N-SiC/Al2O3 nano-composite anti-corrosion coating and preparation method thereof

A nano-composite and anti-corrosion technology, applied in coating, nanotechnology, metal material coating process, etc., can solve the problems of uneven distribution of components, coarse particle size, incomplete melting of coating, etc., and achieve low cost and high density High, energy-saving effect

Pending Publication Date: 2022-01-21
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of the traditional blending ball milling method is relatively coarse, which will cause problems such as incomplete melting of the coating and uneven distribution of components.

Method used

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  • N-SiC/Al2O3 nano-composite anti-corrosion coating and preparation method thereof
  • N-SiC/Al2O3 nano-composite anti-corrosion coating and preparation method thereof
  • N-SiC/Al2O3 nano-composite anti-corrosion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Step 1, configure Al(NO 3 ) 3 9H 2 Aqueous solution of O; Al(NO 3 ) 3 9H 2 The volume of O solution is 1000mL, Al(NO 3 ) 3 9H 2 The mass fraction of O is 20wt.%;

[0045] Step 2, adding urea in a set ratio to the aqueous solution in step 1, the concentration of the urea solution is 1wt.%, and fully stirring to dissolve it;

[0046] Step 3, adding excess ammonia water dropwise to the mixed solution in step 2 and continuously stirring until a white precipitate is formed, the concentration of ammonia water is 30%;

[0047] Step 4, dissolving a certain amount of polycarbosilane (PCS) in xylene solution, the volume of the configuration solution is 300mL, and the mass fraction of polycarbosilane (PCS) is 20wt.%;

[0048] Step 5, adding the solution configured in step 4 and a certain amount of PVA aqueous solution to the solution in step 3, the concentration of the PVA aqueous solution is 3%, and its addition is 200mL;

[0049] Step 6, the mixture in step 5 is placed...

Embodiment 2

[0053] Step 1, configure Al(NO 3 ) 3 9H 2 Aqueous solution of O; Al(NO 3 ) 3 9H 2 The volume of O solution is 1000mL, Al(NO 3 ) 3 9H 2 The mass fraction of O is 50wt.%;

[0054] Step 2, adding urea in a set ratio to the aqueous solution in step 1, the concentration of the urea solution is 3wt.%, and fully stirring to dissolve it;

[0055] Step 3, adding excess ammonia water dropwise to the mixed solution in step 2 and continuously stirring until a white precipitate is formed, the concentration of ammonia water is 50%;

[0056] Step 4, dissolving a certain amount of polycarbosilane (PCS) in xylene solution, the volume of the configuration solution is 500mL, and the mass fraction of polycarbosilane (PCS) is 40wt.%;

[0057] Step 5, adding the solution configured in step 4 and a certain amount of PVA aqueous solution to the solution in step 3, the concentration of the PVA aqueous solution is 8%, and its addition is 300mL;

[0058] Step 6, the mixture in step 5 is placed...

Embodiment 3

[0062] Step 1, configure Al(NO 3 ) 3 9H 2 Aqueous solution of O; Al(NO 3 ) 3 9H 2 The volume of O solution is 1000mL, Al(NO 3 ) 3 9H 2 The mass fraction of O is 30wt.%;

[0063] Step 2, add urea in a set ratio to the aqueous solution in step 1, the concentration of the urea solution is 1.5wt.%, and dissolve it after fully stirring;

[0064] Step 3, adding excess ammonia water dropwise to the mixed solution in step 2 and continuously stirring until a white precipitate is formed, the concentration of ammonia water is 35%;

[0065] Step 4, dissolving a certain amount of polycarbosilane (PCS) in xylene solution, the volume of the configuration solution is 350mL, and the mass fraction of polycarbosilane (PCS) is 25wt.%;

[0066] Step 5, adding the solution configured in step 4 and a certain amount of PVA aqueous solution to the solution in step 3, the concentration of the PVA aqueous solution is 4.5%, and the addition amount is 230mL;

[0067] Step 6, placing the mixture ...

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Abstract

The invention discloses an N-SiC/Al2O3 nano-composite anti-corrosion coating and a preparation method thereof. The preparation method comprises the following steps that an aqueous solution of Al (NO3) 3.9 H2O is prepared according to a set proportion; urea in the set proportion is added into the aqueous solution and fully stirred to be dissolved; ammonia water is dropwise added into a mixed solution and continuously stirred until white precipitate is generated; polycarbosilane is dissolved in a xylene solution; the prepared solution and a PVA aqueous solution are added into the solution in the previous step; the mixture is placed on a roller ball mill for ball milling; dried spherical spraying feeding mixed powder of Al (OH) 3, the polycarbosilane and the urea is obtained; and the wear-resistant and compact N-SiC/Al2O3 nano-composite coating is prepared by a one-step method. The N-SiC/Al2O3 nano-composite anti-corrosion coating and the preparation method thereof has the strength and toughness of a metal material and the advantages of high temperature resistance, corrosion resistance and wear resistance of a ceramic material, and the service life of metal parts is greatly prolonged.

Description

technical field [0001] The invention belongs to the field of preparation of advanced ceramic coatings, in particular to a kind of N-SiC / Al 2 o 3 Nanocomposite anti-corrosion coating and preparation method thereof. Background technique [0002] As an important corrosion protection technology, ceramic coating is used to reduce the corrosion effect of materials from the environment, which can greatly extend the life of metal components. Ceramic materials have good corrosion resistance, so ceramic coatings are added to the metal surface to improve the corrosion resistance of metal materials while retaining the original strength and toughness of the metal. [0003] Al 2 o 3 Ceramic coatings have become important materials for high-temperature coatings due to their stable chemical properties, good manufacturability, and low cost. But Al 2 o 3 There is almost no conductivity, and as a high-temperature anti-corrosion ceramic, it has its own limitations, which greatly limits t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/10C23C4/137B82Y40/00
CPCC23C4/134C23C4/10C23C4/137B82Y40/00
Inventor 王弘喆崔雄华张磊曹海涛杨哲一崔锦文
Owner XIAN THERMAL POWER RES INST CO LTD
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