Abstract
The effect of acidic and basic oxides on the corrosion of mild steel in NaNO3–KNO3 eutectic has been studied at 250°-450°c. Steady-state potential and weight gain were recorded with variations of additive concentrations and time. With increase of temperature and concentration the acidic oxides, NaPO3 and K2Cr2O7, increased the corrosion of steel while the basic oxides, Na2O2 and KOH, had in general a retarding effect. However, beyond 400°c, basic oxides appeared to increase the corrosion rate.
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