐的缓蚀性能及其机理。结果表明:硫脲基烷基咪唑啉季铵盐化合物是一种以抑制阳极为主的混合型缓蚀剂,其中,硫脲基羊蜡酸咪唑啉型缓蚀剂的缓蚀效果明显优于其他2种,缓蚀率可达96%以上。Three kinds of quaternary ammonium salts of thioureido-alkyl imidazoline were synthesized using organic acid(valeric acid,caprylic acid,oleic acid),diethylenetriamine,benzyl chloride and thiourea as the raw materials.The corrosion inhibition performance of resultant quaternary ammonium salts of thioureido-alkyl imidazoline for Q235 steel immersed in 1 mol/L HCl at 80 ℃ was evaluated using static weight loss method and polarization curve method.The inhibition mechanism of the inhibitors was discussed.Results show that as-synthesized quaternary ammonium salts of thioureido-alkyl imidazoline are mixed inhibitors dominated by anodic inhibition.Of the three kinds of inhibitors,the quaternary ammonium salt of thioureido-caprylic acid imidazoline had the best inhibition performance,showing an inhibition rate of above 96%.

关 键 词：缓蚀剂 硫脲基烷基咪唑啉季铵盐 Q235碳钢 缓蚀率 静态失重法 极化曲线法 

分 类 号：TG174.42[金属学及工艺—金属表面处理]