The effect of the V2O5–NaVO3 ratio on the corrosion resistance of Cr at different temperatures has been studied. The corrosion performance was determined by mass loss and electrochemical techniques. The corrosion resistance of Cr depends on the stability of the oxide layer grown, the testing temperature and the characteristics of the melt. Cr has good corrosion resistance up to 700 °C. Above 700 °C its corrosion resistance decreases since the solubility of the protective oxide formed increases. The corrosiveness of vanadium salts depends not only of its ability to absorb oxygen but also of the type of vanadium compound.