izvorni znanstveni rad
Organic coatings are the most common method used to protect metals from corrosion. In practice, there is a constant need to extend the protection life as well as to achieve some additional properties, such as better mechanical, chemical, and antimicrobial properties. Nanocomposite coatings are designed to provide effective and functional solutions for different challenging environments. Graphene oxide (GO) is a two-dimensional carbon nanomaterial known for its exceptional mechanical strength, chemical, and thermal stability. With its adjustable and functionalized surface, excellent processing capabilities, and potential for competitive and scalable production, GO has emerged as a promising material for barrier applications. It can be incorporated into epoxy coatings as fillers to increase the tortuous diffusion path of corrosive medium within coatings. In this study, epoxy coatings incorporating GO and Al NPs, as well as modified GO (Al NPs-GO) with different material weight proportions, were prepared to investigate anti-corrosion and antibacterial properties for grey cast iron. It has been established that adding aluminium nanoparticles and graphene oxide to an epoxy coating improves its resistance to electrochemical corrosion. Additionally, it has been found that the epoxy coating acquires new antibacterial properties, giving it dual functionality. The effect of corrosion protection performance of nanocomposite was analysed using scanning electrochemical microscopy (SECM) and electrochemical impedance spectroscopy (EIS), while the evaluation of the bacterial biofilm inhibition was determined by crystal violet staining. In this paper, it has been proven that nanocomposites improve mechanical, anticorrosive and antimicrobial properties, provide better resistance to external mechanical influences and effectively prevent corrosion and bacterial growth.
corrosion protection; antibacterial activity; epoxy coating; aluminium nanoparticles; graphene oxide
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