A graphene water-based epoxy composite coating suitable for high chlorine saturated carbon dioxide environment and its preparation method and application

A carbon dioxide and composite coating technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve problems such as corrosion of metal pipes, achieve good dispersion, improve coating quality, and ensure the effect of anti-corrosion effects

Active Publication Date: 2021-03-23
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a graphene water-based epoxy composite coating suitable for a high chlorine-saturated carbon dioxide environment and its preparation method and application. Epoxy composite coating solves the problem that metal pipes are prone to corrosion in high chlorine saturated carbon dioxide aqueous solution, and meets the current requirements for high chlorine concentration and CO 2 Concentration requirements for use in production operations in oil and gas field production environments

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  • A graphene water-based epoxy composite coating suitable for high chlorine saturated carbon dioxide environment and its preparation method and application
  • A graphene water-based epoxy composite coating suitable for high chlorine saturated carbon dioxide environment and its preparation method and application
  • A graphene water-based epoxy composite coating suitable for high chlorine saturated carbon dioxide environment and its preparation method and application

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preparation example Construction

[0037] The invention discloses a preparation method of a graphene water-based epoxy composite coating suitable for a high chlorine saturated carbon dioxide environment, comprising the following steps:

[0038] 1) Use deionized water and absolute ethanol to clean the oil stains on the metal base of 20 steel, and then use sandpaper No. 180 to No. 1500 to polish it sequentially, and then polish it to a mirror surface for later use.

[0039] 2) Using sodium carboxymethyl cellulose as a dispersant and fumed silica as an anti-sedimentation agent, add water-based epoxy emulsion to configure a composite emulsion; wherein, the amount of sodium carboxymethyl cellulose added is 0.05% of the total mass of the composite slurry %-0.2%; the addition amount of fumed silica is 0.1%-0.3% of the total mass of the composite slurry, and the water-based epoxy emulsion is E44 water-based epoxy emulsion.

[0040] 3) Adding an appropriate amount of ammonia water to the composite emulsion to adjust the...

Embodiment 1

[0046] 1) Use deionized water and absolute ethanol to clean the oil stains on the metal base of 20 steel, then use sandpaper from No. 180 to No. 1500 to polish in sequence, and then polish to a mirror surface for later use;

[0047] 2) Using sodium carboxymethyl cellulose as a dispersant, the addition amount is 0.1%wt; fumed silica is used as an anti-sedimentation agent, and the addition amount is 0.15%wt, adding sodium carboxymethyl cellulose and fumed silica E44 water-based epoxy emulsion configuration composite emulsion;

[0048] 3) Add an appropriate amount of ammonia water to adjust the pH to 9, and remove a small amount of precipitate by centrifugation (centrifugation speed is 5000rpm, centrifugation time is 30min);

[0049] 4) the few-layer graphene that mass fraction is 0.25% is dissolved in the aqueous epoxy compound emulsion, adds surfactant sodium dodecyl sulfonate, and the addition of sodium dodecyl sulfonate is the number of few-layer graphene Add 8% of the mass ...

Embodiment 2

[0053] 1) Use deionized water and absolute ethanol to clean the oil stains on the metal base of 20 steel, then use sandpaper from No. 180 to No. 1500 to polish in sequence, and then polish to a mirror surface for later use;

[0054] 2) Using sodium carboxymethyl cellulose as a dispersant, the addition amount is 0.1%wt; fumed silica is used as an anti-sedimentation agent, and the addition amount is 0.15%wt, adding sodium carboxymethyl cellulose and fumed silica E44 water-based epoxy emulsion configuration composite emulsion;

[0055] 3) Add an appropriate amount of ammonia water to adjust the pH to 9, and remove a small amount of precipitate by centrifugation (centrifugation speed is 5000rpm, centrifugation time is 30min);

[0056] 4) the few-layer graphene that mass fraction is 0.5% is dissolved in the aqueous epoxy compound emulsion, adds surfactant sodium dodecyl sulfonate, and the addition of sodium dodecyl sulfonate is the number of few-layer graphene Add 8% of the mass a...

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Abstract

The invention discloses a graphene waterborne epoxy composite coating applicable to a high-chlorine saturated carbon dioxide environment, and a preparation method and an application thereof, belongingto the field of anticorrosive coatings. The preparation method comprises the following steps: adding a dispersing agent and an anti-settling agent into a water-based epoxy emulsion, carrying out uniform mixing, adding a few layers of graphene, a surfactant and a water-based epoxy curing agent so as to obtain a composite slurry, and carrying out coating and curing so as to obtain the graphene water-based epoxy composite coating applicable to the high-chlorine saturated carbon dioxide environment. Compared with a pure water-based epoxy coating, the graphene water-based epoxy composite coating applicable to the high-chlorine saturated carbon dioxide environment is significantly improved in corrosion resistance, waterproof performance and stability in the high-chlorine saturated carbon dioxide environment. The graphene waterborne epoxy composite coating applicable to the high-chlorine saturated carbon dioxide environment can be applied to a high-chlorine saturated carbon dioxide aqueous solution environment, serves as a pipeline protection layer in the oil and gas field production environment and provides reliable long-acting anti-corrosion protection for base metal.

Description

technical field [0001] The invention belongs to the field of anti-corrosion coatings, and relates to a graphene water-based epoxy composite coating suitable for a high-chlorine saturated carbon dioxide environment and a preparation method and application thereof. Background technique [0002] As an tertiary oil recovery method, carbon dioxide flooding technology has been widely used all over the world because of its wide application range, high oil displacement efficiency and relatively low cost. CO in the Little Creek oil field in the United States 2 In the oil displacement test, without any carbon dioxide corrosion inhibitor, the wall of the oil extraction pipe was corroded and perforated within 5 months, and the corrosion rate was as high as 12.7mm / a. Due to its excellent performance and stability, organic coatings have been widely used. For example, the use of epoxy resin coating on the surface of oil and gas pipelines can effectively prevent the corrosion of the base m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D5/08
CPCC09D5/08C09D163/00C08L1/286C08K7/26C08K3/042
Inventor 胡海军徐灏栗月姣申志远
Owner XI AN JIAOTONG UNIV
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