Corrosion protection performance of nanocomposite coatings under static, UV, and dynamic conditions

Basiru, Y.A. and Ammar, Sh. and Ramesh, Kasi and Vengadaesvaran, B. and Ramesh, Subramaniam and Arof, Abdul Kariem (2018) Corrosion protection performance of nanocomposite coatings under static, UV, and dynamic conditions. Journal of Coatings Technology and Research, 15 (5). pp. 1035-1047. ISSN 1547-0091, DOI

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Silicone-modified epoxy polymeric matrix was successfully fabricated and reinforced with 1–2 wt% SiO2, TiO2, and TiSiO4 nanoparticles. Fourier-transform infrared spectroscopy, contact angle measurements, differential scanning calorimetry, and field-emission scanning electron microscopy together with energy-dispersive X-ray spectroscopy were employed to investigate different characteristics of the prepared coatings. To simulate operating conditions, all samples were characterized via electrochemical impedance spectroscopy (EIS) after being subjected to different conditions. Corrosion under static conditions, in which the samples were exposed to a static electrolyte without further change in other parameters, was investigated. Furthermore, to study the effects of ultraviolet (UV) radiation in accelerating the degradation of the coatings, samples were characterized after being subjected to UV while immersed statically in the electrolyte. Additionally, the corrosion protection performance was investigated after subjecting the coated substrates to dynamic conditions involving continuous movement of the sample in the electrolyte, simulating continuous wear of the coated surfaces. Compared with the static condition, the EIS results revealed the vital role of the silicone resin and nanoparticles in improving the stability of the coating film against corrosion degradation in the presence of UV radiation, while poor performance in dynamic condition was recorded for all the coating systems.

Item Type: Article
Funders: University of Malaya: Research Grants BKS027–2017, PG011-2015B, PG001–2016A, and PG059-2016A
Uncontrolled Keywords: Dynamic corrosion; EIS; Nanocomposites; Organic coatings; UV degradation
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 13 Sep 2019 06:32
Last Modified: 13 Sep 2019 06:32

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