The Influence of Sn Addition on the Corrosion Behavior of Mg-5Al-1Zn Alloy
In the present work, the effect of Sn addition on the corrosion behavior of Mg-5Al-1Zn alloys was investigated. Microstructure, potentiodynamic polarization and immersion tests were carried out in 3.5% NaCl solution of pH 7.2 to estimate the corrosion behavior of AZ51 alloys with and without Sn addition. Mg17Al12 and Mg2Sn phases were mainly precipitated in inter-dendrite structures. With increasing the Sn content, the volume fraction of the Mg2Sn phase was increased and coarsening tendency was observed. The corrosion resistance was increased by Sn addition. Especially, the AZ51-5wt.%Sn alloy characterized the superior corrosion resistance among the four alloys. The Sn is known for a high hydrogen overvoitage and the secondary phases effectively formed the network structure, resulting in a drastically decreasing corrosion rate of AZ51 alloy.
Magnesium corrosion Potentiodynamic polarization Immersion test
Kyung Chul Park Byung Ho Kim Jong Jin Jeon Yong Ho Park Ik Min Park
Department of Materials Science and Engineering, Pusan National University San 30 Jangjeon-dong, Geumjeong-gu, Busan 609-735, Korea
国际会议
10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)
西安
英文
153-156
2009-01-13（万方平台首次上网日期，不代表论文的发表时间）