MODELING THE GALVANOSTATIC PULSE AND PULSE REVERSE PLATING OF NICKEL-IRON ALLOYS ON A ROTATING-DISK ELECTRODE

Citation
H. Schultz et M. Pritzker, MODELING THE GALVANOSTATIC PULSE AND PULSE REVERSE PLATING OF NICKEL-IRON ALLOYS ON A ROTATING-DISK ELECTRODE, Journal of the Electrochemical Society, 145(6), 1998, pp. 2033-2042
Citations number
54
Categorie Soggetti
Electrochemistry,"Materials Science, Coatings & Films
ISSN journal
00134651
Volume
145
Issue
6
Year of publication
1998
Pages
2033 - 2042
Database
ISI
SICI code
0013-4651(1998)145:6<2033:MTGPAP>2.0.ZU;2-K
Abstract
A model incorporating mass-transfer effects, electrode kinetics, and h omogeneous reaction is presented to describe galvanostatic pulse (PC) and pulse reverse (PR) plating of nickel-iron alloys from a sulfate ba th onto a rotating disk elec trode. It has been satisfactorily fit to experimental data taken from the literature and then used to investiga te the effects of pulse mode and pulse parameters and to compute the t ransient responses of the partial current densities and concentration profiles. A comparison of the effect of pulse mode on plating confirme d previously reported evidence that PC plating tends to produce alloys with similar iron content to those obtained by de plating, particular ly at high current. PR plating has been shown to be the most effective method of controlling iron content in the alloys. By increasing the r atio df the anodic pulse amplitude to the cathodic pulse amplitude, th e extent of anomalous codeposition and the sensitivity of alloy compos ition to the applied current can be reduced. Analysis of the transient partial current densities confirmed expert mental evidence that this improvement is due to preferential dissolution of iron during the anod ic pulses.