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Graphene/epoxy zinc-rich composite coating for ultra-deep well robot detecting cable armored steel wire and preparation method and application thereof

A technology for detecting cables and armored steel wires, applied in the field of coatings, can solve the problems of unsatisfactory improvement of anti-corrosion performance, etc., and achieve the effects of prolonging the cathodic protection action time, improving physical shielding effect, and hindering diffusion and penetration

Inactive Publication Date: 2018-12-28
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the conventional method is to directly mix commercially available graphene with paint raw materials, and the epoxy zinc-rich paint containing graphene obtained by this method has an unsatisfactory effect on improving the anti-corrosion performance

Method used

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  • Graphene/epoxy zinc-rich composite coating for ultra-deep well robot detecting cable armored steel wire and preparation method and application thereof
  • Graphene/epoxy zinc-rich composite coating for ultra-deep well robot detecting cable armored steel wire and preparation method and application thereof
  • Graphene/epoxy zinc-rich composite coating for ultra-deep well robot detecting cable armored steel wire and preparation method and application thereof

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preparation example Construction

[0029] The invention provides a preparation method of a graphene / epoxy zinc-rich composite coating for an ultra-deep well robot detection cable armored steel wire, comprising the following steps:

[0030] (1) liquid-phase exfoliation of graphene nanosheets in a wetting agent to obtain few-layer graphene;

[0031] (2) the few-layer graphene that described step (1) is obtained is mixed with diluent and solidifying agent, obtains graphene sizing material;

[0032] (3) after the graphene rubber material that described step (2) is obtained is mixed with epoxy resin melt, carry out degassing and obtain ultra-deep well robot detection cable armored steel wire with graphene / epoxy zinc-rich composite coating; The epoxy resin melting material includes epoxy resin, zinc powder and additives; the viscosity of the epoxy resin melting material is 80-120KU.

[0033] The invention performs liquid-phase exfoliation on the graphene nanosheets in a wetting agent to obtain few-layer graphene. I...

Embodiment 1

[0066] Put the epoxy resin into the reaction kettle, heat it up to 50°C with mechanical stirring, add 40wt.% zinc powder, 3wt.% paraffin, 2wt.% modified castor oil, 2wt.% methyl acrylate and 1wt.% silicone oil, the stirring and dispersing speed is 1000r / min, and the stirring time is 1h to obtain the epoxy resin mixture;

[0067] According to the mass ratio of graphene nanosheets: N-methylpyrrolidone is 1:1000, the graphene nanosheets are placed in N-methylpyrrolidone, and dispersed for 30-60min by ultrasonic cell pulverizer, the ultrasonic power is 380W, and then Suction filter the solution after ultrasonic to obtain few-layer graphene;

[0068] Toluene and acetone were prepared according to a mass ratio of 1:1 to obtain an epoxy diluent, mixed with 1 part of epoxy diluent and 12 parts of ethylenediamine, stirred electromagnetically for 30 minutes, then added 0.2 parts of few-layer graphene, and dispersed using an ultrasonic cell pulverizer 40min, ultrasonic power is 100W, ob...

Embodiment 2

[0072] Put the epoxy resin into the reaction kettle, heat it up to 50°C with mechanical stirring, add 60wt.% zinc powder, 6wt.% hexenyl bisstearamide, 4wt.% polyethylene wax slurry, 1wt. .% polydimethylsiloxane and 1wt.% emulsified silicone oil, the stirring dispersion speed is 1000r / min, and the stirring time is 1 h to obtain the epoxy resin mixture;

[0073] According to the mass ratio of graphene nanosheets: N-methylpyrrolidone is 1:1200, the graphene nanosheets are placed in N-methylpyrrolidone, and dispersed for 60 minutes using an ultrasonic cell pulverizer with an ultrasonic power of 380W. The solution is suction-filtered to obtain few-layer graphene;

[0074] Epoxy diluent is prepared with the mass ratio of ethyl acetate and ethanol as 1:1, mix 1 part of epoxy diluent and 15 parts of dipropylenetriamine in mass ratio, stir electromagnetically for 35min, and then add 0.2 part of few-layer graphene , using an ultrasonic cell pulverizer to disperse for 50 minutes, and th...

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Abstract

The invention belongs to the technical field of coatings, and particularly relates to a graphene / epoxy zinc-rich composite coating for an ultra-deep well robot detecting cable armored steel wire and apreparation method and an application thereof. The preparation method includes first performing liquid phase stripping on a graphene nanosheet in a lubricant to obtain a small layer of grapheme to improve the dispersibility of the grapheme simultaneously; then mixing the small layer of graphene with a diluent and a curing agent to form a graphene colloid to avoid the sedimentation of the small layer of grapheme and further provide favorable conditions for uniform dispersion of the small layer of graphene in the composite coating; using the small layer of graphene and zinc powder together in the matched mode to make the graphene as an electron transfer channel between adjacent zinc powder to promote anodic dissolution of the zinc powder and prolong the cathodic protection time of the coating on a steel substrate. The graphene can fill pores of the coating, improve the physical shielding effect of the coating, hinder diffusion and penetration of a corrosive medium into a matrix materialand further achieve the effect of improving the anti-corrosion performance of the coating.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a graphene / epoxy zinc-rich composite coating for an ultra-deep well robot detection cable armored steel wire and a preparation method and application thereof. Background technique [0002] With the rapid development of the economy and society, people's demand for oil and natural gas has grown rapidly, making oil and petroleum gas resources in shallow formations (within 5km depth) increasingly exhausted worldwide. Therefore, it is necessary to use ultra-deep well robots to detect oil and gas resources in ultra-deep formations seems particularly urgent. The strong corrosion environment of ultra-deep strata will have a fatal impact on the signal transmission and service life of the robot detection cable. Therefore, how to effectively treat the armored steel wire on the surface of the detection cable has attracted the attention of relevant engineers and technicians. [...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/10
CPCC08K2003/0893C09D5/106C09D163/00C08K3/042C08K3/08
Inventor 黄峰曹祥康卢献忠乔文玮刘静
Owner WUHAN UNIV OF SCI & TECH
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