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Title of Journal: J Appl Electrochem

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Abbravation: Journal of Applied Electrochemistry

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Springer Netherlands

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DOI

10.1007/s007060200014

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1572-8838

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Behaviour of Al–Ga alloy during cathodic polarizat

Authors: A Višekruna J Radošević S Slavica Matešić N Krnić
Publish Date: 2009/12/10
Volume: 40, Issue: 3, Pages: 621-630
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Abstract

The effect of the addition of small quantities of gallium to highpurity aluminium 99999 wt on its electrochemical behaviour at high cathodic potentials up to −20 V versus SCE has been investigated using the potentiostatic pulse method After cathodic polarization anodic current was traced versus time to determine the quantity of charge necessary for oxidation of substances formed Anodic current responses to the return to the E OCP were also recorded in the period of 1 s Time responses of the cathodic and anodic currents were analyzed The cyclic voltammetry method was used to determine the hydration potential The range of low and high cathodic potentials LCP HCP was defined for all the samples It has been established that the oxide film retains its properties in the LCP range while in the HCP range cathodic breakdown and hydration of the oxide take place Electrochemical methods complemented the SEM and EDAX analysis before and after the cathode pulse of −19 V versus SCE

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