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Pipeline coating and preparation method thereof

A coating and pipeline technology, applied in the field of pipeline coating and its preparation, can solve the problems of coating cracking, moisture resistance, poor weather resistance, etc., and achieve the effect of reducing coating thickness, reducing surface temperature, and connecting firmly

Active Publication Date: 2018-12-21
江苏吉庆管材集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If alkali metal silicate is used alone as the base material of the coating, the coating film will not be water-resistant, moisture-resistant, and weather-resistant, and the coating will be prone to cracking, powder removal and other undesirable phenomena.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] As a kind of preferred scheme, a kind of preparation method of pipeline coating comprises the following steps:

[0032] Step 1. Dissolving the MOFs powder in an organic solvent, and using an ultrasonic instrument to evenly disperse the MOFs powder in the organic solvent to obtain a clear solution;

[0033] Step 2. Add vermiculite powder to the clarified solution obtained in step 1, and continue to stir until the vermiculite powder is evenly dispersed in the solution to obtain a suspension;

[0034] Step 3. Add a binder to the suspension obtained in step 2, continue stirring, and spray granulate to obtain a powder with a particle size of 10-30 μm;

[0035] Step 4. Spray the powder obtained in step 3 on the surface of the pipe by plasma spraying to form a pipe coating.

[0036] As a preferred solution, in the plasma spraying of step 4, the center temperature of the plasma arc is 2×10 4 K, the powder injection speed is 1Mach.

[0037] As a preferred solution, the organi...

Embodiment 1

[0039] Embodiment 1: a kind of pipeline coating, preparation steps are as follows:

[0040] Step 1. Dissolve 10 parts of MOF-5 powder in 40 parts of ethanol, and use an ultrasonic instrument to evenly disperse the MOF-5 powder in ethanol to obtain a clear solution;

[0041] Step 2. Add 20 parts of vermiculite powder to the clarified solution obtained in step 1, and continue to stir for 30 minutes, so that the vermiculite powder is evenly dispersed in the solution to obtain a suspension;

[0042] Step 3. Add polyvinyl alcohol to the suspension obtained in step 2, continue to stir, and use a spray tower to spray and granulate the suspension to obtain a powder with a particle size of 10-30 μm;

[0043] Step 4. The temperature at the center of the plasma arc is 2 x 10 4 In the case of K and He protection, the powder prepared in step 3 is plasma sprayed at a spraying speed of 1 Mach, so that the powder is deposited on the pipeline and stacked layer by layer, thereby forming a pipe...

Embodiment 2

[0044] Embodiment 2: a kind of pipeline coating, preparation steps are as follows:

[0045] Step 1. Dissolve 15 parts of MOF-6 powder in 45 parts of glycerol, and use an ultrasonic instrument to evenly disperse the MOF-6 powder in glycerol to obtain a clear solution;

[0046] Step 2. Add 30 parts of vermiculite powder to the clarified solution obtained in step 1, and continue to stir for 30 minutes, so that the vermiculite powder is evenly dispersed in the solution to obtain a suspension;

[0047] Step 3. Add organosilicon to the suspension obtained in step 2, continue to stir, and use a spray tower to spray and granulate the suspension to obtain a powder with a particle size of 10-30 μm;

[0048] Step 4. The temperature at the center of the plasma arc is 2 x 10 4 In the case of K and He protection, the powder prepared in step 3 is plasma sprayed at a spraying speed of 1 Mach, so that the powder is deposited on the pipeline and stacked layer by layer, thereby forming a pipeline...

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Abstract

The invention relates to the technical field of gas pipeline fire prevention, in particular to a pipeline coating and a preparation method thereof. The pipeline coating is prepared from MOFs, vermiculite, an organic solvent and a bonding agent. The preparation method of the pipeline coating comprises the steps of dissolving the MOFs powder in the organic solvent to obtain a settled solution; adding vermiculite powder into the settled solution to obtain suspension liquid; adding the bonding agent into the suspension liquid and conducting spray granulation to obtain powder; spraying the powder onto the surface of a pipeline through a plasma spraying method to form the pipeline coating. The connection strength of the coating and metal is reinforced through powerful chemical bonds formed between the MOFs and the metal, and the phenomenon of powder stripping of the coating is avoided. As the MOFs is formed by arranging long-rage ordered crystal grains in microstructure, the pipeline coatinghas the good compactness, and the problem of cracking of the coating is solved. Meanwhile, through combination with the vermiculite, the pipeline coating can release crystal water contained in vermiculite layers when heated, thereby achieving the fire prevention effect.

Description

technical field [0001] The invention relates to the technical field of gas pipeline fire protection, in particular to a pipeline coating and a preparation method thereof. Background technique [0002] MOFs is the abbreviation of metal organic framework compound (English name Metal organic Framework). It is a kind of crystalline porous material with periodic network structure formed by the interconnection of inorganic metal centers (metal ions or metal clusters) and bridging organic ligands through self-assembly. MOFs is an organic-inorganic hybrid material, also known as a coordination polymer, which is different from both inorganic porous materials and general organic complexes. It has both the rigidity of inorganic materials and the flexibility of organic materials. It presents great development potential and attractive development prospects in modern materials research. [0003] In recent years, with the rapid development of the construction industry, fire prevention a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/04
CPCC23C4/04C23C4/134
Inventor 朱加祥霍同娟吴耀洪
Owner 江苏吉庆管材集团有限公司
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