pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (34권6호 187-193)
The Effect of Ce Addition on Corrosion Behavior of Permanent Mold Casting Mg-4Al-2Sn-1Ca alloy
금형 주조한 Mg-4Al-2Sn-1Ca 합금의 부식 거동에 미치는 Ce첨가의 영향
Kyung Chul Park, Byeong Ho Kim, Jae Woong Jung, Dae Hyun Cho* and Ik Min Park*†
Defence Agency for Technology and Quality, Department of Material Science and Engineering, Pusan National University
In the present work, the effect of adding Ce on the corrosion behavior of Mg-4Al-2Sn- 1Ca alloy was investigated. The studied alloys were fabricated by gravity casting method and a potentiodynamic polarization, A.C. impedance and hydrogen evolution te tests were carried out in a 3.5% NaCl solution with pH 7.2 at room temperature to m measure the corrosion properties of Mg-4Al-2Sn-1CaxCe alloys. The microstructure of the Mg-4Al 4Al- 2Sn-1Ca alloy was composed of α-Mg, Mg17Al12, Mg2Sn and CaMgSn phase. Also, a Al Al11Ce3 phase was newly formed by the addition of Ce. With an increase of the Ce contents, t the microstructure became refined and the corrosion resistance improved.
Permanent mold casting, Mg-4Al-2Sn-1Ca-xCe alloy, Corrosion properties
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