Influence of cerium (III) ions on corrosion and hydrogen evolution of carbon steel in acid solutions

被引：28
作者：
Heakal, F. El-Taib [1 ]
Tantawy, N. S. [2 ]
Shehata, O. S. [3 ]
机构：
[1] Cairo Univ, Dept Chem, Fac Sci, Giza 12613, Egypt
[2] Ain Shams Univ, Girls Coll Arts Sci & Educ, Cairo, Egypt
[3] Natl Res Ctr, Dept Phys Chem, Giza, Egypt
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 24期
关键词：
Carbon steel; EIS; SEM; Acidic corrosion; Hydrogen evolution; THIADIAZOLE DERIVATIVES; ELECTROCHEMICAL-BEHAVIOR; HYDROCHLORIC-ACID; MAGNESIUM ALLOY; C-STEEL; INHIBITORS; RESISTANCE; NI; MECHANISM; IMPEDANCE;
D O I：
10.1016/j.ijhydene.2012.10.037
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：
This paper intended to investigate the influence of rare earth Ce(III) ions on the corrosion behavior of carbon steel in two acid solutions (0.5 M HCl and 0.25 M H2SO4) in order to control the rate of hydrogen evolution in those systems. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests were used for corrosion rate and electrochemical impedance evaluation. SEM was used to examine the sample surfaces immersed in acid solutions containing the optimal threshold Ce(III) concentration (0.1 mM). All results reveal that the corrosion resistance of carbon steel in HCl is superior to that in H2SO4 due to the higher rate of hydrogen production in the latter. A model for the corrosion process mechanism and inhibition by Ce(III) salt for carbon steel in the two tested media is proposed. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：19219 / 19230
页数：12
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