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Sintered porous coating pipe for strengthening flow boiling and preparation method of sintered porous coating pipe

A technology of porous coating and coating slurry, which is applied in the direction of coating, metal material coating technology, heat exchange equipment, etc., can solve the problems of high production cost, inability to apply pipes, and difficulty in large-scale production, and achieve low cost, Effects of increasing boiling heat transfer coefficient and improving stability

Active Publication Date: 2021-11-09
中国空气动力研究与发展中心设备设计与测试技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a sintered porous coating tube with enhanced flow boiling and its preparation method, so as to solve the problem that the traditional porous coating preparation process cannot be applied to the tube The inner surface, and the production cost is high, and it is difficult to achieve mass production

Method used

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  • Sintered porous coating pipe for strengthening flow boiling and preparation method of sintered porous coating pipe
  • Sintered porous coating pipe for strengthening flow boiling and preparation method of sintered porous coating pipe
  • Sintered porous coating pipe for strengthening flow boiling and preparation method of sintered porous coating pipe

Examples

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Effect test

Embodiment 1

[0046] Such as figure 1 Shown is a sintered porous coating tube with enhanced flow boiling and a preparation method thereof, comprising the following steps:

[0047] Pretreatment of metal pipes;

[0048] Coating a coating slurry containing metal particles on the surface of the metal pipe;

[0049] Sintering the metal pipe at high temperature to obtain the sintered porous coating pipe;

[0050] Wherein, the method of coating the coating slurry on the inner surface of the metal pipe is to close the first end of the metal pipe, and pour the coating slurry from the second end of the metal pipe until the coating slurry Fill the metal pipe with material, and after standing still, open the first end of the metal pipe to release excess coating slurry.

[0051] In some embodiments, anodic corrosion is performed on the surface of the sintered porous coating tube, the solution of the anode corrosion is dilute sulfuric acid or dilute hydrochloric acid, the cathode is graphite, and the ...

Embodiment 2

[0057] On the basis of Example 1, this example proposes a method for preparing the stainless steel particle sintered porous coating ST45U on the inner surface of a stainless steel tube with an inner diameter of 4mm. The specific preparation method includes the following steps:

[0058] Step 1: Surface pretreatment of stainless steel pipes. Place a 1m long stainless steel tube in absolute ethanol, ultrasonically clean it for 15 minutes, then take it out and put it in an ultrasonic cleaning pool of deionized water for 20 minutes, and finally put it in a custom-made drying oven to dry for 30 minutes;

[0059] Step 2: preparing coating slurry with uniform dispersion of stainless steel particles. Take 5g of 1.5% methylcellulose aqueous solution, 180ml of absolute ethanol, and 20ml of 1% zinc stearate-ethanol solution in a 300ml beaker. Then take 150 g of stainless steel cutting particles with a central particle size distribution of 45 μm and mix them with the above solution, place...

Embodiment 3

[0066] In this example, on the basis of Example 1, a layer of stainless steel powder sintered porous coating tube ST45U20R is prepared on the inner surface of a stainless steel tube with an inner diameter of 4 mm by adding spherical stainless steel particles with a smaller particle size. The specific preparation method includes the following steps:

[0067] Step 1: Surface pretreatment of stainless steel pipes. Place a 1m long stainless steel tube in absolute ethanol, ultrasonically clean it for 15 minutes, then take it out and place it in an ultrasonic cleaning pool of deionized water for 20 minutes, and finally put it in a custom-made drying oven to dry for 30 minutes.

[0068] Step 2: preparing coating slurry with uniform dispersion of stainless steel particles. Take 5g of 1.5% methylcellulose aqueous solution, 180ml of absolute ethanol, and 20ml of 1% zinc stearate-ethanol solution in a 300ml beaker. Then take 100g of stainless steel cutting particles with a central parti...

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Abstract

The invention discloses a preparation method of a sintered porous coating pipe for strengthening flow boiling. The preparation method comprises the following steps: coating the surface of a metal pipe with coating slurry containing metal particles, and sintering the metal pipe at high temperature to obtain the sintered porous coating pipe, wherein the coating mode of the coating slurry on the inner surface of the metal pipe is that the first end of the metal pipe is closed, the coating slurry is injected from the second end of the metal pipe until the metal pipe is filled with the coating slurry, and after standing, the first end of the metal pipe is opened to discharge redundant coating slurry. The preparation method is lower in cost, large-scale production of the sintered porous coating pipe is facilitated, the prepared sintered porous coating pipe is provided with the micro-nano porous metal coating which is uniform in metal particle distribution and firm and does not fall off, the flow boiling heat transfer coefficient in the pipe can be increased by multiple times, and the method has wide application prospects in the fields of nuclear energy, aerospace, high-power device heat dissipation and the like.

Description

technical field [0001] The invention relates to the field of flow boiling enhanced heat transfer, surface coating and surface hydrophilic-hydrophobic modification technology, in particular to a method for preparing a micro-nano-scale sintered porous coating on the surface of a pipeline, and a sintered porous coated pipe prepared by the method. The porous coating pipe is suitable for fluids at normal temperature and above. Background technique [0002] Flow boiling enhanced heat transfer is a key technology to solve the temperature control problem of high-power devices and maintain temperature uniformity. Metal materials such as copper, aluminum and stainless steel are widely used to process various heat transfer modules, which are used in different thermal control devices. Even in the field of semiconductors, metal-semiconductor heterojunctions are constructed by means of magnetron sputtering, and then processed into microchannel heat sinks, which facilitates the implementa...

Claims

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Application Information

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IPC IPC(8): C23C24/10F28F13/18
CPCC23C24/103F28F13/185
Inventor 陈景祥郭开开李蔚
Owner 中国空气动力研究与发展中心设备设计与测试技术研究所
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