Using EIS to analyse samples of Al-Mg alloy AA5083 treated by thermal activation in cerium salt baths

被引：51

作者：

Bethencourt, M. ^{[1
]}

Botana, F. J. ^{[1
]}

Cano, M. J. ^{[1
]}

Marcos, M. ^{[1
]}

Sanchez-Amaya, J. M. ^{[1
]}

Gonzalez-Rovira, L. ^{[1
]}

机构：

[1] Univ Cadiz, Fac Ciencias Mar & Ambientales, Dept Ciencia Mat & Ingn Met & Quim Inorgan, Puerto Real 11510, Spain

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 05期

关键词：

aluminium; rare earth elements; EIS; SEM; alkaline corrosion;

D O I：

10.1016/j.corsci.2007.12.009

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

This paper describes a study undertaken of the morphological and anticorrosive characteristics of surface layers formed on the Al-Mg alloy AA5083 from solutions of Ce(III), by means of various heat treatments while immersed in baths of cerium salts. SEM/EDS studies have demonstrated the existence of a heterogeneous layer formed by a film of aluminium oxide/hydroxide on the matrix and a series of dispersed islands of cerium deposited on the cathodic intermetallics. With the object of evaluating the degree of protection provided by the layers formed and of characterising the particular contribution of the electrochemical response of the system in NaCl, the results obtained by means of EIS are presented and discussed. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1376 / 1384

页数：9

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