硫脲基咪唑啉季铵盐的合成及其缓蚀作用  

Synthesis and Inhibition Performances of Imidazoline Quaternary Ammonium Salts Containing Thioureido Group

作　　者：王腾飞[1] 张光华[1] 王帆[1] 魏辉[1] 孙卫玲[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,西安710021

出　　处：《应用化学》2010年第11期1291-1295,共5页Chinese Journal of Applied Chemistry

基　　金：陕西省教育厅重点实验室项目(09JS061)

摘　　要：用戊酸、羊蜡酸、油酸、二乙烯三胺、氯化苄和硫脲为原料,合成了6种咪唑啉季铵盐化合物。采用静态失重法和极化曲线法,比较了硫脲基烷基咪唑啉型季铵盐和烷基咪唑啉型季铵盐在80℃、1mol/L的HCl溶液中对碳钢的缓蚀性能,研究了这两类缓蚀剂与无机阴离子和阴离子表面活性剂的协同作用。结果表明,硫脲基烷基咪唑啉季铵盐类的缓蚀效果明显优于烷基咪唑啉季铵盐类,硫脲基羊脂酸咪唑啉缓蚀剂的缓蚀率可达98.3%。当以羊脂酸、二乙烯三胺、氯化苄和硫脲为原料合成的硫脲基烷基咪唑啉型季铵盐化合物与I-质量比为1:1复配时,缓蚀效果最佳,比单独使用硫脲基烷基咪唑啉季铵盐化合物的缓蚀率提高了1.5%。Six different imidazoline quaternary ammonium salts were synthesized with the use of valeric acid,decanoic acid,oleic acid,diethylenetriamine,benzyl chloride and thiourea as raw materials.The corrosion inhibition performances of quaternary ammonium salts of thioureido alkyl imidazoline and alkyl imidazoline on carbon steel in 1.0 mol/L HCl medium were compared at 80 ℃ via both static mass loss and polarization curve methods.The synergies between each of these two corrosion inhibitors and each of the inorganic anions or anionic surfactants were also investigated.The results show that the inhibition effect of quaternary ammonium salt of thioureido alkyl imidazoline reaches a 98.3% rate of corrosion inhibition and is significantly superior to that of quaternary ammonium salt of alkyl imidazoline.The best corrosion inhibition effect is achieved when the mass ratio of quaternary ammonium salt of thioureido alkyl imidazoline to I-is 1：1 during preparation process.This gives a corrosion inhibition effect 1.5% higher than that of quaternary ammonium salt of thioureido alkyl imidazoline compounds used alone.

关 键 词：硫脲基咪唑啉季铵盐 合成 缓蚀作用 I-协同作用 

分 类 号：O600.1[理学—化学]