Abstract
The open circuit potential ( E corr) and oxidation rate ( I corr) of iron were measured in dry and wet NaNO 3 and KNO 3 melts at 340 °C. A shift of E corr in the positive direction and a higher oxidation rate were observed in wet melts in comparison with dry melts. The oxidation rate was almost 55% higher in KNO 3 melts than in NaNO 3 melts. To ascertain the effect of moisture on the cathodic reaction, a cyclic voltammetry study was carried out on platinum surface in dry and wet conditions of the melt. An increase of cathodic current in the presence of moisture in the melt is in good agreement with the increased oxidation rate of iron. A proportionate increase of oxidation rate was also noted in wet NaNO 3 and KNO 3 melts to those in their dry melts.
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