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Organic–inorganic multilayer coating containing organically modified silicates, epoxy resins and TiO2 nanocontainers loaded with 8-hydroxyquinoline were produced on AA2024-T3 substrates via dip coating method. The parameters of the curing temperature and time were optimized via variation in a widespread range in order to realize coatings with best anticorrosive properties. Curing temperature at 110 °C for 24 h presented the best anticorrosive behavior. The morphology of the coating was examined via scanning electron microscopy. The composition of the coatings was determined by energy dispersive X-ray analysis and Fourier transform infra-red spectroscopy. Furthermore, the coatings were exposed to corrosive environment and evaluated by electrochemical impedance spectroscopy. We demonstrate that the presence of loaded TiO2 nanocontainers enhances the anticorrosive properties of the coatings; specifically, the total impedance values were increased about two orders of magnitude compare to the bare substrate after 400 h of exposure to aggressive environment.

The combination of clay and intumescent, also termed hybrid organic−inorganic coating is an attractive strategy to improve the flame retardancy of polyurethane foam (PUF). However, the fabrication of such flame retardants remains challenging as it requires the deposition of many layers to achieve the desired level of the intumescing effect. Herein, we describe a facile route to fabricate a hybrid clay−intumescent coating comprising a OnePot−deposited chitosan (CH)−phytic acid (PA) polyelectrolyte complex (PEC) intumescent stacked on top of a layer-by−layer self−assembled clay trilayer (TL) of poly− d −lysine, CH, and alginate-stabilized montmorillonite. Combustibility tests using cone calorimetry revealed that a PUF coating of CH−PA PEC intumescent on a 5 TL clay nanobrick wall (CH−PA@5 TL@PUF) can reduce the peak heat release rate (a critical flammability metric), peak rate of smoke release, and peak CO2 production rate of neat PUF by 73%, 33%, and 65%, respectively. Additionally, this hybrid coating imparted UL−94 horizontal burning rating by avoiding melt dripping and flashover, while the neat foam was completely consumed during the UL−94 flammabilty test. The proposed method is adaptable for the facile construction of other multifunctional surfaces in various application fields.

This study is focused on corrosion protection of magnesium alloy ZK10. The aim of the research was the production of a hybrid organic–inorganic coating that would be a combination of epoxy resin, organically modified silicates as well as conductive polymer. Furthermore, ceramic containers loaded with corrosion inhibitor were incorporated into the coating for the improvement of its corrosion protection properties. The composition and structure of the coatings were investigated by Fourier transform infrared spectroscopy, energy dispersive X-ray analysis and scanning electron microscopy. Extent of the anti-corrosion protection of the formed coatings was examined electrochemically using electrochemical impedance spectroscopy. The results showed that the incorporation of the containers loaded with inhibitor into the coatings improved their corrosion protection properties. Furthermore, artificial defects of 1 mm were made to the coatings with the best anticorrosive performance in order to study the electrochemical processes taking place in the scratched area and to estimate the effect of the corrosion inhibitor in the corrosion of the substrate.