Corrosion inhibition of aqueous extract of Garcinia indica for 6063 aluminium alloy in 2.0 M phosphoric acid solution

Prabhu, Deepa and Padmalatha, * (2015) Corrosion inhibition of aqueous extract of Garcinia indica for 6063 aluminium alloy in 2.0 M phosphoric acid solution. International Journal of Applied Engineering Research, 10 (78). pp. 7-12. ISSN 0973-4562

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Abstract

The corrosion inhibition characteristics of Garcinia indica extract (GIE) on the corrosion of 6063 aluminium in 2.0M phosphoric acid solution were studied by using potentiodynamic polarization using Tafel extrapolation technique and electrochemical impedance spectroscopy (EIS) techniques at different temperatures and at different concentrations of inhibitor. Kinetic parameters and thermodynamic parameters were evaluated and discussed in detail. Inhibition efficiency increased with extract concentration and increased with temperature. The adsorption of GIE on metal surface obeyed Langmuir adsorption isotherm. GIE acted as mixed inhibitor in phosphoric acid solution and followed chemisorption on the surface of 6063 Al alloy

Item Type: Article
Uncontrolled Keywords: 6063 Al alloy, Garcinia indica, Tafel extrapolation technique, EIS technique
Subjects: Applied Science > ICAS Manipal
Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 19 Nov 2015 10:21
Last Modified: 19 Nov 2015 10:21
URI: http://eprints.manipal.edu/id/eprint/144575

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