高效双咪唑啉季铵盐对Q235的缓蚀性能及机理分析  

Corrosion inhibition performance and mechanism analysis of high-efficiency imidazoline quaternary ammonium salt on Q235

作　　者：王鹏杰 宋昱灏 樊林 邓宽海[1] 李忠慧[3] 梅宗斌 郭雷 林元华[1,2,3] WANG Pengjie;SONG Yuhao;FAN Lin;DENG Kuanhai;LI Zhonghui;MEI Zongbin;GUO Lei;LIN Yuanhua(State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering(Southwest Petroleum University),Chengdu 610500,China;School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China;School of Petroleum Engineering,Changjiang University,Wuhan 434023,China;Sichuan Huayu Drilling and Production Equipment Co.,Ltd.,Luzhou 646000,China;College of Materials and Chemical Engineering,Tongren University,Tongren 554300,China)

机构地区：[1]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500 [2]西南石油大学新能源与材料学院,四川成都610500 [3]长江大学石油工程学院,湖北武汉434023 [4]四川华宇钻采装备有限公司,四川泸州646000 [5]铜仁学院材料与化学工程学院,贵州铜仁554300

出　　处：《工业水处理》2024年第12期166-174,共9页Industrial Water Treatment

摘　　要：为进一步提高酸洗环境中的缓蚀效率并降低使用成本,以油酸、三乙烯四胺和溴代正丁烷为原料,制备出一种高效的双咪唑啉季铵盐化合物SMZB。通过失重实验、电化学实验、表面形貌和理论计算等方法,研究了SMZB在1.0 mol/L HCl溶液中对Q235的缓蚀性能及其缓蚀机理。结果表明,SMZB浓度为2.0 mmol/L时,通过失重实验、电化学阻抗谱(EIS)、动电位极化曲线(Tafel)测试得到的缓蚀效率分别为98.88%、98.15%、99.62%;电化学实验可进一步证明SMZB能够吸附在Q235表面形成稳定的保护膜,并进一步降低腐蚀体系内的电荷转移速率;SMZB是一种抑制阴极为主的混合型缓蚀剂,且遵循Langmuir等温吸附方程;理论计算表明SMZB的吸附位点主要位于咪唑环和Br^(-),且能够自发地吸附在Q235表面。SMZB能够在1.0 mol/L HCl溶液中发挥优异的缓蚀性能,主要是在Q235表面形成稳定保护膜并降低体系内的电荷转移速率,从而具有优异的缓蚀性能。To further improve the corrosion inhibition efficiency in acid washing environments and reduce costs,an efficient bis-imidazoline quaternary ammonium salt(SMZB)compound was synthesized by using oleic acid,triethylenetetramine,and bromo-n-butane as raw materials.The corrosion inhibition performance and mechanism of SMZB on Q235 in 1.0 mol/L HCl solution were studied through methods such as weight loss experiments,electrochemical experiments,surface morphology,and theoretical calculations.The results showed that when the concentration of SMZB was 2.0 mmol/L,the inhibition efficiencies by weight loss experiment,EIS,and Tafel corrosion were 98.88%,98.15%,and 99.62%,respectively.Electrochemical experiments further proved that SMZB could adsorb on the surface of Q235 to form a stable protective film and further reduced the charge transfer rate within the corrosion system.SMZB was a mixed corrosion inhibitor that mainly suppresses the cathode and follows the Langmuir isotherm adsorption equation.Theoretical calculations indicated that the adsorption sites of SMZB were mainly located in the imidazole ring and Br^(−),and could spontaneously adsorb on the surface of Q235.SMZB exhibited excellent corrosion inhibition performance in a 1.0 mol/L HCl solution,which was mainly due to the formation of a stable protective film on the surface of Q235 and the reduction of the charge transfer rate within the system,thus providing excellent corrosion inhibition performance.

关 键 词：咪唑啉季铵盐 腐蚀 电化学 

分 类 号：TG174.42[金属学及工艺—金属表面处理]