Physicochemical Study on the Effectiveness of Eco-Friendly Anti-Corrosion Agent on the Corrosion of Steel in H3PO4 Solution

被引：5

作者：

Abdel-Rahman, Hanaa Hammam ^{[1
]}

Hafez, Afaf Mahmoud ^{[2
]}

Helmy, Amr Ahmed ^{[2
]}

机构：

[1] Univ Alexandria, Fac Sci, Dept Chem, Alexandria, Egypt

[2] Univ Alexandria, Inst Grad Studies & Res, Dept Environm Studies, Alexandria, Egypt

来源：

ELECTROCHEMISTRY | 2015年 / 83卷 / 06期

关键词：

Steel; Corrosion Inhibitor; Adsorption; Potentiodynamic Polarization; 0.5 M H2SO4; MILD-STEEL; SULFURIC-ACID; INHIBITIVE PROPERTIES; HIBISCUS-SABDARIFFA; MASS-TRANSFER; ADSORPTION; BEHAVIOR; EXTRACT; SURFACTANTS;

D O I：

10.5796/electrochemistry.83.440

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The inhibitory effect of extract of Hibiscus Sabdariffa on corrosion of steel in aqueous 8 M H3PO4 was investigated by potentiodynamic polarization technique. The inhibition efficiency of Hibiscus extract on corrosion of steel in aqueous 8 M H3PO4 solution increases on increasing in concentration of the extract and decreases with a rise in temperature. Potentiodynamic polarization measurement indicates that Hibiscus acts as a corrosion inhibitor. Theoretical fitting of the different isotherms were tested to clarify the nature of adsorption. The increase in activation energy of corrosion process in the presence of the extract indicates that the extract retards the rate of corrosion of steel in 8 M H3PO4 solution. The structure and morphology of the extract were characterized by Fourier transform infrared spectroscopy (FTIR). Scanning electron microscopy (SEM) study confirmed the adsorption of inhibitor molecules on steel surface. (C) The Electrochemical Society of Japan, All rights reserved.

引用

页码：440 / 444

页数：5

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