Pipeline or pipe fitting provided with silicon carbide ceramic abrasion-resisting and corrosion-resisting liner and preparation method thereof

A silicon carbide ceramic, ceramic layer technology, applied in ceramic products, pipes/pipe joints/pipes, pipe protection, etc., can solve the problems of short service life and low reliability, reduce production costs, extend service life, extend The effect of using the cycle

Active Publication Date: 2017-07-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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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 pipeline or pipe fitting with silicon carbide ceramic wear-resistant and corrosion-resistant lining and its preparation method, which is used to solve the problems of low reliability and short service life of the transportation pipeline or pipe fitting system in the prior art, Reduce pollutant emissions from thermal power generation and other enterprises

Method used

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  • Pipeline or pipe fitting provided with silicon carbide ceramic abrasion-resisting and corrosion-resisting liner and preparation method thereof
  • Pipeline or pipe fitting provided with silicon carbide ceramic abrasion-resisting and corrosion-resisting liner and preparation method thereof

Examples

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Effect test

Embodiment 1

[0055] In this embodiment, the method for preparing a wear-resistant and corrosion-resistant pipe or pipe fitting with dual ceramic linings includes the following steps:

[0056] (1) According to the mass ratio, phenolic resin: silicon carbide particles (average diameter 10μm): hexamethylenetetramine=100:140:5, mix the above raw materials, and ball mill for 1 hour to obtain powder. The materials are evenly mixed without obvious agglomeration;

[0057] (2) Prepare liquid thin slurry with the mass ratio of the powder obtained in (1): powder: alcohol=100:200, and then fully soak the foam with a thickness of 5mm in the slurry and squeeze the excess slurry. Air dry at 120°C. After air drying, the sample is immersed in the slurry again, and the excess slurry between the holes is blown off, and then air dried at a high temperature of 120°C. Repeat the above steps 5 times to obtain the required foam ceramic layer precursor;

[0058] (3) The material powder obtained in (1) is prepared in a...

Embodiment 2

[0064] In this embodiment, the method for preparing a wear-resistant and corrosion-resistant pipe or pipe fitting with dual ceramic linings includes the following steps:

[0065] (1) According to the mass ratio, epoxy resin: silicon carbide particles: citric acid = 100:50:5 ratio of mixing the above raw materials, ball milling for 2 hours to obtain a slurry; the particle size of the silicon carbide particles is 2 microns;

[0066] (2) Prepare a liquid thin slurry with the material powder obtained in (1) at a mass ratio (material powder: alcohol = 100: 250), and then fully soak the foam with a thickness of 5 mm in the slurry and squeeze the excess slurry. Air dry at 120°C. After air drying, the sample is immersed in the slurry again, and the excess slurry between the holes is blown off, and then air dried at a high temperature of 120°C. Repeat the above steps 5 times to obtain the required foam ceramic layer precursor;

[0067] (3) The material powder obtained in (1) is prepared in ...

Embodiment 3

[0073] In this embodiment, the method for preparing a wear-resistant and corrosion-resistant pipe or pipe fitting with dual ceramic linings includes the following steps:

[0074] (1) According to the mass ratio, phenolic resin: silicon carbide particles: p-toluenesulfonic acid = 100:50:5 ratio is mixed with the above raw materials, ball milled for 2 hours to obtain slurry; the silicon carbide particles have a particle size of 2 microns.

[0075] (2) Prepare a liquid thin slurry with the material powder obtained in (1) in a mass ratio (material powder: alcohol = 100: 300), and then fully soak the foam with a thickness of 5 mm in the slurry and squeeze the excess slurry. Air dry at 120°C. After air drying, the sample is immersed in the slurry again, and the excess slurry between the holes is blown off, and then air dried at a high temperature of 120°C. Repeat the above steps 5 times to obtain the required foam ceramic layer precursor;

[0076] (3) The material powder obtained in (1) ...

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Abstract

The invention relates to a metal pipeline or pipe fitting surface abrasion-resisting and anticorrosion protection technology, in particular to a pipeline or pipe fitting provided with a silicon carbide ceramic abrasion-resisting and corrosion-resisting liner and a preparation method thereof. The pipeline or the pipe fitting is composed of the abrasion-resisting and corrosion-resisting liner and a metal layer from inside to outside. The abrasion-resisting and corrosion-resisting liner is composed of a surface layer and a compounded layer. The surface layer is a compact ceramic layer. The compounded layer is a foam ceramic layer and directly grows on the back face of the compact ceramic layer. The preparation process comprises the following steps of preparation of mixed powder, preparation of slurry, preparation of a foam precursor in a tape casting mode, bonding, thermocuring forming in a mould, machining, bonding forming, pyrolysis, sintering, and compounding to obtain afinished product. According to the ceramic liner abrasion-resisting and corrosion-resisting pipeline or pipe fitting prepared through the preparation method, the abrasion-resisting service life can be five to ten times that of a rubber-lined abrasion-resisting layer, the resistance to acid and alkaline corrosion and high-temperature impact is excellent, the replacement period of the pipeline or pipe fitting can be effectively prolonged, accordinglythe operation cost of enterprises is lowered, and emission of particulate pollutants is reduced.

Description

Technical field [0001] The invention relates to a wear-resistant and anti-corrosion protection technology for the surface of metal pipes or pipe fittings, in particular to a pipe or pipe fitting with a silicon carbide ceramic wear-resistant and corrosion-resistant lining and a preparation method thereof, using a dense ceramic layer with double ceramic layers and double continuous phases -Foam ceramic layer / polymer composite material modifies the surface of metal pipes or fittings for wear and corrosion. Background technique [0002] Metal pipes or pipe fittings are the most widely used structural parts in modern industry. In the process of use, pipes or pipe fittings often bear the erosion and corrosion of medium particles, such as: used for transmission in thermal power plants, mines and petrochemical enterprises Mud, dusty materials, corrosive gas, liquid metal pipes or pipe fittings, valves, pump bodies and other auxiliary equipment. Wear and corrosion are two important facto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/14F16L58/14F16L57/06C04B38/06C04B35/565C04B35/622
CPCC04B35/565C04B35/622C04B38/0615F16L9/14F16L57/06F16L58/14
Inventor 张劲松杨振明田冲徐兴祥金鹏刘强
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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