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Electrochemical Passivation of Niobium in KOH Solutions

Irena Mickova
Abdurauf Prusi
Toma Grcev
Ljubomir Arsov

Puni tekst: engleski, pdf (103 KB) str. 527-532 preuzimanja: 1.156* citiraj
APA 6th Edition
Mickova, I., Prusi, A., Grcev, T. i Arsov, Lj. (2006). Electrochemical Passivation of Niobium in KOH Solutions. Croatica Chemica Acta, 79 (4), 527-532. Preuzeto s https://hrcak.srce.hr/5758
MLA 8th Edition
Mickova, Irena, et al. "Electrochemical Passivation of Niobium in KOH Solutions." Croatica Chemica Acta, vol. 79, br. 4, 2006, str. 527-532. https://hrcak.srce.hr/5758. Citirano 14.12.2019.
Chicago 17th Edition
Mickova, Irena, Abdurauf Prusi, Toma Grcev i Ljubomir Arsov. "Electrochemical Passivation of Niobium in KOH Solutions." Croatica Chemica Acta 79, br. 4 (2006): 527-532. https://hrcak.srce.hr/5758
Harvard
Mickova, I., et al. (2006). 'Electrochemical Passivation of Niobium in KOH Solutions', Croatica Chemica Acta, 79(4), str. 527-532. Preuzeto s: https://hrcak.srce.hr/5758 (Datum pristupa: 14.12.2019.)
Vancouver
Mickova I, Prusi A, Grcev T, Arsov Lj. Electrochemical Passivation of Niobium in KOH Solutions. Croatica Chemica Acta [Internet]. 2006 [pristupljeno 14.12.2019.];79(4):527-532. Dostupno na: https://hrcak.srce.hr/5758
IEEE
I. Mickova, A. Prusi, T. Grcev i Lj. Arsov, "Electrochemical Passivation of Niobium in KOH Solutions", Croatica Chemica Acta, vol.79, br. 4, str. 527-532, 2006. [Online]. Dostupno na: https://hrcak.srce.hr/5758. [Citirano: 14.12.2019.]

Sažetak
Electrochemical formation and dissolution of passive films on niobium surfaces were studied in various concentrations of KOH solutions using the open-circuit potential and potentiodynamic techniques. Potentiodynamic I/E profiles indicated that the electrolyte concentration strongly affects the active/passive transition, as well as the values of the passivation potentials and critical currents. At higher KOH solution concentrations, after passivation of the electrode surface in the first positive cyclic voltammetry scan, reactivation processes were monitored in the reverse scan. Formation of passive films is a diffusion-controlled process only for higher sweep rates. Cathodic pretreatment of niobium electrode affects the chemical structure and oxide composition of passive films. Corrosion measurements have shown that at higher KOH concentrations the passive film is rapidly attacked and the corrosion resistance of Nb electrode is drastically diminished.

Ključne riječi
niobium electrode; passive films; open circuit potential; potentiodynamic data

Hrčak ID: 5758

URI
https://hrcak.srce.hr/5758

Posjeta: 1.466 *