Coriandrum sativum L. - A novel green inhibitor for the corrosion inhibition of aluminium in 1.0 M phosphoric acid solution

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Abstract

The corrosion inhibition characteristics of aqueous extract of seeds of Coriandrum sativum L. (CSE) have been studied as an eco-friendly green inhibitor for corrosion control of aluminium in 1.0 M phosphoric acid solution using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The effects of inhibitor concentration and temperature on the inhibition action were investigated. The adsorption of CSE on metal surface obeyed Langmuir adsorption isotherm. Polarization measurements showed that the CSE acted as mixed inhibitor in 0.5 M and 2.0 M phosphoric acid solution and the inhibitor molecules followed physical adsorption on the surface of aluminium. The surface morphology of aluminium, in the absence and presence of CSE in 1.0 M phosphoric acid solution, was studied using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Results obtained from Tafel extrapolation and A.C electrochemical impedance spectroscopy (EIS) techniques were in good agreement.

Original languageEnglish
Pages (from-to)676-683
Number of pages8
JournalJournal of Environmental Chemical Engineering
Volume1
Issue number4
DOIs
Publication statusPublished - 12-2013

Fingerprint

Phosphoric acid
Corrosion inhibitors
Aluminum
corrosion
inhibitor
aluminum
Corrosion
Electrochemical impedance spectroscopy
acid
adsorption
Adsorption
polarization
Potentiodynamic polarization
spectroscopy
corrosion control
Adsorption isotherms
Extrapolation
Surface morphology
Seed
Energy dispersive spectroscopy

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology

Cite this

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title = "Coriandrum sativum L. - A novel green inhibitor for the corrosion inhibition of aluminium in 1.0 M phosphoric acid solution",
abstract = "The corrosion inhibition characteristics of aqueous extract of seeds of Coriandrum sativum L. (CSE) have been studied as an eco-friendly green inhibitor for corrosion control of aluminium in 1.0 M phosphoric acid solution using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The effects of inhibitor concentration and temperature on the inhibition action were investigated. The adsorption of CSE on metal surface obeyed Langmuir adsorption isotherm. Polarization measurements showed that the CSE acted as mixed inhibitor in 0.5 M and 2.0 M phosphoric acid solution and the inhibitor molecules followed physical adsorption on the surface of aluminium. The surface morphology of aluminium, in the absence and presence of CSE in 1.0 M phosphoric acid solution, was studied using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Results obtained from Tafel extrapolation and A.C electrochemical impedance spectroscopy (EIS) techniques were in good agreement.",
author = "Deepa Prabhu and Padmalatha Rao",
year = "2013",
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pages = "676--683",
journal = "Journal of Environmental Chemical Engineering",
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publisher = "Elsevier BV",
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T1 - Coriandrum sativum L. - A novel green inhibitor for the corrosion inhibition of aluminium in 1.0 M phosphoric acid solution

AU - Prabhu, Deepa

AU - Rao, Padmalatha

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N2 - The corrosion inhibition characteristics of aqueous extract of seeds of Coriandrum sativum L. (CSE) have been studied as an eco-friendly green inhibitor for corrosion control of aluminium in 1.0 M phosphoric acid solution using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The effects of inhibitor concentration and temperature on the inhibition action were investigated. The adsorption of CSE on metal surface obeyed Langmuir adsorption isotherm. Polarization measurements showed that the CSE acted as mixed inhibitor in 0.5 M and 2.0 M phosphoric acid solution and the inhibitor molecules followed physical adsorption on the surface of aluminium. The surface morphology of aluminium, in the absence and presence of CSE in 1.0 M phosphoric acid solution, was studied using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Results obtained from Tafel extrapolation and A.C electrochemical impedance spectroscopy (EIS) techniques were in good agreement.

AB - The corrosion inhibition characteristics of aqueous extract of seeds of Coriandrum sativum L. (CSE) have been studied as an eco-friendly green inhibitor for corrosion control of aluminium in 1.0 M phosphoric acid solution using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The effects of inhibitor concentration and temperature on the inhibition action were investigated. The adsorption of CSE on metal surface obeyed Langmuir adsorption isotherm. Polarization measurements showed that the CSE acted as mixed inhibitor in 0.5 M and 2.0 M phosphoric acid solution and the inhibitor molecules followed physical adsorption on the surface of aluminium. The surface morphology of aluminium, in the absence and presence of CSE in 1.0 M phosphoric acid solution, was studied using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Results obtained from Tafel extrapolation and A.C electrochemical impedance spectroscopy (EIS) techniques were in good agreement.

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