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Vol.53, No.3, 220 ~ 231, 2015
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| Title |
| Effect of Si, Mn, Sn on Tensile and Corrosion Properties of Mg-4Zn-0.5Ca Alloys for Biodegradable Implant Materials |
| 조대현 Dae Hyun Cho , 남지훈 Ji Hoon Nam , 이병우 Byeong Woo Lee , 박지영 Ji Yong Park , 신현정 Hyun Jung Shin , 박익민 Ik Min Park |
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| Abstract |
| Effect of elements Si, Mn, Sn on tensile and corrosion properties of Mg-4Zn-0.5Ca alloys were investigated. The results of tensile properties show that the yield strength, ultimate tensile strength and elongation of Mg-4Zn-0.5Ca alloy increased significantly with the addition of 0.6 wt% Mn. This is considered the grain refinement effect due to addition of Mn. However addition of 0.6 wt% Si decreased yield strength, ultimate tensile strength and elongation. The bio-corrosion behavior of Mg-4Zn-0.5Ca-X alloys were investigated using immersion tests and potentiodynamic polarization test in Hank``s solution. Immersion test showed that corrosion rate of Mg-4Zn-0.5Ca-0.6Mn alloy was the lowest rate and addition of 1.0 wt% Sn accelerated corrosion rate due to micro-galvanic effect in α-Mg/CaMgSn phases interface. And corrosion potential (Ecorr) of Mg-4Zn-0.5Ca-0.6Mn alloy was the most noble among Mg-4Zn-0.5Ca-X alloys.(Received April 2, 2014) |
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| Key Words |
| biomaterials, casting, corrosion, scanning electron microscopy (SEM), magnesium alloy |
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