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Preparation method of steel-based corrosion-resistant super-hydrophobic coating

A super-hydrophobic coating and corrosion-resistant technology, which is applied in coatings, anti-corrosion coatings, and devices for coating liquid on the surface, etc., can solve the problems of not being able to provide corrosion protection to the substrate, poor wear resistance and corrosion resistance, and achieve excellent Super-hydrophobic properties, excellent acid and alkali corrosion resistance, and easy-to-achieve preparation methods

Inactive Publication Date: 2020-12-08
陈佳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wear and corrosion resistance of a single fluorine coating is poor, and it cannot give the substrate permanent corrosion protection

Method used

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  • Preparation method of steel-based corrosion-resistant super-hydrophobic coating
  • Preparation method of steel-based corrosion-resistant super-hydrophobic coating
  • Preparation method of steel-based corrosion-resistant super-hydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing a steel-based corrosion-resistant superhydrophobic coating, said preparation method mainly comprising the following steps:

[0040] 1. Pretreatment of carbon nanotubes (CNTs):

[0041] Put 10g of CNTs powder in a stainless steel ball mill tank, and perform ball milling at a speed of 300r / min in an Ar protective atmosphere. Take out the ball-milled CNTs and place them in a beaker, and then add 50mL of ball-milled CNTs with a volume fraction of 60 % nitric acid, 50mL sulfuric acid mixed solution with a volume fraction of 70%, heated and stirred in an oil bath at 50°C for 5h, poured out the mixed solution, centrifuged, washed repeatedly with distilled water, removed the supernatant, and obtained acid-treated CNTs black liquid, Acidified black CNTs powder was obtained after freeze-drying at -20~-5°C for 15 hours.

[0042] 2. Preparation of superhydrophobic coating:

[0043] (1) Mix 45.2g tetraethyl silicate with 10.0g absolute ethanol, stir to form ...

Embodiment 2

[0050] A method for preparing a steel-based corrosion-resistant superhydrophobic coating, said preparation method mainly comprising the following steps:

[0051] Pretreatment of carbon nanotubes (CNTs):

[0052] Put 15g of CNTs powder in a stainless steel ball mill tank, and perform ball milling at a speed of 400r / min in an Ar protective atmosphere. Take out the ball-milled CNTs and place them in a beaker, add 60mL of nitric acid and 60mL of sulfuric acid mixed solution, and put them in oil at 60°C. Heated and stirred in the bath for 5 hours, poured out the mixture, centrifuged, washed repeatedly with distilled water, and removed the supernatant to obtain acid-treated CNTs black liquid, and freeze-dried for 15 hours to obtain acidified CNTs black powder.

[0053] Preparation of superhydrophobic coating:

[0054] (1) Mix 73.8g butyl titanate with 10.0g absolute ethanol, stir to form solution A;

[0055] (2) Mix 40mL of deionized water with 40mL of absolute ethanol, and add dr...

Embodiment 3

[0061] A method for preparing a steel-based corrosion-resistant superhydrophobic coating, said preparation method mainly comprising the following steps:

[0062] Pretreatment of carbon nanotubes (CNTs):

[0063] Put 15g of CNTs powder in a stainless steel ball mill tank, and conduct ball milling at a speed of 350r / min in an Ar protective atmosphere. Take out the ball-milled CNTs and place them in a beaker, add 60mL of nitric acid and 60mL of sulfuric acid mixed solution, and put them in oil at 65°C. After heating and stirring in the bath for 6 hours, the mixture was poured out, centrifuged, and washed repeatedly with distilled water, and the supernatant was removed to obtain acid-treated CNTs black liquid, which was then freeze-dried for 20 hours to obtain acidified CNTs black powder.

[0064] Preparation of superhydrophobic coating:

[0065] (1) Mix 61.7g of tetraisopropyl titanate with 10.0g of absolute ethanol, and stir to form solution A;

[0066] (2) Mix 40mL deionized ...

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Abstract

The invention relates to the field of metal surface treatment, in particular to a preparation method of a steel-based corrosion-resistant super-hydrophobic coating. The preparation method thereof comprises the following steps: dissolving a silanol compound or titanium alcohol in absolute ethyl alcohol, violently stirring by using citric acid as a catalyst and a constant-temperature magnetic stirrer to completely hydrolyze the silanol compound or titanium alcohol compound to prepare sol, and mixing the prepared sol with a pretreated CNTs dispersion liquid; spraying a mixed solution on the surface of the impurity-removed steel in a spray drying manner, then putting a sample into a tubular furnace for curing reaction, and then taking out the sample, so as to obtain the corrosion-resistant super-hydrophobic coating. The preparation method is low in synthesis temperature, uniform in solution dispersion, easy in reaction, simple and convenient to operate, environment-friendly and fluoride-free, the obtained steel-based corrosion-resistant super-hydrophobic coating is excellent in acid and alkali corrosion resistance, the contact angle can still be kept at 150 degrees or above after the coating is soaked in an acid and alkali solution for 12 hours, and the coating has important value in the actual application process of steel.

Description

technical field [0001] The invention relates to the field of metal surface treatment, in particular to a method for preparing a steel-based corrosion-resistant superhydrophobic coating. Background technique [0002] Steel is an essential and important material for national construction. Steel is light in weight, has good toughness, and has good heat resistance and sealing performance. It is widely used in various aspects of life. However, steel itself is easy to corrode, which not only restricts the application of steel, but also causes great economic losses, so it is very necessary to endow steel with corrosion resistance. With the gradual deepening of the concept of environmental protection and energy saving, the surface with self-cleaning function has been widely studied. Coating superhydrophobic coating on the surface of the substrate can better realize the self-cleaning function. Coating superhydrophobic coating on the surface of steel substrate The hydrophobic coating...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08C09D7/62B05D7/16
CPCB05D7/16C09D1/00C09D5/08C09D7/62C09D7/70
Inventor 陈佳
Owner 陈佳
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