الفهرس 
Introduction
Experimental techniqesOnly 14 pages are availabe for public view
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Abstract
The present work is assigned to study the corrosion behaviour of aluminium 6063 in 0.5M phosphoric acid solution and the inhibiting effect of some pharmaceutical compounds. The obtained results showed that the inhibition efficiency of these compounds increased by increasing their concentration and decreased by raising the temperature, so that the adsorption of these compounds is physical adsorption and the adsorption of the first group of the used pharmaceutical compounds on the aluminum 6063 surface in 0.5 M H3PO4 follows Frumkin<U+2019>s adsorption isotherm while the the adsorption of the second group of the used pharmaceutical compounds on the aluminum 6063 surface in 0.5 M H3PO4 follows Temkin?s. The inhibition efficiencies (% IE) also increased by addition of KI, KBr and KCl in 0.5 M H3PO4 due to synergism effect. Some thermodynamic parameters are computed and discussed. Galvanostatic polarization technique was used as a second method to study the inhibiting effect of the used pharmaceutical compounds. The influence of chemical structure of these pharmaceutical compounds on their inhibition efficiencies was discussed.