Diffusion Controlled Corrosion in Gas Sparged Systems

S. A. Nosier, M. I. El-Khiary, M. A. Nasr and A. A. Mubarak

Abstract
The rate of diffusion – controlled corrosion of the walls of rectangular bubble column and a liquid has been studied with the copper dissolution technique. Variables studied were superficial air velocity, initial height of solution in the column, physical properties of the solution, and the presence of suspended solids with different concentrations and different particle diameter. The rate of diffusion – controlled corrosion in solution free solids was given by the equation J = 0.232 (Fr · Re)–0.22 (L/de)–0.169 while for the presence of suspended solids, the data were correlated by the equation J = 0.171 (Fr · Re)–0.214(L/d p) 0.187 The presence of suspended solids increases the rate of diffusion – controlled corrosion by an amount ranging from 5 to 16 %.

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Keywords
Bubble columns, mass transfer, diffusion – controlled corrosion, suspended solids