Surface modification of graphene oxide by D glucose in epoxy resin composites for anticorrosive coating / Nurul Anis Athirah Ab Aziz

Nurul Anis Athirah , Ab Aziz (2023) Surface modification of graphene oxide by D glucose in epoxy resin composites for anticorrosive coating / Nurul Anis Athirah Ab Aziz. Masters thesis, Universiti Malaya.

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Abstract

Corrosion is induced by the natural propensity of many steel ions to convert into oxidized forms. It affects our daily lives both directly and indirectly. In order to overcome this problem, one of the most appropriate strategies for minimizing corrosion activity is the use of an organic coating. In the current work, graphene oxide (GO) was transformed using a natural chemical of D-glucose (D-g), by implementing an environmental technique wherein distilled water was applied as a solvent all along the investigation. In order to explore the development of modified GO (m-GO), a significant weight loss may be detected at 100 °C, which the breakage of oxygen-containing groups might characterize. Epoxy coating's barrier was greatly strengthened by introducing D-g and GO particles. 0.25 M of EP has the most negligible thermal degradation, exhibiting minimal weight loss. The 0.7% m-GO/EP composite demonstrated an exceptional barrier and enhanced active corrosion prevention for up to 120 hours. Hence, the 0.1% and 0.7% m-GO/EP coatings have a bigger arc after 42 days, demonstrating that they have strong anticorrosion characteristics even in a highly corrosive environment. The D-g/GO composite significantly altered the layers’ corrosion protection performance due to the additions of EP and graphene. According to the morphological observation, uncoated steel looks to have the greatest corrosion on the steel surface as water may enter readily into the uncoated surface steel. In addition, the pure EP coating has the highest anticorrosion performance and a smooth surface. This research demonstrates the excellent performance of the anticorrosive properties of GO/EP for anticorrosion coatings.

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