pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (35권2호 36-43)
The Effect of Al and Sn Additions on Corrosion Behavior of Permanent Mold Casting Magnesium Alloy
금형 주조한 마그네슘 합금의 부식 거동에 미치는 Al 및 Sn의 영향
Byeong Ho Kim, Jae Hyun Seo and Kyung Chul Park†
Defence Agency for Technology and Quality,
In this study, the influences of aluminum and tin additions (individual and combined) on corrosion behavior of magnesium alloy have been determined. The studied alloys were fabricated by permanent mold casting method to measure the corrosion properties, a potentiodynamic test, hydrogen evolution test and immersion test were carried out in a 3.5% NaCl solution at pH 7.2. From the results of microstructure analysis, the Mg-9Al-1Zn alloy was found to be composed of α-Mg and rod-like Mg17Al12 phase and the Mg-5Sn-5Al-1Zn alloy was found to be composed of α-Mg, rod-like Mg17Al12 and Mg2Sn phases. In the case of the Mg- 9Sn-1Zn alloy, the microstructure was composed of α-Mg and eutectic Mg2Sn phase. With Sn addition (individual and combined), the corrosion resistance of the Mg alloys improved.
Permanent mold casting, Magnesium alloy, Corrosion properties.
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