Inhibitive Characteristics of Irvingia Gabonensis Extract on Mild Steel Corrosion in Hydrochloric Acid
Mild steel is corrosion susceptible in various environmental conditions especially in acidic medium, hence needs to be shielded from corrosive medium during industrial services. The main objective of the present research is to investigate the suitability of Irvingia gabonensis extract as an inhibitor for inhibition of mild steel corrosion in 1.5M HCl medium. The corrosion rate of the mild steel in 1.5M HCl without extract addition and the inhibitive characteristics of the Irvingia gabonensis extract were measured using weight loss technique. The extract was added to the 1.5M HCl in concentrations of 0.2, 0.5 and 1g/l. The corrosion rate was measured after immersion times of 2 h, 4 h, 6 h, 8 h, 10 h, and 12 h at temperatures of 26 and 30°C. The interaction between inhibitors and mild steel surfaces were determined using Langmuir adsorption isotherm. The weight loss measurement showed that the corrosion rate of mild steel without extract addition increased with increasing immersion time and temperature. In the presence of the extract, the corrosion rate decreased with immersion time but increased with a rise in temperature. The Irvingia gabonensis extract recorded maximum inhibition efficiency of 93.33% at 1g/l addition, an immersion time of 12 hrs and temperature of 26°C. The Langmuir adsorption isotherm plot indicated a strong adherence of the adsorption data to the assumptions confirming Langmuir adsorption isotherm. Based on the observed high inhibition efficiency, Irvingia gabonensis extract is quite suitable for effective protection of corrosion of mild steel in HCl environment.
Irvingia Gabonensis, Inhibition Efficiency, Mild Steel, Extract, Langmuir
Loto C. A. (2012) Electrode potential evaluation of effect of inhibitors on the electrochemical corrosion behaviour of mild steel reinforcement in concrete in H2SO4. J. Mater. Environ. Science, 3 (1), 195-205.
Arockiasamy P., Queen R. S. X., Thenmozhi G., Franco M., Wilson S. J. and R. Jaya S. R. (2014) Evaluation of corrosion inhibition of mild steel in 1M hydrochloric acid solution by mollugo cerviana. International Journal of Corrosion, 1-7.
Venegas R., Figueredo F., Carvallo G., Molinari A. and Vera R. (2016) Evaluation of Eulychnia acida Phil. (Cactaceae) extracts as corrosion inhibitors for carbon steel in acidic Media. Int. J. Electrochem. Science, 11, 3651-3663.
Awe I. C., Abdulrahaman A. S., Ibrahim H. K., Kareem A. G. and Adams S. M. (2015) Inhibitive performance of bitter leaf root extract on mild steel corrosion in sulphuric acid solution. American Journal of Materials Engineering and Technology, 3 (2), 35-45.
Lebe A. N., Israel O. O. and Emeka E. O. (2014) Inhibition of mild steel corrosion in hcl solution by pentaclethra macrophylla bentham extract. International Journal of Materials Engineering, 4 (5), 171-179.
Lebe N., George N., Justus N., Nneka E., Peter E. (2016) Aqueous extracts of pentaclethra macrophylla bentham roots as eco-friendly corrosion inhibition for mild steel in 0.5 M KOH Medium. International Journal of Materials and Chemistry, 6 (1), 12-18.
Elaine C. C. A. S., Beatriz A. R., Daniel P. and Eliane D. (2016) roasted coffee extracts as corrosion inhibitors for mild steel in HCl solution. Materials Research, 19 (6), 1276-1285.
Hui C., Zhenghao F., Jinling S., Wenyan S. and Qi X. (2013) Corrosion inhibition of mild steel by aloes extract in HCl solution medium. Int. J. Electrochem. Science, 8, 720-734.
Chaieb E., Bouyanzer A., Hammouti B. and Benkaddour M. (2005) Inhibition of corrosion of steel in 1M HCl by eugenol derivatives. J. Appl. Surf. Science, 246, 199-206.
Loto C. A., Loto R. T. and Popoola A. P. I. (2011) Corrosion and plants extracts inhibition of mild steel in HCl. International Journal of the Physical Sciences, 6 (15), 3616-3623.
Vinod K. P. K., Sankara M. N. P., Rexin T. G. (2010) Inhibition of mild steel corrosion in hydrochloric acid by the seed husk extract of Jatropha Curcas. J. Mater. Environ. Science, 1 (2), 119-128.
Gunasekaran G. and Chauhan L. R. (2004) Eco friendly inhibitor for corrosion inhibition of mild steel in phosphoric acid medium. Electrochimica Acta, 49 (25), 4387-4395.
Ameena M. A. (2015) Corrosion inhibition of carbon steel in hydrochloric acid solution by senna-italica extract. IJRRAS, 22 (2): 49-64.
Dudu, P. O. et al. (1998) Attractancy of diethyl ether extracts of arachis hypogaea (linnaeus) (papilionaceae), citrullus lanatus (thunberg) (cucurbitaceae) and irvingia gabonensis var. excelsa (baillon) (irvingia cea) to oryzaephilus mercator (fauvel) (coleoptera: silvanidae). Journal of Stored Products Research, 34 (4), 237-241.
Okolo C. O. et al. (1995) Analgesic effect of irvingia gabonensis stem bark extract. Journal of Ethnopharmacology, 45 (2), 125-129.
Ayuk E. T. et al. (1999) Uses, management and economic potential of irvingia gabonensis in the humid lowlands of cameroon. Forest Ecology and Management, 113 (1): 1-9.