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Inhibition of Mild Steel Corrosion in 1.0M & 5.0M H2SO4 Medium of the Fruit Extract of Tetrapleura Tetraptera
Current Issue
Volume 6, 2019
Issue 1 (March)
Pages: 11-17   |   Vol. 6, No. 1, March 2019   |   Follow on         
Paper in PDF Downloads: 36   Since May 20, 2019 Views: 1081   Since May 20, 2019
Authors
[1]
Rita Oghenenyerhovwo Ididama, Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria.
[2]
Vincent Ishmael Egbulefu Ajiwe, Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria.
Abstract
The corrosion inhibition of mild steel in 1.0M & 5.0M sulphuric acid solutions by crude extracts of the fruit of Tetrapleura tetraptera was studied using gravimetric and gasometric techniques. The results showed that fruit of Tetrapleura tetraptera can function as good corrosion inhibitor in acid medium. Inhibition efficiencies (%I) of the fruit of Tetrapleura tetraptera extracts was found to reach 85.97 % & 91.46% for 1.0M H2SO4 while for 5.0M was 83.48% & 82.49% for gravimetric and gasometric analyses respectively. The corrosion inhibition efficiency increased with increase in the concentration of the extracts and decreased with the increase in time and temperature. The corrosion inhibition efficiency exhibited by the Tetrapleura tetraptera fruit extracts is attributed to the stronger adsorption of the phytochemicals present in the plant extracts unto the mild steel. The mechanism of adsorption proposed for the Tetrapleura tetraptera fruit extracts is physical adsorption. The corrosion inhibition of the fruit of Tetrapleura tetraptera extracts followed Langmuir, Tempkin and Freundlich adsorption isotherms.
Keywords
Mild Steel, Corrosion, Sulphuric Acid, Tetrapleura tetraptera Fruit Extract, Gravimetric, Gasometric
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