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Behavior of Al-Ga alloy on the negative side of the open – circuit potential in sodium chloride solution (CROSBI ID 578715)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Višekruna, Antonija ; Radošević, Jagoda ; Slavica Matešić, Sanja ; Krnić, Nikša Behavior of Al-Ga alloy on the negative side of the open – circuit potential in sodium chloride solution // 216th ECS Meeting Abstracts / The Electrochemical Society (ur.). Singapur : London : München : Ženeva : Tokyo : Hong Kong : Taipei : Peking : Šangaj : Tianjin : Chennai: The Electrochemical Society (ECS), 2009. str. 1934-1934

Podaci o odgovornosti

Višekruna, Antonija ; Radošević, Jagoda ; Slavica Matešić, Sanja ; Krnić, Nikša

engleski

Behavior of Al-Ga alloy on the negative side of the open – circuit potential in sodium chloride solution

The influence of the addition of small quantities gallium to high – purity aluminum (99.999 wt. %) on its electrochemical behaviour at high cathodic potentials (up to -2.0 V), in 2 M NaCl solution was investigated using the potentiostatic pulse method. After cathodic polarization, anodic current was traced vs. time in order to determine the quantity of charge necessary for oxidation of substances formed. Anodic current responses to the return to the EOCP were also recorded in the period of 1s. Time responses of the cathodic and anodic current were analyzed. The cyclic voltametry method was used to determine 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. The boundary between these two potential ranges shifts towards more negative potential values when the wt. % Ga in the alloy increases. Electrochemical methods complemented by SEM and EDAX analysis before and after the cathode pulse of -1.9 V. The results of change of potential in the negative direction with the alloy containing 0.2 wt. % Ga is superactivation of aluminum, as a consequence of a process agglomeration of high mobile atoms Ga on electrode surface.

Aluminium activation; Al-Ga alloy; cathodic polarization

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Podaci o prilogu

1934-1934.

2009.

objavljeno

Podaci o matičnoj publikaciji

216th ECS Meeting Abstracts

The Electrochemical Society

Singapur : London : München : Ženeva : Tokyo : Hong Kong : Taipei : Peking : Šangaj : Tianjin : Chennai: The Electrochemical Society (ECS)

1091-8213

Podaci o skupu

216th ECS Meeting

poster

04.09.2009-04.09.2009

Beč, Austrija

Povezanost rada

Kemijsko inženjerstvo