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Supporting anti-corrosive coating modified by graphene, preparation and application thereof

A graphene modified and anti-corrosion coating technology, which is applied in the direction of anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve the problem that the graphene modified coating is not used in conjunction with the topcoat, and achieve excellent anti-corrosion effects. The effect of strong protection ability and good protection performance

Active Publication Date: 2016-03-23
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiency that the existing graphene modified coating is not used in conjunction with the topcoat, the main purpose of the present invention is to provide a graphene modified supporting anti-corrosion coating and its preparation and application

Method used

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  • Supporting anti-corrosive coating modified by graphene, preparation and application thereof
  • Supporting anti-corrosive coating modified by graphene, preparation and application thereof
  • Supporting anti-corrosive coating modified by graphene, preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The preparation of embodiment 1 modified graphene

[0034] Add 2.0g of graphene to 10g of deionized water; add 4.0g of sodium hexametaphosphate dispersant, stir well to fully disperse the powder particles; slowly add hydrochloric acid in the slurry to adjust the pH value of the slurry to 3-5; Add 2.72g of sodium dodecylbenzenesulfonate as a modifier, stir slowly for 30min, move it to an ultrasonic cleaner, continue constant temperature ultrasonication for 30min, to make it fully react; after repeated filtration and washing with deionized water, take the filter residue in the Dry at 110-135°C, dry and cool, then grind to obtain modified graphene; perform XRD characterization on the surface-modified graphene. figure 1 It is the XRD pattern of graphene before and after modification. It can be seen from the figure that the crystal structure of graphene does not change before and after modification.

Embodiment 2

[0035] Embodiment 2 Preparation of graphene modified epoxy supporting coating system

[0036] Get 0.1g of above-mentioned obtained modified graphene, add it in excess ethanol, ultrasonic 1 hour, stir fully then, make it disperse evenly; Resin Chemical Company), then add 0.6g leveling agent (BYK371), 0.9g defoamer (BYK085), 1.1g silane coupling agent (KH550), and stir well; 48.5g curing agent (purchased from Feicheng De Yuan Chemical Co., Ltd.) was added to the prepared organic resin dispersion, stirred evenly, scraped on the surface of the metal test plate, and then placed in a 60 ° C oven to completely remove the organic solvent to obtain the primer. Place the prepared coating test panel in an oven at 60°C for drying, and then apply another coat of paint after the first coat of paint dries for 24 hours as an intermediate paint. Then apply the polyurethane topcoat (purchased from Ningbo Feilun Paint Co., Ltd.) according to the method of coating the intermediate paint, and the...

Embodiment 3

[0037] Embodiment 3 Preparation of graphene modified polyurethane supporting coating system

[0038] Take 0.1 g of modified graphene, add it to excess ethanol, ultrasonicate for 1 hour, and then fully stir to make it evenly dispersed. The prepared dispersion containing graphene was added to 80g of polyurethane resin (purchased from Ningbo Feilun Paint Co., Ltd.), followed by adding 0.6g leveling agent (BYK371), 0.9g defoamer (BYK085), 1.1g silane Combine agent (KH560) and 13.6g of polyurethane curing agent, stir evenly, scrape coat on the surface of the metal test plate, and then place it in a 60°C oven to completely remove the organic solvent to obtain the primer. Place the prepared coating test panel in an oven at 60°C for drying, and then apply another coat of paint after the first coat of paint dries for 24 hours as an intermediate paint. Then apply the polyurethane topcoat (purchased from Ningbo Feilun Paint Co., Ltd.) according to the method of coating the intermediate ...

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Abstract

The invention relates to anti-corrosive coatings and particularly provides a supporting anti-corrosive coating modified by graphene, preparation and an application thereof. The supporting anti-corrosive coating is composed of an undercoat, an intermediate coating and a finishing coat, wherein the undercoat and the intermediate coating are modified graphene coatings and the finishing coat is polyurethane finishing coat or fluorocarbon finishing coat. The modified graphene coating is prepared by mixing a surfactant, as a modifier, with graphene to modify the graphene, dispersing the modified graphene in an organic solvent, and adding the dispersed mixture to organic resin, a curing agent and an additive. The supporting anti-corrosive coating is excellent in anti-water-seepage and salt-fog-resistant performance, is simple in process and is low in cost, and can be used as a heavy anti-corrosion coating for coating oil pipelines, oil storage tanks, chemical devices, ships and marine platforms and the like substrates for prolonging service life of the metal substrates.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a graphene-modified matching anti-corrosion coating and its preparation and application. Background technique [0002] The good hydrophobic properties of graphene can effectively inhibit the adsorption of water molecules on the surface of the coating. Adding a small amount of graphene to a polymer or organic coating can effectively improve the properties of the parent material. Graphene can use the two-dimensional sheet structure to be stacked layer by layer in the coating to form a dense physical isolation layer. It is difficult for small molecule corrosive media (water molecules, chloride ions, etc.) to pass through this dense isolation layer, which plays an outstanding physical isolation. effect. It is more practical and practical to use graphene-modified resins as supporting coatings. At present, the three-layer kit paint including primer, intermediate paint and top coat is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D163/00C09D7/12B05D1/38B05D7/14
CPCB05D1/38B05D7/14C08K3/04C08K9/04C09D5/08C09D7/62C09D163/00
Inventor 赵霞周玉丰朱庆军陈长伟金祖权刘栓侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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