Pulse and direct current plating of Ni-W alloys from ammonia-citrate electrolyte
Само за регистроване кориснике
2006
Аутори
Obradović, MajaBosnjakov, GZ
Stevanović, Rade M.
Maksimović, Miodrag D.
Despić, Aleksandar R.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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.
Кључне речи:
nickel-tungsten alloys / ammonia-citrate electrolyte / pulse electrodepositionИзвор:
Surface and Coatings Technology, 2006, 200, 14-15, 4201-4207Издавач:
- Elsevier
DOI: 10.1016/j.surfcoat.2004.12.013
ISSN: 0257-8972
WoS: 000236363000007
Scopus: 2-s2.0-33644692884
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Obradović, Maja AU - Bosnjakov, GZ AU - Stevanović, Rade M. AU - Maksimović, Miodrag D. AU - Despić, Aleksandar R. PY - 2006 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5457 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 EP - 4207 IS - 14-15 SP - 4201 VL - 200 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", pages = "4207-4201", number = "14-15", volume = "200", 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 . .