氟碳咪唑啉季铵盐在油田采出液中对N80钢缓蚀性能研究  

Study on corrosion inhibition of fluorocarbon imidazoline quaternary ammonium salt on N80 steel in oilfield production fluid

作　　者：黄瑾[1,2] 侯雯雯 李延生[3] 白福财 陈君[1,2] 李芬芬 HUANG Jin;HOU Wen-wen;LI Yan-sheng;BAI Fu-cai;CHEN Jun;LI Fen-fen(Shaanxi Research Design Institute of Petroleum and Chemical Industry,Xi’an 710054,China;Shaanxi Key Laboratory of Fine Petroleum Chemicals,Xi’an 710054,China;Xingzichuan Oil Recovery Plant of Yanchang Oil Field Co.,Ltd.,Yan’an 717400,China)

机构地区：[1]陕西省石油化工研究设计院,陕西西安710054 [2]陕西省石油精细化学品重点实验室,陕西西安710054 [3]延长油田股份有限公司杏子川采油厂,陕西延安717400

出　　处：《应用化工》2020年第5期1129-1132,共4页Applied Chemical Industry

基　　金：国家重点新产品(2014GRG00007);陕西省重点新产品(2015xcp-001);陕西省统筹项目(2016KTZDGy-09);陕西省重点项目(2017ZDXM-GY-084);陕西省延长石油(集团)有限责任公司项目(ycsy2018ky-A-30)。

摘　　要：由二乙烯三胺和全氟辛酸合成了全氟庚基-N-氨乙基咪唑啉季铵盐,利用红外光谱仪(FTIR)、质谱确定氟碳咪唑啉季铵盐结构、滴定法测定其含量、失重法和电化学方法评价了在油田采出液中对N80钢腐蚀的缓蚀性能和电化学腐蚀机理。结果表明,其含量为85%,用量≥50 mg/L时,具有优良的缓蚀效果和耐温效果,在30~70℃条件下,腐蚀速率<0.041983 mm/a,缓蚀率均在90%以上。Perfluoroheptyl-N-aminoethyl imidazoline quaternary ammonium salt was synthesized by reaction of diethylenetriamine and perfluorooctanoic acid.The structure of fluorocarbon imidazoline quaternary ammonium salt was determined by infrared spectroscopy(FTIR),mass spectrometry,and the corrosion inhibition and electrochemical corrosion mechanism of N80 steel were evaluated by titration,weight loss and electrochemical method.The result showed that the content was 85%,when the dosage was≥50 mg/L,fluorocarbon imidazolin quaternary ammonium salt has excellent corrosion inhibition and temperature resistance,the corrosion rates measured at 30~70℃were less than 0.041983 mm/a,and the corrosion inhibition rates were all above 90%.

关 键 词：氟碳咪唑啉季铵盐 油田采出液 缓蚀剂 缓蚀率 

分 类 号：TQ421.1[化学工程] TG174.42[金属学及工艺—金属表面处理]