Green Approach to Corrosion Control of Mild Steel in H3PO4 Using Chromolaena odorata Leaves Extract: Optimization

This study investigated the optimization and effectiveness of corrosion control of Chromolaena odorata leaves extract (COLE) on mild steel in H 3 PO 4 . Box–Behnken design was used in this study to determine the influence of variables: temperature (30–60 °C), inhibitor concentration (0.2–0.8 g/l), a...

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Bibliographic Details
Published in:Journal of bio- and tribo-corrosion 2024-09, Vol.10 (3), Article 50
Main Authors: Oyewole, Olamide, Ugwu, George Kene, Oshin, Temitope Alaba, Abayomi, Siji Tunbosun
Format: Article
Language:English
Subjects:
Biological activity
Biomaterials
Chemistry and Materials Science
Chromolaena odorata
Constituents
Corrosion
Corrosion and Coatings
Corrosion inhibitors
Corrosion potential
Corrosion prevention
Corrosion rate
Corrosion tests
Design optimization
Fourier transforms
Infrared analysis
Infrared spectroscopy
Low carbon steels
Materials Science
Phytochemicals
Qualitative analysis
Scanning electron microscopy
Solid Mechanics
Steel
Tribology
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Summary:This study investigated the optimization and effectiveness of corrosion control of Chromolaena odorata leaves extract (COLE) on mild steel in H 3 PO 4 . Box–Behnken design was used in this study to determine the influence of variables: temperature (30–60 °C), inhibitor concentration (0.2–0.8 g/l), and duration of immersion (3–12 days) on corrosion rate. The extract was subjected to phytochemical analysis to determine the quantitative and qualitative quantities of bioactive constituents in COLE. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR) were used to characterize the samples. The result of phytochemical analysis showed the presence of bioactive constituents that extract makes extracts a good inhibitor. The optimal process conditions observed were as follows: time: 7.5 days, temperature: 45 °C, and inhibition concentration: 0.5 g/l with corrosion rate of 0.0002650 g/mm 2 days. The SEM and FT-IR result from the validated experiment revealed that compared to mild steel which corrodes at the slowest rate, more passive films were seen due to absorption. The inhibitive potential of Chromolaena odorata leaves extract is a good corrosion inhibitor in the acidic environment.
ISSN:2198-4220
2198-4239
DOI:10.1007/s40735-024-00852-2