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

A technology of high temperature resistance and corrosion resistance, which is applied in the field of coating preparation for high temperature and corrosion resistance on the inner wall of the flue. The effect of low layer cost, good heat resistance and acid resistance

Inactive Publication Date: 2008-01-02
TIANJIN ZHENDONG PAINTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1: A method for preparing a high-temperature-resistant and corrosion-resistant coating for the inner wall of the flue. First, 100 g of the raw material potassium silicate solution, 2.5 g of polymethyltriethoxysilane, 0.2 g of carbon fiber, and calcium aluminate Mix 1.7g of raw material silicon phosphate 7g, glass flakes 11g, hydrated silicon dioxide 4.5g, potassium chromium sulfate 1g and mix evenly, then mix the above two mixed solutions, apply on the cement test board, and heat A coating with a thickness of 400 μm, a temperature resistance of 350° C., and corrosion resistance to dilute sulfuric acid was obtained.

Embodiment 2

[0007] Example 2: A method for preparing a high-temperature-resistant and corrosion-resistant coating for the inner wall of the flue, mixing 100 g of sodium silicate solution, 2.5 g of sodium methyl silicate, and 1.6 g of magnesium aluminate, and then mixing the condensed aluminum phosphate 8g, 8g of scaly mica, 2.5g of microsilica fume, 0.7g of borosilicate fiber, 13g of quartz powder, mix well, mix the above mixed solution, apply it on the steel test plate, heat and solidify, get 250pm, 400℃ resistance Temperature, sulfuric acid corrosion resistant coating.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/02C09D5/08C09D5/18
Inventor 张云波
Owner TIANJIN ZHENDONG PAINTS CO LTD
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