月桂酸咪唑啉对铜在盐酸溶液中缓蚀行为研究  

Study on Corrosion Inhibition Behavior of Imidazoline Laurate on Copper in Hydrochloric Acid Solution

作　　者：周欣 李梦冉 付义东 周文彬 孙杰[1] ZHOU Xin;LI Mengran;FU Yidong;ZHOU Wenbin;SUN Jie(Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学环境与化学工程学院,沈阳110159

出　　处：《沈阳理工大学学报》2024年第3期76-83,共8页Journal of Shenyang Ligong University

基　　金：国家自然科学基金项目(52004165);沈阳理工大学引进高层次人才科学研究项目(1010147000903)。

摘　　要：通过电化学方法中动电位极化曲线和电化学阻抗谱研究月桂酸咪唑啉在0.5 mol/L盐酸中对铜的缓蚀行为,采用量子化学计算(Gaussian)、分子动力学模拟(MD)的方法探究月桂酸咪唑啉的缓蚀机理。研究结果表明:0.1 mmol/L月桂酸咪唑啉对0.5 mol/L盐酸中铜的缓蚀效率最高,为96.58%,增大浓度反而会降低缓蚀效率;月桂酸咪唑啉以物理吸附和化学吸附两者结合的方式形成吸附膜,吸附膜相对致密,其中咪唑啉环呈现平行吸附的特点。The corrosion inhibition behavior of imidazoline laurate on copper in 0.5 mol/L hydro-chloric acid was studied by the potentiodynamic polarization curve and electrochemical impedance spectroscopy in electrochemical method.The corrosion inhibition mechanism of imidazoline laurate was explored by quantum chemical calculation(Gaussian)and molecular dynamics simulation(MD).The results showed that 0.1 mmol/L imidazoline laurate had the highest corrosion inhibi-tion efficiency in 0.5 mol/L hydrochloric acid,which was 96.58%,and increasing the concentra-tion would reduce the corrosion inhibition efficiency.Imidazoline laurate forms an adsorption film by combining physical adsorption and chemical adsorption,and the adsorption membrane is relative-ly dense,and the imidazoline has characteristics of parallel adsorption.

关 键 词：咪唑啉 电化学 量子化学计算 分子动力学模拟 

分 类 号：TG178[金属学及工艺—金属表面处理]