Acyclovir (ACV) and Omeprazole (OMP) are two expired drugs examined as an inhibitors for the
dissolution of Sabic iron in 1.0 M HCl using weight loss, electrochemical impedance and two types of
polarization; galvanostatic and potentiodynamic measurements . Increase the concentration of expired
ACV and OMP increases the efficacy of inhibition that also decreases with temperature. These drugs
acts as mixed inhibitors that was detected by galvanostatic polarization studies. The inhibition activity
of ACV and OMP owing to its horizontal adsorption of them on the Sabic iron surface because of the
presence of several active centers. The adsorption follows Langmuir isotherm. The impedance data
demonstrated one capacitive loop suggesting that the charge transfer control the corrosion reaction. The
expired ACV and OMP performed as an efficient pitting corrosion inhibitor by moving the pitting
potential to more noble values. |
