The effect of the potential of deposition and electrode rotation rate on current efficiency and partial current density of nickel deposition from ammonia-citrate electrolyte with and without tungstate ions was investigated. In addition, the effect of pulse deposition parameters, such as frequency and ratio between pause and deposition time, t(p)/t(c), oil current efficiency and composition of Ni-W alloys was investigated. Partial current densities of tungsten and nickel deposition were calculated from experimental results and compared with those in direct current (dc) deposition at the same average current density, as well as with those calculated using theoretical equations for the pulse current (pc) deposition process controlled by mass transport. Obtained partial current densities of tungsten are in fair agreement with those predicted by theory in both cases, as a function of dimensionless pulse period and as a function of the t(p)/t(c) ratio. That confirms that the tungsten deposit...ion process is controlled by mass transport. Dependences of the partial current densities of nickel deposition on the rotation rate as well as on the pc variables (frequency and pause to pulse ratio) were attributed to changes in surface concentration of ammonia and the pH.
TY - JOUR
AU - Obradović, Maja
AU - Bosnjakov, GZ
AU - Stevanović, Rade M.
AU - Maksimović, Miodrag D.
AU - Despić, Aleksandar R.
PY - 2006
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/226
AB - The effect of the potential of deposition and electrode rotation rate on current efficiency and partial current density of nickel deposition from ammonia-citrate electrolyte with and without tungstate ions was investigated. In addition, the effect of pulse deposition parameters, such as frequency and ratio between pause and deposition time, t(p)/t(c), oil current efficiency and composition of Ni-W alloys was investigated. Partial current densities of tungsten and nickel deposition were calculated from experimental results and compared with those in direct current (dc) deposition at the same average current density, as well as with those calculated using theoretical equations for the pulse current (pc) deposition process controlled by mass transport. Obtained partial current densities of tungsten are in fair agreement with those predicted by theory in both cases, as a function of dimensionless pulse period and as a function of the t(p)/t(c) ratio. That confirms that the tungsten deposition process is controlled by mass transport. Dependences of the partial current densities of nickel deposition on the rotation rate as well as on the pc variables (frequency and pause to pulse ratio) were attributed to changes in surface concentration of ammonia and the pH.
PB - Elsevier
T2 - Surface and Coatings Technology
T1 - Pulse and direct current plating of Ni-W alloys from ammonia-citrate electrolyte
VL - 200
IS - 14-15
SP - 4201
EP - 4207
DO - 10.1016/j.surfcoat.2004.12.013
ER -
@article{
author = "Obradović, Maja and Bosnjakov, GZ and Stevanović, Rade M. and Maksimović, Miodrag D. and Despić, Aleksandar R.",
year = "2006",
abstract = "The effect of the potential of deposition and electrode rotation rate on current efficiency and partial current density of nickel deposition from ammonia-citrate electrolyte with and without tungstate ions was investigated. In addition, the effect of pulse deposition parameters, such as frequency and ratio between pause and deposition time, t(p)/t(c), oil current efficiency and composition of Ni-W alloys was investigated. Partial current densities of tungsten and nickel deposition were calculated from experimental results and compared with those in direct current (dc) deposition at the same average current density, as well as with those calculated using theoretical equations for the pulse current (pc) deposition process controlled by mass transport. Obtained partial current densities of tungsten are in fair agreement with those predicted by theory in both cases, as a function of dimensionless pulse period and as a function of the t(p)/t(c) ratio. That confirms that the tungsten deposition process is controlled by mass transport. Dependences of the partial current densities of nickel deposition on the rotation rate as well as on the pc variables (frequency and pause to pulse ratio) were attributed to changes in surface concentration of ammonia and the pH.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "Pulse and direct current plating of Ni-W alloys from ammonia-citrate electrolyte",
volume = "200",
number = "14-15",
pages = "4201-4207",
doi = "10.1016/j.surfcoat.2004.12.013"
}
Obradović, M., Bosnjakov, G., Stevanović, R. M., Maksimović, M. D.,& Despić, A. R.. (2006). Pulse and direct current plating of Ni-W alloys from ammonia-citrate electrolyte. in Surface and Coatings Technology
Elsevier., 200(14-15), 4201-4207.
https://doi.org/10.1016/j.surfcoat.2004.12.013
Obradović M, Bosnjakov G, Stevanović RM, Maksimović MD, Despić AR. Pulse and direct current plating of Ni-W alloys from ammonia-citrate electrolyte. in Surface and Coatings Technology. 2006;200(14-15):4201-4207.
doi:10.1016/j.surfcoat.2004.12.013 .
Obradović, Maja, Bosnjakov, GZ, Stevanović, Rade M., Maksimović, Miodrag D., Despić, Aleksandar R., "Pulse and direct current plating of Ni-W alloys from ammonia-citrate electrolyte" in Surface and Coatings Technology, 200, no. 14-15 (2006):4201-4207,
https://doi.org/10.1016/j.surfcoat.2004.12.013 . .
