Abstract: Inhibitive effect of eco-friendly material on stainless steel corrosion in simulated saline environment was evaluated using weight loss and potentiodynamic polarization methods. Experimental observation showed that the inhibitor performed effectively in the studied medium. The presence of inhibitor decreased the corrosion rate values, which was attributed to the preferential adsorption of residue inhibitor monomers in the inhibitor. Polarization curve measurements indicated that the inhibitor act as a mixed type inhibitor for stainless steel corrosion in chloride solution. The extent of inhibition was dependent on inhibitor concentration and exposure time. Inhibitor adsorption on stainless steel surface follows Langmuir adsorption isotherm. The applied techniques explained that egg shell is an excellent inhibitor for stainless steel (Type 316) in chloride environment. Good correlation between weight loss and potentiodynamic polarization results was observed.
Authors: O. Sanni, A.P.I. Popoola, and O.S.I. Fayomi
Keywords: Stainless steel, Saline environment, Corrosion, Inhibition