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

被引：44
|
作者：
Okafor, P. C. [1 ,2 ]
Liu, C. B. [1 ]
Liu, X. [1 ,3 ]
Zheng, Y. G. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Liaoning, Peoples R China
[2] Univ Calabar, Dept Pure & Appl Chem, Calabar, Nigeria
[3] Shenyang Inst Chem Technol, Dept Appl Chem, Shenyang 110142, Peoples R China
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 2009年 / 39卷 / 12期
关键词：
CO2; corrosion; Mild steel; Imidazoline; Halide ions; Synergism; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; 3-PERCENT NACL SOLUTION; MILD-STEEL; DIOXIDE CORROSION; ANODIC-DISSOLUTION; SULFURIC-ACID; HYDROCHLORIC-ACID; H2SO4; SOLUTIONS; REACTION MODEL; IRON;
D O I：
10.1007/s10800-009-9948-5
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
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：9
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