INVESTIGATING THE EFFECT OF ALOE-VERA EXTRACT ON THE CORROSION INHIBITION OF MEDIUM CARBON STEEL IN SEAWATER

Year 2022, Volume: 5 Issue: 2, 84 - 90, 31.12.2022

Ufuoma Unueroh Amos Omoefe Ebebeinwe

Abstract

Corrosion is said to be a function of the material and the environment it is exposed to. If that is the case, it follows therefore that corrosion inhibitor efficiency could also be a function of the material and the environment. This work focuses on the effect of aloe vera extract on 0.39%C steel in seawater. Aloe vera extracts of 1%, 2%, 3% and 4% concentrations gotten from 2kg of aloe vera plant were added to the corrosive media. They were exposed for a period of 1008th hours. The gravimetric and the potentiometer method was used for the analysis. The results from the gravimetric study shows that there was an increase in the inhibitor efficiency as the concentration of the extracts increased, but decreased with prolonged exposure time. Samples were retrieved from the environment at an interval of 168th hours. The extract was found to be more effective in seawater at 4% concentration with 85% inhibitor efficiency at 168th hour. The potentiometer results also affirmed that the sample with 4% aloe vera addition had the highest efficiency with about 97%. Though there was shift at both the anodic and cathodic slope, the inhibitor was observed to act more as an anodic inhibitor. The result therefore shows that aloe vera can act as an inhibitor to 0.39%C steel in seawater.

Keywords

seawater, Aloe Vera Extract, Inhibitor Efficiency, Corrosion Rate

References

• [1] Soror T.Y. Saffron extracts as environmentally safe corrosion inhibitors for aluminium dissolution in 2M HCl solution. European Chemical Bulletin. 2013, 2(4):191-6.
• [2] James A.O and Akaranta O. Corrosion inhibition of aluminum in 2.0 M hydrochloric acid solution by the acetone extract of red onion skin. African Journal of Pure and Applied Chemistry. 2009, 3(12):262-8.
• [3] Ghazi Z, ELmssellem H, Ramdani M, Chetouani A, Rmil R, Aouniti A, Jama C and Hammouti B. Corrosion inhibition by naturally occurring substance containing Opuntia- Ficus Indica extract on the corrosion of steel in hydrochloric acid. J Chem Pharm Res. 2014, 6:1417-25 . [4] Buchweishaija J. Phytochemicals as green corrosion inhibitors in various corrosive media: a review. Tanzania Journal of Science. 2009, 35.
• [5] Davis G.D, Krebs L, Dacres C.M, and Von Fraunhofer JA. The use of tobacco extracts as corrosion inhibitors. InCORROSION 2001,Mar 11. OnePetro.
• [6] Yang B, Chen W and Mu D.H. Study of garlic extract as a green corrosion inhibitor for mild steel in acidic media. InAdvanced Materials Research 2014, (Vol. 960, pp. 118-125). Trans Tech Publications Ltd.
• [7] Al–Asadi, A.A., Abdullah, A.S., Khaled, N.I. and Alkhafaja, R.J. Effect of an Aloe Vera As a Natural Inhibitor on The Corrosion of Mild Steel in 1 wt.% NaCl. Int J Eng Technol, 2015, 2(06).
• [8] Cang, H., Fei, Z., Shao, J., Shi, W. and Xu, Q. Corrosion inhibition of mild steel by aloes extract in HCl solution medium. International Journal of Electrochemical Science. 2013, 8(1), pp.720-734.
• [9] Sribharathy V., Rajendran S., Rengan, P and Nagalakshmi, R. Corrosion inhibition by an aqueous extract of Aloe vera. (L.) Burm F. (Liliaceae) Section B-Research Paper Eur. Chem. Bull 2013, 2(7), 471-476 471
• [10] Cang, H., Zhenghao Fei, Z., Jinling Shao, J., Wenyan Shi1 W. and Xu1, Q. Corrosion Inhibition of Mild Steel by Aloes Extract in HCl Solution Medium. International Journal of Electrochemical Science. 2013, Vol. 8 720 – 734.
• [11] Buchweishaija, J. Inhibiting Properties and Adsorption of an Amine Based Fatty Acid Corrosion Inhibitor on Carbon Steel in Aqueous Carbon Dioxide Solutions. 1997
• [12] Langdon, C. Determination of dissolved oxygen in seawater by wrinkler titration using the amperometric technique 2010
• [13] Gros, N. Ion chromatoraphic analyss of seawater, brines and related samples. Water. 2013, 5(2):659-76
• [14] Loto, R.T. and Loto, C.A. Effect of P-Phenylediamine on the Corrosion of Austenitic. Stainless Steel Type 304 in Hydrochloric Acid. International Journal of Electrochemical Science, 7, 2012, pp 9423-9440
• [15] Unueroh U.G and Onyekpe B. The Effect of the Environment on the Corrosion Penetration Rate of AISI 1046 Steel. Journal of the Nigeria Association of Mathematical Physics, 2014, Vol.27 pp. 427-430 wwwnampjournals.org
• [16] Pradeep Kumar, C.B. and Mohana, K.N. Phytochemical Screening and Corrosion Inhibitive Behavior of Pterolobium hexapetalum and Celosia argentea plant extracts on mild steel in industrial water medium. Egyptian Journal of Petroleum 2014, 23, pp. 201 – 211.
• [17] Kumar, K. P., Pillai, M. S. and Thusnavis, G. R. Inhibition of Mild Steel Corrosion in Hydrochloric Acid by the Seed Husk Extract of Jatropha curcas, Journal of Material Environment Science, 2010,1(2),pp. 119-128
• [18] Malomo, O.E., Yaro, S.A., Yawas, D.S. and Akande, A.S. Inhibitive and Mechanical Properties of Cock’s Comb and African Star Apple Leaves Extract on the Corrosion of Medium Carbon Low Alloy Steel in 1M H2SO4 Solution. International Journal of Engineering, 2016, ANNALS of Faculty of Engineering Hunedoara.