The rate of mass transfer at a rotating cylindrical electrode with wiper blades

A theoretical analysis of mass transfer at a rotating cylindrical electrode with wiper blades yields the dimensionless equation where w is the number of the symmetrically located wiper blades, d is the wiper blade thickness and R₁ is the radius of the wiped electrode. Nu_R, Re_R and Sc are defined in terms of the cell and electrolyte parameters. Experimental evidence via the reduction of oxygen and ferrocyanide ions indicates that mass transfer rates can thus be predicted at no more than ±5% inaccuracy for Sc > 200. The two-wiper blade system is shown to effect an increase in mass transfer rates by a factor of 7–8 with respect to a rotating cylindrical electrode without wiper blades.