Microstructure effects on the electrochemical corrosion properties of Mg – 4.1% Ga – 2.2% Hg alloy as the anode for seawater-activated batteries

Yu, Kun; Tan, Xin; Hu, Yanan; Chen, Fuwen; Li, Shaojun

doi:10.1016/j.corsci.2011.01.040

Cited by 66 publications

(21 citation statements)

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“…Hence, studies for improving anode performance have also been conducted. It is generally recognized that doping with minor alloying elements (e.g., aluminum, zinc, gallium, indium, manganese, and mercury [12-14]) optimizes anode performance via facilitating the self-peeling of corrosion products and alleviating self-discharge [15,16]. Therefore, a fundamental understanding of the corrosion characteristics of magnesium alloys independent of the individual applications considered should be clearly outlined as a basis for further investigations.…”

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confidence: 99%

Effect of heat treatment on corrosion behavior of AZ63 magnesium alloy in 3.5 wt.% sodium chloride solution

et al. 2016

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The as-cast, homogenized, and peak-aged AZ63 alloys are investigated via microstructure observation, EDS analysis, hydrogen evolution, and electrochemical tests. The results suggest that the heat treatments exert an influence on the corrosion behavior of AZ63 alloy via the microstructure transformation. The corrosion of homogenized alloy is retarded by protective oxide layer at first, but achieves highest corrosion rate among the three alloys owing to the less protective products film. The micro-galvanic couples endow the as-cast and peak-aged alloys high dissolution activity, but the adhesive products alleviate the corrosion. Two models are proposed to interpret the dissolution mechanism for these alloys.

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confidence: 99%

Effect of heat treatment on corrosion behavior of AZ63 magnesium alloy in 3.5 wt.% sodium chloride solution

et al. 2016

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“…If the distribution of Mg 3 Hg in the alloy is uniform, then the volume ratio of Mg 3 Hg is equal to the area ratio. The volume ratio of V MH to V can be written as eq.…”

Section: Resultsmentioning

confidence: 99%

“…4) Intermetallic compound Mg 3 Hg, which formed by adding an appropriate amount of Hg, could inhibit microgalvanic corrosion and prevent the formation of thick corrosion product films on the matrix surfaces; the second phase of Mg 3 Hg can also activate the magnesium matrix, improve peak voltage and effective discharge time. For magnesium alloy anode materials, the content of alloying elements is an important factor in determining performance.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Maximum Solid Solubility in Mg–Hg Alloys by the Lever Rule

Wang

2013

Mater. Trans.

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The microstructures of MgHg alloys with 1.12.9 mass% Hg were investigated in this paper. Under the non-equilibrium solidification condition, the examined MgHg alloys had a two-phase structure consisting of a solid solution phase and a spheroidal-graphite iron-like divorced eutectic. Eutectic ¡-Mg and eutectic Mg 3 Hg formed separately, so the proportion of eutectic Mg 3 Hg could be accurately measured. A method was proposed to estimate the maximum solid solubility of Hg in Mg under the non-equilibrium solidification condition by measuring the area fraction of Mg 3 Hg in metallographes. The maximum solid solubility of Mg2.4 mass% Hg was 0.81 and 0.69 mass%, with cooling rates of 0.67 and 2.0 K/s, respectively. The maximum solid solubility decreased as the cooling rate increased and increased as the Hg content increased.

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“…The side reactions that occur result in the formation of magnesium hydroxide, which has low conductivity properties (Yu et al, 2011;Zhao et al, 2011;Yu et al, 2012;Wang et al, 2012;Chen et al, 2013). During the reaction process of magnesium batteries that are activated by sea water, hydrogen is formed on the cathode, creating a pumping action that helps clean the magnesium hydroxide, which is not soluble in the battery system.…”

Section: Discharge Phenomenon Of a Magnesium Battery Activated By Seamentioning

confidence: 99%

Evaluation of the Dynamic Modeling and Discharge Performance of a Magnesium Battery Activated by Seawater

Supriyono¹

2018

IJTech

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This study focuses on an evaluation of the dynamic modeling and discharge performance of magnesium battery activated by sea water. Modeling is important to determine the optimum condition of battery discharge operation. The modeling was performed by modifying the Shepherd model approach by combining an Rint equivalent circuit model to avoid the looping algorithm problem. Initial parameters were obtained from battery discharge manufacturing data on open operating systems. The battery anode used magnesium foil, the cathode used carbon, while the electrolyte used 3.5%wt NaCl solution. The battery discharge test to obtain manufacturing data was carried out with variations in current loads of 0.01 C, 0.05 C and 0.1 C until the potential and current were zero. Battery discharge performance evaluation can also be performed from manufacturing data analysis. Potential battery discharge decreased from ±1.49 V to ±1.30 V, while the battery discharge potential was relatively stable at ±1.30 V to the SOCmin potential value (±1.29 V). It can be seen from the different values of exponential and nominal potential that the parameters were not too significant. The modeling has convergence on the discharge parameters, such as E0 = 1.303 V; R = 0.012 Ω; Kdr = 0.01 Ω; Kdv = 5.794×10-4 V/A.h A = 0.195 V; and B = 140 (A.h)-1. The SOCmin value of 5% indicates a minimum limit of battery operation that is permitted for battery performance to drop suddenly. The SOCmax value of 93% indicates the maximum allowable limit for the battery to operate stably. The percentage of simulated data error compared to the manufacturing data is 0.85%.

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Microstructure effects on the electrochemical corrosion properties of Mg – 4.1% Ga – 2.2% Hg alloy as the anode for seawater-activated batteries

Cited by 66 publications

References 15 publications

Effect of heat treatment on corrosion behavior of AZ63 magnesium alloy in 3.5 wt.% sodium chloride solution

Effect of heat treatment on corrosion behavior of AZ63 magnesium alloy in 3.5 wt.% sodium chloride solution

Estimation of Maximum Solid Solubility in Mg–Hg Alloys by the Lever Rule

Evaluation of the Dynamic Modeling and Discharge Performance of a Magnesium Battery Activated by Seawater

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Microstructure effects on the electrochemical corrosion properties of Mg – 4.1% Ga – 2.2% Hg alloy as the anode for seawater-activated batteries

Cited by 66 publications

References 15 publications

Effect of heat treatment on corrosion behavior of AZ63 magnesium alloy in 3.5 wt.% sodium chloride solution

Effect of heat treatment on corrosion behavior of AZ63 magnesium alloy in 3.5 wt.% sodium chloride solution

Estimation of Maximum Solid Solubility in Mg&ndash;Hg Alloys by the Lever Rule

Evaluation of the Dynamic Modeling and Discharge Performance of a Magnesium Battery Activated by Seawater

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Estimation of Maximum Solid Solubility in Mg–Hg Alloys by the Lever Rule