The Corrosion Resistance of Type 316 Stainless Steel to Li2BeF4

摘要

The corrosion rate of type 316 stainless steel in molten LiF-BeF2 (66-34 mole %) has been measured in a thermal-convection loop operating with a maximum temperature of 650°C and a temperature difference of 160°C. The corrosion rate was correlated with the concentration of impurities in the salt and with the fluoride ion oxidation potential as determined by an on-line voltameter.nA corrosion rate of —10 um/year was observed initially in the as-received salt. This rate decreased as reactions with initial salt impurities went to completion. Direct addition of beryllium metal to the salt further reduced the corrosion rate.