Local and global electrochemical impedances applied to the corrosion behaviour of an AZ91 magnesium alloy

被引：164
|
作者：
Galicia, Gonzalo [1 ]
Pebere, Nadine [2 ]
Tribollet, Bernard [1 ]
Vivier, Vincent [1 ]
机构：
[1] Univ Paris 06, CNRS, LISE UPR 15, F-75252 Paris 05, France
[2] Univ Toulouse, CIRIMAT, UPS INPT CNRS, ENSIACET, F-31077 Toulouse 04, France
来源：
CORROSION SCIENCE | 2009年 / 51卷 / 08期
关键词：
Alloy; Magnesium; EIS; SCANNING VIBRATING ELECTRODE; PHASE-ELEMENT BEHAVIOR; SODIUM-SULFATE SOLUTIONS; PITTING CORROSION; STAINLESS-STEELS; PURE MAGNESIUM; DISK ELECTRODE; SPECTROSCOPY; CHLORIDE; PERFORMANCE;
D O I：
10.1016/j.corsci.2009.05.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The electrochemical behaviour of an AZ91 magnesium alloy was investigated in a low aggressive medium by means of local and global electrochemical impedance measurements. The results were compared to those obtained on a pure magnesium sample. It was possible to show the individual contribution of each phase constituting the alloy, and it was observed that the corrosion mechanism of the two phases was the same, controlled by the Mg dissolution. However, local impedance diagrams clearly indicated that the kinetics dissolution of the beta-phase was slower than that of the alpha-phase, which was in good agreement with SEM observations. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1789 / 1794
页数：6
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