Fabrication of Fe₃ O₄ @SiO₂ nanocomposites to enhance anticorrosion performance of epoxy coatings

Abstract

@SiO 2 ) nanocomposites were prepared by sol-gel method, and the anticorrosion performance of composite coatings was discussed. The structure of the Fe 3 O 4 @SiO 2 nanocomposites was verified through Fourier transform infrared, X-ray diffraction, and scanning electron microscopy. Composite epoxy coatings with same concentrations of Fe 3 O 4 and Fe 3 O 4 @SiO 2 were measured by scanning electron microscopy contact angle meter. More importantly, the Fe 3 O 4 @SiO 2 nanocomposites not only obtained a homogeneous dispersion and compatibility in epoxy resin but also exhibited an obvious superiority in enhancing the anticorrosion performance of epoxy coatings. Furthermore, the anticorrosion mechanism of Fe 3 O 4 @SiO 2 /epoxy composite coating was tentatively discussed.

Properties of nano-Fe3O4 incorporated epoxy coatings from Cure Index perspective

“…By the immersion time, the interface between the polymer and metal substrate undergoes cathodic delamination [29]. On the other hand, based on an experimental study done by Zhang et al [30], it was demonstrated that even at low concentration of Fe3O4 nanoparticles (1 wt.%) uniformly dispersed in the epoxy matrix an improved corrosion inhibition could be expected with respect to the blank epoxy coating (Fig. 7a).…”

Study of Nano-Alumina Impact on the Performance of a CaCO3-Epoxy Composite Coating

“…As the amount of nano alumina increases to 10%, the island structure becomes very dense, and nanoparticles can be well dispersed in the CaCO 3 -epoxy system, which indicated that the interaction between the layers of the CaCO 3epoxy matrix and nano-Al 2 O 3 was the best. Related studies have shown that the structure can well disperse stress, improve mechanical properties, extend the corrosive path, block the corrosive medium effectively and improve the corrosion-resistance properties [19][20]. However, as the content of nano-Al 2 O 3 increased to 15%, the Al 2 O 3 nanoparticles aggregated.…”

Enhanced tribological properties of bismaleimides with a novel hybrid silicon dioxide containing amino groups

“…In addition, nano-SiO 2 possess active organic terminal groups, which can be reacted with organic resins to form a uniform matrix. 18,19 These characteristics make nano-SiO 2 good resin additives.…”