In-situ XAS measurements were performed on molten FLiNaK during the corrosion of Ni80-Cr20 foils in direct contact with FLiNaK salt inside a BN cell. The foils were 0.005 mm thick and approximately 9 mm wide coupons in the shape of a half moon (see Fig. ). The BN cell was then placed inside an alumina holder with a vertical shim for ease of placement and alignment at the top of the heating furnace (see Figs. and). The apparatus includes three electrodes for electrochemical measurements of the corrosion process.