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Impedance study on Mg Sacrificial anode for soil corrosion protection

Sacrificial anode is one of the methods that usually applied in soil corrosion protection especially magnesium (Mg) based anode. This study is focuses on high-potential Mg anode and pure Mg anode. The value of open-circuit potential for as-received high-potential Mg anode, as-cast high-potential Mg...

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Main Author: Zulkifli Zainon
Other Authors: Mohd Nazree Derman, Dr (Advisor)
Format: Learning Object
Language:English
Published: Universiti Malaysia Perlis 2008
Subjects:
Magnesium anode
Corrosions
Corrosions > Prevention
Soil corrosion
Anodes
Corrosion protection
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/3482
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spelling my.unimap-34822008-12-12T03:37:16Z Impedance study on Mg Sacrificial anode for soil corrosion protection Zulkifli Zainon Mohd Nazree Derman, Dr (Advisor) Magnesium anode Corrosions Corrosions -- Prevention Soil corrosion Anodes Corrosion protection Sacrificial anode is one of the methods that usually applied in soil corrosion protection especially magnesium (Mg) based anode. This study is focuses on high-potential Mg anode and pure Mg anode. The value of open-circuit potential for as-received high-potential Mg anode, as-cast high-potential Mg anode and pure Mg anode are -1679, -1546 and -1709 mV vs SCE respectively. The corrosion rate and corrosion current density exhibits the significantly different between Mg anodes. The highest corrosion rate and corrosion current density was achieved by as-cast high-potential Mg anode (25.7754 µm/year, 1.02 A/cm2), followed by as-received high-potential Mg anode (4.1476 µm/year, 0.158 A/cm2) and pure Mg anode (2.3985 µm/year, 0.105 A/cm2) respectively. The different of the electrochemical properties were believed resulted by the presence of alloying element and different process among the samples. Electrochemical impedance spectroscopy study shows the large resistance resulted by high passive properties of as-cast high-potential Mg anode. This occurrence is at high solution and polarization resistance condition due to the existence of passive layer on sample surface. The presence of oxide passive layer results the flow of electron was prevented. A heterogeneous structure of surface layer on as-received high-potential Mg anode shows resistance properties in small value with low passivity thus increased the electron flow and transfer on it surface. 2008-12-12T03:37:16Z 2008-12-12T03:37:16Z 2008-05 Learning Object http://hdl.handle.net/123456789/3482 en Universiti Malaysia Perlis Schools of Materials Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Magnesium anode
Corrosions
Corrosions -- Prevention
Soil corrosion
Anodes
Corrosion protection
spellingShingle Magnesium anode
Corrosions
Corrosions -- Prevention
Soil corrosion
Anodes
Corrosion protection
Zulkifli Zainon
Impedance study on Mg Sacrificial anode for soil corrosion protection
description Sacrificial anode is one of the methods that usually applied in soil corrosion protection especially magnesium (Mg) based anode. This study is focuses on high-potential Mg anode and pure Mg anode. The value of open-circuit potential for as-received high-potential Mg anode, as-cast high-potential Mg anode and pure Mg anode are -1679, -1546 and -1709 mV vs SCE respectively. The corrosion rate and corrosion current density exhibits the significantly different between Mg anodes. The highest corrosion rate and corrosion current density was achieved by as-cast high-potential Mg anode (25.7754 µm/year, 1.02 A/cm2), followed by as-received high-potential Mg anode (4.1476 µm/year, 0.158 A/cm2) and pure Mg anode (2.3985 µm/year, 0.105 A/cm2) respectively. The different of the electrochemical properties were believed resulted by the presence of alloying element and different process among the samples. Electrochemical impedance spectroscopy study shows the large resistance resulted by high passive properties of as-cast high-potential Mg anode. This occurrence is at high solution and polarization resistance condition due to the existence of passive layer on sample surface. The presence of oxide passive layer results the flow of electron was prevented. A heterogeneous structure of surface layer on as-received high-potential Mg anode shows resistance properties in small value with low passivity thus increased the electron flow and transfer on it surface.
author2 Mohd Nazree Derman, Dr (Advisor)
author_facet Mohd Nazree Derman, Dr (Advisor)
Zulkifli Zainon
format Learning Object
author Zulkifli Zainon
author_sort Zulkifli Zainon
title Impedance study on Mg Sacrificial anode for soil corrosion protection
title_short Impedance study on Mg Sacrificial anode for soil corrosion protection
title_full Impedance study on Mg Sacrificial anode for soil corrosion protection
title_fullStr Impedance study on Mg Sacrificial anode for soil corrosion protection
title_full_unstemmed Impedance study on Mg Sacrificial anode for soil corrosion protection
title_sort impedance study on mg sacrificial anode for soil corrosion protection
publisher Universiti Malaysia Perlis
publishDate 2008
url http://dspace.unimap.edu.my/xmlui/handle/123456789/3482
_version_ 1643787905226768384
score 13.222552

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