含氟咪唑啉季铵盐缓蚀剂的合成及缓蚀性能  

Synthesis of Fluorine-Containing Imidazoline Quaternary Ammonium Salt Inhibitor and Evaluation of Its Inhibitory Performance

作　　者：张可桂 杨文忠[1] 徐斌[1] 刘瑛[1] 尹晓爽[1] 

机构地区：[1]南京工业大学理学院,江苏南京210009

出　　处：《材料保护》2014年第8期31-35,58,共6页Materials Protection

基　　金：国家重大科技专项课题(2013ZX07210001)资助

摘　　要：以全氟乙酸、二乙烯三胺和溴代十二烷为原料,采用逐级脱水法合成了新型的含氟咪唑啉季铵盐(IMF),并以红外光谱(FTIR)确定其结构,采用失重法、动电位极化曲线、电化学阻抗等方法研究其在0.5 mol/L HCl溶液中对Q235碳钢的缓蚀率与浓度、温度的关系,以扫描电镜(SEM)表征Q235碳钢的腐蚀形貌,运用热力学参数探究缓蚀机理。结果表明:IMF的缓蚀率随其浓度增大而增大,在2.0 mmol/L时达到最高,且在高温时有优良的缓蚀性能;IMF与金属表面有作用力存在,阻碍了其在高温时的脱附。A Kind at imidazoune quaternary ammonium sur containing fluorine(IMF) was synthesized via step-by-step dchydration of raw materials(fluorinated acetic acid,diethylenetriamine,and bromododceane).The chemical structure of as- synthesized IMF was analyzed by infrared spectrometry,and its inhibition performance for Q235 steel in 0.5 mol/L HC1 in relation to temperature and concentration was evaluated by weight loss method in association with measurements of potentiodynamic polarization curve and electrochemical impedance spectrum.The morphology of the corroded carbon steel surface was observed with a scanning electron microscope,and the inhibitory mechanism of the inhibitor was discussed by taking into account thermodynamic parameters.Results showed that the inhibition efficiency of IMF increased with the increase of concentration and reached the maximum at the concentration of 2.0 mmol/L.,while the inhibitor showed good inhibitory performance under elevated temperatures.In terms of the inhibitory mechanisms,IMF was adsorbed on steel surface through strong interactions,and its adsorption film on steel surface was well retained even at elevated temperatures thereby functioning to inhibit corrosion of the carbon steel.

关 键 词：含氟咪唑啉季铵盐 缓蚀剂 缓蚀性能 Q235钢 

分 类 号：TG174.42[金属学及工艺—金属表面处理]