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The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media

The inhibition effect of mangrove tannin (MgT), mimosa tannin (MmT) and chestnut tannin (CnT) on the corrosion behaviour of mild steel in 0.5 M HCl, 0.25 M H2SO4 and 3.5 % NaCl solutions was studied using weight loss, potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) tech...

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Main Author: Adam, Mohd Ridhwan
Format: Thesis
Language:English
Published: 2014
Subjects:
TP1-1185 Chemical technology
Online Access:http://eprints.usm.my/46299/1/Mohd%20Ridhwan%20Adam24.pdf
http://eprints.usm.my/46299/
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spelling my.usm.eprints.46299 http://eprints.usm.my/46299/ The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media Adam, Mohd Ridhwan TP1-1185 Chemical technology The inhibition effect of mangrove tannin (MgT), mimosa tannin (MmT) and chestnut tannin (CnT) on the corrosion behaviour of mild steel in 0.5 M HCl, 0.25 M H2SO4 and 3.5 % NaCl solutions was studied using weight loss, potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) techniques. The results from all techniques studied showed that MgT gave satisfactory inhibition efficiencies on mild steel. The performance of MgT was further enhanced when iodide ions were added into the corrosive media containing this inhibitor, indicating the occurrence of synergism between these two compounds. In the weight loss analyses, the inhibition efficiencies for all three tannins have been increased from 38-85 % to 82-97 % when iodide ions were introduced into the corrosive media containing these inhibitors. The inhibition efficiencies for all three tannins were enhanced from 47-89 % to 83-94 % when combined with iodide ions in the potentiodynamic polarisation measurements. In the EIS measurements, the inhibition efficiencies for all three tannins were further increased from 69-84 % to 80-92 % when these tannins were synergised by the iodide ions. The inhibition efficiencies obtained from the weight loss and electrochemical measurements were in good agreement. Potentiodynamic polarisation studies clearly revealed that MgT behaved as mixed-type inhibitor with predominant anodic effectiveness. The Nyquist plots obtained from the EIS analyses showed that the inhibition process was mainly controlled by a charge transfer process. 2014-02 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/46299/1/Mohd%20Ridhwan%20Adam24.pdf Adam, Mohd Ridhwan (2014) The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media. Masters thesis, Universiti Sains Malaysia.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic TP1-1185 Chemical technology
spellingShingle TP1-1185 Chemical technology
Adam, Mohd Ridhwan
The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media
description The inhibition effect of mangrove tannin (MgT), mimosa tannin (MmT) and chestnut tannin (CnT) on the corrosion behaviour of mild steel in 0.5 M HCl, 0.25 M H2SO4 and 3.5 % NaCl solutions was studied using weight loss, potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) techniques. The results from all techniques studied showed that MgT gave satisfactory inhibition efficiencies on mild steel. The performance of MgT was further enhanced when iodide ions were added into the corrosive media containing this inhibitor, indicating the occurrence of synergism between these two compounds. In the weight loss analyses, the inhibition efficiencies for all three tannins have been increased from 38-85 % to 82-97 % when iodide ions were introduced into the corrosive media containing these inhibitors. The inhibition efficiencies for all three tannins were enhanced from 47-89 % to 83-94 % when combined with iodide ions in the potentiodynamic polarisation measurements. In the EIS measurements, the inhibition efficiencies for all three tannins were further increased from 69-84 % to 80-92 % when these tannins were synergised by the iodide ions. The inhibition efficiencies obtained from the weight loss and electrochemical measurements were in good agreement. Potentiodynamic polarisation studies clearly revealed that MgT behaved as mixed-type inhibitor with predominant anodic effectiveness. The Nyquist plots obtained from the EIS analyses showed that the inhibition process was mainly controlled by a charge transfer process.
format Thesis
author Adam, Mohd Ridhwan
author_facet Adam, Mohd Ridhwan
author_sort Adam, Mohd Ridhwan
title The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media
title_short The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media
title_full The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media
title_fullStr The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media
title_full_unstemmed The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media
title_sort synergistic effect of tannins and iodide ions on the corrosion inhibition of mild steel in corrosive media
publishDate 2014
url http://eprints.usm.my/46299/1/Mohd%20Ridhwan%20Adam24.pdf
http://eprints.usm.my/46299/
_version_ 1662755765655437312
score 13.211869

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