铁在盐酸中腐蚀电位下的EIS及添加缓蚀剂的影响  

THE EFFECTS OF INHIBITORS ON EIS OF IRON AT CORROSION POTENTIAL IN HYDROCHLORIC ACID SOLUTION

作　　者：张鸣镝[1] 曹楚南[1] 林海潮[1] 

机构地区：[1]中国科学院腐蚀科学开放实验室

出　　处：《中国腐蚀与防护学报》1993年第2期101-109,共9页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金委支持课题

摘　　要：研究了工业纯铁在不加和添加不同缓蚀剂的盐酸溶液中腐蚀电位下的电化学阻抗谱(EIS)。研究结果证实了早先关于缓蚀剂的电化学研究方法的讨论中对腐蚀电位下的EIS分析所提出的观点以及新近提出的关于混合电位下的法拉第阻抗的理论。The Electrochemical Impedance Spectrum(EIS)of Armco iron at corrosion potential in 1 mol/L HCl solution with and without addition of various inhibitors were investigated. The results show that the EIS in the blank solution involves one high-frequence capacitive arc,one low-frequence capacitive arc and one inductive arc. The feature of EIS in the solution added with hexylamine (HA)is similar to that in the blank solution,while dodecylamine(DDA)is added into the blank solution,the EIS degenerates to a single capacitive arc with much larger Polarization resistance. When thiourea (TU)is added as inhibitor, the EIS involves a high frequence capacitive arc and a low frequence inductive arc. These results confirm the previously proposed theory of Faradaic admittance at mixed potential.

关 键 词：铁 盐酸 腐蚀电位 EIS 缓蚀剂 

分 类 号：TG172.63[金属学及工艺—金属表面处理]