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Influence of alkali metal hydroxides on the reaction of aluminum monocrystals

I. Halaša and M. Miadoková

Department of Physical Chemistry, Faculty of Natural Sciences, Comenius University, CS-842 15 Bratislava


Abstract: The influence of alkaline medium on kinetic behaviour and potential of aluminium monocrystal was investigated in consideration of surface orientation of the aluminium samples. It has been found that the cation present in the hydroxide solution plays the decisive part in aggressiveness of the used hydroxide. In the medium of NaOH and KOH the kinetic and electrochemical anisotropy of the basal oriented sections {100}, {110}, and {111} of the monocrystal was observed. The different reactivity of individual samples is considered to be due to different electron affinity as well as to different density of surface atoms.

Full paper in Portable Document Format: 444a543.pdf


Chemical Papers 44 (4) 543–555 (1990)

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