A series of salts as candidate for potential application in solar plant such as alkali nitrates, carbonates, sulphates or phosphates were investigated in large range of temperature (200–1000 C) in direct contact with IACW.
The stability of the inertised product in presence of the molten salts has been followed by coupling different approaches.
The first one is an original approach by high temperature nuclear magnetic resonance (HT NMR) consisting in following in situ the evolution of the molten salt during the first time of corrosion.
The evolution of the NMR signal of the molten salt with time is related to dissolution effects and the local environment in the liquid can be correlated to corrosion.
The second one is a classical post-mortem analysis of the inerted material with solidified melt after attack, by X-ray diffraction and scanning electron microscopy.
No corrosion of IACW is observed in the case of the nitrate contrary to the other salts. Only direct contact between the nitrate and the IACW can be considered.
The combination between these two materials as heat storage material could help to reduce the total investment and environmental costs of concentrated solar power plants.
Similar hybridisationห could be further validated for other PCMs systems based on new eutectics still under studies.