Abstract
The anodic oxidation of platinum, nickel, molybdenum and tungsten has been studied at 350°C in a dehydrated AgCl—KCl eutectic melt (70-30 per cent in mole). The reference electrode was the Ag/AgCl ( x = 0·700) system contained in a closed tube of pyrex. The current-potential curves were obtained on vibrating microelectrodes at 50 mV/min. The anodic dissolution of these metals under potentiostatic conditions produces Ni(II), Mo(III) and W(III). The analysis of the potential-time curves under galvanostatic conditions and in open circuit, allowed to detect the superficial formation of some oxidation products on the electrode and to compare their solubilities and their chemical stabilities in the eutectic melt.
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