CN116697193A - Prefabricated heat-insulating industrial pipeline with heat-insulating anti-corrosion coating and production method thereof - Google Patents
Prefabricated heat-insulating industrial pipeline with heat-insulating anti-corrosion coating and production method thereof Download PDFInfo
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- CN116697193A CN116697193A CN202310697414.3A CN202310697414A CN116697193A CN 116697193 A CN116697193 A CN 116697193A CN 202310697414 A CN202310697414 A CN 202310697414A CN 116697193 A CN116697193 A CN 116697193A
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- heat
- insulating
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- corrosion
- pipeline
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- 239000011248 coating agent Substances 0.000 title claims abstract description 104
- 238000000576 coating method Methods 0.000 title claims abstract description 104
- 238000005260 corrosion Methods 0.000 title claims abstract description 80
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 230000007797 corrosion Effects 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000009413 insulation Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000002987 primer (paints) Substances 0.000 claims description 81
- 238000005507 spraying Methods 0.000 claims description 65
- 239000007921 spray Substances 0.000 claims description 29
- 238000001035 drying Methods 0.000 claims description 28
- 239000003973 paint Substances 0.000 claims description 27
- 238000004321 preservation Methods 0.000 claims description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 13
- 229910052725 zinc Inorganic materials 0.000 claims description 12
- 239000011701 zinc Substances 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000004593 Epoxy Substances 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 8
- 230000000996 additive effect Effects 0.000 claims description 8
- 239000012767 functional filler Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 230000003749 cleanliness Effects 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 58
- 238000010521 absorption reaction Methods 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 9
- 239000011241 protective layer Substances 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 150000002500 ions Chemical class 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- -1 alcohol ester Chemical class 0.000 description 6
- 235000019832 sodium triphosphate Nutrition 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000011324 bead Substances 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- CUVLMZNMSPJDON-UHFFFAOYSA-N 1-(1-butoxypropan-2-yloxy)propan-2-ol Chemical compound CCCCOCC(C)OCC(C)O CUVLMZNMSPJDON-UHFFFAOYSA-N 0.000 description 4
- RNFAKTRFMQEEQE-UHFFFAOYSA-N Tripropylene glycol butyl ether Chemical compound CCCCOC(CC)OC(C)COC(O)CC RNFAKTRFMQEEQE-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 238000001694 spray drying Methods 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004005 microsphere Substances 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 3
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000011325 microbead Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000012720 thermal barrier coating Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
- F16L58/1072—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being a sprayed layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/18—Spheres
- C08L2205/20—Hollow spheres
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a prefabricated heat-insulating industrial pipeline with a heat-insulating anti-corrosion coating and a production method thereof. The anti-corrosion primer layer and the heat insulation coating are sequentially arranged on the outer surface of the pipeline body from inside to outside. Compared with the prior art, the invention provides the prefabricated heat-insulating industrial pipeline by arranging the anti-corrosion primer layer and the heat-insulating coating on the outer surface of the pipeline body, so that the installation period of the heat-insulating pipeline in the construction process of the industrial device can be effectively shortened; the heat-insulating and corrosion-preventing structural layer has the functions of low permeability, hydrophobicity, moisture resistance and chemical medium corrosion resistance, and can not absorb moisture and hydrolyze to generate corrosive ions, so that the problem of lower corrosion caused by water absorption and moisture absorption of the heat-insulating layer in the prior art can be avoided, and the structural type of 'the corrosion-preventing layer + the heat-insulating layer + the protective layer' of the heat-insulating industrial pipeline in the prior art is replaced.
Description
Technical Field
The invention belongs to the technical field of prefabricated heat-insulating industrial pipelines, and particularly relates to a prefabricated heat-insulating industrial pipeline with a heat-insulating anti-corrosion coating and a production method thereof.
Background
In the energy and chemical industry, in order to meet the requirements of energy conservation and emission reduction or personnel scalding prevention, an insulating layer is generally arranged on an industrial pipeline for conveying medium-temperature and high-temperature media so as to reduce the heat emitted to the surrounding environment in the process of conveying the media by the industrial pipeline.
At present, most of heat preservation industrial pipelines in production devices are of the structure type of 'anti-corrosion layer + heat preservation layer + protective layer', the protective layer in the structure cannot keep airtight and waterproof performance due to unavoidable joints and damage in the installation process, and especially the heat preservation layer has the characteristics of water absorption and moisture absorption, so that once water vapor enters the heat preservation layer through the protective layer, corrosion of a pipeline body under the heat preservation layer is caused, and the problem of Corrosion (CUI) under the heat preservation layer of the pipeline is caused.
In addition, in the construction process of industrial devices, the heat-insulating layer of the heat-insulating industrial pipeline is usually constructed after the pipeline is welded. And because the heat preservation layer has multilayer structure, the heat preservation construction process generally needs to be subjected to procedures such as primer coating, heat preservation layer bundling, protective layer installation and the like, the procedures are complex, time and labor are consumed, and the construction period of the device is greatly prolonged.
Therefore, a technical scheme capable of avoiding the problem of corrosion of the insulating layer of the insulating industrial pipeline is needed.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the prefabricated heat-insulating industrial pipeline with the heat-insulating anti-corrosion coating is provided to solve the problem that the heat-insulating layer of the existing heat-insulating industrial pipeline corrodes downwards.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the heat-insulating anti-corrosion coating prefabricated heat-insulating industrial pipeline comprises a pipeline body, an anti-corrosion primer layer and a heat-insulating coating, wherein the anti-corrosion primer layer and the heat-insulating coating are sequentially arranged on the outer surface of the pipeline body from inside to outside, the anti-corrosion primer layer is formed by spraying and drying anti-corrosion primer coating, and the heat-insulating coating is formed by spraying and drying heat-insulating coating;
the anticorrosive primer coating is a water-based epoxy iron oxide red primer, a water-based epoxy zinc-rich primer or a water-based inorganic zinc-rich primer;
the heat insulation coating comprises the following components in parts by mass: 30-35 parts of aqueous acrylic resin, 40-50 parts of functional filler, 10-30 parts of deionized water, 0.5-1 part of film forming additive and 0.2-0.5 part of dispersing agent.
Preferably, the pipe body is not provided with an anti-corrosion primer layer and an insulating coating at the weld interface areas of its axial ends. Through the arrangement, the pipeline body is provided with a welding interface area for pipeline welding. More preferably, the axial length of the weld interface area is 10-20 cm.
Preferably, the thickness of the anti-corrosion primer layer is 50-100 μm.
Preferably, the thickness of the thermal insulation coating is 3 to 5mm.
Preferably, the thermal insulation coating further comprises a top coating layer, wherein the top coating layer is arranged on the outer surface of the thermal insulation coating layer, and the top coating layer is formed by spraying and drying the top coating layer. Through the arrangement, the corresponding finish paint coating can be sprayed according to the surface color mark or the safety mark requirement of the heat preservation industrial pipeline.
Preferably, the top coating is a polyurethane coating or a fluorocarbon weather-resistant coating.
Preferably, the material of the pipeline body is carbon steel, low alloy steel or stainless steel.
Preferably, the pipeline body is a seamless steel pipe, a straight seam steel pipe or a spiral seam steel pipe.
Preferably, the nominal diameter of the pipeline body is DN 50-DN 1400, and the length of the pipeline body is 6m of the common sizing length of industrial pipelines.
Wherein, with respect to the corrosion resistant primer coating:
specifically, the anticorrosive primer coating is a water-based epoxy iron oxide red primer commonly used in the market, a water-based epoxy zinc-rich primer commonly used in the market or a water-based inorganic zinc-rich primer commonly used in the market;
the zinc powder in the zinc-rich primer coating can form a continuous and compact coating after the dry film of the coating, and can be closely contacted with metal. Since the potential of zinc is lower than that of steel when the coating film is corroded, zinc in the coating film is used as an anode and is corroded first, and the base steel is used as a cathode and is protected. The zinc is used as an oxidation product formed by the sacrificial anode to play a role in sealing the coating film, so that the protection of the coating film on the pipeline body is enhanced.
Wherein, with respect to the heat insulating coating:
in the invention, the water-based acrylic resin is mainly used for bonding the paint and the substrate, enhancing the strength of the paint and improving the physical properties of the paint including thermal expansion, cold contraction and flexibility, and the water-based acrylic resin has the performances of high temperature resistance, light and color retention, weather resistance, pollution resistance and the like.
Preferably, the functional filler is at least one of glass hollow microsphere, polystyrene hollow microsphere and nano silica hollow microsphere. In the invention, the function filler has the functions of enhancing the density of the paint, improving the heat insulation, namely the heat preservation and cold preservation of the paint, enhancing the corrosion resistance of the paint, and simultaneously preventing the invasion of high-temperature steam and harmful corrosive medium, thereby achieving the purpose of preventing and eliminating the lower corrosion.
Preferably, the glass hollow bead is 20-30 parts by mass, the polystyrene hollow bead is 20-30 parts by mass, and the nano silica hollow bead is 15-20 parts by mass.
Preferably, the film forming aid is one or more of dipropylene glycol butyl ether, tripropylene glycol butyl ether, alcohol ester twelve and alcohol ester sixteen. In the invention, the film forming additive is used for improving the leveling property of the coating and improving the temperature adaptability and the construction effectiveness of the coating.
Preferably, the dipropylene glycol butyl ether is 0.2-0.3 part by mass, the tripropylene glycol butyl ether is 0.2-0.3 part by mass, the alcohol ester twelve is 0.2-0.5 part by mass, and the alcohol ester sixteen is 0.2-0.5 part by mass.
Preferably, the dispersing agent is one or more of sodium silicate, sodium tripolyphosphate, potassium tripolyphosphate and sodium hexametaphosphate. In the present invention, the dispersant is used to maintain a uniform state during the production and transportation of the paint, prevent the agglomeration of the filler, the re-self-polymerization of the high molecular polymer, etc.
Preferably, the water glass is 0.1-0.2 part by mass, the sodium tripolyphosphate is 0.2-0.3 part by mass, the potassium tripolyphosphate is 0.2-0.3 part by mass, and the sodium hexametaphosphate is 0.1-0.2 part by mass.
In the present invention, the deionized water serves to dilute the coating and improve the application properties in the application of the coating.
The invention also provides a preparation method of the heat insulation coating, which comprises the following steps:
step S210, adding aqueous acrylic resin, deionized water, a film forming additive and a dispersing agent into a reaction kettle according to a formula to obtain a first mixed solution, and stirring the first mixed solution in the reaction kettle for the first time to obtain a mixed emulsion;
step S220, adding functional filler into the mixed emulsion in the reaction kettle to obtain a second mixed solution, and stirring the second mixed solution for the second time to obtain a paste material;
and S230, regulating the pH value of the paste material in the reaction kettle by using ammonia water to obtain the heat-insulating coating.
One of the purposes of the invention has the following beneficial effects: according to the invention, the anti-corrosion primer layer and the heat-insulating coating are arranged on the outer surface of the pipeline body, so that the heat-insulating anti-corrosion structure layer is formed on the outer surface of the pipeline body, and the prefabricated heat-insulating industrial pipeline is provided, and the installation period of the heat-insulating pipeline in the construction process of an industrial device can be effectively shortened. The heat-insulating and corrosion-preventing structural layer has the functions of low permeability, hydrophobicity, moisture resistance and chemical medium erosion resistance, and can not absorb moisture and hydrolyze to generate corrosive ions; and the heat-insulating layer with water absorption and moisture absorption characteristics is not arranged, so that the problem of corrosion caused by water absorption and moisture absorption of the heat-insulating layer in the prior art can be avoided, and the structure type of 'the anti-corrosion layer + the heat-insulating layer + the protective layer' of the heat-insulating industrial pipeline in the prior art is replaced.
The second object of the present invention is: aiming at the defects of the prior art, the production method of the heat-insulating industrial pipeline with the heat-insulating anti-corrosion coating is provided.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the production method of the heat-insulating industrial pipeline with the heat-insulating anti-corrosion coating, provided by any one of the purposes, comprises the following steps:
step S1, oil removal and scale removal are carried out on the outer surface of the pipeline body, and rust removal is carried out on the outer surface of the pipeline body until the surface cleanliness is greater than or equal to Sa2.5 level;
step S2, spraying an anti-corrosion primer coating on the outer surface of the pipeline body treated in the step S1 in a high-pressure airless spraying mode, and drying the sprayed anti-corrosion primer coating to form an anti-corrosion primer layer;
and S3, spraying a heat-insulating coating on the outer surface of the anticorrosive primer layer formed in the step S2 in a high-pressure airless spraying mode, and forming the heat-insulating coating by the sprayed heat-insulating coating in a solid manner.
Preferably, in step S2, further includes: the pipe body is not sprayed with anti-corrosion primer paint at the welding interface areas at the two axial ends of the pipe body. Through the arrangement, the pipeline body is provided with a welding interface area for pipeline welding.
Preferably, the high-pressure airless spraying mode is as follows: fixing the position of a spray gun of high-pressure airless spraying equipment, enabling a spraying area of the spray gun to correspond to a pipeline body, and enabling the pipeline body to axially move along the self and simultaneously enabling the pipeline body to circumferentially rotate along the self when the spray gun sprays; or fixing the position of the pipeline body, enabling the spraying area of the spray gun of the high-pressure airless spraying equipment to correspond to the pipeline body, and enabling the spray gun to move along the axial direction of the pipeline body and simultaneously enabling the spray gun to rotate along the circumferential direction of the pipeline body when the spray gun sprays. Through the arrangement, the coating can be uniformly sprayed. More preferably, the nozzle aperture of the spray gun is 0.4-0.8 mm; the distance between the nozzle and the pipeline body in the spraying process is 20-40 cm, and the pressure of the spray gun is 20MPa. More preferably, the spray gun has a nozzle aperture of 0.48mm; the distance between the nozzle and the pipe body during spraying was 25cm.
Preferably, in step S2, the anticorrosive primer paint is sprayed on the outer surface of the pipe body after the treatment in step S1, which includes: spraying the anticorrosive primer paint on the outer surface of the pipeline body treated in the step S1 for 1-2 times, wherein the next spraying is performed after the anticorrosive primer paint is dried; the thickness of the anti-corrosion primer layer formed by single spray coating and drying is 25-100 mu m.
Specifically, spraying the anticorrosive primer paint on the outer surface of the pipeline body treated in the step S1 for 2 times, wherein the next spraying is performed after the anticorrosive primer paint of the last time is dried; the thickness of the anticorrosion primer layer formed by single spray coating and drying is 35 mu m.
Preferably, in step S2, the sprayed anticorrosion primer coating is dried to form an anticorrosion primer layer, which includes: and heating and drying the sprayed anticorrosive primer coating until the sprayed anticorrosive primer coating is dried to form an anticorrosive primer layer, wherein the heating and drying temperature is 50-80 ℃. More preferably, the temperature at which the corrosion resistant primer coating is heated to be dried is 50 to 70 ℃. Through the arrangement, the real-drying time of the anti-corrosion primer coating is shortened, and the production rate of the heat-insulation industrial pipeline is improved.
Specifically, the temperature for heating and drying the anti-corrosion primer coating is 60 ℃, so that the real drying time after single spraying is not more than 3 hours.
Preferably, in step S3, a thermal insulation coating is sprayed on the outer surface of the anticorrosive primer layer formed by the solid drying in step S2, including: spraying the heat insulating paint for 5-12 times on the outer surface of the anti-corrosion primer layer formed by the step S2 in a real-drying way, wherein the next spraying is performed after the last heat insulating paint is dried in a real-drying way; the thickness of the heat-insulating coating formed by single spray coating and drying is 300-500 mu m.
Specifically, spraying the heat-insulating paint on the outer surface of the anti-corrosion primer layer formed in the step S2 for 10 times, wherein the next spraying is performed after the last heat-insulating paint is dried; the thickness of the heat-insulating coating formed by single spray drying was 300. Mu.m.
Preferably, in step S3, the sprayed heat-insulating coating is dried to form a heat-insulating coating, including: and heating and drying the sprayed heat-insulating coating until the sprayed heat-insulating coating is dried to form a heat-insulating coating, wherein the heating and drying temperature is 50-80 ℃. More preferably, the heat-insulating coating is heated to a temperature of 50 to 70 ℃. Through the arrangement, the actual drying time of the heat insulation coating is shortened, and the production rate of the heat insulation industrial pipeline is improved.
Specifically, the heat-insulating coating is heated and dried at a temperature of 60 ℃ so that the real drying time after a single spraying is not more than 3 hours.
Preferably, the method further comprises: and S4, spraying a finish paint on the outer surface of the heat-insulating coating formed in the step S3 in a high-pressure airless spraying mode, and forming the finish paint coating by the sprayed finish paint in a real-dry mode.
The second object of the present invention is at least the following advantageous effects:
1) According to the invention, the anti-corrosion primer layer and the heat-insulating coating are arranged on the outer surface of the pipeline body, so that the heat-insulating anti-corrosion structure layer is formed on the outer surface of the pipeline body, and the prefabricated heat-insulating industrial pipeline is provided, and the installation period of the heat-insulating pipeline in the construction process of an industrial device can be effectively shortened. The heat-insulating and corrosion-preventing structural layer has the functions of low permeability, hydrophobicity, moisture resistance and chemical medium erosion resistance, and can not absorb moisture and hydrolyze to generate corrosive ions; and the heat-insulating layer with water absorption and moisture absorption characteristics is not arranged, so that the problem of corrosion caused by water absorption and moisture absorption of the heat-insulating layer in the prior art can be avoided, and the structure type of 'the anti-corrosion layer + the heat-insulating layer + the protective layer' of the heat-insulating industrial pipeline in the prior art is replaced.
2) According to the invention, the coating is sprayed on the outer surface of the pipeline body, so that the heat-insulating industrial pipeline can realize the dual functions of corrosion resistance and heat insulation; meanwhile, the high-pressure airless spraying mode is adopted, so that the spraying efficiency of the pipeline is improved; in addition, as the paint mist sprayed by high-pressure airless spraying does not contain compressed air, impurities in the compressed air can be prevented from entering the coating, and the quality of the coating is improved;
3) The heat-insulating industrial pipeline is a prefabricated heat-insulating industrial pipeline, so that only pipeline welding is needed to be completed on a pipeline construction site, and the construction period and labor cost of the device can be greatly saved.
Drawings
FIG. 1 is an axial view of a pipe body according to the present invention; wherein, the top of pipeline body is provided with the spray gun that the spraying was used in the picture, and the A direction is the circumference direction of pipeline body in the picture.
FIG. 2 is a side view of FIG. 1; wherein, the direction B in the figure is the axial direction of the pipeline body.
In the figure: 1-a pipeline body; 2-an anti-corrosion primer layer; 3-a thermal barrier coating; 4-spray gun.
Detailed Description
In order to make the technical scheme and advantages of the present invention more apparent, the present invention and its advantageous effects will be described in further detail below with reference to the detailed description and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Example 1
As shown in fig. 1 to 2, the heat-insulating and corrosion-resistant coating prefabricated heat-insulating industrial pipeline comprises a pipeline body 1, a corrosion-resistant primer layer 2 and a heat-insulating coating 3, wherein the corrosion-resistant primer layer 2 and the heat-insulating coating 3 are sequentially arranged on the outer surface of the pipeline body 1 from inside to outside, the corrosion-resistant primer layer 2 is formed by spraying and drying a corrosion-resistant primer coating, and the heat-insulating coating 3 is formed by spraying and drying a heat-insulating coating;
the anticorrosion primer coating is JT-266D waterborne epoxy zinc-rich primer of Guangzhou Jitai;
the heat insulation coating comprises the following components in parts by mass: 35 parts of aqueous acrylic resin, 40 parts of functional filler, 10 parts of deionized water, 1 part of film forming additive and 0.4 part of dispersing agent;
specifically: the functional filler comprises the following components in parts by mass: 20 parts of hollow glass beads and 20 parts of hollow nano silica beads; the film forming additive comprises the following components in parts by mass: 0.2 part of dipropylene glycol butyl ether, 0.2 part of tripropylene glycol butyl ether, twelve 0.2 parts of alcohol ester and sixteen 0.4 parts of alcohol ester; the dispersing agent comprises the following components in parts by mass: sodium tripolyphosphate 0.2 parts and potassium tripolyphosphate 0.2 parts.
The production method of the heat-insulating and corrosion-preventing coating prefabricated heat-insulating industrial pipeline comprises the following steps:
step S1, oil removal and scale removal are carried out on the outer surface of the pipeline body 1, and rust removal is carried out on the outer surface of the pipeline body 1 until the surface cleanliness is greater than or equal to Sa2.5 level;
step S2, spraying an anti-corrosion primer coating on the outer surface of the pipeline body 1 treated in the step S1 in a high-pressure airless spraying mode, and drying the sprayed anti-corrosion primer coating to form an anti-corrosion primer layer 2;
and S3, spraying a heat-insulating coating on the outer surface of the anti-corrosion primer layer 2 formed in the step S2 in a real-dry mode by a high-pressure airless spraying mode, and forming the heat-insulating coating 3 in the real-dry mode by the sprayed heat-insulating coating.
The high-pressure airless spraying mode is as follows: fixing the position of a spray gun 4 of the high-pressure airless spraying device, enabling the spraying area of the spray gun 4 to correspond to the pipeline body 1, and enabling the pipeline body 1 to axially move along the self and simultaneously enabling the pipeline body 1 to circumferentially rotate along the self when the spray gun 4 performs spraying.
The chemical resistance and the resistance performance test are carried out on the cut part pipe section of the heat-insulating and corrosion-resistant coating prefabricated heat-insulating industrial pipeline of the embodiment, and the heat-insulating effect is tested, and the following test results are shown in table 1:
TABLE 1 test results for prefabricated thermal insulation industrial pipeline of EXAMPLE 1
Example 2
As shown in fig. 1 to 2, the heat-insulating and corrosion-resistant coating prefabricated heat-insulating industrial pipeline comprises a pipeline body 1, a corrosion-resistant primer layer 2 and a heat-insulating coating 3, wherein the corrosion-resistant primer layer 2 and the heat-insulating coating 3 are sequentially arranged on the outer surface of the pipeline body 1 from inside to outside, the corrosion-resistant primer layer 2 is formed by spraying and drying a corrosion-resistant primer coating, and the heat-insulating coating 3 is formed by spraying and drying a heat-insulating coating;
the anticorrosion primer coating is JT-266D waterborne epoxy zinc-rich primer of Guangzhou Jitai;
the heat insulation coating comprises the following components in parts by mass: 30 parts of aqueous acrylic resin, 50 parts of functional filler, 10 parts of deionized water, 0.5 part of film forming additive and 0.2 part of dispersing agent;
specifically: the functional filler comprises the following components in parts by mass: 20 parts of glass hollow micro beads and 30 parts of polystyrene hollow micro beads; the film forming additive comprises the following components in parts by mass: 0.2 parts of dipropylene glycol butyl ether and 0.2 parts of tripropylene glycol butyl ether; the dispersing agent comprises the following components in parts by mass: 0.1 part of sodium silicate and 0.1 part of sodium hexametaphosphate.
The production method of the heat-insulating and corrosion-preventing coating prefabricated heat-insulating industrial pipeline comprises the following steps:
step S1, oil removal and scale removal are carried out on the outer surface of the pipeline body 1, and rust removal is carried out on the outer surface of the pipeline body 1 until the surface cleanliness is greater than or equal to Sa2.5 level;
step S2, spraying an anti-corrosion primer coating on the outer surface of the pipeline body 1 treated in the step S1 in a high-pressure airless spraying mode, and drying the sprayed anti-corrosion primer coating to form an anti-corrosion primer layer 2;
and S3, spraying a heat-insulating coating on the outer surface of the anti-corrosion primer layer 2 formed in the step S2 in a real-dry mode by a high-pressure airless spraying mode, and forming the heat-insulating coating 3 in the real-dry mode by the sprayed heat-insulating coating.
The high-pressure airless spraying mode is as follows: fixing the position of a spray gun 4 of the high-pressure airless spraying device, enabling the spraying area of the spray gun 4 to correspond to the pipeline body 1, and enabling the pipeline body 1 to axially move along the self and simultaneously enabling the pipeline body 1 to circumferentially rotate along the self when the spray gun 4 performs spraying.
The chemical resistance and the resistance performance test are carried out on the cut part pipe section of the heat-insulating and corrosion-resistant coating prefabricated heat-insulating industrial pipeline of the embodiment, and the heat-insulating effect is tested, and the following test results are obtained as shown in table 2:
TABLE 2 test results for prefabricated thermal insulation industrial pipeline of EXAMPLE 2
As can be seen from the test results of tables 1 and 2, the heat-insulating and corrosion-preventing structural layer on the heat-insulating and corrosion-preventing coating prefabricated heat-insulating industrial pipeline has the characteristics of strong impact resistance, good flexibility, high adhesive force, high temperature resistance (180 ℃), acid resistance and alkali resistance, and good heat-insulating effect. When the temperature of the conveying medium is less than or equal to 140 ℃, the temperature of the outer wall of the pipeline is less than or equal to 50 ℃ according to the related standard, and the requirements of the pipeline on heat preservation and scalding prevention can be met.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the invention pertains from the foregoing disclosure and teachings. Therefore, the present invention is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (10)
1. The utility model provides a prefabricated heat preservation industrial pipeline of thermal insulation anticorrosive coating, includes pipeline body, its characterized in that: the anti-corrosion primer layer is formed by spraying an anti-corrosion primer coating, and the heat-insulating coating is formed by spraying a heat-insulating coating;
the anticorrosive primer coating is a water-based epoxy iron oxide red primer, a water-based epoxy zinc-rich primer or a water-based inorganic zinc-rich primer;
the heat insulation coating comprises the following components in parts by mass: 30-35 parts of aqueous acrylic resin, 40-50 parts of functional filler, 10-30 parts of deionized water, 0.5-1 part of film forming additive and 0.2-0.5 part of dispersing agent.
2. The insulated, corrosion-resistant, coated prefabricated, insulated industrial pipe of claim 1, wherein: the pipe body is not provided with an anti-corrosion primer layer and a heat insulating coating at the welding interface areas of the two axial ends of the pipe body.
3. The insulated, corrosion-resistant, coated prefabricated, insulated industrial pipe of claim 1, wherein: the thickness of the anti-corrosion primer layer is 50-100 mu m.
4. The insulated, corrosion-resistant, coated prefabricated, insulated industrial pipe of claim 1, wherein: the thickness of the heat-insulating coating is 3-5 mm.
5. The insulated, corrosion-resistant, coated prefabricated, insulated industrial pipe of claim 1, wherein: the heat-insulating coating further comprises a finish paint coating, wherein the finish paint coating is arranged on the outer surface of the heat-insulating coating, and the finish paint coating is formed by spraying finish paint coating and drying.
6. A method for producing a prefabricated insulating industrial pipe with an insulating and corrosion-resistant coating according to any one of claims 1 to 5, characterized by comprising the steps of:
step S1, oil removal and scale removal are carried out on the outer surface of the pipeline body, and rust removal is carried out on the outer surface of the pipeline body until the surface cleanliness is greater than or equal to Sa2.5 level;
step S2, spraying an anti-corrosion primer coating on the outer surface of the pipeline body treated in the step S1 in a high-pressure airless spraying mode, and drying the sprayed anti-corrosion primer coating to form an anti-corrosion primer layer;
and S3, spraying a heat-insulating coating on the outer surface of the anticorrosive primer layer formed in the step S2 in a high-pressure airless spraying mode, and forming the heat-insulating coating by the sprayed heat-insulating coating in a solid manner.
7. The method for producing a prefabricated heat-insulating industrial pipe with an insulating and corrosion-resistant coating according to claim 6, further comprising, in step S2: the pipe body is not sprayed with anti-corrosion primer paint at the welding interface areas at the two axial ends of the pipe body.
8. The method for producing the prefabricated heat-insulating industrial pipeline with the heat-insulating and corrosion-resistant coating according to claim 6, wherein the high-pressure airless spraying mode is as follows:
fixing the position of a spray gun of high-pressure airless spraying equipment, enabling a spraying area of the spray gun to correspond to a pipeline body, and enabling the pipeline body to axially move along the self and simultaneously enabling the pipeline body to circumferentially rotate along the self when the spray gun sprays; or alternatively, the process may be performed,
and fixing the position of the pipeline body, enabling the spraying area of a spray gun of the high-pressure airless spraying equipment to correspond to the pipeline body, and enabling the spray gun to move along the axial direction of the pipeline body and simultaneously enabling the spray gun to rotate along the circumferential direction of the pipeline body when the spray gun sprays.
9. The method for producing a prefabricated heat-insulating industrial pipeline with a heat-insulating anticorrosive coating according to claim 6, wherein in step S2, the sprayed anticorrosive primer coating is dried to form an anticorrosive primer layer, comprising: and heating and drying the sprayed anticorrosive primer coating until the sprayed anticorrosive primer coating is dried to form an anticorrosive primer layer, wherein the heating and drying temperature is 50-80 ℃.
10. The method for producing a prefabricated heat-insulating industrial pipeline with a heat-insulating anticorrosive coating according to claim 6, wherein in step S3, the sprayed heat-insulating coating is dried to form a heat-insulating coating, comprising: and heating and drying the sprayed heat-insulating coating until the sprayed heat-insulating coating is dried to form a heat-insulating coating, wherein the heating and drying temperature is 50-80 ℃.
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