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The Inhibiting Effect of Entada Africana Leaves Extract (EALE) on Corrosion of Mild Steel in 1 M HCL and 0.5 M H2SO4 Acidic Media

Authors: *Hammajam, A.A., Gujja, A. And Mshelia, Z.A.

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The use of inhibitors for the control of corrosion of metals and alloys which are in contact with aggressive environment is among the acceptable practices used to reduce and/or prevent corrosion. The inhibiting effect of Entada africana leaves extract (EALE) on corrosion of mild steel in 1 M HCL and 0.5 M H2SO4 acidic media was investigated in this study. The corrosion rate of mild steel and the inhibition efficiencies of the extract were calculated. The results obtained show that the extract could serve as an effective inhibitor for the corrosion of mild steel in acidic media. The inhibition efficiency increased with increase in concentration of the inhibitor and decreased with temperature. The inhibition efficiency was also found to be significantly increased with time of exposure for the first 3 hours of the experiment for both 1 M HCL and 0.5 M H2SO4 before it declined. Therefore, the Maximum Inhibition efficiency of EALE at 0.8%v/v concentration was found to be 96.2% in 1M HCl and 92.1% in 0.5 M H2SO4 at 3hr immersion. The phytochemical analysis of the EALE was performed; the result showed that organic constituents were present which made the Entada africana leaves extract a good inhibitor.

Affiliations: Department of Mechanical Engineering, Nigerian Army University Biu, Nigeria.
Keywords: Corrosion, Inhibitors, Entada Africana, Phytochemical, Acidic Media
Published date: 2023/12/30

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ISSN: 2635-3342 (Print)

ISSN: 2635-3350 (Online)

DOI: In progress

ISI Impact Factor: In progress

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Chemical Engineering Department, Faculty of Engineering, University of Benin, PMB 1154, Ugbowo, Benin City, Edo State, Nigeria.