Microstructure and corrosion resistance of a Mg2Sn-dispersed Mg alloy subjected to pulsed electron beam treatment

Journal of Magnesium and Alloys

Daseul Lee¹  Beomcheol Kim¹  Sung Soo Park¹  Soo-Min Baek¹  Jung Gu Lee²  Jisoo Kim³  Hyung Wook Park³ 

[1] School of Materials Science and Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea;School of Materials Science and Engineering, University of Ulsan, Ulsan 44610, Republic of Korea;School of Mechanical, Aerospace and Nuclear Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea;

关键词: Magnesium alloy;    Mg2Sn;    Intermetallic compound;    Pulsed electron beam treatment;    Corrosion;   

DOI  :  

来源: DOAJ

【 摘 要 】

We report that the corrosion resistance of a Mg–Sn-based alloy with Mg2Sn precipitates can be considerably improved by surface modification using pulsed electron beam treatment. The alloy subjected to a pulse electron beam treatment showed a modified surface layer with a thickness of ∼12 µm, appearing more resistant to corrosion attack than the bare surface of the alloy. In 0.6 M NaCl solution, the alloys with and without the surface modification exhibited average corrosion rates of 4.3 and 8.1 mm y −1, respectively. The improved corrosion resistance was attributed to reduced cathodic activation, resulting from the surficial reduction of relatively noble Mg2Sn precipitates.

【 授权许可】

Unknown