| Title |
Effect of Si, Mn, Sn on Tensile and Corrosion Properties of Mg-4Zn-0.5Ca Alloys for Biodegradable Implant Materials |
| Authors |
조대현(Dae Hyun Cho); 남지훈(Ji Hoon Nam); 이병우(Byeong Woo Lee); 박지영(Ji Yong Park); 신현정(Hyun Jung Shin); 박익민(Ik Min Park) |
| DOI |
https://doi.org/10.3365/KJMM.2015.53.3.220 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
biomaterials; casting; corrosion; scanning electron microscopy (SEM); magnesium alloy |
| 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) |