Inhibition of CO2 corrosion of N80 carbon steel by carboxylic quaternary imidazoline and halide ions additives

被引：0
|
作者：
P. C. Okafor
C. B. Liu
X. Liu
Y. G. Zheng
机构：
[1] Chinese Academy of Sciences,State Key Laboratory for Corrosion and Protection, Institute of Metal Research
[2] University of Calabar,Department of Pure and Applied Chemistry
[3] Shenyang Institute of Chemical Technology,Department of Applied Chemistry
来源：
Journal of Applied Electrochemistry | 2009年 / 39卷
关键词：
CO; corrosion; Mild steel; Imidazoline; Halide ions; Synergism;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The inhibition of the corrosion of N80 mild steel by 2-undecyl-1-1-ethylamino-1-ethylcarboxyl quaternary imidazoline (CQI) in CO2-saturated 3% NaCl and 3% Na2SO4 solutions was studied using electrochemical methods. Inhibition efficiency increased with increase in CQI concentration and synergistically increased in the presence of halide ions. CQI inhibited the corrosion reaction by chemical adsorption on the metal/solution interface in halide free solutions and by a combination of chemical and coulombic attraction in the presence of halide ions. The adsorption characteristics of the inhibitor were approximated by Frumkin isotherm and El-Awady et al. kinetic–thermodynamic model.
引用
收藏
页码：2535 / 2543
页数：8
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