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Organic-inorganic hybrid sealing agent for plasma sprayed ceramic coating, preparation method and application thereof

A ceramic coating, plasma technology, applied in coatings, anti-corrosion coatings, devices for coating liquids on the surface, etc., can solve the problems of rapid wear and tear of anti-biological adsorption coatings, and achieve excellent anti-water bio-adsorption performance, excellent Good corrosion resistance and chemical compatibility

Active Publication Date: 2019-12-31
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under abrasive conditions, the anti-biosorption coating is easy to wear and fall off quickly, and cannot have a waterproof biosorption effect on the surface of the plasma sprayed ceramic coating

Method used

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  • Organic-inorganic hybrid sealing agent for plasma sprayed ceramic coating, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A plasma sprayed Al 2 O 3 -13wt.%TiO 2 The organic-inorganic hybrid sealing agent for ceramic coatings, the main components of which include precursor A, methyl silicone resin film former B, absolute ethanol, ammonia and deionized water, and the precursor A includes ethyl orthosilicate The molar ratio of ester and methyltriethoxysilane is 100:120, and the molar ratio of precursor A, absolute ethanol, ammonia and deionized water is 1:33:2:6, so The added amount of the methyl silicone resin film forming agent B accounts for 3% of the total mass of the organic-inorganic hybrid sealing agent for coating, and the precursor A is mixed with absolute ethanol, ammonia and deionized water, Through processes such as hydrolysis reaction, the group containing the silica inorganic component in the pore sealing agent is obtained.

[0028] The preparation method of the organic-inorganic hybrid sealing agent for coating includes the following steps:

[0029] (1) According to the above ratio...

Embodiment 2

[0039] A plasma sprayed Cr 2 O 3 -8wt.%TiO 2 The organic-inorganic hybrid sealing agent for ceramic coatings, the main components of which include precursor A, methyl silicone resin film former B, absolute ethanol, ammonia and deionized water, and the precursor A includes ethyl orthosilicate The molar ratio of ester and methyltriethoxysilane is 100:200, and the molar ratio of precursor A, absolute ethanol, ammonia and deionized water is 1:32:3:7, so The added amount of the methyl silicone resin film forming agent B accounts for 5% of the total mass of the organic-inorganic hybrid sealing agent for coating, and the precursor A is mixed with absolute ethanol, ammonia and deionized water, Through processes such as hydrolysis reaction, the group containing the silica inorganic component in the pore sealing agent is obtained.

[0040] The preparation method of the organic-inorganic hybrid sealing agent for coating includes the following steps:

[0041] (1) According to the above ratio,...

Embodiment 3

[0051] A kind of plasma sprayed ZrO 2 The organic-inorganic hybrid sealing agent for ceramic coatings, the main components of which include precursor A, methyl silicone resin film former B, absolute ethanol, ammonia and deionized water, and the precursor A includes ethyl orthosilicate The molar ratio of ester and methyltriethoxysilane is 100:70, and the molar ratio of precursor A, absolute ethanol, ammonia and deionized water is 1:31:2:5, so The added amount of the methyl silicone resin film-forming agent B accounts for 1% of the total mass of the organic-inorganic hybrid sealing agent for coating, and the precursor A is mixed with absolute ethanol, ammonia and deionized water, Through processes such as hydrolysis reaction, the group containing the silica inorganic component in the pore sealing agent is obtained.

[0052] The preparation method of the organic-inorganic hybrid sealing agent for coating includes the following steps:

[0053] (1) According to the above ratio, first m...

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Abstract

The invention discloses an organic-inorganic hybrid sealant for a plasma spraying ceramic coating. The organic-inorganic hybrid sealant comprises a precursor A, a methyl silicone resin film forming agent B, absolute ethyl alcohol, ammonia water and deionized water; the precursor A comprises ethyl orthosilicate and methyl triethoxysilane with a molar ratio of 100:(60-200); the molar ratio of the precursor A to the absolute ethyl alcohol to the ammonia water to the deionized water is 1: (30-35):(2-3):(5-7); and the addition amount of the methyl silicone resin film forming agent B accounts for 1-5% of the total mass of the organic-inorganic hybrid sealant for the coating. The invention further discloses a preparation method of the organic-inorganic hybrid sealant for the plasma spraying ceramic coating and application of the sealant to sealing treatment of the plasma spraying ceramic coating. The sealant disclosed by the invention is capable of taking a long-acting effect on protecting the plasma spraying ceramic coating used in a water environment and incapable of affecting the wear resistance of the ceramic coating.

Description

Technical field [0001] The invention relates to an organic-inorganic hybrid sealing agent for plasma sprayed ceramic coating, a preparation method and application thereof, and belongs to the technical field of material corrosion and protection. Background technique [0002] Plasma sprayed ceramic coating has the characteristics of high hardness and good wear resistance, and is widely used in aviation, machinery, mining and other fields. However, plasma sprayed ceramic coatings usually have 5% to 8% pores, which cannot be eliminated by process technology. In a complex corrosive environment, these holes will act as corrosion channels, causing corrosion of the metal substrate under the ceramic coating. Therefore, it is necessary to eliminate or close the pores through subsequent processing to avoid direct contact between the metal matrix and the corrosive medium. Among them, sealing the coating with a sealing agent is a common technique to improve the corrosion resistance of coate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D5/08C09D7/61B05D7/24
CPCB05D7/24C08K3/36C09D5/08C09D183/04
Inventor 汪米琪易于吴林涛周泽华王泽华江少群王刚
Owner HOHAI UNIV
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