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A biomimetic superhydrophobic anti-corrosion and scale-inhibiting coating and preparation method thereof

A super-hydrophobic and coating technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of poor anti-corrosion and scale-inhibition performance, achieve the effect of good corrosion resistance, good scale inhibition performance, and reduce the probability of mutual contact

Active Publication Date: 2021-08-03
QINGYANG ZHOUYANG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the present invention provides a bionic super-hydrophobic anti-corrosion and anti-scaling coating to solve the problem of poor anti-corrosion and anti-scaling performance of the existing artificial super-hydrophobic coating in the environment of strong acid, strong alkali or high-salt oilfield production fluid medium

Method used

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  • A biomimetic superhydrophobic anti-corrosion and scale-inhibiting coating and preparation method thereof
  • A biomimetic superhydrophobic anti-corrosion and scale-inhibiting coating and preparation method thereof
  • A biomimetic superhydrophobic anti-corrosion and scale-inhibiting coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1. Preparation of coatings for superhydrophobic anti-corrosion and anti-scale coatings

[0048] Evenly disperse 4 parts of carbon nanofibers, 10 parts of titanium oxide whiskers, 15 parts of negative ion powder, and 2 parts of dopamine hydrochloride in 40 parts of deionized water, stir evenly for 24 hours, filter and dry, and then dry the particles and 2 parts Parts of perfluorosilane, 70 parts of liquid crystal polymer (brand: VECTRA A150), 10 parts of polytetrafluoroethylene, uniformly dispersed in 80 parts of organic solvent.

[0049] 2. Pretreatment of metal substrate surface:

[0050] Use 400-mesh sandpaper to polish the surface of the aluminum substrate to remove the surface oxide film, and then put it into a mixed solution of ethanol and water for ultrasonic cleaning to remove impurities such as grease and dust on the surface. Use a mixed solution of ethanol and water to mix in equal volumes. Take out the aluminum plate and dry it for later use.

[0051] 3. Prepa...

Embodiment 2

[0061] 1. Preparation of coatings for superhydrophobic anti-corrosion and anti-scale coatings

[0062] 10 parts of carbon nanotubes, 10 parts of negative ion powder, 3 parts of dopamine hydrochloride, and 5 parts of hydroxyfluorosilane were uniformly dispersed in 50 parts of deionized water, stirred evenly for 24 hours, filtered and dried, and then the dried particles were mixed with 80 parts Parts of liquid crystal polymer (brand: DuPont 38045), 15 parts of perfluoroethylene propylene copolymer, uniformly dispersed in 90 parts of organic solvent.

[0063] 2. Preparation of superhydrophobic anti-corrosion and anti-scale coating

[0064] The metal substrate is sprayed at a constant temperature of 50°C, and then the coating of this example is placed in a programmed temperature control box and heated at 260°C for 10 minutes, then heated to 280°C for 30 minutes, and then cooled naturally to room temperature.

[0065] 3. Determination of coating properties

[0066] Hydrophobicity...

Embodiment 3

[0072] 1. The composition and ratio of the coating used for the super-hydrophobic anti-corrosion and anti-scaling coating: 10 parts of titanium oxide whiskers, 2 parts of carbon nanofibers, 10 parts of negative ion powder, 2 parts of dopamine hydrochloride, 4 parts of perfluorooctanoic acid, 40 parts of deionized water, 60 parts of liquid crystal polymer (brand: VECTRA A150), 40 parts of polyvinylidene fluoride, and 100 parts of organic solvent.

[0073] 2. Preparation of superhydrophobic anti-corrosion and anti-scale coating

[0074] The metal substrate is sprayed at a constant temperature of 50°C, and then the coating of this example is placed in a programmed temperature control box and heated at 200°C for 10 minutes, then heated to 260°C for 30 minutes, and then cooled naturally to room temperature.

[0075] 3. Determination of coating properties

[0076] Hydrophobicity: The contact angle between the surface of the coating prepared in this example and a 10 μL deionized wat...

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Abstract

The invention discloses a bionic super-hydrophobic anti-corrosion and anti-scaling coating, which is characterized in that the raw materials for coating the coating include nano-anion powder, nano-scale and / or micron-scale fibers, bioadhesives, low Surface energy modifiers, high surface tension polymers, fluoropolymers, water and organic solvents; solve the poor anti-corrosion and scale inhibition performance of existing artificial super-hydrophobic coatings in strong acid, strong alkali or high-salt oilfield production fluid medium environment The problem.

Description

technical field [0001] The invention relates to a super-hydrophobic anti-corrosion and anti-scale coating and a preparation method thereof. Background technique [0002] The ASP flooding technology injects strong / weak alkali into the formation during the oil production process, which destroys the rock formation, and at the same time increases the corrosiveness of the oilfield produced fluid, resulting in more serious corrosion of the oil well pipe, sucker rod and downhole tools. scale phenomenon. Therefore, the key to solving the problem of corrosion and scaling of oil well pipes and rods in harsh environments lies in the development of coating materials with excellent anti-corrosion and anti-scaling properties. [0003] The wettability of the coating surface is the key to its anti-corrosion and scale-inhibiting performance, and the surface easily wetted by the solution reduces the thermodynamic barrier for nucleation and scaling. Therefore, substrates with low surface ene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D201/00C09D127/18C09D127/16C09D5/08C09D7/61C09D7/63
CPCC09D5/08C09D201/00C09D7/61C09D7/63C09D7/70C08L27/18C08K13/04C08K7/06C08K7/08C08K3/38C08K3/00C08K5/18C08K5/5406C08K3/041C08L27/16C08K3/30C08K5/095
Inventor 刘战剑汪怀远张曦光王池嘉袁瑞霞刘发堂
Owner QINGYANG ZHOUYANG MACHINERY MFG
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