Thermal Energy Storage (TES) for Concentrated Solar Power (CSP) applications is a vital part of bringing green technologies to cost parity with traditional fuel-based power. Eutectic salt mixtures are highly suitable for use in TES. However, they contain impurities that can detrimentally impact their performance and corrosion characteristics when stored in a metallic container. This review will present a summary of findings that delve into the characterization, quantification, and, most importantly, the mitigation and control of these contaminants. Some of the common impurities discovered in commercially available salts include O₂, H⁺ and OH⁻, all of which highly accelerate corrosion. Other contaminants include chloride, fluoride, perchlorate, sulfate, carbonate and nitrite/nitrate compounds. Purification, monitoring, and control of impurities are presented; including heat processing, gas sparging, additives, acid consumption analysis, voltammetry methods, and physical filtration. Finally, recommendations are made for the most appropriate strategies for mitigating impurities for CSP applications.

用于集中式太阳能（CSP）应用的热能存储（TES）是使绿色技术与传统燃料基电力实现成本均等的重要组成部分。低共熔盐混合物非常适合用于TES。但是，它们包含的杂质在存储在金属容器中时会对其性能和腐蚀特性产生不利影响。这篇综述将总结研究结果，深入研究这些污染物的特征，量化以及最重要的是减轻和控制这些污染物。一些常见的杂质发现在市售的盐包括O- ₂，H ⁺和OH ^-，所有这些都会大大加速腐蚀。其他污染物包括氯化物，氟化物，高氯酸盐，硫酸盐，碳酸盐和亚硝酸盐/硝酸盐化合物。介绍了杂质的纯化，监测和控制；包括热处理，气体喷射，添加剂，酸消耗分析，伏安法和物理过滤。最后，针对减轻CSP应用中杂质的最合适策略提出了建议。