| Title |
Corrosion behavior of die-cast Mg-4Al-2Sn-xCa alloy |
| Authors |
(Kyung Chul Park); (Dae Hyun Cho); (Byeong Ho Kim); (Kyung Ro Kim); (Ik Min Park) |
| DOI |
https://doi.org/10.3365/KJMM.2016.54.5.313 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
metals; casting; corrosion; scanning electron microscopy; SEM |
| 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) |