Effect of Ga3+ and In3+ Ions on the Anodic Dissolution of Aluminum in KOH Ethanol Solutions

The anodic dissolution of aluminum in the KOH ethanol solutions is considered. It is shown that an addition of gallium and indium compounds to the 2 M KOH solution in 96% ethanol leads to an abrupt increase in the anodic dissolution current of aluminum near the open-circuit potential and its shift b...

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Bibliographic Details
Published in:Russian journal of electrochemistry 2023-02, Vol.59 (2), p.162-167
Main Authors: Rybalka, K. V., Beketaeva, L. A.
Format: Article
Language:English
Subjects:
Additives
Aluminum
Anodic dissolution
Chemistry
Chemistry and Materials Science
Circuits
Discharge
Dissolution
Electrochemistry
Ethanol
Gallium
Hydrogen evolution
Indium compounds
Open circuit voltage
Physical Chemistry
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Summary:The anodic dissolution of aluminum in the KOH ethanol solutions is considered. It is shown that an addition of gallium and indium compounds to the 2 M KOH solution in 96% ethanol leads to an abrupt increase in the anodic dissolution current of aluminum near the open-circuit potential and its shift by 300 mV toward negative values. The discharge galvanostatic curves in the solutions with the additives of gallium and indium compounds contain a flat discharge plateau at the current densities up to 4 mA/cm 2 . The hydrogen evolution rate in a number of KOH ethanol solutions is measured.
ISSN:1023-1935
1608-3342
DOI:10.1134/S102319352302009X