Impact of titanium and silicon metal oxide nanoparticles on surface coatings for marine vehicles to mitigate biofouling

Abstract

This work aimed to develop antifouling coatings for maritime structures and sailing vessels by the integration of nanoparticles as very effective biocidal agents. The paint compositions were created by combining several components with a binder known as linseed alkyd resin. The preparation of TiO2 and SiO2 nanoparticles was conducted by the ball milling technique, followed by their application as pigments in nano paints. The corrosion characteristics of these coatings were examined after the incorporation of the nano paint, to diminish fouling and enhance antibacterial efficacy on maritime vessels. The enhancement of antifouling paint efficacy is expected to be substantial as a result of the advancement in nanoparticle-based compositions that exhibit biocidal capabilities. To evaluate the efficacy of nanocoatings, miniature specimens were submerged in a marine environment for 120 days. The coated samples underwent analysis by various techniques including scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy and X-ray diffraction. Furthermore, an assessment was conducted to determine the efficacy of the protective characteristics exhibited by the coated tiny mild-steel samples. This evaluation involved subjecting the samples to a 120-day immersion in the ocean environment. The inclusion of SiO2 and TiO2 nanoparticles in the paints yields significant corrosion protection for the coated samples, in contrast to those lacking nanoparticles. Additionally, the latter exhibits superior anti-fouling properties.