Effect of metal ions on corrosion inhibition of pimeloyl-1,5-di-hydroxamic acid for steel in neutral solution

被引：25
作者：
Alagta, Abdulmajed
Felhösi, Ilona
Telegdi, Judit
Bertoti, Imre
Kalman, Erika
机构：
[1] Hungarian Acad Sci, Chem Res Ctr, Dept Surface Modificat & Nanostruct, H-1025 Budapest, Hungary
[2] Hungarian Acad Sci, Chem Res Ctr, Inst Mat & Environm Chem, H-1025 Budapest, Hungary
来源：
CORROSION SCIENCE | 2007年 / 49卷 / 06期
关键词：
dihydroxamic acid; EIS; XPS; SEM; neutral inhibition;
D O I：
10.1016/j.corsci.2006.11.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of metal ions on the adsorption process and corrosion inhibition of pimeloyl-1,5-dihydroxamic acid (C7) on carbon steel surface in neutral solutions has been investigated by surface analytical and electrochemical techniques. Effective corrosion inhibition given by C7 in the presence of Zn2+ and Ni2+ is believed to be associated with the ability of the hydroxamic acid to form stable slightly soluble complexes with these cations. The influence of the metal ions on the inhibition efficiency is primarily related to the stability constants of C7-cation complexes. Magnesium has no effect on the inhibition performance as it has low stability constant with C7. It was found that the inhibition by C7/cation mixtures depends greatly on the molar ratio and immersion time. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2754 / 2766
页数：13
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