Electrochemical behaviour of aluminum alloys in natural seawater

In natural seawater, pure aluminum develops oxide layer which forms a barrier, protecting against corrosion. Alloying with other elements prevents the development of oxide layer by introducing localized galvanic cells. Different aluminum alloys exhibit different electrochemical behavior. The scope o...

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Main Authors:	Ahmad, A., Yahya, Z., Daud, N.A.Q.M., Daud, M.
Published:	2018
Online Access:	http://dspace.uniten.edu.my/jspui/handle/123456789/9158

id	uniten-123456789-9158
recordtype	eprints
spelling	uniten-123456789-91582018-02-21T05:05:39Z Electrochemical behaviour of aluminum alloys in natural seawater Ahmad, A. Yahya, Z. Daud, N.A.Q.M. Daud, M. In natural seawater, pure aluminum develops oxide layer which forms a barrier, protecting against corrosion. Alloying with other elements prevents the development of oxide layer by introducing localized galvanic cells. Different aluminum alloys exhibit different electrochemical behavior. The scope of the project was to study the electrochemical behavior of different chemical composition of aluminum alloys in natural seawater. The significance of understanding the corrosion behavior of aluminum alloys is essential in the fabrication of sacrificial anodes to be used in cathodic protection in corrosion control. Aluminum alloys were fabricated using alloying elements Zn, Sn, Mg, Cu, Fe, and Si. Divided into two groups, samples of aluminum alloys in Group 1 contain same weight percent of Zn, and different weight percent of Sn. Aluminum alloy samples in Group 2 contains same weight percent of Mg, Cu, Fe and Si with different weight percent of Sn. The samples were then subjected to corrosion behavior experimentation which includes Tafel plot, corrosion potential and potentiodynamic scan. It was found that alloying with Mg, Cu, Fe, and Si instead of alloying only with Zn and Sn further increases the negative potential, the density of particle distribution and further reduces the corrosion rate of aluminum alloys. The activeness of aluminum alloys also increases when alloyed with Zn, Sn, Mg, Cu, Fe, and Si. ©2009 IEEE. 2018-02-21T05:05:39Z 2018-02-21T05:05:39Z 2009 http://dspace.uniten.edu.my/jspui/handle/123456789/9158
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Tenaga Nasional
building	UNITEN Institutional Repository
collection	Online Access
description	In natural seawater, pure aluminum develops oxide layer which forms a barrier, protecting against corrosion. Alloying with other elements prevents the development of oxide layer by introducing localized galvanic cells. Different aluminum alloys exhibit different electrochemical behavior. The scope of the project was to study the electrochemical behavior of different chemical composition of aluminum alloys in natural seawater. The significance of understanding the corrosion behavior of aluminum alloys is essential in the fabrication of sacrificial anodes to be used in cathodic protection in corrosion control. Aluminum alloys were fabricated using alloying elements Zn, Sn, Mg, Cu, Fe, and Si. Divided into two groups, samples of aluminum alloys in Group 1 contain same weight percent of Zn, and different weight percent of Sn. Aluminum alloy samples in Group 2 contains same weight percent of Mg, Cu, Fe and Si with different weight percent of Sn. The samples were then subjected to corrosion behavior experimentation which includes Tafel plot, corrosion potential and potentiodynamic scan. It was found that alloying with Mg, Cu, Fe, and Si instead of alloying only with Zn and Sn further increases the negative potential, the density of particle distribution and further reduces the corrosion rate of aluminum alloys. The activeness of aluminum alloys also increases when alloyed with Zn, Sn, Mg, Cu, Fe, and Si. ©2009 IEEE.
author	Ahmad, A. Yahya, Z. Daud, N.A.Q.M. Daud, M.
spellingShingle	Ahmad, A. Yahya, Z. Daud, N.A.Q.M. Daud, M. Electrochemical behaviour of aluminum alloys in natural seawater
author_facet	Ahmad, A. Yahya, Z. Daud, N.A.Q.M. Daud, M.
author_sort	Ahmad, A.
title	Electrochemical behaviour of aluminum alloys in natural seawater
title_short	Electrochemical behaviour of aluminum alloys in natural seawater
title_full	Electrochemical behaviour of aluminum alloys in natural seawater
title_fullStr	Electrochemical behaviour of aluminum alloys in natural seawater
title_full_unstemmed	Electrochemical behaviour of aluminum alloys in natural seawater
title_sort	electrochemical behaviour of aluminum alloys in natural seawater
publishDate	2018
url	http://dspace.uniten.edu.my/jspui/handle/123456789/9158
first_indexed	2018-09-05T08:10:05Z
last_indexed	2018-09-05T08:10:05Z
_version_	1610754299572256768

Electrochemical behaviour of aluminum alloys in natural seawater

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