Critical Eccentricity Research Articles

Mass Transfer to an Eccentric Rotating Disk Electrode

The mass transfer rate to a rotating disk electrode rotated about an off‐center axis is calculated for eccentricities of from zero to 5 electrode radii. An asymptotic form for the transfer rate valid for large eccentricities is also derived and compared to two previous analyses. It is found that mass transfer is not affected until a critical eccentricity is reached and that the asymptotic expression provides a good approximation to the rate of mass transfer even at moderately small eccentricities. The analysis is supported by experimental data on the deposition of copper on several electrodes of eccentricities between 0.66 and 3.94.