Synthesis of new ionic liquids and corrosion inhibition performance of its cationic imidazoline group

SHI Shuncun; YI Pinggui; CAO Chenzhong; WANG Xueye; SU Jieshu; LIU Junxi

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Synthesis of new ionic liquids and corrosion inhibition performance of its cationic imidazoline group

更新时间：2025-12-10

- Synthesis of new ionic liquids and corrosion inhibition performance of its cationic imidazoline group
- CIESC Journal Issue 6, Pages: 1112-1119(2005)
- 作者机构：
  
  1. 湖南科技大学化学化工学院,湖南,湘潭,411201
  2. 湘潭大学化学学院,湖南,湘潭,411105
- 作者简介：
- 基金信息：
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- Online First：25 June 2005，
  
  Published：25 June 2005
- 稿件说明：
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SHI Shuncun, YI Pinggui, CAO Chenzhong, et al. Synthesis of new ionic liquids and corrosion inhibition performance of its cationic imidazoline group[J]. CIESC Journal, 2005, (6): 1112-1119.
DOI：

SHI Shuncun, YI Pinggui, CAO Chenzhong, et al. Synthesis of new ionic liquids and corrosion inhibition performance of its cationic imidazoline group[J]. CIESC Journal, 2005, (6): 1112-1119. DOI：

摘要

以高纯环烷酸为原料，合成了一系列含咪唑啉环的新型离子液体Ⅰ～Ⅴ，探讨了阳离子咪唑啉基团中N（3）原子上取代基与缓蚀性能的关系.采用碳钢挂片失重法和电化学测试法，评价了它们在酸性溶液中的缓蚀性能;采用量子化学法和极化效应指数法，分别计算了离子液体Ⅰ～Ⅴ阳离子咪唑啉基团的前线轨道能量及其相应的PEI等参数.实验结果和理论分析表明：离子液体Ⅰ～Ⅴ阳离子咪唑啉基团的缓蚀效率呈现如下关系，Ⅴ＞Ⅳ＞Ⅲ＞Ⅱ＞Ⅰ;其缓蚀效率与EHOMO、ΔEL-H和PEI等参数间均具有良好的线性关系.

Abstract

A series of new ionic liquids Ⅰ—Ⅴ with imidazoline ring were synthesized from highly pure naphthenic acids.The relationship between the alkyl connecting with N（3） of imidazoline ring and corrosion inhibition performance was investigated.The corrosion inhibition performance was measured by using the mass loss method and electrochemistry method for carbon steel samples in acidic solution.The quantum chemistry method and polarizablity effect index method were used to calculate the parameters such as front molecular orbit energy and corresponding PEI of cationic imidazoline group of ionic liquids Ⅰ—Ⅴ.Measured results and theoretical analyses indicated that corrosion inhibition efficiency of the cationic imidazoline group of ionic liquids Ⅰ—Ⅴ was decreasing as in following order:Ⅴ>Ⅳ>Ⅲ>Ⅱ>Ⅰ，and the corrosion inhibition efficiency had a good linear relationship with the such parameters as EHOMO

ΔEL-H and PEI.

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