Cobalt cylinders having the top andddp andd bottom faces capped with molybdenum were rotated at the speeds of 260, 600,The dependence of the dissolution rate of the cylinders on the concentration of cobalt in the bulk liquid was observed.cm • sec-z. The activation energies for the dissolution processes at the rotational speeds of 260 and 600 rpm were 12.7 and 13.7 kcal mol-1, respectively. The rate constant was found to vary with the 0.76 to the 0.94 power of the Reynolds the bulk liquid was observed and was discussed on the basis of the thermodynamic expression for diffusion. The results of this investigation suggest that the dissolution process is diffusion controlled. Oxygen increases markedly the dissolution rate.
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