咪唑啉类衍生物缓蚀性能研究

doi:10.11902/1005.4537.2017.181

中国腐蚀与防护学报

2018, Vol. 38

Issue (6): 523-532 DOI: 10.11902/1005.4537.2017.181

本期目录 | 过刊浏览

咪唑啉类衍生物缓蚀性能研究

刘建国(

),高歌,徐亚洲,李自力,季菀然

1. 中国石油大学 (华东) 储运与建筑工程学院山东省油气储运安全省级重点实验室青岛市环海油气储运技术重点实验室青岛 266580

Corrosion Inhibition Performance of Imidazoline Derivatives

Jianguo LIU(

),Ge GAO,Yazhou XU,Zili LI,Wanran JI

1. Qingdao Key Laboratory of Circle Sea Oil & Gas Storage and Transportation Technology, Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety, College of Pipeline and Civil Engineering, China University of Petroleum East China, Qingdao 266580, China

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摘要:

采用失重法、电化学极化法、电化学阻抗谱及表面分析来评价咪唑啉类缓蚀剂浓度、温度对缓蚀剂缓蚀效果影响的关联性，并分析了不同取代基对咪唑啉类缓蚀剂缓蚀性能的影响。结果表明，十六烷基咪唑啉对阴、阳极过程都有较好的抑制作用，尤其对阳极过程更加有效。浓度和温度对缓蚀剂缓蚀性能的影响是相互关联的。温度较低 (25 ℃) 或较高 (60 ℃) 时，缓蚀剂只有达到一定浓度才能获得较高的缓蚀率；当温度处于40~50 ℃时，较低浓度的缓蚀剂就能达到良好的缓蚀效果，且浓度继续增加，缓蚀率变化不大。取代基结构影响了缓蚀剂对腐蚀介质的阻碍程度。

关键词 ：咪唑啉类缓蚀剂, 失重法, 电化学法

Abstract：

The effect of inhibitor concentration and temperature on the effectiveness of inhibitors of imidazoline derivatives was studied by means of weight loss method, electrochemical measurement, and surface analysis, while the effect of different substituted groups on the inhibition performance of imidazoline inhibitors was also analyzed. The results show that the sixteen alkyl imidazoline has good inhibition effect on the anode and cathode processes, especially for the anode process. The influence of concentration and temperature on the inhibition performance of corrosion inhibitors is interrelated. At lower (25 ℃) or higher (60 ℃) temperatures, only high concentration of corrosion inhibitor can exhibit higher corrosion inhibition rate. At temperatures in the range 40~50 ℃, low concentration of corrosion inhibitor can reach a good corrosion inhibition rate, while the corrosion inhibition rate changes little when the concentration increases. The substituted groups, such as phenylpropionate, can degrade the corrosion inhibition performance of imidazoline inhibitors.

Key words： imidazoline inhibitor mass-loss method electrochemical method

收稿日期: 2017-11-04

ZTFLH:

TG174.42

基金资助:中央高校基本科研业务费专项资金(16CX02037A);青岛市自主创新计划(15-9-1-70-jch)

通讯作者: 刘建国 E-mail: liujianguo@upc.edu.cn

Corresponding author: Jianguo LIU E-mail: liujianguo@upc.edu.cn

作者简介: 刘建国，男，1983年生，博士，副教授

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引用本文:

刘建国,高歌,徐亚洲,李自力,季菀然. 咪唑啉类衍生物缓蚀性能研究[J]. 中国腐蚀与防护学报, 2018, 38(6): 523-532.
Jianguo LIU, Ge GAO, Yazhou XU, Zili LI, Wanran JI. Corrosion Inhibition Performance of Imidazoline Derivatives. Journal of Chinese Society for Corrosion and protection, 2018, 38(6): 523-532.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2017.181 或 https://www.jcscp.org/CN/Y2018/V38/I6/523

图1 不同温度下3.5%NaCl溶液中不同浓度十六烷基咪唑啉对20#碳钢的缓蚀效率随缓蚀剂浓度的变化

图2 20#碳钢在不同温度含不同浓度十六烷基咪唑啉的3.5%NaCl溶液中浸泡7 d后的SEM形貌

表1 20#碳钢在25 ℃含有不同浓度十六烷基咪唑啉的3.5%NaCl溶液中的极化曲线拟合参数

表2 20#碳钢在25 ℃含有不同浓度苯丙酸咪唑啉的3.5%NaCl溶液中的极化曲线拟合参数

图3 20#碳钢在25 ℃含有不同浓度十六烷基咪唑啉的3.5%NaCl溶液中的极化曲线

图4 20#碳钢在25 ℃含有不同浓度苯丙酸咪唑啉的3.5%NaCl溶液中的极化曲线

图5 25 ℃下20#钢在含不同缓蚀剂的3.5%NaCl溶液中的Nyquist图

图6 电化学阻抗谱拟合所用等效电路图

表3 25 ℃下20#钢在添加不同缓蚀剂的3.5%NaCl溶液中的电化学阻抗谱拟合结果

图7 3.5%NaCl溶液中不同浓度十六烷基咪唑啉对20#碳钢缓蚀率随温度的变化

图8 20#碳钢在不同温度下含有不同浓度十六烷基咪唑啉的3.5%NaCl溶液中的极化曲线

表4 20#碳钢在不同温度下含有不同浓度十六烷基咪唑啉的3.5%NaCl溶液中的极化曲线拟合参数

图9 20#碳钢在不同温度下含有不同浓度十六烷基咪唑啉的3.5%NaCl溶液中的阻抗谱

图10 20#碳钢在不同温度含140 mg/L十六烷基咪唑啉的3.5%NaCl溶液中浸泡7 d后腐蚀形貌的SEM像

图11 20#碳钢在不同温度含300 mg/L十六烷基咪唑啉的3.5%NaCl溶液中浸泡7 d后腐蚀形貌的SEM像

图12 20#碳钢在不同温度含600 mg/L十六烷基咪唑啉的3.5%NaCl溶液中浸泡7 d后腐蚀形貌的SEM像

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