Siloxene@MoS2 core-shell structure loaded with TA endows the EP coating with self-healing function and excellent wear resistance

The corrosion and wear of metals have long been persistent challenges for researchers and engineers. This work aims to develop a coating with long-term corrosion resistance, while addressing the poor wear resistance of epoxy coatings. 2D Siloxene (S) nanosheets were prepared using the topochemical method. Using S nanosheets as carriers, a core-shell structure with MoS₂ encapsulating S nanosheets was constructed via a hydrothermal method, endowing the coating with high barrier properties and wear resistance. To further strengthen the long-term corrosion resistance of the coating and improve the compatibility between the core-shell structure and EP resin, a layer of tannic acid was uniformly loaded onto the surface of the core-shell structure through a one-pot coprecipitation method. A systematic investigation was conducted on the corrosion and wear resistance of the coating. The results reveal that the composite coating, exhibiting outstanding corrosion resistance, also shows remarkable wear resistance. The |Z| 0.01 Hz of the composite coating increased from 8.4 × 10⁸ Ω•cm² to 9.62 × 10 9 Ω•cm 2 , with the wear rate dropping by 72.5 %. This investigation yields valuable guidance for the construction of coatings with long-term corrosion resistance, simultaneously providing a new perspective on the application of S nanosheets.