Aluminium deposition and dissolution in aluminium chloride—n-butylpyridinium chloride melts
1987; Elsevier BV; Volume: 32; Issue: 10 Linguagem: Inglês
10.1016/0013-4686(87)85083-1
ISSN1873-3859
AutoresPK Lai, Maria Skyllas‐Kazacos,
Tópico(s)Ionic liquids properties and applications
ResumoGlassy carbon and tungsten electrodes were used to investigate the mechanism of aluminium deposition and dissolution reactions in the AlCl3—n-butylpyridinium chloride melts at ambient temperature. Chronopotentiometric results indicate that the electrodeposition of aluminium from the melt is kinetically complicated. Current reversal chronopotentiometry showed that the corrosion rate of aluminium is linearly proportional to the acidity of the melt at a given temperature. Besides impurities, the major cause of the corrosion of the deposited aluminium over a wide composition range of the melt was also found to be due to the organic butylpyridinium cation (BuPy+) serving as an electron acceptor in the corrosion process when freed from ion-pair interaction with AlCl−4.
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