Synthesis of new oleic imidazoline corrosion inhibitors and evaluation of their performance

WU Gang; HAO Ningmei; CHEN Yinjuan; MI Siqi; JIA Xiaolin; HU Songqing

doi:10.3969/j.issn.0438-1157.2013.04.050

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Synthesis of new oleic imidazoline corrosion inhibitors and evaluation of their performance

更新时间：2025-12-10

- Synthesis of new oleic imidazoline corrosion inhibitors and evaluation of their performance
- CIESC Journal Issue 4, Pages: 1485-1492(2013)
- 作者机构：
  
  1. 中国石油天然气集团公司华北油田分公司采油工艺研究院,河北任丘,062500
  2. 中国石油大学信息与控制工程学院,山东,青岛,266580
  3. 中国石油大学理学院,山东,青岛,266580
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.04.050
  CLC： G174O641
- Online First：05 April 2013，
  
  Published：05 April 2013
- 稿件说明：
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WU Gang, HAO Ningmei, CHEN Yinjuan, et al. Synthesis of new oleic imidazoline corrosion inhibitors and evaluation of their performance[J]. CIESC Journal, 2013, (4): 1485-1492.
DOI：

WU Gang, HAO Ningmei, CHEN Yinjuan, et al. Synthesis of new oleic imidazoline corrosion inhibitors and evaluation of their performance[J]. CIESC Journal, 2013, (4): 1485-1492. DOI： 10.3969/j.issn.0438-1157.2013.04.050.

摘要

采用溶剂法合成了两种新型咪唑啉缓蚀剂1-(2-氨乙基)-2-油酸基咪唑啉(A)和1-(2-氨基-硫脲乙基)-2-油酸基咪唑啉(B)

通过静态失重法和电化学极化曲线对其缓蚀性能进行了评价

并通过量子化学和分子动力学模拟方法对其缓蚀机理进行了研究。结果表明

两种缓蚀剂均具有较好的抗盐酸腐蚀性能

能同时抑制Q235钢的阴、阳极反应过程。在0～250 mg·L-1浓度范围内

B的缓蚀性能优于A

且二者的最佳实验浓度均为150 mg·L-1。此外

A、B的活性区域主要分布在咪唑环和亲水支链上

其分子头基能够有效驱替H2O分子从而使缓蚀剂起到缓蚀作用

缓蚀性能的理论评价结果与实验规律相一致。

Abstract

Two new imidazoline corrosion inhibitors

1-(2-ammonia ethyl)-2-oleic acid imidazole(A)and 1-(2-amino-thiourea ethyl)-2-oleic acid imidazole(B)

were synthesized.The inhibition performance was evaluated by means of the static mass loss method and polarization curves.The mechanism of corrosion inhibition was studied by quantum chemistry calculation and molecular dynamics simulation.The results showed that both compounds A and B had good corrosion resistance in HCl solution

and they could promote both anodic and cathodic polarization of Q235 steel simultaneously.The inhibition performance of B was better than that of A.The best experimental application concentration was 150 mg稬-1 in the range of 0 to 250 mg稬-1.Moreover

the active regions were mainly distributed on the imidazole ring and the hydrophilic chain.The head groups could efficiently displace H2O molecule

and corrosion was consequently restrained.Corrosion inhibition performance evaluated by the theoretic method agreed with the experimental results.

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