Why do boiler thermal spraying carry out sealing solution?

       The thermal spraying of boiler spraying is a method of heating the spraying raw materials to a melting or semi-melting state by using a heat source, and then spraying and depositing them at a certain rate on the surface of the normalized substrate to produce a coating, giving the substrate surface a unique purpose.

Taking the general spraying process of supersonic flame spraying and atmospheric plasma spraying as an example, the coating made by boiler spraying is a layered deposition structure produced by countless deformed particles overlapping each other into waves. The deformed particles in the coating inevitably have some porosity between the particles.

Porosity can be divided into surface pores, closed pores and through pores according to the way they exist. When the coating is used for anti-corrosion, if there are open or closed pores in the coating, the rust material cannot immediately reach the surface of the substrate, so it cannot immediately cause rust to the substrate; If there are through holes, the rust material will immediately reach the surface layer of the protected substrate according to the porosity, causing chemical or electrochemical corrosion between the coating and the substrate. Coating is invalid.



Therefore, in order to prevent the corrosion of the substrate by rusting substances, improve the corrosion resistance of the coating and expand its application range in a unique natural environment, it is necessary to carry out sealing solutions for the coating