Pretražite po imenu i prezimenu autora, mentora, urednika, prevoditelja

Napredna pretraga

Pregled bibliografske jedinice broj: 2593

Impedance of anodically passivated Fe80B20 glassy alloy in solutions of various pH


Horvat-Radošević, Višnja; Kvastek, Krešimir
Impedance of anodically passivated Fe80B20 glassy alloy in solutions of various pH // Electrochimica acta, 42 (1997), 9; 1403-1419 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 2593 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Impedance of anodically passivated Fe80B20 glassy alloy in solutions of various pH

Autori
Horvat-Radošević, Višnja ; Kvastek, Krešimir

Izvornik
Electrochimica acta (0013-4686) 42 (1997), 9; 1403-1419

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Glassy alloy Fe80B20; Fe-based anodic oxide films; passive films; impedance

Sažetak
Anodic passive films grown on the glassy alloy Fe80B20 under strongly controlled conditions are characterized by an impedance technique in solutions of different pH (7.4-12.1) and potentials covering passive and begining of the oxygen evolution reaction (OER) regions. Modellizations of the passive film/solution (F/S) interface region is proposed on the basis of shapes of Bode plots and Mott-Schottky dependences. Semiconductor behaviour due to the oxygen nonstoichiometry with Nernstian pH dependence is obtained over almost the whole passive potential region. Passive current densities independent of the electrolyte pH indicate that the corrosion current is determined by a pH independent electric field strength within the space-charge layer. At higher anodic potentials and higher electrolyte pH, due to the surface deprotonation reaction, there is an increased density of basic (MOH^-) surface groups acting as surface states, and reactants in the first step of OER. Further increase in anodic potential facilitates surface oxidation of (MOH^-) to (MOH^o). In the OER potential region, the passivated Fe80B20 electrode acts as a classical oxygen electrode. Comparison of the data with those obtained on the pure Fe passivated under the same conditions, shows the detrimental effect of B on either the corrosion properties of the passive film in the passive potential region, or on the parameters of OER.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekti:
00981507

Ustanove:
Institut "Ruđer Bošković", Zagreb

Citiraj ovu publikaciju

Horvat-Radošević, Višnja; Kvastek, Krešimir
Impedance of anodically passivated Fe80B20 glassy alloy in solutions of various pH // Electrochimica acta, 42 (1997), 9; 1403-1419 (međunarodna recenzija, članak, znanstveni)
Horvat-Radošević, V. & Kvastek, K. (1997) Impedance of anodically passivated Fe80B20 glassy alloy in solutions of various pH. Electrochimica acta, 42 (9), 1403-1419.
@article{article, year = {1997}, pages = {1403-1419}, keywords = {Glassy alloy Fe80B20, Fe-based anodic oxide films, passive films, impedance}, journal = {Electrochimica acta}, volume = {42}, number = {9}, issn = {0013-4686}, title = {Impedance of anodically passivated Fe80B20 glassy alloy in solutions of various pH}, keyword = {Glassy alloy Fe80B20, Fe-based anodic oxide films, passive films, impedance} }
@article{article, year = {1997}, pages = {1403-1419}, keywords = {}, journal = {Electrochimica acta}, volume = {42}, number = {9}, issn = {0013-4686}, keyword = {} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus





Contrast
Increase Font
Decrease Font
Dyslexic Font