摘要
为促进氨基酸类緩蚀剂的研究应用,采用电化学、扫描电镜、能谱分析和动力学方法,研究了香草醛缩L-赖氨酸与香草醛缩L-酪氨酸在2 mol/L HCl溶液中对1060纯铝的缓蚀作用与缓蚀机理。结果表明:在25℃时,香草醛缩L-赖氨酸席夫碱和香草醛缩L-酪氨酸席夫碱可有效抑制纯铝在2 mol/L HCl溶液中的腐蚀,当浓度分别达到2 g/L和4 g/L时,缓蚀效率最好,且均为混合型缓蚀剂。EDS数据表明席夫碱分子中的电负性元素如O、N吸附在1060纯铝的表面。2种席夫碱缓蚀剂通过在1060纯铝表面吸附成膜来增大纯铝的腐蚀活化能值,导致发生腐蚀反应需要克服更高的能垒,有效地减缓了1060纯铝在2 mol/L HCl溶液中的腐蚀速率。
For promoting the application of amino acids inhibitors,the corrosion inhibition effect and mechanism of vanillin L-lysine and vanillin L-tyrosine on 1060 pure aluminum in 2 mol/L HCl solution by electrochemical measurements,scanning electron microscopy,energy spectrum analysis and kinetic methods.Result showed that vanillin L-lysine Schiff base and vanillin L-tyrosine Schiff base could effectively inhibit the corrosion of pure aluminum in 2 mol/L HCl solution at 25℃.When the concentration reached 2 g/L and 4 g/L,respectively,the best corrosion inhibition efficiency was obtained,and all of them acted as a mixed-type inhibitor.EDS data indicated that electron-negative elements such as O and N in Schiff base molecules were adsorbed on the surface of 1060 pure aluminum.These two Schiff based corrosion inhibitors increased the corrosion activation energy of pure aluminum by adsorbing and forming a film on the surface of 1060 pure aluminum,which led to a higher energy barrier in the corrosion reaction and the effectively decrease of the corrosion rate of 1060 pure aluminum in 2 mol/L HCl solution.
作者
李钰莹
于锦
孙硕
LI Yu-ying;YU Jin;SUN Shuo(College of Science,Shenyang University of Technology,Shenyang 110870,China)
出处
《材料保护》
CAS
CSCD
2021年第3期28-33,共6页
Materials Protection
基金
国家材料环境腐蚀平台资助(项目号2005DKA10400-15-Z04)。
