Fluorine-containing coating as well as preparation method and application thereof

A technology of fluorine-containing coating and fluorine plastic, which is used in coatings, anti-corrosion coatings, devices for coating liquids on surfaces, etc. Adhesion, the effect of reducing frictional resistance loss

Pending Publication Date: 2022-07-15
AERO ENGINE ACAD OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the solution of using gallium-indium-tin alloy liquid metal for heat exchange, because the gallium element will chemically react with commonly used heat exchanger materials, such as brass and aluminum, the plate will soften and fail; the existing anti-corrosion methods cannot ensure the effect, and must be used Coatings provide physical isolation to avoid corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) a fluorine-containing mixture, consisting of polytetrafluoroethylene powder and nano-graphite powder, wherein the consumption of polytetrafluoroethylene powder and nano-graphite powder is 52.4kg;

[0031] (2) A fluorine-containing coating, comprising the above-mentioned fluorine-containing mixture; the preparation steps of the fluorine-containing coating are as follows: weighing 52.4 kg of polytetrafluoroethylene powder, 52.4 kg of nano-graphite powder, 157.2 kg of distilled water, polyoxyethylene fatty alcohol Ether surfactant 0.62kg; firstly, teflon powder and nano-graphite powder were mixed in the pool, then distilled water and surfactant were mixed and poured into the pool, and an electric stirrer was used to stir clockwise at 30rpm for 2 After stirring, a uniform coating emulsion is obtained, that is, a fluorine-containing coating is obtained; (there should be no visible graphite groups or polytetrafluoroethylene groups in the finally obtained coating emulsion)....

Embodiment 2

[0037] (1) a fluorine-containing mixture, consisting of polytetrafluoroethylene powder and nano-graphite powder, wherein the consumption of polytetrafluoroethylene powder is 60kg, and the consumption of nano-graphite powder is 40kg;

[0038] (2) A fluorine-containing coating, comprising the above-mentioned fluorine-containing mixture; the preparation steps of the fluorine-containing coating are as follows: weighing 60 kg of polytetrafluoroethylene powder, 40 kg of nano-graphite powder, 192 kg of distilled water, and surface active polyoxyethylene fatty alcohol ether First, mix the PTFE powder and the nano-graphite powder in the pool, then mix the distilled water and the surfactant, and pour it into the pool. Use an electric stirrer to stir clockwise at 30 rpm for 2 hours, and then stir. Then, a uniform coating emulsion is obtained, that is, a fluorine-containing coating is obtained; (there should be no graphite groups or polytetrafluoroethylene groups visible to the naked eye i...

Embodiment 3

[0044] (1) a fluorine-containing mixture, consisting of polytetrafluoroethylene powder and nano-graphite powder, wherein the consumption of polytetrafluoroethylene powder is 45kg, and the consumption of nano-graphite powder is 55kg;

[0045] (2) a fluorine-containing coating, comprising the above-mentioned fluorine-containing mixture; the preparation steps of the fluorine-containing coating are as follows: weighing 45 kg of polytetrafluoroethylene powder, 55 kg of nano-graphite powder, 135 kg of distilled water, and surface active polyoxyethylene fatty alcohol ether First, mix the PTFE powder and nano-graphite powder in the pool, then mix the distilled water and the surfactant, pour it into the pool, and use an electric stirrer to stir for 2 hours at a clockwise speed of 40 rpm. Then, a uniform coating emulsion is obtained, that is, a fluorine-containing coating is obtained; (there should be no graphite groups or polytetrafluoroethylene groups visible to the naked eye in the fi...

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Abstract

The invention belongs to the technical field of heat exchangers, and particularly relates to a fluorine-containing coating and a preparation method and application thereof. The fluorine-containing mixture is composed of fluoroplastic and nano graphite powder; according to the mass percentage, the fluoroplastic accounts for 45-60%, and the balance is the nano graphite powder; the fluorine-containing coating is composed of the fluorine-containing mixture. The preparation method comprises the following steps: uniformly mixing the nano graphite powder, the fluoroplastic, the distilled water and the surfactant to obtain the fluorine-containing coating; the prepared fluorine-containing coating is used for corrosion prevention of the liquid metal-liquefied gas heat exchanger, the fluorine-containing coating can achieve isolation between liquid metal and a heat exchanger material, and corrosion of the liquid metal to a copper or aluminum heat exchanger plate is avoided. Meanwhile, the lower surface friction coefficient of the fluorine-containing coating can remarkably reduce the frictional resistance loss of the liquid metal side, and liquid metal oxide is prevented from being deposited on the surface of the heat exchanger.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers, and in particular relates to a fluorine-containing coating and a preparation method and application thereof. Background technique [0002] Due to the aerodynamic heating effect of the aviation turbine engine, the flight limit is limited to Ma2.5. To increase the flight speed of the turbine, one of the main solutions is to use a heat exchanger to cool the ram intake air, offset the high temperature intake air caused by the aerodynamic heating effect during high-speed flight, and then increase the turbine speed. [0003] For the scheme of using gallium indium tin alloy liquid metal for heat exchange, due to the chemical reaction between gallium element and commonly used heat exchanger materials, such as brass and aluminum, the plate softens and fails; the existing anticorrosion methods cannot ensure the effect, and must be used. The paint is physically isolated to avoid corrosion. In addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18C09D5/08C09D7/61B05D7/14
CPCC09D127/18C09D5/08C09D7/61B05D7/14B05D2506/10B05D2601/20C08K2201/011C08K3/04
Inventor 朱江楠马薏文周琨苗辉
Owner AERO ENGINE ACAD OF CHINA
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