A contribution to the knowledge of electrochemical deposition of W induced by Ni
Само за регистроване кориснике
2000
Чланак у часопису (Објављена верзија)
,
Elsevier
Метаподаци
Приказ свих података о документуАпстракт
It was found that codeposition of Ni and W from an ammonia and citrate-containing electrolyte, is very sensitive to changes in operating conditions. The Ni-W alloy deposit exhibited sensitivity of chemical composition and phase structure on the composition of the electrolyte, pH in particular, as well as on the c.d., hydrodynamic conditions and quantity (thickness) of the deposit.
Thus, small changes in pH, which arise during the process of bath utilization, are found to change the relationships between peaks in anodic dissolution voltammograms reflecting existence of different phases.
The anodic linear sweep voltammograms (ALSV) of the alloys deposited at medium c.d.'s, pH lower than 8.4 and a high rate of rotation of the RDE contained two peaks. The first one could be ascribed to some tungsten oxide species while the appearance of the second one basically reflects the presence of solid solution of W in Ni, but also points to some other phases.
The increase in pH, increase in c....d., and the decrease in the rate of rotation of the RDE all lead to ALSV with a single peak with a peak potential shifted in the negative direction i.e. towards the dissolution peak of pure Ni. Analysis confirmed a decrease of W content in that shift. Still a somewhat more noble behavior than that of Ni points out that some W still remains in Ni.
Кључне речи:
nickel-tungsten / induced codeposition / phase structureИзвор:
Journal of Electroanalytical Chemistry, 2000, 491, 188-196Издавач:
- Elsevier Sequoia SA
Финансирање / пројекти:
- Ministry of Science, Technology and Development of the Republic of Serbia
Институција/група
IHTMTY - JOUR AU - Obradović, Maja D. AU - Stevanović, Jasmina AU - Stevanović, Rade M. AU - Despić, Aleksandar R. PY - 2000 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/6343 AB - It was found that codeposition of Ni and W from an ammonia and citrate-containing electrolyte, is very sensitive to changes in operating conditions. The Ni-W alloy deposit exhibited sensitivity of chemical composition and phase structure on the composition of the electrolyte, pH in particular, as well as on the c.d., hydrodynamic conditions and quantity (thickness) of the deposit. Thus, small changes in pH, which arise during the process of bath utilization, are found to change the relationships between peaks in anodic dissolution voltammograms reflecting existence of different phases. The anodic linear sweep voltammograms (ALSV) of the alloys deposited at medium c.d.'s, pH lower than 8.4 and a high rate of rotation of the RDE contained two peaks. The first one could be ascribed to some tungsten oxide species while the appearance of the second one basically reflects the presence of solid solution of W in Ni, but also points to some other phases. The increase in pH, increase in c.d., and the decrease in the rate of rotation of the RDE all lead to ALSV with a single peak with a peak potential shifted in the negative direction i.e. towards the dissolution peak of pure Ni. Analysis confirmed a decrease of W content in that shift. Still a somewhat more noble behavior than that of Ni points out that some W still remains in Ni. PB - Elsevier Sequoia SA T2 - Journal of Electroanalytical Chemistry T1 - A contribution to the knowledge of electrochemical deposition of W induced by Ni VL - 491 SP - 188 EP - 196 DO - 10.1016/S0022-0728(00)00282-5 ER -
@article{ author = "Obradović, Maja D. and Stevanović, Jasmina and Stevanović, Rade M. and Despić, Aleksandar R.", year = "2000", abstract = "It was found that codeposition of Ni and W from an ammonia and citrate-containing electrolyte, is very sensitive to changes in operating conditions. The Ni-W alloy deposit exhibited sensitivity of chemical composition and phase structure on the composition of the electrolyte, pH in particular, as well as on the c.d., hydrodynamic conditions and quantity (thickness) of the deposit. Thus, small changes in pH, which arise during the process of bath utilization, are found to change the relationships between peaks in anodic dissolution voltammograms reflecting existence of different phases. The anodic linear sweep voltammograms (ALSV) of the alloys deposited at medium c.d.'s, pH lower than 8.4 and a high rate of rotation of the RDE contained two peaks. The first one could be ascribed to some tungsten oxide species while the appearance of the second one basically reflects the presence of solid solution of W in Ni, but also points to some other phases. The increase in pH, increase in c.d., and the decrease in the rate of rotation of the RDE all lead to ALSV with a single peak with a peak potential shifted in the negative direction i.e. towards the dissolution peak of pure Ni. Analysis confirmed a decrease of W content in that shift. Still a somewhat more noble behavior than that of Ni points out that some W still remains in Ni.", publisher = "Elsevier Sequoia SA", journal = "Journal of Electroanalytical Chemistry", title = "A contribution to the knowledge of electrochemical deposition of W induced by Ni", volume = "491", pages = "188-196", doi = "10.1016/S0022-0728(00)00282-5" }
Obradović, M. D., Stevanović, J., Stevanović, R. M.,& Despić, A. R.. (2000). A contribution to the knowledge of electrochemical deposition of W induced by Ni. in Journal of Electroanalytical Chemistry Elsevier Sequoia SA., 491, 188-196. https://doi.org/10.1016/S0022-0728(00)00282-5
Obradović MD, Stevanović J, Stevanović RM, Despić AR. A contribution to the knowledge of electrochemical deposition of W induced by Ni. in Journal of Electroanalytical Chemistry. 2000;491:188-196. doi:10.1016/S0022-0728(00)00282-5 .
Obradović, Maja D., Stevanović, Jasmina, Stevanović, Rade M., Despić, Aleksandar R., "A contribution to the knowledge of electrochemical deposition of W induced by Ni" in Journal of Electroanalytical Chemistry, 491 (2000):188-196, https://doi.org/10.1016/S0022-0728(00)00282-5 . .