Collect. Czech. Chem. Commun. 1990, 55, 2662-2668

Study of the influence of tetraalkylammonium salts on the dissolution of aluminium in aqueous NaOH solutions

Milica Miadoková, Ivan Halaša and Martin Koreň

Department of Physical Chemistry, Comenius University, 842 15 Bratislava


Tetraalkylammonium halides decelerate the reaction of aluminium in aqueous NaOH solutions. Their effect depends on the alkyl group, on the anion, and on their concentration; and it is additive with the effect of Ca2+ ions. The inhibition effects under study and the shift of the stationary potentials to more anodic values are shown to be related with the influence on the cathodic process, resulting in a retardation of the whole corrosion process.