Abstract

The inhibitive action of Polyalthialongifolia bark extracts on the corrosion of mild steel in 0.5 M H2SO4 has been studied using the weight loss technique. The concentration of the extract used was varied (0.1, 0.2, 0.3, 0.4, and 0.5) g/l over an exposure period of 24 hours and the temperature variation was 303 k, 323 k and 343 k respectively. The corrosion rates decreased generally with increase in inhibitor concentration. The inhibition efficiency was found to increase with increasing inhibitor concentration. The effect of temperature on the corrosion inhibition of the mild steel indicated an increase in the corrosion rate as temperature increased and subsequent decrease in the inhibition efficiency. Thermodynamic data calculated are suggestive of adsorption of inhibitor molecules on metal surface. Experimental data fitted into Langmuir’s and Temkin’s adsorption isotherms.

Keywords: Mild steel, Polyalthialongifolia bark, Weight loss method, Adsorption, Kinetic

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How to Cite
[1]
Adams, S.M. et al. 2019. Thermodynamic, Kinetic and Adsorptive Parameters of Corrosion Inhibition of Mild Steel Using Polyalthialongifolia Bark Extract in 0.5M H2SO4. International Journal of Science and Engineering Invention. 6, 05 (Dec. 2019), 1 to 7.

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Copyright © 2019 S. M. Adams V.S. Aigbodion I.Y. Suleiman I.M. Momoh this is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.