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
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spelling	my-usm-ep.462992020-02-21T02:01:02Z The Synergistic Effect Of Tannins And Iodide Ions On The Corrosion Inhibition Of Mild Steel In Corrosive Media 2014-02 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 http://eprints.usm.my/46299/ http://eprints.usm.my/46299/1/Mohd%20Ridhwan%20Adam24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
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
qualification_level	Master's degree
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
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2014
url	http://eprints.usm.my/46299/1/Mohd%20Ridhwan%20Adam24.pdf
_version_	1747821647802400768

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

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