Kinetics and Thermodynamics of Aluminium Corrosion Inhibition by Anthocleista Djalonensis Leaf Extract in Hydrochloric Acid Solution

Author(s): N. J. Nnaji, N. O. Obi-Egbedi and M. A. Nnabugwu

Adsorption of anthocleista djalonensis leaf extract on aluminum in hydrochloric acid solution was studied at 30°C and 60°C using gravimetric technique. Increasing the concentration (v/v %) of anthocleista djalonensis leaf extract was observed to increase its corrosion inhibition efficiency. Temperature studies revealed an increase in inhibition efficiency with rise in temperature. Comparative analysis of kinetic and thermodynamic parameters revealed effective inhibition. This paper demonstrates the use of two statistical approaches – Analysis of variance (ANOVA) and Duncan multiple range test, in the determination of the performance of various linearised Langmuir equations.

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