Evaluation of theobroma cacao pod husk extracts as corrosion inhibitor for carbon steel
Abstract
Cacao pod husks were used as raw material to obtain anti-corrosive extracts. The extraction was performed by adding 50 g of grinded husk to 300 mL of solutions of deionized water and ethanol, varying solvent concentration from 0 to 50% v/v, temperature from 28 to 50°C and extraction time from 2 to 5 hours. Then, the extracts were filtered and submitted to characterization tests. The anticorrosive activity was studied by weight loss analysis on A36 steel plates in 1M hydrochloric acid with variations of extract concentration (0, 1, 3, 7 and 10% v/v). A maximum corrosion inhibition efficiency of 91.13% was achieved with an extract concentration of 10% v/v. This extract was obtained with 16.1% v/v ethanol, at 50°C and during 5 hours of extraction time. The results proved that cacao pod husk is a suitable raw material for the production of corrosion inhibitors. Phenols were the predominant components in this extract and mainly account for its anticorrosive activity. The adsorption mechanism of the inhibitor on the metal surface was studied by Langmuir isotherm analysis and the results suggested the occurrence of a physisorption.
References
https://doi.org/10.1016/j.ejpe.2013.11.002
Abboud, Y., Abourriche, A., Ainane, T., Charrouf, M., Bennamara, A., Tanane, O. & Hammouti, B. (2009). Corrosion inhibition of carbon steel in acidic media by bifurcaria bifurcata extract. Chem. Eng. Commun., 196(7), 788-800.
https://doi.org/10.1080/00986440802589875
Abdel-Gaber, A. M., Abd-El-Nabey, B. A., Khamis, E. & Abd-El-Khalek, D. E. (2011). A natural extract as scale and corrosion inhibitor for steel surface in brine solution. Desalination, 278(1-3), 337-342.
https://doi.org/10.1016/j.desal.2011.05.048
Amri, J., Gulbrandsen, E. & Nogueira, R. P. (2008). The effect of acetic acid on the pit propagation in CO2 corrosion of carbon steel. Electrochem. Commun., 10(2), 200-203.
https://doi.org/10.1016/j.elecom.2007.11.028
Bentiss, F., Traisnel, M., Gengembre, L. & Lagrenee, M. (1999). A new triazole derivative as inhibitor of the acid corrosion of mild steel: electrochemical studies, weight loss determination, SEM and XPS. Appl. Surf. Sci., 152(3-4), 237-249.
https://doi.org/10.1016/S0169-4332(99)00322-0
Faustin, M., Maciuk, A., Salvin, P., Roos, C. & Lebrini, M. (2015). Corrosion inhibition of C38 steel by alkaloids extract of Geissospermum leave in 1 M hydrochloric acid: Electrochemical and phytochemical studies. Corros. Sci., 92: 287-300.
https://doi.org/10.1016/j.corsci.2014.12.005
Fouda, A. S., Eldesoky, A. M., Elmorsi, M. A., Fayed, T.A. & Atia, M. F. (2013). New eco-friendly corrosion inhibitors based on phenolic derivatives for protection mild steel corrosion. Int. J. Electrochem. Sci., 8: 10219-10238.
Hazwan, M., Jain, M., Razali, N., Dahon, N. & Nasshorudin, D. (2011). The effect of Tinospora crispa extracts as a natural mild steel corrosion inhibitor in 1 M HCl solution. Arab. J. Chem. In Press. doi:10.1016/j.arabjc.2011.07.002
https://doi.org/10.1016/j.arabjc.2011.07.002
Ikpi, M. E., Udoh, I. I., Okafor, P. C., Ekpe, U. J. & Ebenso, E. E. (2012). Corrosion inhibition and adsorption behavior of extracts from piper guineensis on mild steel corrosion in acid media. Int. J. Electrochem. Sci., 7: 12193-12206.
International Cocoa Organization. (2015). Quarterly bulletin of cocoa statistics, XLI (1) - Cocoa year 2014/15.
Kalaiselvi, P., Chellammal, S., Palanichamy, S. & Subramanian, G. (2010). Artemisia pallens as corrosion inhibitor for mild steel in HCl medium. Mater. Chem. Phys., 120(2-3), 643-648.
https://doi.org/10.1016/j.matchemphys.2009.12.015
Mahir, M. Abdul-Wahab, S. & Hussein, A. (2014). Corrosion inhibition of carbon steel in 1M HCl solution by Ruta graveoleons extract. J. Chem. Pharm. Res., 6(5), 996-1001.
Martinez, S. & Stern, I. (2002). Thermodynamic characterization of metal dissolution and inhibitor adsorption processes in the low carbon steel/mimosa tannin/sulfuric acid system. Appl. Surf. Sci., 199(1-4), 83-89.
https://doi.org/10.1016/S0169-4332(02)00546-9
Mourya, P., Banerjee, S. & Singh, M. M. (2014). Corrosion inhibition of mild steel in acidic solution by Tagetes erecta (Marigold flower) extract as a green inhibitor. Corros. Sci., 85: 352-363.
https://doi.org/10.1016/j.corsci.2014.04.036
Mu, G. & Li, X. (2005). Inhibition of cold rolled steel corrosion by Tween-20 in sulfuric acid: Weight loss, electrochemical and AFM approaches. J. Colloid. Interf. Sci., 289(1), 184- 192.
https://doi.org/10.1016/j.jcis.2005.03.061
Oguzie, E. E. (2006). Studies on the inhibitive effect of Occimum viridis extract on the acid corrosion of mild steel. Mat. Chem. Phys., 99(2-3), 441-446.
https://doi.org/10.1016/j.matchemphys.2005.11.018
Oguzie, E. E., Enenebeaku, C. K., Akalezi, C. O., Okoro, S. C., Ayuk, A. A. & Ejike, E. N. (2010). Adsorption and corrosion-inhibiting effect of Dacryodis edulis extract on low-carbon-steel corrosion in acidic media. J. Colloid. Interf. Sci., 349(1), 283-292.
https://doi.org/10.1016/j.jcis.2010.05.027
Rajalakshmi, R., Prithiba, A. & Leelavathi, S. (2012). An overview of emerging scenario in the frontiers of ecofriendly corrosion inhibitors of plant origin for Mild Steel. J. Chem. Acta, 1(1), 6-13.
Satapathy, A. K., Gunasekaran, G., Sahoo, S. C., Amit, K. & Rodrigues, P. V. (2009). Corrosion inhibition by Justicia gendarussa plant extract in hydrochloric acid solution. Corros. Sci., 51(12), 2848-2856.
https://doi.org/10.1016/j.corsci.2009.08.016
Umoru, L. E., Fawehinmi, I. A. & Fasasi, A. Y. (2006). Investigation of the inhibitive influence of Theobroma cacao and Cola acuminata leaves extracts on the corrosion of a mild steel in sea water. J. Appl. Sci. Res., 2(4), 200-204.
Vriesmann, L. C., Amboni, R. D. M. C. & De Oliveira, C. L. (2011). Cacao pod husks (Theobroma cacao L.): Composition and hot-water-soluble pectins. Ind. Crop. Prod., 34(1), 1173-1181.
https://doi.org/10.1016/j.indcrop.2011.04.004
Vrsalović, L., Kliškićand, M. & Gudić, S. (2009). Application of phenolic acids in the corrosion protection of Al-0.8Mg alloy in chloride solution. Int. J. Electrochem. Sci., 4: 1568-1582.
Yetri, Y., Emriadi, Jamarun, N. & Gunawarman. (2014). Corrosion inhibition efficiency of mild steel in hydrocloric acid by adding Theobroma Cacao peel extract. International Conference on Biological, Chemical and Environmental Sciences (BCES-2014), Penang, Malaysia.
Yapo, B. M., Besson, V., Koubala, B. B. & Koffi, K. L. (2013). Adding value to cacao pod husks as a potential antioxidant- dietary fiber source. Am. J. Food Nutr., 1(3), 38-46.
Yoo, S. H., Kim, Y. W., Chung, K., Baik, S. Y. & Kim, J. S. (2012). Synthesis and corrosion inhibition behavior of imidazoline derivatives based on vegetable oil. Corros. Sci., 59: 42-54.
https://doi.org/10.1016/j.corsci.2012.02.011
Zarrok, H., Oudda, H., Zarrouk, A., Salghi, R., Hammouti, B. & Bouachrine, M. (2011). Weight loss measurement and theoretical study of new pyridazine compound as corrosion inhibitor for C38 steel in hydrochloric acid solution. Der Pharma Chem., 3(6), 576-590.