摘要
测量了铁在自腐蚀电位下,在添加与未添加伯胺缓蚀剂的1mol/L HCI溶液中的阻抗谱。结果表明,随着伯胺碳链增长,阻抗谱将出现高频时间常数;随着添加的十二胺(DDA)浓度由低到高的变化,高频时间常数经历了从没有到出现,继而消失的过程。本文用三电层的观点分析了伯胺在盐酸溶液中的吸附行为,从而较好地解释了高频时间常数出现与消失的原因,并建立了相应的等效电路模型。
The EIS of Fe electrode at E_(corr) has been measured in 1mol / L HCI with and without the addition of aliphatic amines. The results show that with the increase of the number of carbon chains of amines from 6 to 14, a new time constant(TC) will appear in the high frequence part of EIS; and with the increase of the concentration of DDA from 5 x 10^(-5) mol / L to 5 x 10^(-4_ mol / L, the new TC begins to arises and become more and more distinguished. But when concentration is increased to 10^(-3) mol/L and 3x 10^(-3) mol / L, the new TC will disappear. By analysizing the adsorption behavior of amines in HCI with the concept of a triple electric layer(TEL), the cause of the appearance and disappearance of the new TC has been explained and a equivalent circuit model of TEL has been proposed.
出处
《腐蚀科学与防护技术》
CAS
CSCD
1993年第3期169-175,共7页
Corrosion Science and Protection Technology
基金
国家自然科学基金
关键词
缓蚀剂
铁
吸附
阻抗谱
酸
inhibitor
impedance
iron
adsorption
acid
