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Protection performance of orange oil distillates on low carbon steel in dilute acid electrolytes

Loto, R. T. and Mbah, Ekene Henry and Ugada, Jennifer (2021) Protection performance of orange oil distillates on low carbon steel in dilute acid electrolytes. In: IOP Conf. Series: Materials Science and Engineering, 2020, Online.

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Orange essential oil distillate (OOE) was studied for its inhibition performance on low carbon steel in 0.5 M H2SO4 and HCl aqueous electrolyte by electrochemical method and open circuit potential measurement. OOE performance was significantly proportional to it concentration with highest protection efficiency of 76.93% and 94.90% at optimal OOE concentration (10% OOE) in H2SO4 and HCl electrolyte. The performance of OOE at low concentration in H2SO4 was quite poor with inhibition efficiency values below 40%. OOE exhibited greater inhibition action in HCl solution with effective performance beginning at 4% OOE concentration compared to 6% concentration in H2SO4 electrolyte. Corrosion potential deviated basically in the anodic direction signifying the dominant inhibition effect to be through surface coverage of the steel surface. OOE exhibited mixed type corrosion inhibition. Open circuit potential graphs show OOE increases the thermodynamic fluctuation of the carbon steel in H2SO4 solution relative to the plots at 0% OOE, despite effective protection. In HCl, the open circuit potential plots were more electropositive relative to the plots at 0% OOE signifying decreased tendency to corrosion. Optical images of the carbon steel after evaluation with and without OOE significantly contrast each other.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 01 Mar 2022 10:42
Last Modified: 01 Mar 2022 10:42

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