Naslov
Behaviour of Al-Sn Alloys on the Negative Side of the Open-Circuit Potential

Autori
Kliškić, Maja ; Radošević, Jagoda ; Aljinović, Ljiljana

Izvornik
Journal of Applied Electrochemistry (0021-891X) 24 (1994), 8; 814-818

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

Ključne riječi
Al-Sn alloy; alloy activation; cyclic voltammetry; potentiostatic trasient

Sažetak
The influence of the addition of small quantities of tin to high-purity aluminum (99.999%) on its electrochemical behaviour at high cathodic potentials was investigated. Cathodic current-time transients were recorded on Al-Sn alloys immersed in neutral 2M NaCl, when subjected to a potential pulse from a potential around the open-circuit potential to different negative values. Hydration of the oxide layer occurs at potentials more negative than - 1600 mV vs SCE (for alloy with 0.02% and 0.09% Sn), -1750 mV (Al-0.2% Sn) and - 1900 mV (Al-0.4%Sn), whereupon hydrogen is evolved at the metal-hydrated oxide interface. Anodic current responses to the return of the potential to the rest values were also recorded, and the charges required for oxidation of the substances created during the cathodic processes are discussed.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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