Preparation method of graphene/titanium dioxide transparent anticorrosive coating

A titanium dioxide and anti-corrosion coating technology, applied in anti-corrosion coatings, coatings, devices for coating liquids on the surface, etc., can solve the problems of low precision and opaque coating layers, and achieve easy control of thickness and uniform anti-corrosion coating. , Improve the effect of photogenerated current

Inactive Publication Date: 2017-01-11
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] For the above-mentioned technical problems in the prior art, the invention provides a kind of preparation method of graphene/titanium dioxide transparent anticorrosion coating, the preparat

Method used

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  • Preparation method of graphene/titanium dioxide transparent anticorrosive coating
  • Preparation method of graphene/titanium dioxide transparent anticorrosive coating
  • Preparation method of graphene/titanium dioxide transparent anticorrosive coating

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Preparation of graphene oxide / titanium oxide dispersion:

[0029] Preparation of component A graphene oxide solution: Weigh 0.01 g of freeze-dried graphene oxide, add 1 L of distilled water, and ultrasonically disperse for 1 hour.

[0030] B component TiO 2 Preparation: Take 10% TiO 2 Add 1L of distilled water to 100 ml of sol solution, and ultrasonically disperse for 1 hour.

[0031] (2) Pretreatment of 304 stainless steel samples: Clean the surface of the stainless steel plate with deionized water for 15 minutes, and dry it with a fan.

[0032] (3) Coating of graphene oxide / titanium oxide coating:

[0033] Use the method of suspension coating: preheat the surface of the sample with a hot air blower for 2 minutes, apply component A by means of suspension coating (brush coating), and dry it, then apply component B and dry it.

[0034] (4) After coating, the sample is in N 2 Annealed at 200°C for 120 minutes under protective atmosphere. A graphene / titanium oxid...

Embodiment 2

[0037] (1) Preparation of graphene oxide / titanium oxide dispersion:

[0038] Preparation of component A graphene oxide solution: Weigh 0.1 g of freeze-dried graphene oxide, add 1 L of distilled water, and ultrasonically disperse for 1 hour.

[0039] B component TiO 2 Preparation: Take 10% TiO 2 Add 1 L of distilled water to 500 ml of sol solution, and ultrasonically disperse for 1 hour.

[0040] (2) Pretreatment of stainless steel samples: the surface of the stainless steel plate was cleaned with deionized water for 15 min, and dried with a blower.

[0041] (3) Coating of graphene oxide / titanium oxide coating:

[0042] Apply by brush: Preheat the surface of the sample with a hot air blower for 2 minutes, apply component A and dry it, then apply component B and dry it. Repeat the above operation 4 times.

[0043] (4) After coating, the sample is in N 2 Anneal at 500°C for 20 minutes under protective atmosphere. A graphene / titanium oxide anti-corrosion coating with good t...

Embodiment 3

[0046] (1) Preparation of graphene oxide / titanium oxide dispersion:

[0047] Preparation of component A graphene oxide solution: Weigh 0.05 g of freeze-dried graphene oxide, add 1 L of distilled water, and disperse ultrasonically for 1 hour.

[0048] B component TiO 2 Preparation: Take 10% TiO 2 Add 1L of distilled water to 300 ml of sol solution, and ultrasonically disperse for 1 hour.

[0049] A+B mixed liquid: mix according to the volume ratio of A component: B component 1:1.

[0050] (2) Pretreatment of stainless steel samples: Clean the surface of the stainless steel plate with deionized water for 15 minutes, and dry it with a fan.

[0051] (3) Coating of graphene oxide / titanium oxide coating:

[0052] Ultrasonic atomization spraying method is adopted: 500 ml of A+B coating solution is put into an ultrasonic atomization sprayer, sprayed for 2 minutes, and dried. Repeat the above operation 2 times.

[0053] (4) After coating, the sample is in N 2 Anneal at 100°C for...

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Abstract

The invention relates to a preparation method of graphene/titanium dioxide transparent anticorrosive coating. The preparation method includes: preparing graphene oxide dispersing liquid; preparing titanium oxide dispersing liquid; preprocessing a stainless steel sample; coating the stainless steel sample with graphene oxide/titanium oxide coating, to be more specific, using a suspension coating or ultrasonic spray coating manner to coat the stainless steel sample with the graphene oxide dispersing liquid, performing blow drying, using a suspension coating or ultrasonic spray coating manner to coat the stainless steel sample with the titanium oxide dispersing liquid, and performing blow drying; or using a suspension coating or ultrasonic spray coating manner to coat the stainless steel sample with the mixed solution of the graphene oxide dispersing liquid and the titanium oxide dispersing liquid; annealing the coated sample at 100-500 DEG C under N2 protective atmosphere for 20-120 minutes to obtain the graphene/titanium oxide anticorrosive coating. Tests show that compared with uncoated stainless steel, the corrosion current density of the polarization curve of the coated stainless steel sample in a sodium chloride solution is lowered by about one magnitude order, the passivation range of the coated stainless steel sample is increased by 2.5 times, and the polarization resistance of the coated stainless steel sample is increased by 8-17 times.

Description

[0001] Technical field: [0002] The invention belongs to the field of chemical industry and relates to a metal coating technology, in particular to a preparation method of a graphene / titanium dioxide transparent anticorrosion coating. [0003] Background technique: [0004] Commonly used methods to prevent metal corrosion mainly include coating, metal or non-metal protective layer and electrochemical protection. Coating protection is widely used, mainly through shielding effect and partial cathodic protection effect to achieve the corresponding effect. Traditional polymer-based coatings are thick and opaque, which can affect the physical properties of the metal substrate. In addition, thick coatings cannot meet the coating protection effect of delicate parts. With the improvement of metal anti-corrosion requirements, traditionally used organic coatings can no longer meet the needs. [0005] Graphene has excellent electrical conductivity, heat resistance, chemical inertness ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08B05B17/06B05C1/06
CPCB05B17/06B05C1/06C09D1/00C09D5/08
Inventor 陈爱英胡威风王现英
Owner UNIV OF SHANGHAI FOR SCI & TECH
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