Novel LiNO_3-NaNO_3-KNO_3-NaNO_2 Molten Salts for Solar Thermal Energy Storage Applications

摘要

The corrosion of stainless steel SS316L in a low melting point novel LiNO_3-NaNO_3-KNO_3-NaNO_2 eutectic molten salt mixture was investigated at 695K. After long-term isothermal dipping corrosion experiments, the SS316L samples were analyzed using scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS) to determine the topography and corrosion products. Dense and protective lithium iron oxide scale formed on the surface and prevented the SS316L sample from further severe corrosion. Therefore, SS316L is considered to be suitable construction material for solar thermal energy storage materials containers.