Abstract
Corrosion of the reduction vessel induced by molten LiCl–Li 2O is an important problem in the lithium reduction technique for the spent nuclear fuel management. This study investigates the corrosion of nickel in molten LiCl–10 wt% Li 2O at 750 °C by immersion experiments, with the aim of unraveling the corrosion behavior. Nickel corrodes very fast in the melt, forming a layer of NiO, which is converted to Li 2Ni 8O 10 and then to LiNiO 2. The weight loss curve shows a linear rate law, which is owing to the harmful reaction between oxides and melt at the melt/scale boundary with the formation of the porous corrosion scale. The corrosion mechanism of nickel is also discussed.
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