Anti-corrosion powder coating for deep well pipeline as well as preparation method and application of anti-corrosion powder coating

A powder coating and pipeline technology, applied in the field of deep well pipeline anti-corrosion powder coating and its preparation, can solve the problems of high heat resistance and difficult to meet the requirements, achieve the improvement of crosslinking density and rigid group content, meet protection requirements, improve glass effect of temperature

Active Publication Date: 2022-05-27
FUJIAN WANAN IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high heat resistance of the existing anti-corrosion powder coatings is difficult to meet the requirements, so it is necessary to improve the traditional epoxy anti-corrosion powder coatings to increase the glass transition temperature of the coating to obtain high heat resistance, thereby meeting the needs of deep well oilfield production

Method used

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  • Anti-corrosion powder coating for deep well pipeline as well as preparation method and application of anti-corrosion powder coating
  • Anti-corrosion powder coating for deep well pipeline as well as preparation method and application of anti-corrosion powder coating

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation method of the deep well pipeline anti-corrosion powder coating of the present embodiment, the steps are as follows:

[0029] S1: Preparation of modified graphene

[0030] 10g of silane coupling agent was dissolved in 5L of alcohol-water mixed solvent (water / ethanol volume ratio=25:75) and fully stirred to obtain a silane coupling agent solution; 20g of graphene was put into the above-mentioned silane coupling agent solution, After ultrasonic dispersion for 1 hour, heated to 70 °C, stirred and refluxed for 8 hours, filtered and washed with an alcohol-water mixed solvent to remove excess silane coupling agent to obtain silane-modified modified graphene.

[0031] S2: Preparing the premix

[0032] Weigh 150g of bisphenol A novolac epoxy resin, 150g of o-cresol novolac epoxy resin, 200g of bisphenol A epoxy resin, 100g of phenolic hydroxyl curing agent, and 25g of aromatic amine curing agent, put them into a mixer and stir for 1 min. The molar ratio of the ...

Embodiment 2

[0036] The preparation method of the deep well pipeline anti-corrosion powder coating of the present embodiment, the steps are as follows:

[0037] S1: Preparation of modified graphene

[0038] 10g of silane coupling agent was dissolved in 5L of alcohol-water mixed solvent (water / ethanol volume ratio=20:80) and fully stirred to obtain a silane coupling agent solution; 18g of graphene was put into the above-mentioned silane coupling agent solution, After ultrasonic dispersion for 1 hour, heated to 60° C., stirred and refluxed for 9 hours, filtered and washed with an alcohol-water mixed solvent to remove excess silane coupling agent to obtain silane-modified modified graphene.

[0039] S2: Preparing the premix

[0040] Weigh 150g of bisphenol A novolac epoxy resin, 150g of o-cresol novolac epoxy resin, 180g of bisphenol A epoxy resin, 100g of phenolic hydroxyl curing agent, and 30g of aromatic amine curing agent, put them into a mixer and stir for 1 min; then add 30g modified ...

Embodiment 3

[0044] The preparation method of the deep well pipeline anti-corrosion powder coating of the present embodiment, the steps are as follows:

[0045] S1: Preparation of modified graphene

[0046] 10g of silane coupling agent was dissolved in 5L of alcohol-water mixed solvent (water / ethanol volume ratio=30:70) and fully stirred to obtain a silane coupling agent solution; 22g of graphene was put into the above-mentioned silane coupling agent solution, After ultrasonic dispersion for 1 hour, heated to 80 °C, stirred and refluxed for 7 hours, filtered and washed with an alcohol-water mixed solvent to remove excess silane coupling agent to obtain silane-modified modified graphene.

[0047] S2: Preparing the premix

[0048]Weigh 150g of bisphenol A novolac epoxy resin, 180g of o-cresol novolac epoxy resin, 210g of bisphenol A epoxy resin, 100g of phenolic hydroxyl curing agent, 20g of aromatic amine curing agent, put it into a mixer and stir for 1min; then add 40g modified graphene ...

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Abstract

The invention provides a deep well pipeline anti-corrosion powder coating as well as a preparation method and application thereof. The anticorrosive powder coating for the deep well pipeline comprises the following components in parts by weight: 48-54 parts of epoxy resin, 12-13.5 parts of a curing agent, 2-4 parts of modified graphene, 1-2 parts of an auxiliary agent and 26.5-37 parts of pigment filler, wherein the epoxy resin comprises bisphenol A linear novolac epoxy resin, o-cresol formaldehyde epoxy resin and bisphenol A epoxy resin; the curing agent comprises a phenolic hydroxyl curing agent and an aromatic amine curing agent. According to the anticorrosive powder coating for the deep well pipeline, the crosslinking density and the rigid group content can be increased, so that the glass transition temperature of the powder coating is increased, the high-temperature resistance and the hardness of the coating are enhanced, the coating can bear high-temperature and low-temperature alternation, and the coating can meet the use requirement of a high-pressure condition; and the protection requirement of the deep well oil pipe can be better met.

Description

technical field [0001] The invention relates to the technical field of petrochemical equipment and pipeline coatings, in particular to a deep-well pipeline anti-corrosion powder coating and a preparation method and application thereof. Background technique [0002] With the increasing exploitation of oil and natural gas, the corrosion and protection of well pipes in oil and gas fields have been paid more and more attention. At present, the harsh environment of domestic oil well pipes mainly includes high temperature and high pressure, high halogen ion content, high salinity and water content, high acid gas corrosion, high production (erosion), etc., and the deep underground working environment and corrosion factors of oil production pipelines See Table 1. [0003] Table 1 Deep underground working environment and corrosion factors of small-diameter pipelines for oil production [0004] [0005] With the deepening of oilfield exploitation depth, the protection requirement...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D163/04C09D5/08C09D5/03C09D7/62
CPCC09D163/00C09D5/08C09D5/033C08G59/56C08G59/621C08L2203/18C08L63/04C08K9/06C08K3/042Y02P20/141
Inventor 刘际平苏捷陈冠军黄文林琳艺杨璠雷光林
Owner FUJIAN WANAN IND
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