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Vol.46, No.5, 304 ~ 310, 2008
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| Title |
| Effect of Sb and Sr Addition on Corrosion Properties of Mg-5Al-2Si Alloy |
| 전종진 Jong Jin Jeon , 이상원 Sang Won Lee , 김병호 Byeong Ho Kim , 박봉규 Bong Gyu Park , 박용호 Yong Ho Park , 박익민 Ik Min Park |
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| Abstract |
| Magnesium alloys containing Mg2Si particles, as a promising cheap heat-resistant magnesium alloy for automobile power train parts applications, are attracting more attention of both material scientists and design engineers. Modification of the Chinese script shape Mg2Si particle is a key for using this alloy in sand or permanent mould casting. In the present work, the modification effect of Sr and Sb on the corrosion properties of the Mg-5Al-2Si alloy was investigated. Sr or Sb addition promoted the formation of fine polygonal shape Mg2Si particles by providing the nucleation sites. Sr was more effective element than Sb for shape modification of Chinese script shape Mg2Si. Such improved microstructure of the modified alloy resulted in large improvement in corrosion resistance as compared to unmodified Mg-5Al-2Si alloy. |
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| Key Words |
| modification, heat-resistant Mg, chinese script Mg2Si, polygon Mg2Si, corrosion |
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