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

Abstract

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.