Abstract
Molten Salts Energy Storage (MSES) is one of the prime practices with high efficiency and long extended service in thermal energy storage method. The drawback in this MSES technology is storage material is subjected to corrosion and scaling can be formed on the surfaces, since it is continuously exposing to molten salts in aggravated temperature environment. To overcome this problem, the material can be coated with thermal barrier coating. In this current effort, Inconel 625 and Hastelloy X super alloy had been trailed as storage material with Yttria stabilized Zirconia coating. The specimens were heated with sodium sulphate molten salt at 1000 °C for 10, 15 and 20 Hours. The evaluation of both uncoated and YSZ coated specimens was done with test results of Tensile, Compression, Hardness and Impact tests. The Morphological study was done with SEM images and the knowledge on scaling was XRD analysis. The YSZ coated Inconel 625 specimens produced negligible differences in the majority of the experimental test values even after 20 h of heating with sodium sulphate molten salt. The results of the SEM and XRD analyses show that YSZ coated superalloy specimens experience less corrosion and oxidation than untreated specimens. Therefore, it might be advised that specimens of Inconel 625 that have been YSZ coated maintain high levels of corrosion resistance and can be used as MSES storage materials.
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