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Internal squeezing rapid coating method of pipe inner wall metal powder coating

A metal powder and tube inner wall technology, applied in coatings, devices for coating liquid on the surface, pretreatment of the surface, etc., can solve the problems of being unsuitable for high temperature or abrasive industrial and mining conditions, and achieve convenient process implementation. The coating thickness is convenient and the coating is uniform

Inactive Publication Date: 2012-07-04
SHAANXI TIANYUAN MATERIALS PROTECTION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For general corrosion problems, it is possible to apply polymer anti-corrosion coatings in metal pipes, but this method is not suitable for harsh corrosion environments, let alone high temperature or abrasive industrial and mining conditions; for wear problems, in addition to increasing the hardness of the body material to improve In addition to wear resistance, it is generally considered to coat the working surface with a high-hardness ceramic coating, but for erosion and corrosion wear in the pipeline, a better measure is to clad a layer of high-hardness corrosion-resistant alloy coating on the surface. One of the difficulties is to choose the appropriate coating method to obtain a uniform metal powder slurry coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this embodiment, a method for rapid coating of metal powder coating on the inner wall of a pipe comprises the following steps:

[0023] Step 1: Preliminary cleaning of the inner wall of the pipe to be coated: inject compressed air into the pipe to be coated to remove impurities in the pipe;

[0024] Step 2: Clean the inner wall of the pipe to be coated again: according to the inner diameter of the pipe to be coated, select a high-elastic wear-resistant rubber ball with a corresponding diameter to be fed from one end of the pipe to be coated, and sprayed out from the other end;

[0025] Step 3: Sandblasting to remove rust on the inner wall of the pipe to be coated: Use refined quartz sand with a particle size of 0.5 mm to be fed from one end of the pipe to be coated under the drive of compressed air, and sprayed out from the other end;

[0026] Step 4: Extrusion coating of pipe inner wall coating: including the following steps:

[0027] (1) FeO with a weight of 7.52K...

Embodiment 2

[0033] In this embodiment, a method for rapid coating of metal powder coating on the inner wall of a pipe comprises the following steps:

[0034] Step 1: Preliminary cleaning of the inner wall of the pipe to be coated: inject compressed air into the pipe to be coated to remove impurities in the pipe;

[0035] Step 2: Clean the inner wall of the pipe to be coated again: according to the inner diameter of the pipe to be coated, select a high-elastic wear-resistant rubber ball with a corresponding diameter to be fed from one end of the pipe to be coated, and sprayed out from the other end;

[0036] Step 3: Sandblasting to remove rust on the inner wall of the pipe to be coated: Use refined quartz sand with a particle size of 0.8 mm to be fed from one end of the pipe to be coated under the drive of compressed air, and sprayed out from the other end;

[0037] Step 4: Extrusion coating of pipe inner wall coating: including the following steps:

[0038] (1) FeO with a weight of 6.16K...

Embodiment 3

[0044] In this embodiment, a method for rapid coating of metal powder coating on the inner wall of a pipe comprises the following steps:

[0045] Step 1: Preliminary cleaning of the inner wall of the pipe to be coated: inject compressed air into the pipe to be coated to remove impurities in the pipe;

[0046] Step 2: Clean the inner wall of the pipe to be coated again: according to the inner diameter of the pipe to be coated, select a high-elastic wear-resistant rubber ball with a corresponding diameter to be fed from one end of the pipe to be coated, and sprayed out from the other end;

[0047] Step 3: Sandblasting to remove rust on the inner wall of the pipe to be coated: Use refined quartz sand with a particle size of 1.0 mm to be fed from one end of the pipe to be coated under the drive of compressed air, and sprayed out from the other end;

[0048] Step 4: Extrusion coating of pipe inner wall coating: including the following steps:

[0049] (1) Ni with a weight of 13.3Kg...

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Abstract

The invention discloses an internal squeezing rapid coating method of pipe inner wall metal powder coating. The method comprises the steps of firstly feeding compressed air into a pipe to be coated to clean impurities in the pipe, then selecting a high elastic wear-resisting rubber ball with a corresponding diameter according to the inner diameter of the pipe, feeding the high elastic wear-resisting rubber ball from one end of the pipe and ejecting the ball from the other end, feeding refined quartz sand from one end of the pipe and ejecting the refining quartz sand from the other end under the driving of the compressed air, so as to clean corrosion on the inner wall of the pipe, performing extrusion coating on the coating of the inner wall of the pipe, uniformly mixing metal powder and adhesive, so as to form stand-by coating slurry, installing a receiving extrusion coater at the tail end of the pipe, coating the metal coating through a spherical extrusion coater, and finally performing natural drying in the shade and vacuum drying on the pipe. The method of the invention can conveniently and rapidly realize the uniform coating of the metal powder slurry of the inner wall of the pipe and complete the slurry coating with required thickness in one time, so as to be convenient to carry out various sintering processes subsequently to obtain high-quality functional metal powder coating.

Description

technical field [0001] The invention relates to the technical field of powder coating on the inner wall of a pipe, in particular to an internal extrusion rapid coating method for the metal powder coating on the inner wall of a pipe. Background technique [0002] Corrosion and wear problems on the inner wall of metal pipes exist in many industries at present. For general corrosion problems, it is possible to apply polymer anti-corrosion coatings in metal pipes, but this method is not suitable for harsh corrosion environments, let alone high temperature or abrasive industrial and mining conditions; for wear problems, in addition to increasing the hardness of the body material to improve In addition to wear resistance, it is generally considered to coat the working surface with a high-hardness ceramic coating, but for erosion and corrosion wear in the pipeline, a better measure is to clad a layer of high-hardness corrosion-resistant alloy coating on the surface. One of the dif...

Claims

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Application Information

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IPC IPC(8): B05D7/22B05D3/00
Inventor 王春昌席生岐
Owner SHAANXI TIANYUAN MATERIALS PROTECTION TECH
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