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A kind of titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and preparation method thereof

A titanium dioxide and ceramic coating technology, applied in the field of metal ceramic coating, can solve problems such as insufficient corrosion resistance, and achieve the effects of low cost, broad market prospects and strong safety

Active Publication Date: 2022-08-09
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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  • A kind of titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and preparation method thereof
  • A kind of titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and preparation method thereof
  • A kind of titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and preparation method thereof

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Embodiment 1

[0032] The preparation method of the titanium dioxide nanowire reinforced corrosion-resistant ceramic coating in the present embodiment 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) into the sodium hydroxide solution, and stir magnetically until the dispersion is uniform. Transfer the solution to a polytetrafluoroethylene reactor and heat it at 180 °C for 48 hours; rinse the precipitate twice with deionized water; rinse the nanowires with 0.5% (v / v) HCl solution until the pH of the cleaning solution is figure 1 (a).

[0034] (2) Add 2 g of heptadecafluorodecyltrimethoxysilane to 30 mL of absolute ethanol, mix well, stir for 2 hours to fully hydrolyze 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...

Embodiment 2

[0042] The preparation method of the titanium dioxide nanowire reinforced corrosion-resistant ceramic coating in the present embodiment 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) into the sodium hydroxide solution, and stir magnetically until the dispersion is uniform. Transfer the solution to a polytetrafluoroethylene reactor and heat it at 180 °C for 48 hours; rinse the precipitate twice with deionized water; rinse the nanowires with 0.5% (v / v) HCl solution until the pH of the cleaning solution is figure 1 (a).

[0044] (2) Add 2 g of heptadecafluorodecyltrimethoxysilane to 30 mL of absolute ethanol, mix well, stir for 2 hours to fully hydrolyze 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...

Embodiment 3

[0052] The preparation method of the titanium dioxide nanowire reinforced corrosion-resistant ceramic coating in the present embodiment 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 magnetically until the dispersion is uniform. Transfer the solution to a polytetrafluoroethylene reactor and heat it at 180 °C for 48 hours; rinse the precipitate twice with deionized water; rinse the nanowires with 0.5% (v / v) HCl solution until the pH of the cleaning solution is figure 1 (a).

[0054] (2) Add 2 g of heptadecafluorodecyltrimethoxysilane to 30 mL of absolute ethanol, mix well, stir for 2 hours to fully hydrolyze 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 modifie...

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Abstract

A titanium dioxide nanowire reinforced corrosion-resistant ceramic coating and a preparation method thereof belong to the technical field of metal ceramic coatings. The coating raw materials are as follows: nano-additives, ceramic aggregates, curing agents and binders, wherein the nano-additives are modified titanium dioxide nanowires. In the present invention, titanium dioxide nanowires are prepared by a thermal reaction method, further modified by heptadecafluorodecyltrimethoxysilane, and added to the bonding ceramic coating as a nano-additive, and cured to obtain a corrosion-resistant ceramic coating. Compared with the reinforced ceramic coating without titania nano-additives and the same content of titania nanoparticles, the titania nanowire reinforced corrosion-resistant ceramic coating of the present invention has good hydrophobic properties and the ability to resist electrolyte penetration, and can delay the diffusion of corrosive media speed, thereby protecting the substrate from damage and extending the service life of the metal substrate, broadening the application field of the coating in harsh environments.

Description

technical field [0001] The invention relates to the technical field of metal ceramic 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 the service life and scope of use are limited. Ceramic coatings on metal surfaces have received more and more attention due to 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 coatings and organic coatings. 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 Patents(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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