Inhibitive effects of hydrochlorothiazoide on the corrosion of aluminum 7075 in 0.1 M HCl and its adsorption characteristics

الملخص EN

The corrosion inhibition effects and adsorption of 6-Chloro-3,4-dihydro-2H-1,2,4-benzothiadiazine -7- sulfo amide 1,1-dioxid [ Hydrochlorothiazoide (HYD) drug] on aluminum 7075 in 0.1 M HCl solution at 35 and 55 °C were investigated using weight loss measurements .

It was found that the inhibition efficiency increased with the increase in HYD concentration .The temperature studies revealed an increase in the corrosion rate with an increase in temperature in the absence and the presence of the inhibitor .The thermodynamic parameters Ea , Qads and Kads have been calculated .

A mechanism of physical adsorption of HYD on the aluminum surface is proposed.

The adsorption characteristics of inhibitor were approximated by Langmuir isotherm.

The reactivity of the inhibitor was analyzed through quantum chemical calculations based on DFT methods at the B3YLP and 6-311++G (d ,p) basis set