咪唑啉类衍生物缓蚀性能研究

中国腐蚀与防护学报

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咪唑啉类衍生物缓蚀性能研究

刘建国,高歌,徐亚洲,季菀然,李自力

中国石油大学（华东）

Study on corrosion inhibition performance of imidazoline derivatives

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摘要: 在油气开采及输送过程中，输送介质的腐蚀性会给管道和设备带来严重的腐蚀问题，咪唑啉类衍生物在管道内防腐得到了广泛的应用。本文采用失重法、电化学极化法、电化学阻抗谱以及表面分析来评价缓蚀剂浓度、温度及不同取代基对咪唑啉缓蚀性能的影响。结果表明，该缓蚀剂对阴、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联系的。温度较低时，缓蚀剂只有达到一定浓度才能有较高的缓蚀率；温度较高时，较低浓度的缓蚀剂就能达到良好的缓蚀率，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：In the process of oil and gas extraction and transportation, the corrosion of the transmission medium will cause serious corrosion problems to the pipeline and equipment, which poses a great threat to the safety of production. Imidazole derivatives have been widely used in the field of pipeline internal corrosion protection. In this experiment, weight loss method, electrochemical methods, and surface analysis method were used to evaluate the influence of inhibitor concentration, test temperature and different substituents on the corrosion inhibition performance of sixteen alkyl imidazoline. The results show that the imidazoline has a good inhibitory 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. When the temperature is low, only a high concentration of corrosion inhibitor can reach a higher corrosion inhibition rate; when the temperature is higher, the low concentration of corrosion inhibitor can reach a good corrosion inhibition rate, and the corrosion inhibition rate changes little when the concentration increases. The substituent structure affects the inhibition of corrosion inhibitors on the corrosive medium.

Key words： imidazoline inhibitor weight-loss method electrochemical method

收稿日期: 2017-11-07

ZTFLH:

TG174.42

基金资助:国家自然科学基金;青岛市自主创新计划;中央高校基本科研业务费专项资金;山东省自然科学基金

通讯作者: 刘建国

Corresponding author: Liu JianGuo

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引用本文:

刘建国高歌徐亚洲季菀然李自力. 咪唑啉类衍生物缓蚀性能研究[J]. 中国腐蚀与防护学报, .

链接本文:

https://www.jcscp.org/CN/Y0/V/I/0

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