Potential of Expired Ofloxacin as Corrosion Inhibitor of Mild Steel in 1m Hcl Solution

Sa'adatu Auwal Hamza, Zaharaddeen Nasiru Garba, Yusuf Saleh

Abstract


The potential of expired ofloxacin as an inhibitor of mild steel corrosion in 1 M HCl solution was investigated using gravimetric mass loss (weight loss) and electrochemical (linear polarization) methods. The investigations were carried out at temperatures of 30 and 50 ˚C and inhibitor concentrations ranging from 100 to 500 ppm. Results obtained revealed an increase in inhibition efficiency with an increase in the concentration of the inhibitor (expired ofloxacin) and a decrease in inhibition efficiency with an increase in temperature. Linear polarization study showed that this inhibitor affects the anodic site of the corrosion process, while the cathodic site remained unperturbed, thus, expired ofloxacin can be categorized as an anodic inhibitor. The adsorption process obeys Langmuir's adsorption isotherm.


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