Aqueous extract of Acacia cyanophylla leaves as environmentally friendly inhibitor for mild steel corrosion in 1 M H2SO4 solution

被引：15
作者：
Avci, Gulsen [1 ]
Keles, Yuksel [2 ]
机构：
[1] Mersin Univ, Fac Educ, Dept Chem Educ, Mersin, Turkey
[2] Mersin Univ, Fac Educ, Dept Biol Educ, Mersin, Turkey
来源：
SURFACE AND INTERFACE ANALYSIS | 2011年 / 43卷 / 10期
关键词：
corrosion; inhibition; electrochemical techniques; Acacia cyanophylla; ADSORPTION; DERIVATIVES; BEHAVIOR;
D O I：
10.1002/sia.3714
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The efficiency of Acacia cyanophylla leaves extract as an environmentally friendly inhibitor for mild steel in aerated aqueous 1 M H2SO4 solution has been investigated by potentiodynamic polarization measurements and electrochemical impedance spectroscopy techniques. Addition of inhibitor decreases the corrosion current whereas the corrosion potential values show slight shifts in positive directions. Inhibition efficiency was found to be about 93% (the maximum value was determined from the polarization curve). Efficiencies obtained from both electrochemical techniques are in good agreement. Adsorption of Acacia cyanophylla leaves extract on mild steel surface in 1 M H2SO4 solution obeys Langmuir adsorption isotherm. Polarization curves were also obtained at different temperatures in order to measure changes of corrosion rate. Corrosion current increases and inhibition efficiency decreases with temperature increasing in H2SO4 solutionswith and without Acacia cyanophylla extract. Corrosion parameters also changed with exposure time. Copyright (C) 2010 John Wiley & Sons, Ltd.
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收藏
页码：1311 / 1317
页数：7
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