CN109251600A - A kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings and preparation method thereof - Google Patents
A kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings and preparation method thereof Download PDFInfo
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- CN109251600A CN109251600A CN201810982652.8A CN201810982652A CN109251600A CN 109251600 A CN109251600 A CN 109251600A CN 201810982652 A CN201810982652 A CN 201810982652A CN 109251600 A CN109251600 A CN 109251600A
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- 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
- C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- 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
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- 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
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- 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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
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- 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
- C09D5/18—Fireproof paints including high temperature resistant paints
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- 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
- C09D5/24—Electrically-conducting paints
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a kind of metal pipe internal wall with high-temperature resistant anti-corrosive anti-static coatings with and preparation method thereof, belong to oil field pipe anticorrosion technique field, it is intended to provide a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, one layer of fine and close anticorrosion antistatic and coating resistant to high temperature can be formed in metal pipe internal wall, the transmission performance of oil field pipe is effectively provided.Its drip irrigation device is as follows, including polyimide prepolymer, thermostable fluorine resin, thixotropic agent, zeolite molecular sieve, carbon nanotube and solvent.Preparation method is polyimide prepolymer and thermostable fluorine resin to be dissolved in solvent thixotropic agent is added, and obtains mixture；Zeolite molecular sieve powder and carbon nanotube are dissolved in solvent, suspension is obtained；Mixture and suspension are mixed to obtain metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, one layer of fine and close anticorrosion antistatic and coating resistant to high temperature can be formed in metal pipe internal wall, the transmission performance of oil field pipe is effectively provided.
Description
Technical field
The present invention relates to oil field pipe anticorrosion technique field, in particular to a kind of metal pipe internal wall high-temperature resistant anti-corrosive
Anti-static coatings with and preparation method thereof.
Background technique
Metal pipe internal wall coat coating not only has the function of that tube body is protected to be allowed to denude from pumped (conveying) medium, but also has
There is drag reduction, improve transfer efficiency.Therefore, metal pipe internal wall coating emphasis in need of consideration is to want anti-sticking anti-corrosion.Together
When, most of medium transmission processes carry out at relatively high temperatures, therefore also need to consider heat-resisting quantity.Selection is anti-with high temperature resistant
When the coating of viscous corrosion-resisting function, the pumped (conveying) medium of analysis conduit is first had to.
Metallic conduit majority used in China's oil industry is used to convey crude oil, sewage and water filling etc..Since crude oil is mostly
High viscosity, high-content wax amount crude oil, the quasi-oil are influenced by conditions such as temperature, pressure, and wax therein is precipitated from crude oil, are sunk
Product can not be removed voluntarily on the inner wall of oil pipe, oil pipeline and oil storage container, the fuel-displaced ability of oil extraction is caused to reduce,
Energy consumption of pumping increases, the pumping unit lost of life；When crude oil storage and transportation, increases crude oil flow resistance, cause metallic conduit effective cross-section
Product reduces even blocking pipeline, reduces oil transportation ability, increases cost of oil production.
For conveying the metallic conduit of sewage and water filling, contain various additives and acid, alkali, salt etc. in pumped (conveying) medium, very
To drilling mud, seawater.These media easily corrode tube wall, accumulate over a long period and metallic conduit is caused hole occur, cause defeated
Evaporating, emitting, dripping or leaking of liquid or gas during sending, or even cause accident.
For natural gas, it is natural that oneself exploitation of China or the natural gas verified are mostly that sulfur content is high, carbonated amount is high
Gas, these gases out of well it is mined after need to be transported to by metallic conduit natural gas purification factory carry out desulfurization,
Carbon dioxide removal processing, then gives the natural gas for reaching transfer criteria after purification to user by pipeline.In natural gas, do
Dry hydrogen sulfide and carbon dioxide does not corrode metallic conduit, by the natural gas of purified treatment, although oneself reaches conveying mark
Standard, but because there are a large amount of water vapours in natural gas, gold is condensed in the reduction of gas temperature in pipe conveying procedure
Metal conduit inner wall surface dissolves in after hydrogen sulfide and carbon dioxide in acidity, causes the corrosion of metallic conduit, so, for this kind of
Metallic conduit needs to carry out preservative treatment before use, and otherwise, metal conveyance conduit is rotten quickly during use
Erosion, or even there is rust hole, in turn result in the leakage and accident of natural gas.
Currently, the anti-corrosion pipe material inner wall that petroleum, natural-gas transfer pipeline use is corrosion resistant alloy or epoxy coating.Anti-corrosion conjunction
Metal can play certain antisepsis, but its valence in the anti-corrosion method of early stage pipeline in the lower oil gas field of soda acid content
Lattice are high, and difficulty of construction is big, and does not have antistick characteristic.Epoxy coating belongs to thermohardening lacquer system, applies for two-component solvent type
Material or powdery paints, wherein powdery paints is applied more, and solidification temperature is strong, electric with pipe surface cohesive force at 240 DEG C or more
Good insulation preformance, impact resistance, but water-resistant coating is poor, and anti-sticking anti-fouling effect is poor, the easy fouling of coating inner wall, non-refractory, 120
DEG C or more coating performance be greatly lowered.The quality of anti-corrosive properties relies primarily on film thickness, coating thickness generally at 150 microns or more,
Some is even up to 500 microns, and nonetheless, coating just needed coating again using 2 months or so in oil pipe.
It is anti-that the Chinese patent that notification number is CN103194146B discloses a kind of metal pipe internal wall thermoplasticity high temperature resistant
Viscous anticorrosive paint and preparation method thereof, it includes thermoplastic polyether sulphone resin, thermostable fluorine resin, thixotropic agent, anti-corrosion pigment, function
It can filler, double solvents and auxiliary agent.Although adhesive force of this thermoplasticity high temperature resistant antisticking corrosion-proof paint in metal surface is good, fit
With temperature up to 260 DEG C, but the compactness of coating is not good enough, is easy to produce hole or crackle.
Summary of the invention
The object of the present invention is to provide a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, have good cause
Close property and wearability, while there is antistatic performance.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, calculate as mass fraction, are made of the following components:
10-20 parts of polyimide prepolymer, 15-30 parts of thermostable fluorine resin, 1-3 parts of thixotropic agent, 10-30 parts of zeolite molecular sieve,
10-20 parts and solvent 50-80 parts of carbon nanotube.
Further, the preparation method of polyimide prepolymer includes the following steps:
3,3 ' 4 are prepared under room temperature, and the dimethyl sulfoxide saturated solution of 4 '-benzophenone tetracarboxylic dianhydrides prepares o-phenylenediamine
The saturated solution of isocyanates；It stirs and is reacted under oil bath heating, reaction temperature is 80 DEG C, is risen after sustained response 30min
Temperature cools down to 140 DEG C, then after reacting 30min, is cooled to and is stored at room temperature 3h and obtains polyimide prepolymer.
Further, zeolite molecular sieve is the zeolite molecular sieve of MFI type.
Further, thixotropic agent is any one in polyvinyl alcohol, fumed silica or rilanit special.
Further, carbon nanotube is multi-walled carbon nanotube.
Further, solvent is N-Methyl pyrrolidone, n,N-Dimethylformamide, n,N-dimethylacetamide or diformazan
Any one or a few mixture in base sulfoxide.
A kind of metal pipe internal wall preparation method of high-temperature resistant anti-corrosive anti-static coatings, includes the following steps:
Polyimide prepolymer and thermostable fluorine resin are dissolved in solvent by step 1., and 20-30min is stirred under room temperature, and touching is added
Become agent, persistently stirs 1h and obtain mixture；
Zeolite molecular sieve powder and carbon nanotube are dissolved in solvent by step 2., and ball milling 2h under room temperature obtains suspension；
The mixture that step 1 obtains and the suspension that step 2 obtains are mixed under step 3. room temperature, ball milling 3h is obtained
Metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings.
By using above-mentioned technical proposal, a kind of metal pipe internal wall high-temperature resistant anti-corrosive antistatic painting provided by the invention
Material can form one layer of fine and close anticorrosion antistatic and coating resistant to high temperature in metal pipe internal wall, effectively offer oil field tubulars
The transmission performance in road.
In conclusion the invention has the following advantages:
1. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings provided by the invention use polyimides pre-polymerization
The combination of body and thermostable fluorine resin, thus resistant to high temperature while effectively reducing the frictional force in pipeline, when wax is from original
When being precipitated in oil, polyimides can prevent it to be deposited on the inner wall of oil pipe, oil pipeline and oil storage container；And polyimides
It can be combined with thixotropic agent, further increase the mobility of coating, reduce the agglomeration of coating, and be not easy coating when standing
Layering.
2. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings provided by the invention use zeolite molecules
The combination of sieve and carbon nanotube, when forming coating in metallic conduit, zeolite molecular sieve and carbon nanotube are in microcosmic upper formation one
The structure of kind long-range order, is not likely to produce hole and crackle；One layer of very fine and close protective film is macroscopically being formed, resistance to strong acid is strong
Alkali is had excellent performance, and effectively improves the wear-resisting property and high temperature resistance of coating；
3. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings provided by the invention, the porous knot of zeolite molecular sieve
Structure has high specific surface area, and the zeolite molecular sieve of MFI type has micropore and mesoporous mixing duct, can effectively inhale
Hydrogen sulfide in closed tube road further functions as the effect for preventing metallic conduit to be corroded；
4. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings provided by the invention, the addition of carbon nanotube, especially
It is selection multi-walled carbon nanotube, further improves the compactness that coating is coated to the coating formed after metallic conduit, drop simultaneously
Electrostatic effect in low metallic conduit, effectively prevent accumulation of pollutants in pipeline caused by Electrostatic Absorption；
5. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings provided by the invention, due to polyimide prepolymer
Addition, make the coating coated in metallic conduit surface that there is hydrophilic group and lipophilic group simultaneously, with preferable lipophobic hydrophobic
It can be with stronger soil resistant ability；
6. a kind of metal pipe internal wall method of high-temperature resistant anti-corrosive anti-static coatings provided by the invention, preparation process is simple,
Low energy consumption；And by carbon nanotube and zeolite molecular sieve ball milling 2h at normal temperature, make between zeolite molecular sieve and carbon nanotube sufficiently
Contact, is collectively formed one layer of fine and close protective film.
Specific embodiment
A kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, calculate as mass fraction, are made of the following components:
10-20 parts of polyimide prepolymer, 15-30 parts of thermostable fluorine resin, 1-3 parts of thixotropic agent, 10-30 parts of zeolite molecular sieve,
10-20 parts and solvent 50-80 parts of carbon nanotube.
As a preferred embodiment, the preparation method of polyimide prepolymer includes the following steps:
3,3 ' 4 are prepared under room temperature, and the dimethyl sulfoxide saturated solution of 4 '-benzophenone tetracarboxylic dianhydrides prepares o-phenylenediamine
The saturated solution of isocyanates；It stirs and is reacted under oil bath heating, reaction temperature is 80 DEG C, is risen after sustained response 30min
Temperature cools down to 140 DEG C, then after reacting 30min, is cooled to and is stored at room temperature 3h and obtains polyimide prepolymer.
As a preferred embodiment, zeolite molecular sieve is the zeolite molecular sieve of MFI type.
As a preferred embodiment, thixotropic agent is any one in polyvinyl alcohol, fumed silica or rilanit special
Kind.
As a preferred embodiment, carbon nanotube is multi-walled carbon nanotube.
As a preferred embodiment, solvent is N-Methyl pyrrolidone, n,N-Dimethylformamide, N, N- dimethylacetamide
Any one or a few mixture in amine or dimethyl sulfoxide.
As a preferred embodiment, the preparation method of a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, packet
Include following steps:
Polyimide prepolymer and thermostable fluorine resin are dissolved in solvent by step 1., and 20-30min is stirred under room temperature, and touching is added
Become agent, persistently stirs 1h and obtain mixture；
Zeolite molecular sieve powder and carbon nanotube are dissolved in solvent by step 2., and ball milling 2h under room temperature obtains suspension；
The mixture that step 1 obtains and the suspension that step 2 obtains are mixed under step 3. room temperature, ball milling 3h is obtained
Metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings.The number mentioned in following embodiment is calculated with mass fraction.
Embodiment 1: a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, preparation step are as follows:
Step 1. weighs 1 part 3 under room temperature, and 3 ' 4,4 '-benzophenone tetracarboxylic dianhydrides are prepared in dimethyl sulfoxide solvent
As saturated solution.10 parts of polyisocyanates are weighed, is configured to saturated solution with o-phenylenediamine and is added to oil bath magnetic force simultaneously to stir
It mixes in device and is reacted, reaction temperature is 70 DEG C, reaction time 30min, revolving speed 1500r/min and then increases temperature
To 140 DEG C, reaction time 30min, carried out under conditions of nitrogen protection, revolving speed 1000r/min is cooled to and is stored at room temperature
3h obtains polyimide prepolymer.
10 parts of polyimide prepolymers and 30 parts of thermostable fluorine resins are dissolved in 50 parts of N-Methyl pyrrolidones by step 2.
In, 20min is stirred under room temperature, 2 parts of polyvinyl alcohol are added, 1h is persistently stirred and obtains mixture；
10 parts of zeolite molecular sieve powder and 20 parts of carbon nanotube powders are dissolved in 30 parts of N-Methyl pyrrolidones, room temperature by step 3.
Lower ball milling 2h, obtains suspension；
The mixture that step 2 obtains and the suspension that step 3 obtains are mixed ball milling 3h under simultaneously room temperature by step 4., obtain metal tube
Road inner wall high-temperature resistant anti-corrosive anti-static coatings.
By plasma spraying, gained coating is sprayed into metal pipe internal wall.
Embodiment 2: a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, preparation step are as follows:
Step 1. weighs 1 part 3 under room temperature, and 3 ' 4,4 '-benzophenone tetracarboxylic dianhydrides are prepared in dimethyl sulfoxide solvent
As saturated solution.10 parts of polyisocyanates are weighed, is configured to saturated solution with o-phenylenediamine and is added to oil bath magnetic force simultaneously to stir
It mixes in device and is reacted, reaction temperature is 70 DEG C, reaction time 30min, revolving speed 1500r/min and then increases temperature
To 140 DEG C, reaction time 30min, carried out under conditions of nitrogen protection, revolving speed 1000r/min is cooled to and is stored at room temperature
3h obtains polyimide prepolymer.
20 parts of polyimide prepolymers and 15 parts of thermostable fluorine resins are dissolved in 40 parts of N, N- dimethyl formyl by step 2.
Amine stirs 30min under room temperature, 1 part of rilanit special is added, and persistently stirs 1h and obtains mixture；
30 parts of zeolite molecular sieve powder and 20 parts of carbon nanotube powders are dissolved in 20 parts of n,N-Dimethylformamide by step 3.,
Ball milling 2h under room temperature, obtains suspension；
The mixture that step 2 obtains and the suspension that step 3 obtains are mixed ball milling 3h under simultaneously room temperature by step 4., obtain metal tube
Road inner wall high-temperature resistant anti-corrosive anti-static coatings.
By plasma spraying, gained coating is sprayed into metal pipe internal wall.
Embodiment 3: a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, preparation step are as follows:
Step 1. weighs 1 part 3 under room temperature, and 3 ' 4,4 '-benzophenone tetracarboxylic dianhydrides are prepared in dimethyl sulfoxide solvent
As saturated solution.10 parts of polyisocyanates are weighed, is configured to saturated solution with o-phenylenediamine and is added to oil bath magnetic force simultaneously to stir
It mixes in device and is reacted, reaction temperature is 70 DEG C, reaction time 30min, revolving speed 1500r/min and then increases temperature
To 140 DEG C, reaction time 30min, carried out under conditions of nitrogen protection, revolving speed 1000r/min is cooled to and is stored at room temperature
3h obtains polyimide prepolymer.
15 parts of polyimide prepolymers and 20 parts of thermostable fluorine resins are dissolved in 30 parts of N, N- dimethylacetamide by step 2.
Amine stirs 25min under room temperature, 3 parts of fumed silicas is added, and persistently stirs 1h and obtains mixture；
20 parts of zeolite molecular sieve powder and 10 parts of carbon nanotube powders are dissolved in 20 parts of n,N-dimethylacetamide by step 3.,
Ball milling 2h under room temperature, obtains suspension；
The mixture that step 2 obtains and the suspension that step 3 obtains are mixed ball milling 3h under simultaneously room temperature by step 4., obtain metal tube
Road inner wall high-temperature resistant anti-corrosive anti-static coatings.
By plasma spraying, gained coating is sprayed into metal pipe internal wall.
Embodiment 4: a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, preparation step are as follows:
Step 1. weighs 1 part 3 under room temperature, and 3 ' 4,4 '-benzophenone tetracarboxylic dianhydrides are prepared in dimethyl sulfoxide solvent
As saturated solution.10 parts of polyisocyanates are weighed, is configured to saturated solution with o-phenylenediamine and is added to oil bath magnetic force simultaneously to stir
It mixes in device and is reacted, reaction temperature is 70 DEG C, reaction time 30min, revolving speed 1500r/min and then increases temperature
To 140 DEG C, reaction time 30min, carried out under conditions of nitrogen protection, revolving speed 1000r/min is cooled to and is stored at room temperature
3h obtains polyimide prepolymer.
27 parts of polyimide prepolymers and 18 parts of thermostable fluorine resins are dissolved in 40 parts of dimethyl sulfoxides, room temperature by step 2.
3 parts of rilanit specials are added in lower stirring 30min, persistently stir 1h and obtain mixture；
20 parts of zeolite molecular sieve powder and 15 parts of carbon nanotube powders are dissolved in 40 parts of dimethyl sulfoxides, ball under room temperature by step 3.
2h is ground, suspension is obtained；
The mixture that step 2 obtains and the suspension that step 3 obtains are mixed ball milling 3h under simultaneously room temperature by step 4., obtain metal tube
Road inner wall high-temperature resistant anti-corrosive anti-static coatings.
By plasma spraying, gained coating is sprayed into metal pipe internal wall.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (7)
1. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings, which is characterized in that calculate as mass fraction, by following
Component is made:
10-20 parts of polyimide prepolymer, 15-30 parts of thermostable fluorine resin, 1-3 parts of thixotropic agent, 10-30 parts of zeolite molecular sieve,
10-20 parts and solvent 50-80 parts of carbon nanotube.
2. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings according to claim 1, which is characterized in that institute
The preparation method for stating polyimide prepolymer includes the following steps:
3,3 ' 4 are prepared under room temperature, and the dimethyl sulfoxide saturated solution of 4 '-benzophenone tetracarboxylic dianhydrides prepares o-phenylenediamine
The saturated solution of isocyanates；It stirs and is reacted under oil bath heating, reaction temperature is 80 DEG C, is risen after sustained response 30min
Temperature cools down to 140 DEG C, then after reacting 30min, is cooled to and is stored at room temperature 3h and obtains polyimide prepolymer.
3. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings according to claim 1, which is characterized in that institute
State the zeolite molecular sieve that zeolite molecular sieve is MFI type.
4. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings according to claim 1, which is characterized in that institute
Stating thixotropic agent is any one in polyvinyl alcohol, fumed silica or rilanit special.
5. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings according to claim 1, which is characterized in that institute
Stating carbon nanotube is multi-walled carbon nanotube.
6. a kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings according to claim 1, which is characterized in that institute
It is any in N-Methyl pyrrolidone, N,N-dimethylformamide, DMAC N,N' dimethyl acetamide or dimethyl sulfoxide for stating solvent
One or more of mixtures.
7. a kind of metal pipe internal wall preparation method of high-temperature resistant anti-corrosive anti-static coatings, which is characterized in that including walking as follows
It is rapid:
Polyimide prepolymer and thermostable fluorine resin are dissolved in solvent by step 1., and 20-30min is stirred under room temperature, and touching is added
Become agent, persistently stirs 1h and obtain mixture；
Zeolite molecular sieve powder and carbon nanotube are dissolved in solvent by step 2., and ball milling 2h under room temperature obtains suspension；
The mixture that step 1 obtains and the suspension that step 2 obtains are mixed under step 3. room temperature, ball milling 3h is obtained
Metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982652.8A CN109251600A (en) | 2018-08-27 | 2018-08-27 | A kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982652.8A CN109251600A (en) | 2018-08-27 | 2018-08-27 | A kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings and preparation method thereof |
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| CN109251600A true CN109251600A (en) | 2019-01-22 |
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| CN201810982652.8A Pending CN109251600A (en) | 2018-08-27 | 2018-08-27 | A kind of metal pipe internal wall high-temperature resistant anti-corrosive anti-static coatings and preparation method thereof |
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