Influence of the microstructure on the corrosion behavior of AXJ530 magnesium alloy in 3.5% NaCl solution

被引：48

作者：

Amira, S. ^{[1
]}

Dube, D. ^{[1
]}

Tremblay, R. ^{[1
]}

Ghali, E. ^{[1
]}

机构：

[1] Univ Laval, Dept Min Met & Mat Engn, Quebec City, PQ G1K 7P4, Canada

来源：

MATERIALS CHARACTERIZATION | 2008年 / 59卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

corrosion; AXJ530 magnesium alloy; microstructure; polarization study; electrochemical noise analysis; immersion test;

D O I：

10.1016/j.matchar.2008.01.018

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

The influence of the microstructure on the corrosion behavior of AXJ530 magnesium alloy has been investigated at room temperature in a 3.5% NaCl solution at pH 6 and 25 degrees C. Specimens of AXJ530 alloy were cut out from ingots and from billets cast in permanent mould with and without electromagnetic stirring. The corrosion behavior of the AXJ530 specimens was studied by potentiodynamic polarization, electrochemical noise analysis, and immersion tests. The phase composition, the morphology of corroded surface and its evolution with time were also analyzed. Potentiodynamic polarization studies and electrochemical noise analysis indicate that the corrosion resistance of ingot specimens is lower than the specimens cut from billets. A study of the surface of specimens after immersion tests has shown that the different corrosion behavior can be ascribed to the specific morphology, distribution and volume fraction of phases in the microstructure of specimens. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：1508 / 1517

页数：10

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