The corrosion resistance and discharge performance of as-extruded AZ91 alloy synergistically improved by the addition of submicron SiCp

Lv, Xin; Deng, Kun-kun; Wang, Cuiju; Nie, Kai-bo; Shi, Qing; Niu, Hao-yi

doi:10.1016/j.electacta.2023.141843

Cited by 6 publications

(2 citation statements)

References 60 publications

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“…Furthermore, alloying methods have been routinely used to inhibit the self-corrosion of magnesium anodes and to improve discharge efficiency. , In recent years, numerous scholars have endeavored to enhance magnesium anode performance by incorporating alloying elements with standard electrode potentials either higher or lower than magnesium. While some contend that adding high-potential alloying elements elevates substrate potential and diminishes galvanic corrosion by reducing potential discrepancies, − others posit that introducing elements with negative potential actually decreases the voltage (increasing the potential) of the magnesium substrate . These researchers consider the standard electrode potential of alloying elements as a vital metric for evaluating the promise of Mg-air battery anode materials.…”

Section: Introductionmentioning

confidence: 99%

Modulation of the Discharge and Corrosion Properties of Aqueous Mg-Air Batteries by Alloying from First-Principles Theory

et al. 2023

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Mg-air batteries have been rapidly developed with the proposal of several corrosion inhibition strategies for magnesium anodes. However, researchers have been puzzled by the limited improvement in discharge voltage caused by alloying and the theoretical mechanism of alloying on corrosion. Here, a detailed thermodynamic study was carried out combined with the stepwise hydroxide-assisted mechanism for metal dissolution in alkaline media and the Mg7B (B is the alloying elements) alloy model using first-principles theory. The effects of alloying on the discharge voltage and corrosion of magnesium anodes were simulated for alloying elements intensively investigated. The results indicate that within the range of electrochemical polarization, the discharging of Mg-air batteries at high current densities has a large overpotential while the impact of alloying on the voltage of Mg-air batteries is less than 0.15 V at high current densities. Consequently, without considering other polarization reductions, alloying cannot profoundly change the discharge voltage of Mg-air batteries; contrarily, an increase in corrosion resistance will result in a decrease in voltage for elements with an electrode potential higher than magnesium.

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Section: Introductionmentioning

confidence: 99%

Modulation of the Discharge and Corrosion Properties of Aqueous Mg-Air Batteries by Alloying from First-Principles Theory

et al. 2023

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“…Magnesium, which has negative standard electrode potential (−2.37 V vs standard hydrogen electrode), high faradic capacity (2.2 A h g −1 ), and abundant reserves, is a very desirable anode material. [3][4][5][6][7] However, pure magnesium has two obvious disadvantages as the anode of seawater battery. Firstly, the self-discharge rate of magnesium is high, which leads to a low efficiency of its utilization.…”

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confidence: 99%

Effects of Deformation Microstructures on the Electrochemical Properties of Mg-Hg-Ga Alloy Anode

Yang,

Wang,

Wang

et al. 2024

J. Electrochem. Soc.

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Mg-Hg-Ga alloy is one of the anode materials for seawater-activated batteries. Here, Mg-3.0 wt%Hg-3.0 wt%Ga alloys were prepared by extrusion and rolling and the microstructure of the Mg-3.0 wt%Hg-3.0 wt%Ga alloy after plastic deformation was studied. The effects of deformation microstructures on the discharge properties and corrosion behavior of the alloys were investigated by galvanostatic discharge, potentiodynamic polarization, electrochemical impedance spectra experiments, and Mg/AgCl battery test. The results show that the microstructure of the extruded alloy is uniform, and the corrosion activity and discharge activity of the extruded alloy are relatively weak. Hot rolling deformation refines the grains and promotes the precipitation of the Mg5Ga2 phase distribute more dispersively, which results in faster and more uniform activation of the alloy, thus improving the corrosion activity and discharge activity of the Mg-3.0 wt%Hg-3.0 wt%Ga alloy. The results of galvanostatic discharge in half battery and Mg/AgCl battery discharge tests show that rolling deformation improves the discharge properties of the alloy, and the alloy with 78% rolling reduction has the best discharge performance.

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Quantifying the influence of microstructure on the corrosion of Mg-Li alloys by using X-ray CT

Tian,

Wang,

Zhang

et al. 2024

Corrosion Science

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The corrosion resistance and discharge performance of as-extruded AZ91 alloy synergistically improved by the addition of submicron SiCp

Cited by 6 publications

References 60 publications

Modulation of the Discharge and Corrosion Properties of Aqueous Mg-Air Batteries by Alloying from First-Principles Theory

Modulation of the Discharge and Corrosion Properties of Aqueous Mg-Air Batteries by Alloying from First-Principles Theory

Effects of Deformation Microstructures on the Electrochemical Properties of Mg-Hg-Ga Alloy Anode

Quantifying the influence of microstructure on the corrosion of Mg-Li alloys by using X-ray CT

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