Inhibition of Mild Steel Corrosion in HCl Solution by GongronemalatifoliumMethanolExtract
Journal Title: IOSR Journal of Applied Chemistry (IOSR-JAC) - Year 2018, Vol 11, Issue 11
Abstract
Corrosion inhibition effect of methanol extract of Gongronemalatifoliumon mild steel in HCl solution was studied using gasometric methods at 303K, 313K and 323K. The inhibition efficiency was found to increase as the concentration of extracts increased from 0.1%w/v to 0.5%w/v and decreased with increase in temperature. The maximum efficiency of inhibition was found to be 77.17% at 303K. Values of activation energy for the inhibited system were greater than the values obtained for the uninhibited system. Physical adsorption mechanism was proposed for the adsorption of the inhibitor from the trend of the inhibition efficiency with temperature and the values of πΈπ ,ππππ and βπΊπππ obtained. The adsorption of Gongronemalatifolium extract on the surface of the mild steel followed Langmuir, Freundlich and El-Awardy adsorption isotherms.
Authors and Affiliations
Onwumelu H. A. , Aralu C. C. , Egwuatu C. I.
Keywords
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- EP ID EP414433
- DOI 10.9790/5736-1111013544.
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