[1]
Rita Oghenenyerhovwo Ididama, Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria.
[2]
Vincent Ishmael Egbulefu Ajiwe, Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria.
The corrosion inhibition of mild steel in 1.0M & 5.0M sulphuric acid solutions by crude extracts of the fruit of Tetrapleura tetraptera was studied using gravimetric and gasometric techniques. The results showed that fruit of Tetrapleura tetraptera can function as good corrosion inhibitor in acid medium. Inhibition efficiencies (%I) of the fruit of Tetrapleura tetraptera extracts was found to reach 85.97 % & 91.46% for 1.0M H2SO4 while for 5.0M was 83.48% & 82.49% for gravimetric and gasometric analyses respectively. The corrosion inhibition efficiency increased with increase in the concentration of the extracts and decreased with the increase in time and temperature. The corrosion inhibition efficiency exhibited by the Tetrapleura tetraptera fruit extracts is attributed to the stronger adsorption of the phytochemicals present in the plant extracts unto the mild steel. The mechanism of adsorption proposed for the Tetrapleura tetraptera fruit extracts is physical adsorption. The corrosion inhibition of the fruit of Tetrapleura tetraptera extracts followed Langmuir, Tempkin and Freundlich adsorption isotherms.
[1]
Raja, P. B. and Sethuraman M. G. (2008), Natural products as corrosion inhibitor for matals in corrosive media, Materials Letters 62 (1): 113-116.
[2]
Okafor, P. C., Ebenso, E. E., and Ekpe, U. J. (2010). Azardirachtaindica extracts as corrosion inhibition of mild steel in acid medium. International journal Electrochemical science, 5: 978-993.
[3]
Al-Otaibi M. S. and Alkhathlan H. Z. (2014). Corrosion inhibitory action of some plant extracts on the corrosion of mild steel in acidic medium, 7 (3), 340-346.
[4]
Karthiga, N., Rajeudran, S., Probhakar, P., Joseph, R. and Rathish (2015). International journal of nano corrosion scienceand engineering, 2 (4), 31-49.
[5]
Essien, E. U., Izunwane, B. C., Aremu, C. V. and Eka, O. U. (1995). Significance for humans of the nutrient contents of the dry fruit of Tetrapleura tetraptera, plant food and animal nutrition, 45: 47-51.
[6]
Okwu, D. E. (2003). The potentials of Ocimumgratissimum, Pargulariaextensa and Tetrapleura tetraptera as spice and flavouring agent. Nigeria Agricultural Journal, 35: 143-148.
[7]
Enwere, N. J. (1998). Foods of plant origin. International journal of microbiology, 9: 329-334.
[8]
Akah, P. A and Nwabie O. K. (1993). Antibacteria activity of Tetrapleura tetraptera, Fitoterapia 1 (5): 42-44.
[9]
Eddy, N. O., and Ebenso, E. E. (2010) Adsorption and quantum chemical studies on cloxacilin and halide for the corrosion of mild steel in acidic medium, International Journal of Electrochemical Science, 5: 731-750.
[10]
Umeron, S. A., Eduok, U. M., Solomon, M. M. and Udoh, A. P. (2011). Corrosion inhibition by leaves and stem extracxts of sidaacuta of mild steel in 1M H2SO4solutions investigated by chemical and spectroscopic technique, Arabian journal of chemistry, dio 10.1016.
[11]
Kumar, G. S., Jayaveera, K. N., Kumar, C. K. A., Sanjay, U. P., Swamy, B. M. V. and Kumar, D. V. K. (2007) Antimicrobial effects of Indian medicinal plants against acne-inducing bacteria, Tropical Journal of Pharmaceutical Research, 6: 717-723.
[12]
Parekh, J., and Chanda, S. V. (2007) In vitro antimicrobial activity and phytochemical analysis of some Indian medicinal plants, Turkish Journal of Biology, 31: 53-58.
[13]
Onwukaeme, D. N., Ikuegbvweha, T. B., and Asonye, C. C. (2007) Evaluation of phytochemical constituents, antibacterial activities and effect of exudates of Pycanthusangolens is WeldWarb (Myristicaceae) on corneal ulcers in rabbits, Tropical Journal of Pharmaceutical Research, 6: 725-730.
[14]
Okafor, P. C. and Ebenso, E. E. (2007). Inhibitory action of C. papaya extracts on the corrosion of mild steel. Pigment & Resin technology, 36 (3): 134-140.
[15]
Onwukaeme, D. N., Ikuegbvweha, T. B., and Asonye, C. C. (2007) Evaluation of phytochemical constituents, antibacterial activities and effect of exudates of Pycanthusangolens is WeldWarb (Myristicaceae) on corneal ulcers in rabbits, Tropical Journal of Pharmaceutical Research, 6: 725-730.
[16]
Bentiss, F., Jama, C., Mernari, B., El Attari, H., El Kadi, L., Lebrini, M., Traisnel and Lagrenee, M. (2009). Corrosion control of mild steel using 3,5-bis (4-methoxyphenyl)-4-amino-1,2,4-triazole in normal hydrochloric acid medium, coorosion science, 51: 1628-1635.
