多环咪唑啉缓蚀剂的合成及其缓蚀作用
Synthesis and Inhibition of Imidazoline Derivatives as Corrosion Inhibitor
摘 要
以月桂酸、四乙烯五胺、癸二酸等为原料合成双环和四环咪唑啉衍生物缓蚀剂。通过失重法和电化学法评价缓蚀剂在模拟地层水（饱和CO2）环境中对L360钢的缓蚀作用。采用扫描电镜和能谱仪，观察并分析了缓蚀剂在钢表面的腐蚀形貌。结果表明：四环月桂酸咪唑啉缓蚀剂（LAI）比双环月桂酸咪唑啉缓蚀剂（SAI）的缓蚀效果好，加入量为400 mg/L时达到最高缓蚀率。SAI和LAI都属于混合型缓蚀剂，缓蚀剂遵循Langmuir等温吸附，属于化学吸附。结合SEM和EDS分析可知，SAI和LAI可以在钢的表面形成一层吸附膜，以抑制金属的腐蚀。
咪唑啉
电化学方法
等温吸附
corrosion inhibitor
imidazoline
electrochemical measurement
isothermal adsorption
Abstract
Corrosion inhibitors of imidazoline derivatives were synthesized using lauric acid, tetraethylenepentamine, and sebacic acid as raw materials. In simulated formation water environment saturated with CO2, the inhibition performance of corrosion inhibitors on L360 steel was evaluated by weight loss mothed and electrochemical measurement. Scanning electron microscopy and energy spectrometer were used to analyze the corrosion products on the steel surface. The results show that the inhibition effect of four-ring lauric acid imidazoline inhibitor (LAI) was better than that of double-ring lauric acid imidazoline inhibitor (SAI), and the concentration of corrosion inhibitor that reached the highest corrosion inhibition rate was 400 mg/L. Both the two inhibitors followed Langmuir isothermal adsorption, which belonged to chemical adsorption. Combined with SEM and EDS analysis, it could be seen that SAI and LAI could form a layer of adsorption film on the surface of steel to inhibit metal corrosion.
中图分类号 TG174.4 DOI 10.11973/fsyfh-202007007
所属栏目 绿色缓蚀剂
基金项目 国家自然科学基金（51501160）
收稿日期 2020/3/2
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: ZHANG Chenfeng,HU Junying,ZHONG Xiankang. Synthesis and Inhibition of Imidazoline Derivatives as Corrosion Inhibitor[J]. Corrosion & Protection, 2020, 41(7): 43
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【8】王红艳,卢永斌,白方林,等. 一种新型Mannich碱酸化缓蚀剂的合成及性能评价[J]. 腐蚀科学与防护技术,2013,25(2):133-137.
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