Inhibitory effect of some amino acids on corrosion of Pb-Ca-Sn alloy in sulfuric acid solution

被引：68

作者：

Kiani, M. A. ^{[2
]}

Mousavi, M. F. ^{[2
]}

Ghasemi, S. ^{[2
]}

Shamsipur, M. ^{[1
]}

Kazemi, S. H. ^{[2
]}

机构：

[1] Razi Univ, Dept Chem, Kermanshah, Iran

[2] Tarbiat Modares Univ, Dept Chem, Tehran, Iran

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 04期

关键词：

alloy; SENT; polarization; EIS; acid corrosion;

D O I：

10.1016/j.corsci.2007.11.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present article describes the inhibition effect of amino acids cysteine (Cys), methionine (Met) and alanine (Ala), towards the corrosion of lead-alloy (Pb-Ca-Sn) in H2SO4 solution by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), weight loss measurement and scanning electron microscopy (SEM) methods. The influence of inhibitor concentration, temperature and time on inhibitory behavior of the amino acids was investigated. The corrosion data including corrosion current density (I-corr), corrosion potential (E-corr) and charge transfer resistance (R-ct) were determined from Tafel plots and EIS. Recording impedance spectra showed that the charge transfer resistance is increased by increasing adsorption time. The SEM micrographs revealed that the corroded surface area is decreased in the presence of amino acids. Meanwhile, the inhibition efficiency (IE) was found to be depending on the type of amino acid and its concentration. The IE for 0.1 M Cys in 0.5 M H2SO4 is greater than 96%. Adsorption isotherms were fitted by Langmuir isotherm. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1035 / 1045

页数：11

共 40 条

[1]

ABDELMAKSOUD SA, 2004, ELECTROCHIM ACTA, V49, P4205

[2] THE EFFECT OF AMINO-ACIDS ON THE CORROSION OF NICKEL IN H2SO4 [J].