Abstract
The anodic dissolution characteristics of nickel, molybdenum, and 304 stainless steel have been examined in pure and eutectic melt. Molybdenum and nickel show Tafel‐type dissolution kinetics in pure eutectic which permit estimates of long‐term corrosion rates as a function of voltage. Nickel exhibits a sharp threshold potential for dissolution in melt, forming a nonpassivating layer. Comparative voltammetry and open‐circuit potential measurements with iron in this melt suggest that care may be required in using nickel as an iron sulfide current collector. The anodic dissolution of 304 stainless steel in melt appears to be rate limited by diffusion through a reaction layer, showing a dependence that may be applicable to long‐term corrosion predictions. Dissolution is strongly inhibited by dissolved , apparently by formation of a protective anodic oxide layer. Molybdenum appears to owe its excellent anodic corrosion resistance in melt both to a chemically formed prepassive film and to a well‐defined anodic passivation process. However, repetitive cycling to voltages cathodic of 1.5V vs. the lithium electrode may be deleterious. Anodic corrosion of metals should, in general, occur more readily in the melt than in pure for straight‐forward thermodynamic reasons.
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