Alkaloid and Non Alkaloid Extracts of Solanum melongena Leaves as Green Corrosion Inhibitors on Carbon Steel in Alkaline Medium

B. U. Ugi

doi:10.53704/fujnas.v3i1.60

Authors

B. U. Ugi Department of Pure and Applied Chemistry, University of Calabar, P.M.B. 1115 Calabar, Nigeria

DOI:

https://doi.org/10.53704/fujnas.v3i1.60

Abstract

The corrosion and inhibition behavior of Carbon steel (CS) in high alkaline solution [Sodium trioxocarbonate (IV)] in the presence of alkaloid and non alkaloid extracts of Solanum melongena leaves have been studied using conventional methods - mass loss and gasometric techniques. The results indicate that the extracts inhibit the corrosion of Carbon steel. However, the Alkaloid extract of Solanum melongena leaves (AESML) exhibits higher maximum inhibition efficiency of 81.1% than Non alkaloid extract of Solanum melongena leaves [NAESML] (65.1%) at 3.0 g/L concentration. Inhibition efficiency increase with increasing concentration of extracts but decreased with rise in temperature. Inhibition mechanism was deduced from the activation and thermodynamic parameters that govern the process. Adsorption of extract on the CS was found to obey the Langmuir adsorption isotherm. The phenomenon of physical adsorption is proposed from the obtained thermodynamic parameters.

Keywords: Mass loss, thermodynamics, inhibition efficiency, half life, gasometric analysis, adsorption.

References

Ananda, B. and Singh, P.M. (2007) “Stress Corrosion Cracking of Welded 2205 Duplex Stainless Steel in Sulfide Containing Caustic Solution”, J. Failure Analy. and Preven. 7(5): 371- 377.

Ananda, L.S., Maruthamuthu, S., Selvanayagam, M., Mohanan S. and Palaniswamy, N. (2005) “Corrosion inhibition of mild steel by ethanol extracts of Ricinus communis leaves”. Indian J. Chem. Tech 12: 356 – 360.

Benali, O., Benmehdi, A., Hasnaui, O., Selles, C. and Salghi, R. (2013) “ Green corrosion inhibitor: inhibitive action of tannin extract of Chamaerops humilis plant for the corrosion of mild steel in 0.5M H2SO4”, J. Mater. Environ. Sci, 4(1): 127 - 138

Chaieb, E., Bouyanzer, A., Hammouti, B. and Benkaddour, M. (2005) “Inhibition of corrosion of steel in 1 M HCl by eugenol derivatives”. J. Appl. Surf. Sci., 246: 199 – 206.

Ebenso, E.E., Eddy, N.O. and Odiongenyi, A.O. (2008). Corrosion inhibitive properties andadsorption behavior of ethanol extract of Piper guinensis as a green corrosion inhibitor for mild steel in H2SO4. Afr. J. Pure and Appl. Chem. (2)11: 107–115.

El-Etre, A.Y. and El-Tantawy, Z. (2006) “Inhibition of metallic corrosion using Ficus extract”, Portugaliae Electrochimica Acta 24: 347-356.

El-Etre, A.Y., Abdallah, M. and El-Tantawy, Z.E. (2005). Corrosion inhibition of some metals using Lawsonia extracts. Corrosion Sci. 47(2): 385–395.

Fatemeh, B.R., Saeed, M. and Athareh, D. (2012). Corrosion inhibition of mild steel in stimulated cooling water by blends of molybdate, nitrite and picrate as new anodic inhibitor. Anti-corrosion Methods and Materials. 59(4): 182 – 189.

Jorge J. P. and Singh P. M. (2003) “Electrochemical Noise (ECN) Measurements as a Corrosion Monitoring Tool”. Corrosion Revi. 20(5): 360-378.

Oguzie, E.E., Onuoha, G.N. and Ejike, E.N. (2007). Effect of Gongrenema latifolium extract on aluminium corrosion in acidic and alkaline media. Pig. and Res. Tech. 36(1): 44-49.

Okafor, P.C., Ikpi, M.E., Uwah, I.E., Ebenso, E.E., Ekpe, U.J. and Umoren, S.A. (2008). Inhibitory action of Phyllanthus amarus extracts on the corrosion of mild steel in acidic media. Corrosion Sci. 50(8): 2310–2317

Okafor, P.C., Osabor, V.I. and Ebenso, E.E. (2007). Eco friendly corrosion inhibitor: Inhibitive action of ethanol extracts of Garcinia kola for the corrosion of mild steel in H2SO4 solutions. Pig. and Res. Tech. 35(5): 299 - 305.

Parameswari, K., Chitra, S., Selvaraj, A., Brindha, S. and Menaga, M. (2012). “InvestigationBenzothiazole Derivatives as Corrosion Inhibitors for Mild Steel”, Port. Electrochim. Acta 30(2):211 – 215

Patrick, E.H., Singh, P.M. and Jeffery, S.H. (2006) “Corrosion Prediction for Carbon Steel in Sulfide Containing Caustic Solutions”, Ind. and Engr. Chem. Res. 45(23): 7789-7794.

Pradeep, C. B. and Mohana, K. N. (2013) Adsorption and Thermodynamic Characteristics of Plumeria rubra Plant Extracts on Mild Steel Corrosion in Industrial Water Medium. Inter. Res. J. Pure and Appl. Chem. 3(4): 330-346

Saratha, R. and Meenakshi, R. (2010) “Corrosion inhibitor: A plant extract”, Der Pharma. Chemica 2(1): 287 – 294

Saratha, R., Priya, S.V. and Thilagavathy, P. (2009) “Investigation of Citrus aurantifolia leaves extract as corrosion inhibitor for mild steel in 1 M HCl”. E-J Chem 6(3): 785-795

Singh, A., Ebenso, E.E. and Quraishi, M.A. (2012).Theoretical and Electrochemical Studies of Metformin as Corrosion Inhibitor for Mild Steel in Hydrochloric Acid Solution. Int. J. Electrochem. Sci. 7: 4766 – 4779.

Singh, A., Ishtiaque, A., Singh, V.K. & Quraishi, M.A. (2011). Inhibition effect of environmentally benign Karanj (Pongamia pinnata) seed extract on corrosion of mild steel in hydrochloric acid solution”. J. Solid State Electrochem. 15(6): 1087 – 1097.

Singh, A., Singh, V.K. and Quraishi, M.A. (2010). Inhibition effect of environmentally benign Kuchla (Strychnos nuxvomica) seed extract on corrosion of mild steel in hydrochloric acid solution. Rasayan J. Chem. 3(4) 811-824.

Uwah, I.E., Ikeuba, A.I., Ugi, B.U. and Udowo, V.M. (2013). Comparative study of the inhibition effects of alkaloid and non alkaloid fractions of the ethanolic extracts of Costus afer stem on the corrosion of mild steel in 5 M HCl solution. Global J. Pure and Appl. Sci. 19(1- 105): 23 - 31.

Uwah, I.E., Ugi, B.U., Ikeuba, A.I. and Etuk, K.E. (2013). Evaluation of the inhibitive action of eco-friendly benign Costus afer stem extract of corrosion of mild steel in 5 M HCl solutions. Int. J. Dev. and Sust. 2(3): 1970 - 1981

Uwah, I.E., Ugi, B.U., and Okafor P.C. (2012). Investigation of the corrosion inhibition effects of Bitters on Mild Steel in acidic medium: A case study of Andrographis paniculata and Vernonia amygdalina. Proceedings of the 35th Annual International Conference, Workshop and Exhibition of the Chemical Society of Nigeria (CSN). 2: 304 – 309.

Uwah, I.E., Ugi, B.U., Okafor, P.C. and Ikeuba, A.I. (2013). Comparative study of the corrosion inhibition and adsorption characteristics of ethanol extracts of Andrographis paniculata (King bitters) and Vernonia amygdalina (Bitter leaf) on Mild steel in HCl solution. Int. J. Appl. Chem. 9 (1): 73 – 88

Zuo, R., Örnek D., Syrett, B.C., Green, R.M., Hsu, C.M., Mansfeld, F.B. & Wood, T.K. (2004). Inhibiting mild steel corrosion from sulfate-reducing bacteria using antimicrobial-producing biofilms in Three-Mile-Island process water. Appl. Microbiol. Biotechnol. 64: 275–283.