Effect of Temperature on the Solubility of Metallic Magnesium in Molten MgCl2-KCl-NaCl
Effect of Temperature on the Solubility of Metallic Magnesium in Molten MgCl2-KCl-NaCl
复制标题
温度对金属镁在熔融MgCl2-KCl-NaCl中溶解度的影响
DOI：
10.1007/s11837-022-05537-0
复制
发表时间：
2023
期刊：
影响因子：
2.6
通讯作者：
Simpson, Michael F.
中科院分区：
文献类型：
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作者：
Fuelling, Kalyn M.;Dale, Olivia R.;Choi, Suhee;Simpson, Michael F.
在500°C、600°C和650°C下进行镁金属在熔融MgCl 2-KCl-NaCl中的溶解度实验。这项研究有助于了解如何控制盐在聚光太阳能发电厂和先进核反应堆等系统中用于高温传热和储存时的腐蚀性。金属溶解是降低盐的氧化还原电位的可行选择，这将降低接触结构金属合金的腐蚀速率。通过测量盐样品在水中溶解过程中产生的H2的体积来确定盐混合物中金属镁的浓度。W工作电极和Ag之间的开路电位|AgCl参比电极用于确定何时达到平衡。发现溶解的Mg金属浓度在0.32wt.%和0.58重量%通过氢气收集，这是通过测量镁棒质量损失证实。
Solubility experiments for magnesium metal in molten MgCl2-KCl-NaCl were run at 500°C, 600°C, and 650°C. This study is relevant for understanding how to control corrosivity of the salt when used for high-temperature heat transfer and storage in systems such as concentrating solar power plants and advanced nuclear reactors. Metal dissolution is a viable option for reducing the redox potential of the salt, which should reduce the rate of corrosion of contacting structural metal alloys. Concentration of metallic magnesium in the salt mixture was determined via measurement of the volume of H2generated during dissolution of salt samples in water. Open circuit potential between a W working electrode and Ag|AgCl reference electrode was used to determine when equilibrium had been achieved. The dissolved Mg metal concentration was found to vary between 0.32 wt.% and 0.58 wt.% by hydrogen collection, which was confirmed by measurement of Mg rod mass loss.