Ecofriendly biopolymer as green inhibitor for corrosion control of 6061-aluminium alloy in hydrochloric acid medium

B. P. Charitha, Padmalatha Rao

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The influence of biopolymer starch as an ecofriendly green inhibitor to control the corrosion of 6061 aluminum alloy in 0.25M Hydrochloric acid solution was studied by using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The percentage inhibition efficiency was found to increase with increase in the temperature (30 to 50ºC) and as well as with increase in the concentration (100 to 800ppm) of the inhibitor. The kinetic and thermodynamic studies showed that starch underwent chemisorption by obeying Langmuir adsorption isotherm. The surface morphology studies were done by SEX-EDX analysis. This supported the adsorption of the inhibitor molecule on the metal surface. Results obtained by both the methods were in good agreement with one another.

Original languageEnglish
Pages (from-to)330-342
Number of pages13
JournalInternational Journal of ChemTech Research
Volume8
Issue number11
Publication statusPublished - 2015

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Biopolymers
Hydrochloric Acid
Corrosion inhibitors
Hydrochloric acid
Starch
Aluminum alloys
Corrosion
Potentiodynamic polarization
Chemisorption
Electrochemical impedance spectroscopy
Adsorption isotherms
Surface morphology
Energy dispersive spectroscopy
Metals
Thermodynamics
Adsorption
Molecules
Kinetics
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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abstract = "The influence of biopolymer starch as an ecofriendly green inhibitor to control the corrosion of 6061 aluminum alloy in 0.25M Hydrochloric acid solution was studied by using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The percentage inhibition efficiency was found to increase with increase in the temperature (30 to 50ºC) and as well as with increase in the concentration (100 to 800ppm) of the inhibitor. The kinetic and thermodynamic studies showed that starch underwent chemisorption by obeying Langmuir adsorption isotherm. The surface morphology studies were done by SEX-EDX analysis. This supported the adsorption of the inhibitor molecule on the metal surface. Results obtained by both the methods were in good agreement with one another.",
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AU - Rao, Padmalatha

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N2 - The influence of biopolymer starch as an ecofriendly green inhibitor to control the corrosion of 6061 aluminum alloy in 0.25M Hydrochloric acid solution was studied by using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The percentage inhibition efficiency was found to increase with increase in the temperature (30 to 50ºC) and as well as with increase in the concentration (100 to 800ppm) of the inhibitor. The kinetic and thermodynamic studies showed that starch underwent chemisorption by obeying Langmuir adsorption isotherm. The surface morphology studies were done by SEX-EDX analysis. This supported the adsorption of the inhibitor molecule on the metal surface. Results obtained by both the methods were in good agreement with one another.

AB - The influence of biopolymer starch as an ecofriendly green inhibitor to control the corrosion of 6061 aluminum alloy in 0.25M Hydrochloric acid solution was studied by using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The percentage inhibition efficiency was found to increase with increase in the temperature (30 to 50ºC) and as well as with increase in the concentration (100 to 800ppm) of the inhibitor. The kinetic and thermodynamic studies showed that starch underwent chemisorption by obeying Langmuir adsorption isotherm. The surface morphology studies were done by SEX-EDX analysis. This supported the adsorption of the inhibitor molecule on the metal surface. Results obtained by both the methods were in good agreement with one another.

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