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Corrosion Inhibitive Performance of the Waste Orange Peels (Citrus Sinensis) on A36 Mild Steel in 1M HCl

Ayoola, A. A. and Durodola, B. M. and Fayomi, O. S. I and Agboola, Oluranti and Alagbe, Edith Egbimhanlu. and Olagoke, Oladokun and Nnabuko, D. (2022) Corrosion Inhibitive Performance of the Waste Orange Peels (Citrus Sinensis) on A36 Mild Steel in 1M HCl. Int. J. Electrochem. Sci, 17.

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This research work was carried out to investigate the corrosion inhibitive performance of the extract obtained from waste peels of orange (citrus sinensis) on A36 mild steel in HCl medium. A36 mild steel metal coupons were immersed in dilute hydrochloric acid solution (1M) containing different concentrations of the waste orange peels extract inhibitor (0 – 4 g/L) at different temperatures of 320C & 450C (during gravimetric tests), as well as 270C & 500C (during potentiodynamic tests). The gravimetric analysis performed revealed the highest inhibition efficiency of the extract to be 94.33% at concentration of 4 g/L and temperature of 320C. Also, results from this analysis revealed a spontaneous (irreversible) and physisorption mode of adsorption of the inhibitor molecules as well as the fitness of the Langmuir adsorption isotherm for the adsorption process. The phytochemical analysis carried out revealed the presence of tannins, saponins, flavonoids, terpenoids and steriods in the inhibitor. The results of the potentiodynamic polarization analysis showed that the inhibitor retarded the anodic dissolution of mild steel more than the cathodic reaction which causes hydrogen evolution via the discharge of hydrogen ions.

Item Type: Article
Uncontrolled Keywords: Corrosion; HCl; Inhibitor; Mild steel; Waste orange peels.
Subjects: Q Science > QD Chemistry
T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: AKINWUMI
Date Deposited: 19 Jul 2023 12:55
Last Modified: 19 Jul 2023 12:55

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