薄层液膜下空间电场对碳酸环己胺缓蚀性能的影响  

Effect of External Electric Field on Inhibition Behavior of Cyclohexylamine Carbonate for Carbon Steel N80 Beneath Adsorbed Thin Electrolyte Layers

作　　者：朱紫晶 魏莉莎[1] 陈振宇 邱于兵[2] 郭兴蓬[1,2] ZHU Zijing WEI Lisha CHEN Zhenyu QIU Yubing GUO Xingpeng(Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China Key Laboratory for Material Chemistry of Energy Conversion and Storage, Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]华中科技大学化学与化工学院材料化学与服役失效湖北省重点实验室,武汉430074 [2]华中科技大学化学与化工学院能量转换与存储材料化学教育部重点实验室,武汉430074

出　　处：《中国腐蚀与防护学报》2017年第3期216-220,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(51571098)~~

摘　　要：研究了薄层液膜下空间电场对碳酸环己胺(CHC)缓蚀性能的影响。结果表明,CHC主要抑制碳钢腐蚀反应的阳极过程,对碳钢腐蚀具有显著的缓蚀效果,但施加垂直方向的电场后CHC缓蚀效果显著下降。扫描电镜和X射线光电子能谱分析表明,电场作用导致碳钢表面的腐蚀形貌出现明显变化,CHC在碳钢表面的吸附量显著减少。CHC分子的偶极距(μ)、最高占据轨道能(E_(HOMO))、最低空余轨道能(E_(LUMO))以及能隙(?E=E_(LUMO)-E_(HOMO))在不同的电场条件下的变化规律表明,电场会削弱CHC的反应活性和吸附能力,从而降低其缓蚀效率。Effect of external electric field on the inhibition efficiency of cyclohexylamine carbonate（CHC） for carbon steel N80 beneath adsorbed thin electrolyte layers（ATEL） was investigated by means of electrochemical measurement,scanning electron microscopy（SEM） and X-ray photoelectron spectroscopy（XPS）.The results illustrated that CHC mainly suppresses the anodic corrosion reaction and has strong inhibition effect on the carbon steel corrosion.When an electric field vertical to the steel was applied,the inhibition efficiency of CHC decreased greatly and the adsorption of CHC on the carbon steel surface decreased significantly,so that the surface morphology varied quite obviously after corrosion test.The relevant quantum chemical parameters related to the corrosion inhibition efficiency of CHC were calculated by materials studio software.The acquired parameters such as dipole moment（μ）,EHOMO,ELUMO and ？E all implied that the reactivity and adsorption ability of CHC were reduced significantly after applying external electric field,which affects the inhibition efficiency of CHC.

关 键 词：气相缓蚀剂 薄层液膜 外电场 量子化学 

分 类 号：TG174.1[金属学及工艺—金属表面处理]