Experimental and Theoretical Study on the Corrosion Inhibition of Mild Steel in Acidic Medium Using Ethanolic Extract of ziziphus spina-christi leaves

David E. Arthur1*, Joseph C. Akan1, Ugwoke Augustina Oyibo2, Muhammad Bakura1, Adebiyi Adedayo Babafemi3

1Department of Pure and Applied Chemistry, University of Maiduguri P.M.B 1069, Borno-Nigeria
2Department of Chemistry, Nigerian Police Academy Wudil, Kano-Nigeria
3Sheda Science and Technology Complex Abuja, Nigeria

*Corresponding author’s Email: eadavid@unimaid.edu.ng, doi.org/10.55639/607.02010013


ABSTRACT

This study investigates the corrosion inhibition of mild steel in 0.3 M HCl using ethanolic extract of Ziziphus spina-christi leaves. Using the weight loss technique, the extract demonstrated good corrosion inhibition efficiency, ranging from 56.13% to 64.24% at 303 K. The corrosion rate decreased as the inhibitor concentration increased, with surface coverage and inhibitor efficiency improving as well. The adsorption of the extract on the mild steel surface was exothermic, spontaneous, and aligned with physical adsorption. The adsorption followed the Langmuir isotherm.

Keywords:

Adsorption,
Corrosion,
Inhibition,
Mild Steel,
Ziziphus
spina-christi