Abstract
The corrosion inhibition of mild steel by miconazole nitrate, an antifungal drug has been investigated using potentiodynamic polarization, electrochemical impedance spectroscopy technique, and weight loss methods. The experimental results suggested miconazole nitrate is a good corrosion inhibitor for mild steel in 1 M hydrochloric acid medium. The inhibition efficiency increased with increase in inhibitor concentration. The thermodynamic parameters were determined and discussed. The inhibition was assumed to occur via adsorption of the inhibitor molecule on the surface of mild steel following Langmuir adsorption isotherm.
Highlights
The corrosion of metals has received prime attention of material scientists and chemists since it has many serious adverse effects including economic, health, safety, technological, and cultural consequences
Weight loss measurements were performed on mild steel coupons with dimensions 1 × 0.3 × 0.06 inches, immersed in 100 mL flask, containing 50 mL of 1 M hydrochloric acid solution with different concentrations of the inhibitor
The slight increase in the inhibition efficiency for corrosion of mild steel at higher temperature can be attributed to the occurrence of chemical adsorption of the inhibitor molecules on its surface
Summary
The corrosion of metals has received prime attention of material scientists and chemists since it has many serious adverse effects including economic, health, safety, technological, and cultural consequences. The use of specific chemical compound as an inhibitor is the best, simple, and practical method to minimize corrosion of metals. Many heterocyclic compounds containing hetero atoms like N, O, and S have been proved to be effective inhibitors for corrosion of metals in acidic media [1,2,3,4,5,6,7,8,9,10,11]. Perusals of several literatures reveal that there is no information regarding the use of miconazole nitrate as corrosion inhibitor for mild steel. The aim of the present investigation is to study the effect of miconazole nitrate as a potential inhibitor for mild steel in 1 M HCl
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