Electrochemical Study on Corrosion Inhibition of Copper in Hydrochloric Acid Medium and the Rotating Ring-Disc Voltammetry for Studying the Dissolution
Dissolution characteristics of copper in hydrochloric acid medium and the effect of 4-amino 1,2,4-triazole (ATA) on the corrosion process have been studied using conventional electrochemical techniques and rotating ring-disc electrodes (RRDEs). Corrosion potential (𝐸corr) and corrosion current densi...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2011-01-01
|
Series: | International Journal of Electrochemistry |
Online Access: | http://dx.doi.org/10.4061/2011/173462 |
id |
doaj-51d0a959ebd94776abb0490796a823a3 |
---|---|
record_format |
Article |
spelling |
doaj-51d0a959ebd94776abb0490796a823a32020-11-24T22:29:40ZengHindawi LimitedInternational Journal of Electrochemistry2090-35372011-01-01201110.4061/2011/173462173462Electrochemical Study on Corrosion Inhibition of Copper in Hydrochloric Acid Medium and the Rotating Ring-Disc Voltammetry for Studying the DissolutionA. K. Satpati0A. V. R. Reddy1Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, IndiaAnalytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, IndiaDissolution characteristics of copper in hydrochloric acid medium and the effect of 4-amino 1,2,4-triazole (ATA) on the corrosion process have been studied using conventional electrochemical techniques and rotating ring-disc electrodes (RRDEs). Corrosion potential (𝐸corr) and corrosion current density (𝐼corr) were obtained by Tafel extrapolation methods. Charge transfer resistance (𝑅ct) and double-layer capacitance (𝐶dl) were obtained from the electrochemical impedance spectroscopy (EIS). ATA was shown to be an effective inhibitor for the copper-corrosion inhibition in acid medium. The corrosion rate was retarded in presence of inhibitors mainly because of the adsorption of the inhibitor on the electrode surface. Adsorption of the inhibitor on the metal surface was found to follow the Langmuir adsorption isotherm. Standard free energy change of the adsorption process (Δ𝐺0ad) was calculated to be −54.3 kJ mol−1; such a large negative value of Δ𝐺0ad suggests the prescence of a chemisorption process.http://dx.doi.org/10.4061/2011/173462 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. K. Satpati A. V. R. Reddy |
spellingShingle |
A. K. Satpati A. V. R. Reddy Electrochemical Study on Corrosion Inhibition of Copper in Hydrochloric Acid Medium and the Rotating Ring-Disc Voltammetry for Studying the Dissolution International Journal of Electrochemistry |
author_facet |
A. K. Satpati A. V. R. Reddy |
author_sort |
A. K. Satpati |
title |
Electrochemical Study on Corrosion Inhibition of Copper in Hydrochloric Acid Medium and the Rotating Ring-Disc Voltammetry for Studying the Dissolution |
title_short |
Electrochemical Study on Corrosion Inhibition of Copper in Hydrochloric Acid Medium and the Rotating Ring-Disc Voltammetry for Studying the Dissolution |
title_full |
Electrochemical Study on Corrosion Inhibition of Copper in Hydrochloric Acid Medium and the Rotating Ring-Disc Voltammetry for Studying the Dissolution |
title_fullStr |
Electrochemical Study on Corrosion Inhibition of Copper in Hydrochloric Acid Medium and the Rotating Ring-Disc Voltammetry for Studying the Dissolution |
title_full_unstemmed |
Electrochemical Study on Corrosion Inhibition of Copper in Hydrochloric Acid Medium and the Rotating Ring-Disc Voltammetry for Studying the Dissolution |
title_sort |
electrochemical study on corrosion inhibition of copper in hydrochloric acid medium and the rotating ring-disc voltammetry for studying the dissolution |
publisher |
Hindawi Limited |
series |
International Journal of Electrochemistry |
issn |
2090-3537 |
publishDate |
2011-01-01 |
description |
Dissolution characteristics of copper in hydrochloric acid medium and the effect of 4-amino 1,2,4-triazole (ATA) on the corrosion process have been studied using conventional electrochemical techniques and rotating ring-disc electrodes (RRDEs). Corrosion potential (𝐸corr) and corrosion current density (𝐼corr) were obtained by Tafel extrapolation methods. Charge transfer resistance (𝑅ct) and double-layer capacitance (𝐶dl) were obtained from the electrochemical impedance spectroscopy (EIS). ATA was shown to be an effective inhibitor for the copper-corrosion inhibition in acid medium. The corrosion rate was retarded in presence of inhibitors mainly because of the adsorption of the inhibitor on the electrode surface. Adsorption of the inhibitor on the metal surface was found to follow the Langmuir adsorption isotherm. Standard free energy change of the adsorption process (Δ𝐺0ad) was calculated to be −54.3 kJ mol−1; such a large negative value of Δ𝐺0ad suggests the prescence of a chemisorption process. |
url |
http://dx.doi.org/10.4061/2011/173462 |
work_keys_str_mv |
AT aksatpati electrochemicalstudyoncorrosioninhibitionofcopperinhydrochloricacidmediumandtherotatingringdiscvoltammetryforstudyingthedissolution AT avrreddy electrochemicalstudyoncorrosioninhibitionofcopperinhydrochloricacidmediumandtherotatingringdiscvoltammetryforstudyingthedissolution |
_version_ |
1725743648090357760 |