Effect of Nd on the microstructure and corrosion behavior of Mg-Gd-Nd-Zr alloys. (21st April 2021)

• Record Type: Journal Article
• Authors: Bao, Jian; Li, Quanan; Chen, Xiaoya; Zhang, Qian; Chen, Ziyi
• Is Part Of: Materials research express. Volume 8:Number 4(2021)
• Publication Date: 2021-04-21
• Subjects: Mg-Gd-Nd-Zr alloy -- microstructure -- corrosion behavior -- corrosion mechanism -- electrochemical test; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/abf52f
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: The corrosion behavior of Mg-12.5Gd- x Nd-0.3Zr ( x = 1, 2, 3 wt%) alloys were investigated by weight loss tests and electrochemical measurements in 3.5% NaCl solution. The results show that the increase of Nd content refine the grains gradually and promote the precipitates. Mg-12.5Gd- x Nd-0.3Zr alloy is composed of α -Mg and Mg5 Gd and Nd41 Mg5 phase, and the semi-continuous phase is formed with addition of 3% Nd. The corrosion resistance of Mg-12.5Gd- x Nd-0.3Zr alloys sharply increases with the increase of Nd element by weight loss tests and the tendency is proven by means of electrochemical measurements. The corrosion resistance is improved when Nd content increases from 1% to 3% owning to the diminishing grain size and the change of distribution for second phase. The second phase play a dual effect on corrosion which depend on its distribution.