ANODIC-DISSOLUTION MECHANISM OF FE-MO BIN ARY-ALLOYS USING CHANNEL FLOW MULTIELECTRODE SYSTEM IN ACIDIC SULFATE-SOLUTION

Anodic dissolution mechanism of iron-molybdenum binary alloys in acidi c sulfate solution was investigated using channel flow multi-electrode system. Zn the active potential region, Fe-Mo alloys dissolved as Fe( II), Mo(V) and Mo(VI), and the amount of Mo(VI) dissolved was much sma ller than those of other ions. The dissolution current of those ions w as calculated by the collector electrode current at -0.6V, 0.5V and 1. 4V, simultaneously. The ratio of dissolution currents, I-diss,I-Mo(V) and I-diss,I-Fe(II), to the working electrode current was equal to the bulk alloy composition. As a result of the current transient measurem ent of collector electrode applied by the current step of the working electrode, the dissolution of alloy is inhibited by the molybdenum ads orbed on the working electrode surface.