The role of Ce(III)-enriched zeolites on the corrosion protection of AA2024-T3

被引：38
|
作者：
Dias, S. A. S. [1 ,2 ]
Marques, A. [2 ]
Lamaka, S. V. [2 ]
Simoes, A. [2 ]
Diamantino, T. C. [1 ]
Ferreira, M. G. S. [2 ,3 ]
机构：
[1] LNEG, P-1649038 Lisbon, Portugal
[2] Univ Tecn Lisboa, ICEMS, Inst Super Tecn, P-1049001 Lisbon, Portugal
[3] UA, DECV, CICECO, P-3810193 Aveiro, Portugal
来源：
ELECTROCHIMICA ACTA | 2013年 / 112卷
关键词：
Zeolites; Corrosion; Cerium; Copper; Chloride; LEIS; SOL-GEL COATINGS; SYNTHETIC ZEOLITE; ION-EXCHANGE; INHIBITORS; PIGMENTS; ALLOY;
D O I：
10.1016/j.electacta.2013.09.026
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The present work demonstrates that the addition of Ce-enriched zeolite microparticles to hybrid sol-gel formulation confers protection to the coating. After two weeks of immersion the integrity of sol-gel film remains unchanged. These properties are due to the fact that the Ce(III) loaded zeolite microparticles are released in response to the adsorption of ionic species involved in the corrosion process of AA2024-T3 substrate. Zeolite adsorption of Cu2+ cations from intermetallic dissolution and Cl- anions from the solution is shown to take place, enhancing the protective properties of the coating. The microparticles and coatings characterization were carried out by SEM/EDS and the protection properties of the modified coatings were assessed using EIS and localised electrochemical impedance spectroscopy (LEIS) measurements. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：549 / 556
页数：8
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