Mass Transfer to a Rough Rotating Cylinder

Abstract

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The rotating cylinder electrode for studies of corrosion engineering and protection of metals—An illustrated review

“…Similar relationships have been derived for rough surfaces [5,8,63,64]. The effect of roughness for the RCE in the presence of static turbulence promoters has been considered [38, 57,[65][66][67][68] with an emphasis on metal ion recovery [69,70].…”

“…Roughened electrodes [5,6,8,9,11,20] include the longitudinal finned electrode, knurled (staggered) diamond pyramid surface electrodes, an RCE wrapped with cylindrical wire electrode and a metal powder deposit on an RCE.…”

“…Typically, a linear correlation having standard deviation of around 17% and up to 18% deviation from the ETW correlation is involved [56]. Incorporating the friction factor described in equation (4), into the ETW correlation produces a modified Chiton-Colburn type relationship [5]:…”

“…Controlled studies at high mass transport conditions are enabled by rotating cylinder electrodes [5,6,8,11,18], due to their uniform primary and secondary current distributions and easily achievement of turbulent flow [71,72]. Provided that the turbulence is only due to electrode rotation, dimensionless group correlations can be used to describe the mass transport rate [5,9,18]:…”

“…The wall-jet disc electrode tends to be less convenient and more difficult to precisely control and analyse while channel flow test sections suffer from hydrodynamic edge effects and require relatively high electrolyte volumes and sufficient space for a pumped flow loop. surfaces [4,18] and the importance of surface roughness [5]. Such studies, particularly in the case of electroplating of metals, were reviewed by Gabe in 1974 [6] and this early review briefly considered early corrosion studies.…”