Green approach to corrosion inhibition of mild steel in two acidic solutions by the extract of Punica granatum peel and main constituents

被引：158
作者：
Behpour, M. [1 ]
Ghoreishi, S. M. [1 ]
Khayatkashani, M. [1 ]
Soltani, N. [2 ]
机构：
[1] Univ Kashan, Dept Analyt Chem, Fac Chem, Kashan 8731751167, IR, Iran
[2] Payame Noor Univ PNU, Dept Chem, Tehran 193954697, Iran
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2012年 / 131卷 / 03期
关键词：
Mild steel; Inhibition; EIS; Corrosion; ELECTROSORPTION VALENCY; PHENOLIC-COMPOUNDS; MEDIA; IRON; IDENTIFICATION; ELLAGITANNINS; DERIVATIVES; ADSORPTION; ESTRONE; COPPER;
D O I：
10.1016/j.matchemphys.2011.10.027
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of the extract of Punica granatum (PG) and their main constituents involve ellagic acid (EA) and tannic acid (TA), as mild steel corrosion inhibitor in 2 M HCl and 1 M H2SO4 solutions was investigated by weight loss measurements. The results obtained from the weight loss measurements show that the inhibition efficiency of TA even in high concentration is very low. Thus, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) investigations were used for different concentrations of PG and EA and best concentration of TA. Potentiodynamic polarization curves indicated that PG and EA behave as mixed-type inhibitors. EIS measurements show an increase of the transfer resistance with increasing inhibitor concentration. The temperature effect on the corrosion behavior of steel without and with the PG extract was studied. The inhibition action of the extract was discussed in view of Langmuir adsorption isotherm. (C) 2011 Elsevier B.V. All rights reserved.
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收藏
页码：621 / 633
页数：13
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