(Scientific Research Publishing Inc., 2016-08) Philip, Joseph Yoeza Naimani; Buchweshaija, Joseph; Mwakalesi, Alinanuswe J.
In this study, corrosion inhibiting properties of amino pentadecylphenols (APPs) derived from
Cashew Nut Shell Liquid (CNSL) on mild steel in aerated 0.10 M HCl at 303 K were studied using
Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarization measurements.
Both methods indicated the potential of a mixture of amino pentadecyphenols to serve as a corro-
sion inhibitor in mild steel in 0.10 M HCl. Corrosion inhibition efficiencies were observed to in-
crease with increase in the inhibitor concentration, with maximum corrosion inhibition of about
98% at inhibitor concentration of 600 ppm. The adsorption of the inhibitor on mild steel surface
was found to obey Temkin adsorption isotherm, signifying physical adsorption of the inhibitor
molecules on mild steel surface.