Corrosion Inhibition of Aluminum in Sodium Hydroxide Solutions by Some Thiazole Derivatives

Abstract

Two organic inhibitors namely 2-amino[4-p-Bromophenyl]Thiazole
(ABT) and 2-amino[4-p-Hydroxyphenyl]Thiazole (AHT) were synthesized. FTIR and NMR studies were done in order to confirm the composition of the
synthesized inhibitors. These compounds were evaluated as inhibitors for
Aluminum in (0.02M) NaOH solutions by weight loss and potentiodynamic
polarization techniques. Different concentrations of inhibitors, temperatures, and
immersion time have been tested. Values of inhibition efficiency obtained from
the two methods are in good agreement and are dependent upon the
concentration of inhibitor. The results observed have been discussed in the light
of the molecular structures of the compounds and their adsorption on the surface
of the corroding meta