caa a22 4500 477050468 CHVBK 20180405111339.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF00242197 doi (NATIONALLICENCE)springer-10.1007/BF00242197 Impedance and transient study of aluminium barrier-type oxide films [Elektronische Daten] [S. Gudić, J. Radošević, M. Kliškić] The effect of the passivation potential on the properties of the barrier films formed on high purity aluminium has been examined. The current-time responses were recorded, the charge used during formation of the barrier film was determined, and the steady-state currents were discussed. Impedance measurements provided an insight into the characteristic sizes of barrier films. Equivalent circuits which illustrate the examined aluminium/oxide film/electrolyte systems were proposed and individual circuit elements were defined. The resistance and thickness of the barrier film were shown to increase linearly with increase in the passivation potential, while increase in solution pH caused a marked decrease in the total system impedance. The paper also defines current efficiency in the formation of the barrier film. The value of ∼20% indicates that the formation of barrier films on aluminium is a process that takes place with considerable current losses. The mechanism of barrier film growth has been examined within the framework of two models suggested by different authors. Both agreements with and differences from the theories proposed have been indicated. Chapman & Hall, 1996 Gudić S. Faculty of Technology, Laboratory of Electrochemistry, Split, Croatia aut Radošević J. Faculty of Technology, Laboratory of Electrochemistry, Split, Croatia aut Kliškić M. Faculty of Technology, Laboratory of Electrochemistry, Split, Croatia aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/10(1996-10-01), 1027-1035 0021-891X 26:10<1027 1996 26 10800 https://doi.org/10.1007/BF00242197 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00242197 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gudić S. Faculty of Technology, Laboratory of Electrochemistry, Split, Croatia aut NATIONALLICENCE 700 1- Radošević J. Faculty of Technology, Laboratory of Electrochemistry, Split, Croatia aut NATIONALLICENCE 700 1- Kliškić M. Faculty of Technology, Laboratory of Electrochemistry, Split, Croatia aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/10(1996-10-01), 1027-1035 0021-891X 26:10<1027 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer