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Vol.54, No.5, 313 ~ 322, 2016
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| Title |
| Corrosion behavior of die-cast Mg-4Al-2Sn-xCa alloy |
| Kyung Chul Park , Dae Hyun Cho , Byeong Ho Kim , Kyung Ro Kim , Ik Min Park |
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| Abstract |
| In the present work, the effect of Ca additions on microstructure and corrosion characteristics of high pressure die-cast Mg-4Al-2Sn alloy has been investigated. Mg-4Al-2Sn-xCa (x= 0, 0.3 and 0.7wt.%) alloy was prepared by using a high pressure die-casting method. Results indicated that the microstructure of Mg-4Al-2Sn alloy consisted of α-Mg, Mg17Al12 and Mg2Sn phase. With increase of Ca additions, CaMgSn phase was newly formed and grain size was sharply decreased. From the test results, the corrosion resistance of die-cast Mg-4Al-2Sn alloy was significantly improved by Ca addition. It is considered that stabilization of Mg(OH)2 layer and refinements of microstructure with increase of Ca additions. (Received October 14, 2015) |
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| Key Words |
| metals, casting, corrosion, scanning electron microscopy, SEM |
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