锅炉水中咪唑啉缓蚀剂对碳钢的缓蚀行为  

Preparation and Performance Evaluation of Imidazoline Corrosion Inhibitor

作　　者：李倩[1] 吕振波[1] 赵杉林[1] 

机构地区：[1]辽宁石油化工大学,辽宁抚顺113001

出　　处：《腐蚀与防护》2009年第5期303-305,311,共4页Corrosion & Protection

基　　金：国家自然科学基金资助项目(20371024)

摘　　要：以油酸和二乙烯三胺为反应物、二甲苯为带水剂,制备烷基咪唑啉类缓蚀剂,对该缓蚀剂的合成条件、分子结构与在锅炉水系统的缓蚀性能的关系进行了研究。结果表明,最佳合成条件为酸胺比为1∶1.4,带水剂体积占反应物总体积的20%,在145℃左右回流,逐步升温至210℃,回流8 h,产物的收率为96.5%,烷基咪唑啉衍生物的用量为20 mg/L时在锅炉水中缓蚀率可达90%以上;该缓蚀剂抑制腐蚀的原因是在碳钢表面缓蚀剂吸附成膜,有效阻挡了钢表面与水的接触。An imidazoline corrosion inhibitor was synthesized from diethylenetriamine and oleic acid using dimelthylbenzene as a water carrying agent. The optimized parameters for the preparation were obtained, when the molar ratio of oleic acid to diethylenetriamine was 1 ： 1.4, volume ratio of dimethylbenzene to react agents was 1 ： 5, reaction temperature was 145-210 ℃, reflux time was 8 h, the yield was up to 96. 5%. The corrosion inhibition efficiency on carbon steel was over 90% with imidazoline derivative concentration of 20 mg/L in boiler solutions.

关 键 词：咪唑啉 缓蚀剂 合成条件 锅炉水 

分 类 号：TG174.42[金属学及工艺—金属表面处理]