Acetyl thiourea chitosan as an eco-friendly inhibitor for mild steel in sulphuric acid medium

被引：213

作者：

Fekry, A. M. ^{[1
]}

Mohamed, Riham R. ^{[1
]}

机构：

[1] Cairo Univ, Fac Sci, Dept Chem, Giza, Egypt

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 06期

关键词：

EIS; Polarization; SEM; Steel; Acetyl thiourea chitosan polymer; CORROSION INHIBITION; NACL SOLUTIONS; CARBON-STEEL; COATINGS; DERIVATIVES; ADSORPTION; HCL; PROTECTION; CHLORIDE; CHITIN;

D O I：

10.1016/j.electacta.2009.11.011

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Acetyl thiourea chitosan polymer (ATUCS) has been synthesized and evaluated as corrosion inhibitor. The electrochemical behavior of mild steel in naturally aerated 0 5 M H(2)SO(4) acid containing different concentrations of ATUCS has been studied by potentiodynamic polarization. electrochemical impedance spectroscopy (EIS) measurements and surface examination via scanning electron microscope (SEM) technique. The results of EIS showed that the resistance (R(t)) increases slightly with increasing immersion time indicating a slight decrease in corrosion rate of the steel with time. Also. the corrosion rate increases with either increasing temperature or decreasing the polymer concentration as observed by polarization technique Electrochemical impedance spectroscopy measurements under open-circuit conditions confirmed well polarization results ATUCS has shown very good inhibition efficiency (IE) in 0.5 M sulphuric acid solution reaches to 94.5% for 0 76 mM concentration IE of this compound has been found to vary with the concentration of the polymer solution, immersion time and temperature. Published by Elsevier Ltd

引用

页码：1933 / 1939

页数：7

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