ISSN : 0970 - 020X, ONLINE ISSN : 2231-5039
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Abstract

Study of Inhibition and Adsorption Properties of Mild Steel Corrosion by Expired Pharmaceutical Gentamicin Drug in Hydrochloric Acid Media

A. Srinivasuluand P. K. Kasthuri2

DOI : http://dx.doi.org/10.13005/ojc/330559


Abstract:

This experiment promotes economically, eco-friendly benefitted inhibitor and also avoids pollution and recycles the drugs. In this experiment expired Gentamicin drug was tested its inhibitive effect in 1 M HCl acid medium on mild steel, with the electrochemical and weight loss techniques. The Various parameters were calculated such as inhibition efficiency, corrosion rate and surface coverage. The inhibition efficiency shows increases when inhibitor concentration, immersion period and temperature increase in weight loss method. Obtained results in electrochemical Impedance and weight loss studies are very much excellent agreement with each other. Thermodynamic parameter free energy value was negative, it shows spontaneous adsorption of inhibitor on the surface of the mild steel. The adsorption nature on the surface of mild steel was under conformity by Langmuir adsorption isotherm. The surface morphology, with and without inhibitor was studied with using scanning electron microscopy.

Keywords:

Mild steel, acidic medium; economically benefitted corrosion inhibitor; expired-drug; electrochemical Impedance and weight loss methods; the mild steel surface morphology

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