Kinetics Study on Mild Steel Corrosion Inhibition by Ethyl Ester of Rubber Seed Oil
1Offurum, J.C.; 2Nwakaudu, M.S.; 2Ndukwe O.C. and 2Kamalu C.I.O.
1Department of Chemical Engineering, Imo State Polytechnic, Umuagwo-Ohaji
2Department of Chemical Engineering, Federal University of Technology, Owerri
E-mail: jullyengine@yahoo.com
ABSTRACT
The Kinetics of Mild steel Corrosion Inhibition by Ethyl Ester of Rubber Seed Oil was studied. This was motivated by the view of assessing the effects of kinetic energy on the corrosion and corrosion inhibition processes. Corrosion inhibition assessment was conducted using weight loss analysis at 40oC, at varying times (of 4, 8, 16, 24 and 32hours) and dozing rates (of 50%, 60% and 70% Strokes). The first-order kinetic rate constant (k1) was found to be positive at all reaction conditions, indicating the continuous need for kinetic energy during the corrosion reaction. The time taken for the loaded inhibitor sample to be absorbed by the material by half (the half life), t1/2 was observed to be higher at blank conditions than when inhibitor is present, at the various dozing rates; this indicates that adsorption of the corrosion medium by the material is higher in blank solution, thereby making the steel pipe more susceptible to corrosion effects in the absence of inhibitor. However, the values of coefficient of determination (R2), at the various cases, range from 0.6611-0.9889, indicating a good fit of the data points.
Keywords: Kinetics, Mild steel, Corrosion Inhibition, Rubber Seed Oil
