S. Sobri, N. Rahim


In recent years, industrial sectors are concerned with the corrosion of metal and alloys and they also received huge attention from researcher to overcome these problems. To decelerate the rate of corrosion or to stop the corrosion to occur, one of the common methods to deal with this problems is using green inhibitor. The use of local wastes which are organic in nature for the production of green corrosion inhibitor is no doubt the trend of the day. To arrive at an inexpensive non-toxic, eco-friendly inhibitor formulation, the present study on the use of coconut pulp waste extract of Cocon Nucifera L. has been carried out by the weight loss method. The aim of this project is to study the inhibitive effect in terms of time and concentration of the coconut pulp waste extract on the acid corrosion of mild steel in 1.0 M HCL solution. Result showed that the inhibition efficiency was found to increase with increasing inhibitor concentration up to maximum 94.52% for 10 %v/v at 48 hours immersion time. Examination on the extract by Fourier transform infrared spectroscopy (FTIR) confirms that the extract contains functional group of N-H, O-H, C-H, C≡C, C=O, C=C, C-F and C-O that good for corrosion inhibitor while scanning electron microscopy (SEM) studies showed that the deposition of coconut pulp extract on the metal surface. The results of all studies confirmed that the extract of coconut pulp has great potential to prevent the corrosion of mild steel in acidic environment with highest % IE is 94.52 % and the corrosion rate is 3.6919 x10-5.


Mild steel, coconut pulp extract, acid corrosion, weight loss, corrosion inhibition

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A. Ostovari, S. M. Hoseinieh, M. Peikari, S. R. Shadizadeh, S. J. Hashemi. 2009. Corrosion Inhibition of Mild Steel in 1M HCl Solution by Henna Extract: A Comparative Study of the Inhibition by Henna and Its Constituents (Lawsone, Gallic Acid, α-d-Glucose and Tannic Acid. Corros. Sci. 51: 935.

Al-Turkustani, A. M., Arab, S. T., Al-Qarni, L. S. S. 2011. Medicago Sative Plant as Safe Inhibitor on the Corrosion of Steel in 2.0M H2SO4 Solution. J. Saudi Chem. Soc. 15(1): 73-82.

Bothi Raja, P., Sethuraman, M. G. 2009a. Inhibition of Corrosion of Mild Steel in Sulphuric Acid Medium by Calotropis Procera. Pig. Res. Tech. 38: 33-37.

Bothi Raja, P., Sethuraman, M. G. 2008. Natural Products as Corrosion Inhibitors for Metals in Corrosive Media–A Review. Mater. Lett. 62: 113-116.

Bothi Raja, P., Sethuraman, M. G. 2009b. Strychnos Nux-vomica–An Eco-Friendly Corrosion Inhibitor for Mild Steel in 1M Sulfuric Acid Medium. Mater. Corros. 59: 22-28.

Bothi Raja, Pandian, Sethuraman, Mathur Gopalakrishnan. 2008. Inhibitive Effect of Black Pepper Extract on the Sulphuric Acid Corrosion of Mild Steel. Mater. Lett. 62: 2977-2979.

De Souza, F. S., Sinelli, A. 2009. Caffeic Acid as a Green Corrosion Inhibitor for Mild Steel. Corros Sci. 51: 642-649.

Fekry, A. M., Mohamed, Riham R. 2010. Acetyl Thiourea Chitosan as an Eco-Friendly Inhibitor for Mild Steel in Sulphuric Acid Medium. Electrochem Acta. 55: 1933-1939.

Fomin, M. N., Zhigalova, K. A. 1986. Methods of Corrosion Testing of Metals. Metallurgiya. Moscow. 11-18.

Fu, Jia-jun, Li, Su-Ning, Wang, Ying, Cao, Lin-Hua, Lu, Lu-De. 2010. Computational and Electrochemical Studies of Some Amino Acid Compounds as Corrosion Inhibitors for Mild Steel in HCL Solution. J. Mater. Sci. 45: 6255-6265.

G. Avci. 2008. Corrosion Inhibition of Indole 3-Acetic Acid on Mild Steel in 0.5 M HCl. Colloids Surf. A. 317: 730-736.

Garai, Subhadra, Garai, Saraswati, Jaisankar, Parasuraman, Sing, J. K., Elango, Adirajan. 2012. A Comprehensive Study on Crude Methanolic Extract of Artemisia Pallen (Asteraceae) and Its Active Components as Effective Corrosion Inhibitors of Mild Steel in Acid Solution. Corros Sci. 60: 193-204.

Hazwan Hussin, M., Jain Hassin, M. 2011. The Corrosion Inhibition and Adsorption Behaviour of Uncaria Gambir Extract on Mild Steel in 1.0 M HCL. Mater. Chem. Phys. 125: 461-468.

Ji, G., Anjum, S., Sundaram, S., & Prakash, R. 2015. Musa Paradisica Peel Extract as Green Corrosion Inhibitor for Mild Steel in HCl Solution. Corrosion Science. 90: 107-117.

Li, Lingjie, Zhang, Xueping, Lei, Jinglei, He, Jianxin, Zhang, Shengtao, Pan, Fusheng. 2012a. Adsorption and Corrosion Inhibition of Osmanthus Fragran Leaves Extract on Carbon Steel. Corros. Sci. 63: 82-90.

Li, X., Deng, S., Fu, H., Mu, G. 2009. Inhibition Effect of 6-Benzylaminopurine on the Corrosion of Cold Rolled Steel in H2SO4 Solution. Corros. Sci. 51: 620-634.

Li, Xianghong, Deng, Shuduan, Fu, Hui, 2012b. Inhibition of the Corrosion of Steel in HCL, H2SO4 Solution by Bamboo Leaf Extract. Corros Sci. 62: 163-175.

Lyon, Stuart, 2004. A Natural Solution to Corrosion. Nature. 427: 406-407.

M. Behpour, S.M. Ghoreishi, M. Khayatkashani, and N. Soltani. 2011. The Effect of Two Oleo-cum Resin Exudate from Ferula Assa-Foetida and Dorema Ammoniacum on Mild Steel Corrosion in Acid Media. Corros. Sci. 53: 2489-2501.

N. O. Eddy and S. A. Odoemelam. 2009. Inhibition of the Corrosion of Mild Steel in H2SO4 by Ethanol Extract of Aloe Vera. Resin & Pigment Technology. 38(2): 111-115.

Ostovari, A., Hoseinieh, S. M., Peikari, M., Shadizadeh, S. R., Hashemi, S. J. 2009. Corrosion Inhibition of Mild Steel in 1M HCL Solution by Henna Extract: A Comparative Study of the Inhibition by Henna and Its Constituents (Lawsone, Gallic Acid, @a-d-Glucose And Tannic Acid). Corrosion Science. 51(9): 1935-1949.

Prabhu, R. A., Venkatesha, T. V., Shanbhag, A. V. 2009. Carmine and Fast Green as Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution. J. Iran. Chem. Soc. 6(2): 353-363.

Ramananda Singh, M. 2013. A Green Approach: A Corrosion Inhibition of Mild Steel by Adhatoda Vasica Plant Extract in 0.5 M H2SO4. J. Mater. Environ. Sci. 4(1): 119-126.

Ramananda Singh, M., Gupta, P., & Gupta, K. 2015. The Litchi (Litchi Chinensis) Peels Extract as a Potential Green Inhibitor in Prevention of Corrosion of Mild Steel in 0.5M H2SO4 Solution. Arabian Journal of Chemistry. 0-6.

Sheng, Xiaoxia, Ting, Yeng-Peng, Pehkonen, Simo Olavi. 2007. Evaluation of an Organic Corrosion Inhibitor on Abiotic Corrosion Microbiologically Influenced Corrosion of Mild Steel. Ind. Eng. Chem. Res. 46: 7117-7125.

U. M. Eduok, S. A. Umoren, and A. P. Udoh. 2012. Synergistic Inhibition Effect between Leaves and Stem Extract of Sida acuta and Iodide Ion for Mild Steel Corrosion in 1M H2SO4 Solutions, Arabian. J. Chem. 5: 325-337.



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