Electrochemical behavior of Mg-Al-Zn-Ga-In alloy as the anode for seawater-activated battery. (15th March 2020)

• Record Type: Journal Article
• Authors: Li, Jiarun; Chen, Zhuoyuan; Jing, Jiangping; Hou, Jian
• Is Part Of: Journal of materials science & technology. Volume 41(2020)
• Page Start: 33
• Page End: 42
• Publication Date: 2020-03-15
• Subjects: Magnesium alloy -- Corrosion -- Electrochemical behavior -- Anode -- Seawater-activated battery; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2019.08.052
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: The effect of indium alloying on the corrosion and discharge behaviors of Mg-Al-Zn-Ga alloys is investigated via materials characterization, immersion test and electrochemical methods. The results indicate that indium alloying can effectively modify the distribution of intermetallic phases in Mg matrix via promoting the segregation of Al in the form of Mg17 Al12 in matrix. The addition of indium can effectively activate Mg-Al-Zn-Ga alloy evidenced by increased hydrogen evolution volume and weight loss, negative shift of corrosion and discharge potentials, increase of corrosion current density, decrease of polarization resistance and promoted Faradic efficiency. Nonetheless, excessive indium alloying (2.0 wt.%) would strikingly deteriorate the electrochemical performance of Mg-Al-Zn-Ga anode due to the exorbitant active effect. The Mg-6 wt.%Al-3 wt.%Zn-1 wt.%Ga-1 wt.%In in as-cast state with acceptable corrosion rate and desirable discharge performance is a low cost, non-toxic and well-performance magnesium alloy, which is a promising anode materials for seawater-activated batteries.