Abstract:Based on the status of long-term sand erosion on the surface coating of steel structure facilities in the central and western regions of Inner Mongolia, in order to improve the anti-sand erosion performance of the coating and enhance the durability of steel structure facilities under special circumstances, modified graphene oxide/polyurethane coating. Covalent bond modification of graphene oxide using a silane coupling agent, and Fourier transform infrared spectroscopy, Raman spectroscopy, and XRD were used to characterize the structural changes of graphene oxide before and after modification; the modified graphene oxide / polyurethane coating and Ordinary polyurethane coatings are tested for mechanical properties and simulated sand erosion tests. The results showed that the silane coupling agent successfully modified the covalent bond of graphene oxide, and the modified graphene oxide had good dispersion and compatibility in polyurethane; the hardness of the coating changed with the modified graphene oxide. The increase of the content first increases and then decreases; when the content is 0.5wt.%, The erosion rate of the coating is significantly reduced, and the anti-sand erosion performance is significantly enhanced; the test and calculation results show that the simulation of the coating after the super strong sand storm erosion The service life is extended by at least 0.8 years compared to ordinary polyurethane coatings.