Comparison between the inhibition efficiencies of Ce(III) and Ce(IV) ammonium nitrates against corrosion of AA2024 aluminum alloy in solutions of low chloride concentration

被引：87

作者：

Matter, E. A. ^{[1
]}

Kozhukharov, S. ^{[2
]}

Machkova, M. ^{[2
]}

Kozhukharov, V. ^{[2
]}

机构：

[1] Damanhour Univ, Fac Sci, Dept Chem, Damanhour 22111, Egypt

[2] Univ Chem Technol & Met, BU-1756 Sofia, Bulgaria

来源：

CORROSION SCIENCE | 2012年 / 62卷

关键词：

Alloy; Rare earth elements; EIS; SEM; XPS; Neutral inhibition; SOL-GEL COATINGS; CHROMATE CONVERSION COATINGS; PITTING CORROSION; LOCALIZED CORROSION; LANTHANIDE SALTS; CERIUM; PROTECTION; MECHANISM; BEHAVIOR; NACL;

D O I：

10.1016/j.corsci.2012.03.039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion protection of the AA2024 aluminum alloy in 0.01 M NaCl solutions of Ce(III) and Ce(IV) ammonium nitrates was studied. The inhibition efficiency was evaluated applying linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS). Superficial analytical techniques (optical microscopy, SEM, EDS and XPS) were applied for elucidation of the inhibition mechanism. The results showed that both cerium salts could behave either as inhibitors or activators of the corrosion process depending on the experimental conditions. The solutions of Ce(III) salt revealed better inhibitive ability than those of Ce(IV) in a relatively large range of conditions. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：22 / 33

页数：12

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