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
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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nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
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