Note on the electrodeposits obtained at the limiting current

Influence of electrode material and roughness on iron electrodeposits dispersion by ultrasonification

“…When the diffusion layer thickness ($14 mm here) is greater than the height of the stripes (2 mm here, macroprofile), due to local variations of the diffusion layer thickness, metal should be preferentially deposited at the top of the stripes [41]. We cannot explain this observation at this time.…”

“…Among other effects, this could be attributed to the electrodeposition mode and the cathodic current employed; with voltammetry, electrodeposition is conducted under continuous evolution of the applied voltage and the resulting current (which reached its limiting value), while galvanostatic electrolyses carried out with a current close (90%) to the limiting current. As often observed in galvanostatic electrodeposition, electrodeposit tends to be dendritic/powdery when applied current is equal to, or higher than the limiting current ( [40][41][42]). Even when the applied current is just below the limiting current, a 'less rough' and 'less dendritic' electrodeposit morphology could be obtained [41,42].…”

“…As often observed in galvanostatic electrodeposition, electrodeposit tends to be dendritic/powdery when applied current is equal to, or higher than the limiting current ( [40][41][42]). Even when the applied current is just below the limiting current, a 'less rough' and 'less dendritic' electrodeposit morphology could be obtained [41,42].…”

The Effect of Ionic Migration and Diffusion on the Roughness Development of Growing Electrodeposits. The Use of Fractals to Compare Theory With Experimental Results

“…Quantifying surface properties, in particular roughness, has been investigated in some detail, using a variety of methods [3,5,6, 7J. There are some fundamental problems associated with these methods [4J and in most cases the measure of surface roughness depends on the method used to obtain that measure and the scale at which the investigation is conducted.…”

Electroplating of Horizontal Steel Cylinders in Unstirred Copper Sulphate Solutions

“…Many metals are deposit in a very rough or powdery form 2 , when electroplating is carried out at the limiting current density. The possibility of preventing powder formation at the limiting current by means of a suitable additive of great interest and represent a significant activity in electroplating 3 .…”