Inorganic-organic compound hole sealing coating

Abstract

The invention relates to an inorganic-organic compound hole sealing coating comprising two parts of a hole sealing layer and an anti-fouling layer, wherein the hole sealing layer is formed by an inorganic hole sealing agent through a dipping-pulling method and a thermal processing method on a test sample after surface processing, the anti-fouling layer is formed by an organic anti-fouling agent through the dipping-pulling method and the thermal processing method on the hole sealing layer, and the inorganic hole sealing agent is an SiO2-Al2O3 colloidal sol hole sealing agent; the organic anti-fouling agent is polytetrafluoroethylene diluent which is prepared by taking polytetrafluoroethylene dispersing liquid, distilled water and a non-ionic type surfactant as raw materials. The preparationmethod of the inorganic-organic compound hole sealing coating provided by the invention comprises two parts of preparing the inorganic hole sealing layer and preparing the organic anti-fouling layer.The inorganic hole sealing layer provided by the invention can obviously lower the porosity of the coating and obviously enhance the erosion resistance performance and the high-temperature resistanceperformance of the coating; the organic anti-fouling layer can effectively lower the surface energy of the coating, enables stains not to be easy to attach to the surface of the coating and has favorable anti-fouling function.

Description

technical field

[0001] The invention relates to the field of coatings, in particular to an inorganic-organic composite sealing coating for thermal spraying ceramic coatings. Background technique

[0002] Thermal spraying ceramic coating is a layered accumulation structure formed by numerous deformed particles interlaced and stacked together in waves, so there are inevitably some pores between particles in the coating. When the coating is used for wear resistance, a certain amount of pores in the coating can be used to store lubricants, which is beneficial to friction reduction; but when used for corrosion-resistant coatings, the corrosive medium will penetrate into the surface of the substrate and interact with the substrate The reaction will cause the corrosion of the substrate, which will greatly reduce the corrosion resistance and service life of the coating, and may even cause the coating to crack and fall off, resulting in the failure of the coating. Therefore, in orde...