Analysis of inhibition action of acacia nilotica ethanol extract on aluminium corrosion in 1.0M HCl and NaOH

Abdul S.U,Ibrahim M A,Ibrahim M.B

doi:10.14419/ijac.v9i2.31566

Abdul S.U, Ibrahim M A + Show 1 more

Open Access

https://doi.org/10.14419/ijac.v9i2.31566

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Abstract

The proposed corrosion inhibition action of Acacia nilotica ethanol extract on aluminium corrosion in HCl and NaOH was investigated using weight loss method. The Acacia nilotica ethanol extract was found to be inactive in NaOH at all the concentrations of the inhibitor but active in HCl with increasing inhibition efficiency as inhibitor concentration and decreases as temperature increases with the highest inhibition efficiency of 95.31%. The kinetic and thermodynamics data shows that the adsorption process was feasible and endothermic adsorption process from the large negative values of Gibbâ€™s free energy (Î”G) and negative values of enthalpy (Î”H), The data indicated physisorption process of adsorption which was supported by FTIR spectra. The adsorption process was best fitted to Langmuir adsorption model.Â Â

Highlights

The term metal corrosion is defined as the interaction of a metal with the surrounding envirounment, causing a slow, steady and irreversible deterioration of metal, in both physical and chemical properties (Rafael et al, 2014)
Weight loss method: The weight aluminum coupons were separately immersed in the 100cm[3] opened beakers containing the test solution of a given concentration with and without a given concentration of the inhibitor at a particular temperature maintained in a thermostated water bath
Effect of inhibitor concentration: The effect of inhibitor concentration on weight loss, corrosion rate, surface coverage and inhibition efficiency was investigated at 298K and the results were presented in table 3

Summary

Introduction

The term metal corrosion is defined as the interaction of a metal with the surrounding envirounment, causing a slow, steady and irreversible deterioration of metal, in both physical and chemical properties (Rafael et al, 2014). It is the destruction of materials resulting from exposure and interaction with the corrosive envirounment. As the alternative of toxic corrosion inhibitors and environmental friendly, plant extracts are receiving more attentions as better corrosion inhibitor (El-etre, 2007; Okafor et al, 2008) With regard to these findings, the current research investigated the corrosion inhibitive activity of Acacia nilotica fruits ethanol extract on the corrosion of aluminium in acidic and alkaline media

Materials and Methods

Result and discussion

Findings

Conclusion