The operating temperature of a steam turbine is limited to 565 °C by the molten nitrate heat-transfer fluid; therefore, molten-salt CSP technologies require alternative salt chemistries such as chloride. The prevention of high-temperature corrosion on containment materials plays a critical role, and a corrosion mitigation plan is needed to achieve the target plant lifetime of 30 years. This paper performed a materials screening test, using a eutectic ternary chloride molten salt, composed by 20.4 wt. % KCl + 55.1 wt. % MgCl₂ + 24.5 wt. % NaCl, in stainless steel (AISI 304) and two Ni base materials (Inconel 702 and Haynes 224). The corrosion mechanism and corrosion rates were obtained through electrochemical impedance spectroscopy (EIS). Ni base alloys showed a protective scale layer during 8 hours of immersion with a corrosion rate of 6.34 mm/year (In702) and 3.12 mm/year (HR224). Monitoring corrosion results were confirmed by scanning electron microscopy (SEM) and X-ray diffraction (XRD), obtaining alumina and chromia protective layers.

熔融硝酸盐传热流体将蒸汽轮机的运行温度限制为565°C；因此，熔融盐CSP技术需要替代性的盐化学方法，例如氯化物。防止安全壳材料上的高温腐蚀起着至关重要的作用，因此需要制定腐蚀缓解计划以实现30年的目标设备使用寿命。本文使用由20.4 wt。％的三元氯化物共熔盐进行了材料筛选测试。氯化钾+ 55.1重量％％氯化镁₂ + 24.5重量 在不锈钢（AISI 304）和两种镍基材料（Inconel 702和Haynes 224）中添加％NaCl。腐蚀机理和腐蚀速率是通过电化学阻抗谱（EIS）获得的。镍基合金在浸入8小时后显示出一层保护垢层，腐蚀速率为6.34毫米/年（In702）和3.12毫米/年（HR224）。通过扫描电子显微镜（SEM）和X射线衍射（XRD）确认腐蚀监测结果，获得氧化铝和氧化铬保护层。