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Abrasion resistant ceramic coating

A technology of wear-resistant ceramics and coatings, applied in the field of wear-resistant coatings, can solve the problems of cast stone slabs such as poor toughness, reduced service life, and lack of step levels

Active Publication Date: 2007-08-08
CHONGQING LUOMAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In many industries such as cement building materials, thermal power generation, metallurgy and mining, petrochemical industry, etc., there are a large number of equipment or devices in operation, and some parts are scoured, worn or corroded by various media. Corrosion reduces the service life of these equipment or devices, directly leads to more downtime for equipment maintenance, high maintenance costs, and low equipment operation rate; at the same time, it also leads to adverse consequences such as decreased equipment efficiency, increased power consumption, increased production costs, and serious environmental pollution.
[0003] To solve the above problems, it is currently limited to the parts of these equipment that are washed, worn or corroded by the medium, and cast stone plates, ceramic sheets, wear-resistant steel plates, polymer wear-resistant plates, etc. are used. These products have great shortcomings, such as : The cast stone plate has poor toughness, brittleness, and insufficient wear resistance; although the pasted ceramic sheet is wear-resistant, the glue bonding stability is poor and easy to fall off, and can only be used at room temperature; the wear-resistant steel plate only has excellent wear resistance. Good toughness, but it is difficult to process into special shapes, and it is expensive, and the installation cycle is long and difficult; while the polymer wear-resistant plate has good toughness, but its wear resistance is not high, and it is difficult to adapt to strong erosion and strong wear
"A wear-resistant ceramic coating and its preparation method" disclosed in Chinese patent CN1872919 uses brown corundum with a particle size of 1-3mm and 1mm as the main raw material, and there are great defects in particle gradation, lacking sufficient cascade levels, The particles cannot be closely filled with each other, so that the void ratio is large, the strength, stiffness and toughness are reduced, and the temperature resistance is low; and the interface bonding part has poor wear resistance and erosion resistance, which makes the overall wear resistance in use poor. Reduced service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Select 12Kg of fused mullite with a particle size of 3-4mm; 35Kg of fused mullite with a particle size of 1-3mm; 15Kg of fused white corundum with a particle size of 0.088-1mm and 5Kg of silicon carbide; fused white with a particle size of 180 mesh Corundum 7Kg; silicon carbide 5Kg and silicon nitride (Si 3 N 4 ) 5Kg; pure calcium aluminate cement 7Kg; nano-silica fume 1Kg with particle size ≤ 100nm and active α-Al with particle size ≤ 2μm 2 o 3 Micropowder 7Kg; ultra-dry powder active superplasticizer SM-F0.38Kg, sodium citrate 0.04Kg and sodium hexametaphosphate 0.02Kg; first, 12Kg of fused mullite with a particle size of 3-4mm and fused mullite with a particle size of 1-3mm Put the main material of 35Kg of fused mullite into the strong mixer, start it and stir for half a minute; then put 7Kg of binder pure calcium aluminate cement into the aforementioned mixer, start it and stir for half a minute; Silicon powder 1Kg, active α-Al with particle size ≤2μm 2 o 3 7Kg...

Embodiment 2

[0044] Select 5Kg of fused brown corundum with a particle size of 3-4mm; 33Kg of fused brown corundum with a particle size of 1-3mm and 10Kg of silicon carbide; 10Kg of dense corundum with a particle size of 0.088-1mm; 5Kg of dense corundum with a particle size of 180 mesh and 2Kg of silicon carbide ; 5Kg of silicon carbide with a particle size of 325 mesh; 25Kg of CA50 calcium aluminate cement; 5Kg of nano-silica fume with a particle size of ≤100nm, and active α-Al with a particle size of ≤2μm 2 o 3 Micropowder 1Kg; ultra-dry powder active superplasticizer SM-F 0.11Kg, sodium citric acid 0.09Kg and sodium hexametaphosphate 0.09Kg; firstly, 5Kg of fused brown corundum with a particle size of 3-4mm, and electric fused alumina with a particle size of 1-3mm Put 33Kg of melted brown corundum and 10Kg of silicon carbide into a powerful mixer, and start stirring for half a minute; then put 25Kg of binder CA50 calcium aluminate cement into the aforementioned mixer, and start stirring...

Embodiment 3

[0046] Select 8Kg of fused brown corundum with a particle size of 3-4mm and 2Kg of fused sub-white corundum; 25Kg of fused brown corundum with a particle size of 1-3mm, 5Kg of fused sub-white corundum and 5Kg of silicon carbide; dense fused alumina with a particle size of 0.088-1mm 13Kg of corundum, 3Kg of white corundum; 2Kg of dense corundum with a particle size of 180 meshes, 2Kg of silicon carbide and silicon nitride (Si 3 N 4 ) 2Kg; particle size is 325 mesh silicon carbide 7Kg, boron carbide (B 4 C) 1Kg; 16Kg of pure calcium aluminate cement; 3Kg of nano-silica fume with particle size ≤ 100nm, active α-Al with particle size ≤ 2μm 2 o 3 Micropowder 4Kg; ultra-dry powder active high-efficiency superplasticizer SM-F0.25Kg, sodium citrate 0.07Kg and sodium hexametaphosphate 0.06Kg; firstly, 8Kg of fused brown corundum with a particle size of 3-4mm, 2Kg of fused sub-white corundum and Put 25Kg of fused brown corundum with a particle size of 1-3mm, 5Kg of fused sub-white co...

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Abstract

The invention discloses a brushing-proof abrasion-proof and erosion-proof ceramic paint, which is characterized by the following: selecting at least one of electric-melting brown corundum, electric-melting subwhite corundum, electric-melting white corundum, carborundum and electric melting mullite with different grain sizes as main material and at least one of compact corundum, electric-melting subwhite corundum, electric-melting white corundum, carborundum, silicon nitride and boron nitride as auxiliary material; using CA50 calcium aluminate cement or pure calcium aluminate cement as binder and nanometer micro-silica powder and active alpha-Al2O3 micropowder as reinforcer; making hyperdrying active high-effective dehydragent, sodium citrate and sodium hexametaphosphate as composite additive; loading in the strength stirrer to stir 12-17min; blending evenly; packing.

Description

technical field [0001] The invention relates to a coating in the field of composite materials, in particular to a ceramic-like anti-scouring, anti-abrasion and anti-corrosion wear-resistant coating. Background technique [0002] In many industries such as cement building materials, thermal power generation, metallurgy and mining, petrochemical industry, etc., there are a large number of equipment or devices in operation, and some parts are scoured, worn or corroded by various media. Corrosion reduces the service life of these equipment or devices, directly leads to more downtime for equipment maintenance, high maintenance costs, and low equipment operation rate; at the same time, it also leads to adverse consequences such as decreased equipment efficiency, increased power consumption, increased production costs, and serious environmental pollution. . [0003] To solve the above problems, it is currently limited to the parts of these equipment that are washed, worn or corrod...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622
Inventor 牟元全
Owner CHONGQING LUOMAN NEW MATERIAL TECH CO LTD
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