Microcapillary polarization measurements of friction stir spot welds made in AZ31B magnesium alloy

被引：11
作者：
Savguira, Y. [1 ]
North, T. H. [1 ]
Thorpe, S. J. [1 ]
机构：
[1] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2014年 / 65卷 / 11期
基金：
加拿大自然科学与工程研究理事会;
关键词：
MG-ALLOY; MECHANICAL-PROPERTIES; LOCALIZED CORROSION; MICROSTRUCTURE; MICROELECTRODES; RESISTANCE; EVOLUTION; BEHAVIOR; CHLORIDE; CRACKING;
D O I：
10.1002/maco.201307410
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microcapillary polarization procedures were optimized to examine the corrosion characteristics of the various microstructural zones developed during friction stir spot welds made in AZ31 magnesium alloy. Tungsten carbide tracing confirmed the location and shape of the stir zone in the weldment. The stir zone was determined to be the noble region while the base metal and the thermomechanically affected zone were found to be active. The thermo- mechanically affected zone was found to be most susceptible to localized corrosion attack due to its proximity to the noble stir zone, and the subsequent formation of a macrogalvanic cell. Corrosion rates of individual weld regions were measured.
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收藏
页码：1055 / 1061
页数：7
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