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Role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method

Much research on magnesium (Mg) emphasises creating good corrosion resistance of magnesium, due to its high reactivity in most environments. In this study, powder metallurgy (PM) technique is used to produce Mg samples with a variation of aluminium (Al) composition. The effect of aluminium compositi...

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Main Author: Juliawati, Alias
Format: Article
Language:English
Published: Universiti Malaysia Pahang 2020
Subjects:
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
Online Access:http://umpir.ump.edu.my/id/eprint/29670/1/Role%20of%20aluminium%20on%20the%20microstructure%20and%20corrosion.pdf
http://umpir.ump.edu.my/id/eprint/29670/
https://doi.org/10.15282/ijame.17.3.2020.14.0618
https://doi.org/10.15282/ijame.17.3.2020.14.0618
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spelling my.ump.umpir.296702020-11-19T01:52:19Z http://umpir.ump.edu.my/id/eprint/29670/ Role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method Juliawati, Alias TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery Much research on magnesium (Mg) emphasises creating good corrosion resistance of magnesium, due to its high reactivity in most environments. In this study, powder metallurgy (PM) technique is used to produce Mg samples with a variation of aluminium (Al) composition. The effect of aluminium composition on the microstructure development, including the phase analysis was characterised by optical microscope (OM), scanning electron microscopy (SEM) and x-ray diffraction (XRD). The mechanical property of Mg sample was performed through Vickers microhardness. The results showed that the addition of aluminium in the synthesised Mg sample formed distribution of Al-rich phases of Mg17Al12, with 50 wt.% of aluminium content in the Mg sample exhibited larger fraction and distribution of Al-rich phases as compared to the 20 wt.% and 10 wt.% of aluminium content. The microhardness values were also increased at 20 wt.% and 50 wt.% of aluminium content, comparable to the standard microhardness value of the annealed Mg. A similar trend in corrosion resistance of the Mg immersed in 3.5 wt.% NaCl solution was observed. The corrosion behaviour was evaluated based on potentiodynamic polarisation behaviour. The corrosion current density, icorr, is observed to decrease with the increase of Al composition in the Mg sample, corresponding to the increase in corrosion resistance due to the formation of aluminium oxide layer on the Al-rich surface that acted as the corrosion barrier. Overall, the inclusion of aluminium in this study demonstrates the promising development of high corrosion resistant Mg alloys. Universiti Malaysia Pahang 2020-10-13 Article PeerReviewed pdf en cc_by_nc_4 http://umpir.ump.edu.my/id/eprint/29670/1/Role%20of%20aluminium%20on%20the%20microstructure%20and%20corrosion.pdf Juliawati, Alias (2020) Role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method. International Journal of Automotive and Mechanical Engineering (IJAME), 17 (3). pp. 1-8. ISSN 2229-8649 (Print); 2180-1606 (Online) https://doi.org/10.15282/ijame.17.3.2020.14.0618 https://doi.org/10.15282/ijame.17.3.2020.14.0618
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
spellingShingle TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
Juliawati, Alias
Role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method
description Much research on magnesium (Mg) emphasises creating good corrosion resistance of magnesium, due to its high reactivity in most environments. In this study, powder metallurgy (PM) technique is used to produce Mg samples with a variation of aluminium (Al) composition. The effect of aluminium composition on the microstructure development, including the phase analysis was characterised by optical microscope (OM), scanning electron microscopy (SEM) and x-ray diffraction (XRD). The mechanical property of Mg sample was performed through Vickers microhardness. The results showed that the addition of aluminium in the synthesised Mg sample formed distribution of Al-rich phases of Mg17Al12, with 50 wt.% of aluminium content in the Mg sample exhibited larger fraction and distribution of Al-rich phases as compared to the 20 wt.% and 10 wt.% of aluminium content. The microhardness values were also increased at 20 wt.% and 50 wt.% of aluminium content, comparable to the standard microhardness value of the annealed Mg. A similar trend in corrosion resistance of the Mg immersed in 3.5 wt.% NaCl solution was observed. The corrosion behaviour was evaluated based on potentiodynamic polarisation behaviour. The corrosion current density, icorr, is observed to decrease with the increase of Al composition in the Mg sample, corresponding to the increase in corrosion resistance due to the formation of aluminium oxide layer on the Al-rich surface that acted as the corrosion barrier. Overall, the inclusion of aluminium in this study demonstrates the promising development of high corrosion resistant Mg alloys.
format Article
author Juliawati, Alias
author_facet Juliawati, Alias
author_sort Juliawati, Alias
title Role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method
title_short Role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method
title_full Role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method
title_fullStr Role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method
title_full_unstemmed Role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method
title_sort role of aluminium on the microstructure and corrosion behaviour of magnesium prepared by powder metallurgy method
publisher Universiti Malaysia Pahang
publishDate 2020
url http://umpir.ump.edu.my/id/eprint/29670/1/Role%20of%20aluminium%20on%20the%20microstructure%20and%20corrosion.pdf
http://umpir.ump.edu.my/id/eprint/29670/
https://doi.org/10.15282/ijame.17.3.2020.14.0618
https://doi.org/10.15282/ijame.17.3.2020.14.0618
_version_ 1684653576092123136
score 13.211869

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