The effect of temperature and concentration on the corrosion inhibition mechanism of an amphiphilic amido-amine in CO2 saturated solution

被引：103
作者：
Desimone, M. P. [1 ]
Gordillo, G. [2 ]
Simison, S. N. [1 ]
机构：
[1] UNMdP, INTEMA, Div Corros, CONICET, Mar Del Plata, Buenos Aires, Argentina
[2] Univ Buenos Aires, Fac Ciencias Exactas & Nat, DQIAQF, INQUIMAE CONICET, Buenos Aires, DF, Argentina
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 12期
关键词：
Mild steel; EIS; Polarization; MILD-STEEL CORROSION; CARBON-DIOXIDE CORROSION; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; ADSORPTION PROPERTIES; HYDROCHLORIC-ACID; M H2SO4; DERIVATIVES; SURFACE; PHASE; TIME;
D O I：
10.1016/j.corsci.2011.08.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion inhibition mechanism of the N-[2-[(2-aminoethyl)amino]ethyl]-9-octadecenamide on mild steel surface in CO2-saturated 5% NaCl solution has been studied. The inhibition efficiency decreases with increasing temperature. Adsorption of the inhibitor studied is found to follow the Frumkin adsorption isotherm. EIS results show that the mechanism of its corrosion inhibition at concentrations higher than critical micelle concentration is by forming a protective porous bi-layer. The activation energy, thermodynamic parameters and electrochemical results reveal a change in the adsorption mode of the inhibitor studied: the inhibitor could primarily be physically adsorbed at low concentrations, while chemisorption is favoured as concentration increases. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4033 / 4043
页数：11
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