咪唑啉缓蚀剂官能团结构对20#碳钢缓蚀作用影响  

Effect of Functional Group Structure of Imidazoline Inhibitor on the Corrosion Inhibition for 20# Carbon Steel

作　　者：张天盼 Zhang Tianpan(Maoming R&P Petrochemical Engineering Co.,Ltd.,Guangdong Maoming 525000)

机构地区：[1]茂名瑞派石化工程有限公司,广东茂名525000

出　　处：《石化技术》2021年第10期18-21,共4页Petrochemical Industry Technology

摘　　要：以苯甲酸、月桂酸为有机酸、二乙烯三胺为有机胺、二甲苯为携水剂,硼酸为催化剂,合成不同团能团结构的咪唑啉缓蚀剂。通过红外光谱法、静态失重法、极化曲线与交流阻抗电化学等方法对缓蚀剂效果进行分析与评价。结果表明:月桂酸咪唑啉和苯甲酸咪唑啉均属于以抑制阳极为主的混合型缓蚀剂,在模拟HCl-H_(2)O的腐蚀环境中对20#碳钢的缓蚀效果显示,月桂酸咪唑啉缓蚀剂的缓蚀效果更佳,1.5 g/L的月桂酸咪唑啉缓蚀剂的缓蚀效率达到96.95%。In this paper,benzoic acid,lauric acid,diethylenetriamine,xylene,and boric acid are used as raw materials to synthesize imidazoline inhibitor with different functional group structures.The effects of imidazoline inhibitor are analyzed and evaluated by infrared spectroscopy,static gravimetric method,polarization curves,and electrochemical impedance spectroscopy method.The results show that both imidazoline laurate and imidazoline benzoate belong to the corrosion inhibitors that mainly inhibit the electrochemical reaction of the anode.After simulating the corrosion environment of HCl-H_(2)O to evaluate the corrosion resistance of the new type of corrosion inhibitor,the imidazoline laurate corrosion inhibitor shows better corrosion resistance,and the corrosion inhibition efficiency of 1.5 g/L imidazoline laurate corrosion inhibitor can reach 96.95%.

关 键 词：咪唑啉 苯甲酸 月桂酸 20#碳钢 腐蚀 

分 类 号：TE65[石油与天然气工程—油气加工工程] TQ050.9[化学工程]