Preparation method of temperature-resistant and erosion-resistant coating for walling of flue

Abstract

The invention discloses a high temperature-resistant and corrosion resistant paint making method of flue inwall, which comprises the following steps: blending 100g potassium silicate solution, 2.5g polymethyl triethoxy silane, 0.2g carbon element and 1.7g calcium aluminate evenly; blending 7g silicon phosphate, 11g scale shaped glass, 4.5g hydrated silica and 1g chromic potassium sulfate evenly; blending two composite liquids evenly to coat on the cement board; heating to obtain the coating with thickness at 400pm to resist 350 deg. c and diluted sulfur acid.

Description

technical field

[0001] The invention relates to a method for preparing a high-temperature-resistant and corrosion-resistant coating for the inner wall of a flue. Background technique

[0002] It is known that heat-resistant silicone coatings and zinc-rich coatings have poor acid corrosion resistance; the heat resistance of phenolic coatings and epoxy vinyl coatings with better acid resistance is within 200 °C; although the heat resistance of inorganic water glass cement can reach 300 Above ℃, it also has acid resistance, but it has the disadvantages of many pores and high brittleness, so it cannot be used as a coating. Phosphate zinc-rich coatings can withstand high temperatures of 500-600 ° C for a long time, have good anti-rust effects, and have the characteristics of fast drying, strong adhesion, hardness and wear resistance, but they are not resistant to acidic medium corrosion. Silicate coatings are used for the protection of building exterior surfaces, and are not sui...