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Preparation method of metal substrate heat insulating protective coating structure and metal substrate heat insulating protective coating structure

A technology for metal substrates and protective coatings, applied in coatings, devices for coating liquids on surfaces, epoxy resin coatings, etc., can solve problems such as limited chemical bond strength, damage to heat insulation and protective coatings, and corrosion of equipment and pipelines , to achieve excellent waterproof effect, good anti-corrosion effect and anti-corrosion effect

Active Publication Date: 2020-09-01
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, metal substrates such as equipment and pipelines are often protected by thermal insulation coatings, etc. The heat loss caused by improper thermal insulation protection and the corrosion of metal substrates affect the operation safety of various fields, especially the petrochemical field.
In the prior art, water-based inorganic thermal insulation coatings are generally used for thermal insulation protection. Water-based inorganic thermal insulation coatings have the characteristics of environmental protection, flame retardancy, temperature resistance, simple construction, gap filling, and warm construction. They are used in petrochemical equipment and Pipelines and municipal pipe networks have good application prospects; however, the following problems generally exist in water-based inorganic coatings: due to the limited chemical bond strength between the silicon-based component of the thermal insulation protective coating and the metal substrate, the fluidity of the water-based coating before drying leads to thermal insulation coatings and The adhesive force on the surface of the equipment pipeline is small and it is easy to fall off; after the thermal insulation protective coating is partially damaged and the hydrophobicity is reduced, the external precipitation enters the loose porous structure of the thermal insulation protective coating, which reduces the thermal insulation performance of the thermal insulation protective coating and causes Corrosion of equipment pipelines affects the operation safety of metal substrates

Method used

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  • Preparation method of metal substrate heat insulating protective coating structure and metal substrate heat insulating protective coating structure
  • Preparation method of metal substrate heat insulating protective coating structure and metal substrate heat insulating protective coating structure
  • Preparation method of metal substrate heat insulating protective coating structure and metal substrate heat insulating protective coating structure

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preparation example Construction

[0047] A method for preparing a metal substrate thermal insulation protective coating structure, comprising the following steps:

[0048] 1) Surface treatment of the metal substrate: removing impurities attached to the surface of the metal substrate 100;

[0049]2) Setting metal mesh: covering a layer of metal mesh 10 on the surface of the metal substrate 100, and a plurality of meshes 11 are arranged on the metal mesh 10;

[0050] 3) Setting the insulation layer: coating the insulation paint at least partially in the grid 11 of step 2) to form the insulation layer 20;

[0051] 4) Installing a protective layer: spraying a protective paint on the outside of the thermal insulation layer 20 in step 3) to form a protective layer 30 .

[0052] The thickness of the metal mesh 10 in the step 2) is 0.2-0.6 mm, the aperture size of the mesh 11 is 4-10 mm, and the metal material used in the metal mesh 10 is more active than the metal material used in the metal substrate. The activity ...

Embodiment 1

[0063] The thermal insulation and protective coating structure of the metal substrate in this embodiment is used for thermal insulation and protection of the metal substrate 100. The metal substrate 100 is a carbon steel pipe. The thermal insulation and protective coating structure of the metal substrate includes in turn from the inside to the outside: metal The mesh 10 , the insulation layer 20 and the protective layer 30 , the metal mesh 10 is covered on the outside of the metal substrate 100 , and the metal mesh 10 is attached to the metal substrate 100 and arranged.

[0064] The metal mesh 10 is provided with a plurality of grids 11, the grids 11 are diamond-shaped holes with diagonals of 8mm and 4mm respectively, the metal mesh 10 is an aluminum grid, and the insulation layer 10 is partially located in the grid 11. The thickness of the metal mesh 10 is 0.6mm; the insulation layer 20 is formed by thermal insulation coating, and the thermal insulation coating is mainly compo...

Embodiment 2

[0075] The thermal insulation and protective coating structure of the metal substrate in this embodiment is used for thermal insulation and protection of the metal substrate 100. The metal substrate 100 is a carbon steel pipe. The thermal insulation and protective coating structure of the metal substrate includes in turn from the inside to the outside: metal The mesh 10 , the insulation layer 20 and the protective layer 30 , the metal mesh 10 is covered on the outside of the metal substrate 100 , and the metal mesh 10 is attached to the metal substrate 100 and arranged.

[0076] The metal mesh 10 is provided with a plurality of grids 11, the grids 11 are diamond-shaped holes with diagonals of 8mm and 4mm respectively, the metal mesh 10 is an aluminum grid, and the insulation layer 10 is partially located in the grid 11. The thickness of the metal mesh 10 is 0.4mm; the insulation layer 20 is formed by thermal insulation coating, and the thermal insulation coating is mainly compo...

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Abstract

The invention relates to the technical field of metal substrate heat insulating protection, in particular to a preparation method of a metal substrate heat insulating protective coating structure andthe metal substrate heat insulating protective coating structure. The preparation method of the metal substrate heat insulating protective coating structure includes the following steps of 1), surfacetreatment of a metal substrate; 2), arrangement of a metal net; 3), arrangement of a heat insulating layer; and 4), arrangement of a protective layer. According to the preparation method of the metalsubstrate heat insulating protective coating structure and the metal substrate heat insulating protective coating structure, the binding force between the metal substrate and the metal substrate heatinsulating protective coating structure on the metal substrate is large, when external water enters the heat insulating layer, the metal net can be used as a sacrificial anode, the metal substrate isused as a cathode, the water is used as a conducting medium, a circuit is formed, the metal net achieves the effect of protecting the sacrificial anode, and therefore the metal substrate is preventedfrom being corroded.

Description

technical field [0001] The invention relates to the technical field of heat preservation and protection of metal substrates, in particular to a method for preparing a heat preservation and protection coating structure of metal substrates and a heat preservation and protection structure of metal substrates. Background technique [0002] In the prior art, metal substrates such as equipment and pipelines are often protected by thermal insulation coatings. The heat loss caused by improper thermal insulation protection and the corrosion of metal substrates affect the operation safety of various fields, especially the petrochemical field. In the prior art, water-based inorganic thermal insulation coatings are generally used for thermal insulation protection. Water-based inorganic thermal insulation coatings have the characteristics of environmental protection, flame retardancy, temperature resistance, simple construction, gap filling, and warm construction. They are used in petroch...

Claims

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Application Information

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IPC IPC(8): B05D3/00B05D7/14B05D7/24B05D1/36B05D5/00C09D1/00C09D7/61C09D163/00C09D183/04
CPCB05D3/002B05D7/14B05D7/24B05D7/58B05D5/00C09D1/00C09D7/61C09D7/70C09D163/00C23F13/16C08L83/04
Inventor 张耀王焕焕夏渊官自超
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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