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
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Abstract
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.
| Item Type: | Conference or Workshop Item (Lecture) |
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| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Polyurea-Formaldehyde (PUF); Magnesium (Mg); Scanning Electron Microscopy (SEM) |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Faculty/Division: | Faculty of Mechanical Engineering Institute of Postgraduate Studies Faculty of Mechanical and Automotive Engineering Technology |
| Depositing User: | Pn. Hazlinda Abd Rahman |
| Date Deposited: | 19 Jul 2024 07:57 |
| Last Modified: | 19 Jul 2024 07:57 |
| URI: | http://umpir.ump.edu.my/id/eprint/33625 |
| Download Statistic: | View Download Statistics |
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