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
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.
缓蚀剂
合成条件
锅炉水
imidazoline
corrosion inhibitor
synthesis condition
boiler solution
Abstract
An imidazoline corrosion inhibitor was synthesized from diethylenetriamine and oleic acid using dimethylbenzene 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．
中图分类号 TG174.42
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(20371024)
收稿日期 2008/4/30
修改稿日期 2008/7/14
网络出版日期
作者单位点击查看
引用该论文: LI Qian,LU Zhen-bo,ZHAO Shan-lin. Preparation and Performance Evaluation of Imidazoline Corrosion Inhibitor[J]. Corrosion & Protection, 2009, 30(5): 303～305
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参考文献
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【2】Meyer,Richard G.Imidazoline corrosion inhibitors: US,411748[P].2003-04-11［2004-10-14］．
【3】石顺存,蒋华鹏,方茹苕,等.两性咪唑啉的合成及其缓蚀性能的研究[J].湖南大学学报,自然科学版,2007,22(2):94-97.
【4】张贵才,马涛,葛际江,等.咪唑啉缓蚀剂合成过程中成环程度与其性能的关系[J].西安石油大学学报,2005,20(2):55-59．
【5】罗喆媛,俞敦义,屈人伟.改性咪唑啉缓蚀剂在H2S-3%-NaCl-H2O的体系中缓蚀性能的研究[J].腐蚀与防护,2000,21(8):345-346.
【6】朱镭,丁萍,罗运柏.咪唑啉缓蚀剂的研究与应用进展[J].材料保护,2003,36(12):23-27.
【7】Sapre K,Seal S,Jepson P,et al.Investigation into the evolution of corrosion product layer of 1018 C-steel exposed to multiphase environment using FIB and EIS techniques[J].Corrosion Science,2003,45:59-80.
【8】Chen Y,Jepson W P.EIS measurement for corrosion monitoring under multiphase flow conditions[J].Electrochimica Acta,1999,44:4453-4464．
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