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Titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and preparation method thereof

A technology of titanium dioxide and ceramic coating, which is applied in the field of cermet coating, can solve problems such as insufficient corrosion resistance, and achieve the effects of low cost, improved corrosion resistance, and good hydrophobic properties

Active Publication Date: 2021-10-22
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Technical problem to be solved: In view of the lack of corrosion resistance of existing ceramic coatings, the present invention provides a titanium dioxide nanowire-enhanced corrosion-resistant ceramic coating and a preparation method thereof, which uses titanium dioxide nanowires to delay the diffusion rate of the corrosive medium and finally The effect of protecting the metal substrate and enhancing the coating's ability to resist electrolyte penetration, thereby further improving the corrosion resistance of the ceramic coating

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  • Titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and preparation method thereof
  • Titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and preparation method thereof
  • Titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and preparation method thereof

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Embodiment 1

[0032] In this embodiment, the preparation method of the titanium dioxide nanowire reinforced corrosion-resistant ceramic coating is as follows:

[0033] (1) Prepare 60 mL of sodium hydroxide solution (10M) by magnetic stirring, then add 2 g of titanium dioxide nanoparticles (25 nm) to the sodium hydroxide solution, and stir magnetically until uniform dispersion. Move the solution to a polytetrafluoroethylene reactor and heat it at 180°C for 48 hours; wash the precipitate twice with deionized water; wash the nanowires with 0.5% (v / v) HCl solution until the pH of the cleaning solutionfigure 1 (a) shown.

[0034] (2) Add 2 g of heptadecafluorodecyltrimethoxysilane to 30 mL of absolute ethanol and mix well, stir for 2 hours to fully hydrolyze the fluoroalkylsilane; add 6 g of titanium dioxide nanowires to the mixed solution, mix The solution was stirred at 45° C. for 2 hours, and the obtained product was washed three times with absolute ethanol; finally, the modified titanium dio...

Embodiment 2

[0042] In this embodiment, the preparation method of the titanium dioxide nanowire reinforced corrosion-resistant ceramic coating is as follows:

[0043] (1) Prepare 60 mL of sodium hydroxide solution (10M) by magnetic stirring, then add 2 g of titanium dioxide nanoparticles (25 nm) to the sodium hydroxide solution, and stir magnetically until uniform dispersion. Move the solution to a polytetrafluoroethylene reactor and heat it at 180°C for 48 hours; wash the precipitate twice with deionized water; wash the nanowires with 0.5% (v / v) HCl solution until the pH of the cleaning solutionfigure 1 (a) shown.

[0044] (2) Add 2 g of heptadecafluorodecyltrimethoxysilane to 30 mL of absolute ethanol and mix well, stir for 2 hours to fully hydrolyze the fluoroalkylsilane; add 6 g of titanium dioxide nanowires to the mixed solution, mix The solution was stirred at 45° C. for 2 hours, and the obtained product was washed three times with absolute ethanol; finally, the modified titanium dio...

Embodiment 3

[0052] In this embodiment, the preparation method of the titanium dioxide nanowire reinforced corrosion-resistant ceramic coating is as follows:

[0053] (1) Prepare 60 mL of sodium hydroxide solution (10 M) by magnetic stirring, then add 2 g of titanium dioxide nanoparticles (25 nm) into the sodium hydroxide solution, and stir until uniformly dispersed. Move the solution to a polytetrafluoroethylene reactor and heat it at 180°C for 48 hours; wash the precipitate twice with deionized water; wash the nanowires with 0.5% (v / v) HCl solution until the pH of the cleaning solutionfigure 1 (a) shown.

[0054] (2) Add 2 g of heptadecafluorodecyltrimethoxysilane to 30 mL of absolute ethanol and mix well, stir for 2 hours to fully hydrolyze the fluoroalkylsilane; add 6 g of titanium dioxide nanowires to the mixed solution, mix The solution was stirred at 45° C. for 2 hours, and the obtained product was washed three times with absolute ethanol; finally, the modified titanium dioxide nano...

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Abstract

The invention discloses a titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and a preparation method thereof, and belongs to the technical field of metal ceramic coatings. The coating is prepared from the following raw materials: a nano additive, ceramic aggregate, a curing agent and a binder, wherein the nano additive is modified titanium dioxide nanowires. Titanium dioxide nanowires are prepared through a thermal reaction method, the titanium dioxide nanowires are further modified through heptadecafluorodecyl trimethoxysilane, then the modified titanium dioxide nanowires serve as a nano additive to be added into a bonding ceramic coating, and the corrosion-resistant ceramic coating is obtained after curing. Compared with a titanium dioxide nano-additive-free and titanium dioxide nano-particle-reinforced ceramic coating with the same content, the titanium dioxide nanowire reinforced corrosion-resistant ceramic coating provided by the invention has good hydrophobic performance and electrolyte permeation resistance, can delay the diffusion speed of a corrosive medium, therefore, the matrix is protected from being damaged, the service life of the metal matrix is prolonged, and the application field of the coating in a severe environment is widened.

Description

technical field [0001] The invention relates to the technical field of cermet coatings, in particular to a titanium dioxide nanowire-reinforced corrosion-resistant ceramic coating and a preparation method thereof. Background technique [0002] A single metal material has some problems in terms of high temperature oxidation resistance, corrosion resistance and wear resistance, and its service life and scope of use are restricted. Ceramic coatings on metal surfaces have attracted more and more attention because of their combination of many advantages of metal and ceramic materials. [0003] Bonded ceramic coating, as a new type of inorganic coating, is widely used due to its good performance, simple preparation process, environmental protection, economy and safety compared with silicate inorganic coating and organic coating. focus on. Since the binder used in the preparation of the bonded ceramic coating is an inorganic binder, there is still a certain gap in its corrosion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/08C09D7/62
CPCC09D1/00C09D5/08C09D7/62C09D7/70
Inventor 刘雅玄郭浦山吴王平张屹
Owner CHANGZHOU UNIV
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