Corrosion inhibition of aqueous extract of garcinia indica for 6063 aluminium alloy in 2.0 m phosphoric acid solution

Deepa Prabhu, Padmalatha

Research output: Contribution to journalArticle

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.

Original languageEnglish
JournalInternational Journal of Applied Engineering Research
Volume10
Issue number78 Special Issue
Publication statusPublished - 01-01-2015

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Phosphoric acid
Aluminum alloys
Corrosion
Potentiodynamic polarization
Chemisorption
Electrochemical impedance spectroscopy
Adsorption isotherms
Kinetic parameters
Extrapolation
Thermodynamics
Aluminum
Adsorption
Temperature
Metals

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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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.",
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AB - 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.

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