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Self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of Magnesium (Mg)

The ability to self-heal is an important feature for the long-term durability of protective coatings on metal alloys. Microcapsules in the self-healing coating allowed for automatic recovery of any damages or cracks, extending the life of the coating. In this study, self-healing microcapsules contai...

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Main Authors: Juliawati, Alias, N. A., Johari, A., Zanurin, Nasrul Azuan, Alang, M. Z. M., Zain
Format: Conference or Workshop Item
Language:English
Published: IOP Publishing 2021
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://umpir.ump.edu.my/id/eprint/33625/1/Self%20healing%20epoxy%20coating%20with%20microencapsulation_FULL.pdf
http://umpir.ump.edu.my/id/eprint/33625/
https://doi.org/10.1088/1742-6596/2129/1/012008
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spelling my.ump.umpir.336252024-07-19T07:57:44Z http://umpir.ump.edu.my/id/eprint/33625/ Self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of Magnesium (Mg) Juliawati, Alias N. A., Johari A., Zanurin Nasrul Azuan, Alang M. Z. M., Zain TJ Mechanical engineering and machinery The ability to self-heal is an important feature for the long-term durability of protective coatings on metal alloys. Microcapsules in the self-healing coating allowed for automatic recovery of any damages or cracks, extending the life of the coating. In this study, self-healing microcapsules containing linseed oil as the core material and polyurea-formaldehyde (PUF) as the shell material were manufactured to epoxy resin matrix. Coatings were applied to a bare magnesium (Mg) substrate and scratched to test the self-healing ability. Optical and scanning electron microscopy (SEM) were used to characterize the microcapsules formed by varied stirring rates of 300 and 800 rpm. By using potentiodynamic polarization in a 3.5 wt.% NaCl solution, the corrosion rate of embedded microcapsules and coatings on Mg was evaluated, and the corrosion rate was studied using the Tafel plot. As a consequence, the epoxy coating containing linseed oil and urea formaldehyde, stirred at 800 rpm, significantly resists corrosion attack on the magnesium sheet, with decreased corrosion current density, icorr (1.552 μA/cm2) as compared to the bare magnesium sheet (109.8 μA/cm2). During the microcapsule preparation, increasing the stirring rate from 300 to 800 rpm reduces the icorr value by roughly half. As a result, the self-healing coatings demonstrated adequate self-healing and corrosion resistance recovery on magnesium alloys. IOP Publishing 2021 Conference or Workshop Item PeerReviewed pdf en cc_by http://umpir.ump.edu.my/id/eprint/33625/1/Self%20healing%20epoxy%20coating%20with%20microencapsulation_FULL.pdf Juliawati, Alias and N. A., Johari and A., Zanurin and Nasrul Azuan, Alang and M. Z. M., Zain (2021) Self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of Magnesium (Mg). In: Journal of Physics: Conference Series. Journal of Physics: Conference Series; 1st International Conference on Material Processing and Technology, ICMProTech 2021 , 14 - 15 July 2021 , Perlis, Virtual. pp. 1-9., 2129 (0120081st). ISBN 1742-6588 (Published) https://doi.org/10.1088/1742-6596/2129/1/012008
institution Universiti Malaysia Pahang Al-Sultan Abdullah
building UMPSA Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang Al-Sultan Abdullah
content_source UMPSA Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Juliawati, Alias
N. A., Johari
A., Zanurin
Nasrul Azuan, Alang
M. Z. M., Zain
Self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of Magnesium (Mg)
description The ability to self-heal is an important feature for the long-term durability of protective coatings on metal alloys. Microcapsules in the self-healing coating allowed for automatic recovery of any damages or cracks, extending the life of the coating. In this study, self-healing microcapsules containing linseed oil as the core material and polyurea-formaldehyde (PUF) as the shell material were manufactured to epoxy resin matrix. Coatings were applied to a bare magnesium (Mg) substrate and scratched to test the self-healing ability. Optical and scanning electron microscopy (SEM) were used to characterize the microcapsules formed by varied stirring rates of 300 and 800 rpm. By using potentiodynamic polarization in a 3.5 wt.% NaCl solution, the corrosion rate of embedded microcapsules and coatings on Mg was evaluated, and the corrosion rate was studied using the Tafel plot. As a consequence, the epoxy coating containing linseed oil and urea formaldehyde, stirred at 800 rpm, significantly resists corrosion attack on the magnesium sheet, with decreased corrosion current density, icorr (1.552 μA/cm2) as compared to the bare magnesium sheet (109.8 μA/cm2). During the microcapsule preparation, increasing the stirring rate from 300 to 800 rpm reduces the icorr value by roughly half. As a result, the self-healing coatings demonstrated adequate self-healing and corrosion resistance recovery on magnesium alloys.
format Conference or Workshop Item
author Juliawati, Alias
N. A., Johari
A., Zanurin
Nasrul Azuan, Alang
M. Z. M., Zain
author_facet Juliawati, Alias
N. A., Johari
A., Zanurin
Nasrul Azuan, Alang
M. Z. M., Zain
author_sort Juliawati, Alias
title Self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of Magnesium (Mg)
title_short Self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of Magnesium (Mg)
title_full Self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of Magnesium (Mg)
title_fullStr Self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of Magnesium (Mg)
title_full_unstemmed Self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of Magnesium (Mg)
title_sort self-healing epoxy coating with microencapsulation of linseed oil for the corrosion protection of magnesium (mg)
publisher IOP Publishing
publishDate 2021
url http://umpir.ump.edu.my/id/eprint/33625/1/Self%20healing%20epoxy%20coating%20with%20microencapsulation_FULL.pdf
http://umpir.ump.edu.my/id/eprint/33625/
https://doi.org/10.1088/1742-6596/2129/1/012008
_version_ 1822924484207706112
score 13.235362

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