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A kind of graphite phase carbon nitride/epoxy resin corrosion-resistant coating and its preparation method and application

A graphite phase carbon nitride, epoxy resin technology, applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve the problems of corrosion resistance, poor durability, micropores, etc., and achieve improved adhesion and filler dispersibility. Good, paint protection rate increase effect

Active Publication Date: 2021-06-08
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a graphite-like carbon nitride / epoxy resin corrosion-resistant coating and its preparation method and application, which overcomes the defects of pure epoxy resin coatings in the prior art in corrosion resistance and poor durability in marine environments and There are micropore defects in the curing process of epoxy resin, and effectively improve the adhesion of epoxy resin to the surface of the metal substrate

Method used

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  • A kind of graphite phase carbon nitride/epoxy resin corrosion-resistant coating and its preparation method and application
  • A kind of graphite phase carbon nitride/epoxy resin corrosion-resistant coating and its preparation method and application
  • A kind of graphite phase carbon nitride/epoxy resin corrosion-resistant coating and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1 (1 wt.%g-C 3 N 4 / EP)

[0035] A preparation method of a graphite-like carbon nitride / epoxy resin corrosion-resistant coating, comprising the following steps: first preparing a bulk phase carbon nitride, then preparing a graphite-like carbon nitride, and preparing the prepared graphite-like carbon nitride g-C 3 N 4 Nanoparticles are dispersed in acetone, ultrasonically dispersed, then epoxy resin and solvents (n-butanol and xylene) are sequentially added to the dispersion, and ultrasonic dispersion is continued to obtain a uniform mixed solution, then the mixed solution is stirred and heated to remove excess Acetone, and then add the curing agent solution to the above mixture and stir for 10-30 minutes; put it in a vacuum drying oven at room temperature for 10-20 minutes to remove the air bubbles in the mixture; obtain a graphite-like carbon nitride / epoxy resin corrosion-resistant coating. Finally, the treated mixture is coated on the surface of the metal ...

Embodiment 2

[0040] Example 2 (1.5 wt.%g-C 3 N 4 / EP)

[0041] This embodiment provides a preparation method of graphite-like carbon nitride / epoxy resin corrosion-resistant coating, the specific steps are as follows:

[0042] The preparation process of the bulk phase carbon nitride and the preparation process of the graphitic phase carbon nitride are the same as in Example 1.

[0043] Graphite phase carbon nitride g-C 3 N 4 Take 15mg of nanoparticles and disperse them in 4g of acetone for 20-30min to obtain a dispersion liquid, then add 1g of epoxy resin and 1g of solvent (n-butanol and xylene) into the dispersion liquid, and ultrasonically disperse for 30-60min to obtain a uniform Mixed solution, then stirred and heated the mixed solution to remove excess acetone; then added 6 mg of curing agent solution to the above mixture and stirred for 10-30 minutes; put it in a vacuum drying oven at room temperature for 10-15 minutes to remove air bubbles in the mixture. Finally, apply the trea...

Embodiment 3

[0044] Example 3 (2 wt.%g-C 3 N 4 / EP)

[0045] This embodiment provides a preparation method of graphite-like carbon nitride / epoxy resin corrosion-resistant coating, the specific steps are as follows:

[0046] The preparation process of the bulk phase carbon nitride and the preparation process of the graphitic phase carbon nitride are the same as in Example 1.

[0047] Graphite phase carbon nitride g-C 3 N 4 Take 20 mg of nanoparticles and disperse them in 4 g of acetone for 20-30 minutes to obtain a dispersion liquid, then add 1 g part of epoxy resin and 1 g part of solvent (n-butanol and xylene) into the dispersion liquid, and ultrasonically disperse for 30-60 min to obtain a uniform Consistent mixed solution, then stirred and heated the mixed solution to remove excess acetone; then added 6mg curing agent solution to the above mixture and stirred for 10-30min; put it in a vacuum drying oven at room temperature for 10-15min to remove the air bubbles in the mixture. Fina...

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Abstract

The invention discloses a graphite-like carbon nitride / epoxy resin corrosion-resistant coating and its preparation method and application. The corrosion-resistant coating comprises the following components: graphite-like carbon nitride, epoxy resin, solvent and curing agent; wherein , the weight ratio of graphite-like carbon nitride and epoxy resin is: 0.5-5:100; the type of epoxy resin is glycidyl ether epoxy resin. The invention overcomes the defects of poor corrosion resistance and durability of pure epoxy resin coatings in the marine environment, and graphite-like carbon nitride has a large specific surface area, which can effectively prevent corrosive media from entering the coating, making the penetration path of the coating more tortuous, Compared with the pure epoxy resin coating, the corrosion rate of the composite coating is reduced by 2-3 orders of magnitude; and the adhesion between the coating and the substrate is also significantly improved, from 3B level to 5B level. While greatly improving the corrosion resistance of the metal substrate, it also effectively improves the adhesion between the epoxy resin and the surface of the metal substrate.

Description

technical field [0001] The invention relates to a graphite-like carbon nitride / epoxy resin corrosion-resistant coating and a preparation method and application thereof, belonging to the technical field of anti-corrosion coatings. Background technique [0002] With the continuous expansion of the scope of marine resource development, more and more metals and alloys are used in the marine environment. However, due to the presence of a large number of corrosive substances in the marine environment (especially Cl - ), corrosion damage to metals and alloys is inevitable. After reaching a certain period of service, the durability and mechanical properties of metals and alloys will decline, which will affect the safe use of marine ships and buildings. Therefore, it is of great significance to adopt appropriate protection technology to prevent and slow down the corrosion of materials. The most common method is to use epoxy resin coating or metal plating to cover the surface of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/61
CPCC09D5/08C09D163/00C09D7/61C09D7/70C08K7/00C08K3/28
Inventor 张猛许美贤李金鑫李香平赵晶李生虎郭丽娜晏泓
Owner TAIYUAN UNIV OF TECH
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