Comparative analysis of corrosion inhibition on mild steel by parts of anogeissus leiocarpusin acidic medium
Keywords:
Anogeisuss leiocarpus, Potentiodynamic polarization (PDP), Weight loss, Gas chromatography mass spectroscopy (GCMS)Abstract
This research investigates the corrosion inhibition by parts of Anogeisuss leiocarpus on mild steel in 0.5 M H2SO4 under temperature conditions of 30 -60 ℃ and exposure time of 3, 6 and 9 h using weight loss, and Potentiodynamic polarization (PDP) methods. The inhibition efficiencies (IE %) of the parts follows the trend: root (91.73 %) and leaf (89.64 %). The result shows with increase in the concentration (0.2 g, 0.4 g, 0.6 g and 0.8 g) of the methanol extract, inhibition efficiency (IE %) increases. Temperature and exposure time increase reveals increase in corrosion rate, hence decrease in inhibition efficiency (IE %). The gas chromatography mass spectroscopy (GCMS) result for the root and leaf reveals the phytoconstituents like Hexadecanoic acid, ethyl ester (30.42 %), DL-alpha-Hydroxylysine (18.27 %) , Glycerol 1-palmitate (17.63 %), 9-Octadecenoic acid (Z)-, methyl ester (29.45 %), Benzene, 2-methoxy-4-methyl-1-(1-methylethyl)- (21.78%), and Norcodeine (11.21 %) respectively may be responsible for the variation in the inhibition efficiencies between root and leaf.
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Copyright (c) 2025 S. J. I. Ibejekwe (Author); B. Eke Uche, Sunday Elaigwu, J. R. Waziri (Translator)
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