Analysis of the protection performance of admixed citronella and myrrh essential oil extracts on high carbon steel corrosion in CH3COOH and C6H8 O7 solution

Loto, R. T. (2022) Analysis of the protection performance of admixed citronella and myrrh essential oil extracts on high carbon steel corrosion in CH3COOH and C6H8 O7 solution. Journals of materials research and technology, 21. pp. 4386-4397.

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Abstract

Protection performance of admixed citronella and myrrh essential oil extract (CNM) on the corrosion resistance of high carbon steel (HCS) in 3 M of CH 3COOH and C 6H 8 O7 solution was evaluated by potentiodynamic polarization, open circuit potential measurement, weight loss measurement, x-ray diffractometry and ATF-FTIR spectroscopy. Results showed CNM performed effectively in CH3 COOH with optimal inhibition of 87.47% and 80.12% at 1.67% concentration from potentiodynamic polarization and weight loss. CNM performed poorly in C 6H 8 O7 solution with highest value of 41.29% and 43.81% at 1.67% CNM concentration from both tests. In both acids inhibition efficiency increased with increase in CNM concentration coupled with the exhibition of mixed-type inhibition effect. Open circuit potential plots show CNM significantly reduces the activation barrier for HCS to corrode wherewith the plots in the presence of CNM extract where significantly electropositive compared to the plot from C 6H 8 O7 solution without CNM. In CH 3COOH, the action of protonated CNM molecules and CH 3CO 2 anions results in the formation of complexes that increases the reactivity of HCS surface and its thermodynamic tendency to corrode despite effective inhibition performance. X-ray diffractometry shows admixed extract caused significant decrease in intensity/counts for diffraction peaks of Fe 2O 3 and Fe 3O 4 compounds on the spectrum plots compared to the plots without the extracts. ATF-FTIR spectroscopy shows significant reduction in transmittance at specific range of wave numbers occurred within CNM/CH 3COOH solution after corrosion, and on HCS surface after corrosion in the presence of the extracts compared to CNM/CH 3COOH before corrosion. This contrast the results obtained from CNM/C 6H 8 O7 solution.

Item Type:	Article
Uncontrolled Keywords:	Corrosion management Inhibitor Steel Plant extract
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User:	AKINWUMI
Date Deposited:	15 Feb 2023 14:02
Last Modified:	15 Feb 2023 14:02
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/16611

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