CN112893065A - Oil pipe sprayed with nano-alloy anticorrosive paint and spraying process - Google Patents
Oil pipe sprayed with nano-alloy anticorrosive paint and spraying process Download PDFInfo
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- CN112893065A CN112893065A CN202110158591.5A CN202110158591A CN112893065A CN 112893065 A CN112893065 A CN 112893065A CN 202110158591 A CN202110158591 A CN 202110158591A CN 112893065 A CN112893065 A CN 112893065A
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- 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
- B05D7/22—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 to internal surfaces, e.g. of tubes
- B05D7/222—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 to internal surfaces, e.g. of tubes of pipes
- B05D7/225—Coating inside the pipe
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- 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
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- 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
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
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- 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
- B05D7/24—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 for applying particular liquids or other fluent materials
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- 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
- B05D2504/00—Epoxy polymers
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- 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
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
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- 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
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
- B05D2601/22—Silica
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- 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
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
- B05D2601/24—Titanium dioxide, e.g. rutile
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- 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
- B05D2602/00—Organic fillers
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses an oil pipe sprayed with a nano-alloy anticorrosive paint and a spraying process, which relate to the technical field of oil pipe corrosion resistance and comprise the oil pipe and the nano-alloy anticorrosive paint, wherein the spraying process of the nano-alloy anticorrosive paint comprises the following steps: preheating an oil pipe: the heating temperature of the preheating furnace is controlled at 130-280 ℃, and after the heat preservation is carried out for at least 1 hour, the chain frequency in the furnace is adjusted to be 25-55HZ for rolling out the pipe; spraying: spraying by using powder coating spraying equipment, wherein the powder coating temperature in the spraying process is 140-230 ℃, the fluidization pressure is adjusted to be 0.02-0.07MPa, the gun feeding frequency of the powder spraying trolley is 25-60HZ, the gun retreating frequency of the powder spraying trolley is 10-19HZ, the roller rotation speed is 10-30HZ, and the powder discharging amount of a spray gun is controlled to be 0.11-0.55 kg; and (3) curing: after the spraying is finished, curing treatment is carried out by using a curing furnace, the curing temperature is 130-240 ℃, the curing time is 1-1.5 hours, and the thickness of the detected coating is more than or equal to 500 mu m; the oil pipe sprayed with the nano-alloy anticorrosive coating has good mechanical properties, and the coating has excellent adhesive force and chemical corrosion resistance, and particularly has obvious effects of preventing scaling and waxing.
Description
Technical Field
The invention relates to the technical field of oil pipe corrosion prevention, in particular to an oil pipe sprayed with a nano-alloy anticorrosive paint and a spraying process.
Background
The oil exploitation is in the later stage, the exploitation difficulty is increased, water injection substances in a water well are complex and various, the problems of wax deposition and scaling in a water well pipe are increasingly serious, the problems of wax deposition and scaling corrosion of the water well pipe become key factors influencing the exploitation cycle reliability and the service life, the main reasons of failure of the water well pipe are the problems which need to be effectively solved for a long time.
At present, measures adopted by various oil production plants for preventing corrosion and scaling of a water injection pipe mainly comprise: (1) adding a high-efficiency polymer corrosion inhibitor and a scale inhibitor into water injection to slow down or inhibit corrosion and scaling; 2) the corrosion resistance of the water injection pipe matrix is improved by means of nickel-phosphorus plating, nitriding and the like; (3) adopting an organic coating pipe with corrosion resistance and scaling resistance; practice proves that the pipe treated by nickel-phosphorus plating has obvious superiority in corrosion resistance. But because of the process reason, a non-porous coating can not be obtained, the service life of the pipe is influenced, and meanwhile, the waste liquid generated by the process pollutes the environment, so that the application of the pipe is limited. The nitrided pipe is good in corrosion resistance, but has several defects, namely, the nitrided pipe is high in brittleness, cannot be used in a deep well and is only suitable for wells with the well depth of less than 2000 m; secondly, the extension coefficients of the nitriding layer and the pipe are greatly different, and the nitriding layer and the pipe are easy to crack under the action of gravity in a deep well to cause local corrosion; thirdly, the scaling phenomenon of the pipe is serious; fourthly, the hardness of the pipe is higher, and the operation difficulty is increased. Even the production string of the nitriding pipe water injection well adopted by individual oil production plants has been broken and dropped.
The problems of the prior art are that the phenomena of wax precipitation and scaling of the oil pipe can not be solved, so that the oil pipe is seriously corroded, and the production cost is increased; therefore, the development of a novel oil pipe with corrosion resistance and wax deposition resistance is urgently needed.
Disclosure of Invention
The invention aims to provide an oil pipe sprayed with a nano-alloy anticorrosive coating and a spraying process aiming at the defects in the prior art.
The technical scheme of the invention is as follows: an oil pipe sprayed with a nano-alloy anticorrosive paint comprises an oil pipe and the nano-alloy anticorrosive paint, wherein the nano-alloy anticorrosive paint comprises the following components: 45-50% of epoxy resin, 15-20% of composite nylon, 8-12% of superfine precipitated barium sulfate, 2-5% of titanium dioxide, 2-4% of fumed silica, 1-2% of talcum powder, 2-5% of auxiliary agent and 9-12% of filler, wherein the sum of the mass percentages of the components is 100%.
Preferably, the titanium dioxide can be replaced by nano calcium carbonate.
Preferably, the auxiliary agent comprises a polypropylene leveling agent and an ultraviolet absorbent, and the mass ratio of the polypropylene leveling agent to the ultraviolet absorbent is 1: 1.2-1.5.
Preferably, the filler comprises molybdenum disulfide, mica powder and silicon micropowder, and the mass ratio of the molybdenum disulfide to the mica powder to the silicon micropowder is 1:7-8: 13-16.
Preferably, the nano alloy anticorrosive paint is prepared by a mechanochemical method, and the preparation steps are as follows:
weighing: weighing according to the weight ratio;
mixing materials: firstly grinding, then mixing materials, and ensuring that the particle size is not more than 200 meshes;
putting the mixed components into a ball mill for high-speed grinding at the rotating speed of 2000-; filtering and separating to obtain the nano alloy anticorrosive paint.
A spraying process for spraying a nano alloy anticorrosive paint comprises the following steps:
preheating an oil pipe: the oil pipe is preheated by a preheating furnace before spraying, the heating temperature of the preheating furnace is controlled at 130-280 ℃, and after the heat preservation is carried out for at least 1 hour, the chain frequency in the furnace is adjusted to be 25-55HZ for rolling out the pipe;
spraying: spraying by using liquid and powder coating spraying equipment, wherein the powder coating temperature in the spraying process is 140-230 ℃, the fluidization pressure is adjusted to be 0.02-0.07MPa, the gun feeding frequency of the powder spraying trolley is 25-60HZ, the gun retreating frequency of the powder spraying trolley is 10-19HZ, the roller rotating speed is 10-30HZ, and the powder discharging amount of the spray gun is controlled to be 0.11-0.55 kg;
and (3) curing: and (3) after the spraying is finished, curing treatment is carried out by using a curing furnace, the curing temperature is 130-240 ℃, the curing time is 1-1.5 hours, and the thickness of the detected coating is more than or equal to 500 mu m.
Preferably, the air humidity at the time of spraying is < 90%.
Preferably, the preheating temperature of the oil pipe is 190-230 ℃.
Preferably, the powdering temperature during the spraying is 180-220 ℃.
Compared with the prior art, the invention has the following advantages:
the nano alloy oil pipe provided by the invention has good mechanical properties, and the nano alloy anticorrosive coating on the oil pipe has excellent adhesive force and chemical corrosion resistance, and particularly has obvious effects of preventing scale and wax; the anti-scaling and anti-waxing performance of the coating is good, the nano particles are introduced in the composite spraying process to realize the codeposition of metal and the nano particles through the special treatment of the production process, the inner wall surface with the lotus leaf effect is formed, the finish degree of the coating is high, the hardness of the surface can be improved, and the corrosion resistance, the wear resistance, the anti-scaling and anti-waxing performance are improved; according to the invention, the anticorrosion layer with a specific nano alloy morphology is constructed on the surface of the inner wall of the oil pipe, so that the adhesion of liquid substances is reduced, the possibility of corrosion is reduced, the smoothness and the corrosion resistance of the inner wall of the oil pipe are improved, the underground service life is prolonged, and the cost is reduced and the effect is increased.
Detailed Description
The present invention is further illustrated by the following examples.
Example one
An oil pipe sprayed with a nano-alloy anticorrosive paint comprises an oil pipe and the nano-alloy anticorrosive paint, wherein the nano-alloy anticorrosive paint comprises the following components: 49.24 percent of epoxy resin, 18.25 percent of composite nylon, 10.72 percent of superfine precipitated barium sulfate, 4.88 percent of titanium dioxide, 2.84 percent of fumed silica, 1.17 percent of talcum powder, 3.15 percent of auxiliary agent and 9.75 percent of filler.
In more detail, the auxiliary agent comprises a polypropylene leveling agent and an ultraviolet absorbent, and the mass ratio of the polypropylene leveling agent to the ultraviolet absorbent is 1: 1.2.
More specifically, the filler comprises molybdenum disulfide, mica powder and silicon micropowder, and the mass ratio of the molybdenum disulfide to the mica powder to the silicon micropowder is 1:7: 13.
The nano alloy anticorrosive paint is prepared by a mechanochemical method, and the preparation steps are as follows:
weighing: weighing according to the weight ratio;
mixing materials: firstly grinding, then mixing materials, and ensuring that the particle size is less than 200 meshes;
putting the mixed components into a ball mill for high-speed grinding at the rotating speed of 2000-; filtering and separating to obtain the nano alloy anticorrosive paint.
In addition, before spraying, cleaning operation is firstly carried out on the oil pipe; the method is characterized in that a full-fiber trolley furnace is used, the temperature precision is +/-10 ℃, the high-temperature sintering is carried out at 400 ℃, the heat preservation is carried out for 2-3 hours, and the oil stains on the inner wall and the outer wall of the oil pipe are dried and agglomerated into powder, so that the effects of facilitating external derusting and internal removing and ensuring that the inner wall of the oil pipe after internal removing has no oil stains are achieved; after high-temperature sintering, performing steel shot blowing on the inner wall by using a shot blasting machine, wherein the steel shot blowing pressure is 0.4-0.5MPa, the spray gun feeding frequency is 4-6 HZ, the retreating frequency is 20-25 HZ, and the depth of the punched anchor line is 65-85 mu m; and after shot blasting is carried out on the inner wall, quartz sand purging is carried out, the frequency is 5-15 seconds per branch, the purpose of demagnetization can be achieved, and the powdery steel sand left on the inner wall of the oil pipe after steel shots are purged can be purged completely.
The spraying process of the nano alloy anticorrosive paint comprises the following steps:
environment required during spraying: air humidity < 90%, air pressure: 0.8-1 MPa;
preheating an oil pipe: the oil pipe is preheated in a preheating furnace before spraying, the heating temperature of the preheating furnace is controlled at 130 ℃, and after the heat is preserved for at least 1 hour, the frequency of chains in the furnace is adjusted to 25HZ for rolling to discharge the pipes;
spraying: spraying by using liquid and powder coating spraying equipment, wherein the powder feeding temperature in the spraying process is 140 ℃, the fluidizing pressure is adjusted to be 0.02MPa, the gun feeding frequency of a powder spraying trolley is 25HZ, the gun retreating frequency of the powder spraying trolley is 10HZ, the roller rotating speed is 10HZ, and the powder discharging amount of a spray gun is controlled to be 0.11 kg;
and (3) curing: and (3) curing by using a curing furnace after spraying, wherein the curing temperature is 130 ℃, the curing time is 1-1.5 hours, the thickness of the detected coating is 500 mu m, and sampling is carried out to obtain other performance indexes which can meet the standard requirements.
The anti-scaling and anti-waxing performance of the coating is good, the nano particles are introduced in the composite spraying process to realize the codeposition of metal and the nano particles through the special treatment of the production process, the inner wall surface with the lotus leaf effect is formed, the finish degree of the coating is high, the hardness of the surface can be improved, and the corrosion resistance, the wear resistance, the anti-scaling and anti-waxing performance are improved.
According to the invention, the anticorrosion layer with a specific nano alloy morphology is constructed on the surface of the inner wall of the oil pipe, so that the adhesion of liquid substances is reduced, the possibility of corrosion is reduced, the smoothness and the corrosion resistance of the inner wall of the oil pipe are improved, the underground service life is prolonged, and the cost is reduced and the effect is increased.
Example two
As a preferred embodiment of the present invention, the difference between this embodiment and the first embodiment is that titanium dioxide is replaced by nano calcium carbonate; the nano calcium carbonate can obviously improve the adhesive force of the nano alloy anticorrosive paint on the inner wall of the oil pipe, improve the strength and the surface smoothness of a coating and has good anti-settling effect; compared with titanium dioxide, the nano calcium carbonate has lower cost, and can partially replace the titanium dioxide, thereby effectively reducing the production cost of the anti-corrosion oil pipe.
EXAMPLE III
As a preferred embodiment of the present invention, the difference between the present embodiment and the first embodiment is the spraying process parameters of the nano-alloy anticorrosive paint;
the spraying process of the nano alloy anticorrosive paint in the embodiment comprises the following steps:
environment required during spraying: air humidity < 90%, air pressure: 0.8-1 MPa;
preheating an oil pipe: the oil pipe is preheated in a preheating furnace before spraying, the heating temperature of the preheating furnace is controlled at 180 ℃, and after the heat is preserved for at least 1 hour, the frequency of chains in the furnace is adjusted to be 30HZ, and the chains are rolled out of the pipe;
spraying: spraying by using liquid and powder coating spraying equipment, wherein the powder feeding temperature during spraying is 165 ℃, the fluidizing pressure is adjusted to be 0.025MPa, the gun feeding frequency of the powder spraying trolley is 30HZ, the gun retreating frequency of the powder spraying trolley is 12HZ, the roller rotating speed is 15HZ, and the powder outlet quantity of a spray gun is controlled to be 0.2 kg;
and (3) curing: and (3) curing by using a curing furnace after spraying, wherein the curing temperature is 150 ℃, the curing time is 1-1.5 hours, the thickness of the detected coating is 540 mu m, and sampling is carried out to obtain other performance indexes which can meet the standard requirements.
Example four
As a preferred embodiment of the invention, the difference between the third embodiment and the present embodiment lies in the inside and outside removal process parameters of the oil pipe before spraying and the spraying process parameters of the nano alloy anticorrosive paint;
the internal and external removal process of the oil pipe comprises the following specific steps: the method is characterized in that a full-fiber trolley furnace is used, the temperature precision is +/-10 ℃, the high-temperature sintering is carried out at 400 ℃, the heat preservation is carried out for 3-4 hours, and the oil stains on the inner wall and the outer wall of the oil pipe are dried and agglomerated into powder, so that the effects of facilitating external derusting and internal removing and ensuring that the inner wall of the oil pipe after internal removing has no oil stains are achieved; after high-temperature sintering, purging the inner wall with steel shots by using a shot blasting machine, wherein the purging pressure of the steel shots is 0.5-0.7MPa, the feeding frequency of a spray gun is 6-8 HZ, the retreating frequency is 25-35 HZ, and the depth of the punched anchor line is 65-75 mu m; and after shot blasting is carried out on the inner wall, quartz sand purging is carried out, the frequency is 15-20 seconds per branch, the purpose of demagnetization can be achieved, and the powdery steel sand left on the inner wall of the oil pipe after steel shots are purged can be purged completely.
The spraying process of the nano alloy anticorrosive paint in the embodiment comprises the following steps:
environment required during spraying: air humidity < 90%, air pressure: 0.8-1 MPa;
preheating an oil pipe: the oil pipe is preheated in a preheating furnace before spraying, the heating temperature of the preheating furnace is controlled at 220 ℃, and after the heat is preserved for at least 1 hour, the frequency of chains in the furnace is adjusted to 40HZ for rolling to form a pipe;
spraying: spraying by using liquid and powder coating spraying equipment, wherein the powder feeding temperature during spraying is 190 ℃, the fluidizing pressure is adjusted to be 0.04MPa, the gun feeding frequency of the powder spraying trolley is 40HZ, the gun retreating frequency of the powder spraying trolley is 15HZ, the roller rotating speed is 20HZ, and the powder discharging amount of the spray gun is controlled to be 0.4 kg;
and (3) curing: and (3) curing by using a curing furnace after spraying, wherein the curing temperature is 195 ℃, the curing time is 1-1.5 hours, the thickness of the detected coating is 580 mu m, and sampling is carried out to obtain other performance indexes which can meet the standard requirements.
EXAMPLE five
As a preferred embodiment of the present invention, the difference between the present embodiment and the fourth embodiment lies in the inside and outside removal process parameters of the oil pipe before spraying and the spraying process parameters of the nano alloy anticorrosive paint;
the internal and external removal process of the oil pipe comprises the following specific steps: the method is characterized in that a full-fiber trolley furnace is used, the temperature precision is +/-10 ℃, the high-temperature sintering is carried out at 400 ℃, the heat preservation is carried out for 4-6 hours, and the oil stains on the inner wall and the outer wall of the oil pipe are dried and agglomerated into powder, so that the effects of facilitating external derusting and internal removing and ensuring that the inner wall of the oil pipe after internal removing has no oil stains are achieved; after high-temperature sintering, purging the inner wall with steel shots by using a shot blasting machine, wherein the purging pressure of the steel shots is 0.7-0.9MPa, the feeding frequency of a spray gun is 8-10 HZ, the retreating frequency is 35-40 HZ, and the depth of the punched anchor line is 75-85 mu m; and after shot blasting is carried out on the inner wall, quartz sand purging is carried out, the frequency is 20-30 seconds per branch, the purpose of demagnetization can be achieved, and the powdery steel sand left on the inner wall of the oil pipe after steel shots are purged can be purged completely.
The spraying process of the nano alloy anticorrosive paint in the embodiment comprises the following steps:
environment required during spraying: air humidity < 90%, air pressure: 0.8-1 MPa;
preheating an oil pipe: the oil pipe is preheated in a preheating furnace before spraying, the heating temperature of the preheating furnace is controlled at 230 ℃, and after the heat is preserved for at least 1 hour, the frequency of chains in the furnace is adjusted to 50HZ for rolling to form a pipe;
spraying: spraying by using liquid and powder coating spraying equipment, wherein the powder feeding temperature in the spraying process is 220 ℃, the fluidizing pressure is adjusted to be 0.06MPa, the gun feeding frequency of a powder spraying trolley is 60HZ, the gun retreating frequency of the powder spraying trolley is 19HZ, the roller rotating speed is 30HZ, and the powder discharging amount of a spray gun is controlled to be 0.55 kg;
and (3) curing: and (3) curing by using a curing furnace after spraying, wherein the curing temperature is 240 ℃, the curing time is 1-1.5 hours, the thickness of the detected coating is 620 mu m, and sampling is carried out to obtain other performance indexes which can meet the standard requirements.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (9)
1. The oil pipe sprayed with the nano-alloy anticorrosive paint comprises an oil pipe and the nano-alloy anticorrosive paint, and is characterized in that the nano-alloy anticorrosive paint comprises the following components: 45-50% of epoxy resin, 15-20% of composite nylon, 8-12% of superfine precipitated barium sulfate, 2-5% of titanium dioxide, 2-4% of fumed silica, 1-2% of talcum powder, 2-5% of auxiliary agent and 9-12% of filler, wherein the sum of the mass percentages of the components is 100%.
2. The oil pipe sprayed with the nano-alloy anticorrosive paint according to claim 1, wherein: the titanium dioxide can be replaced by nano calcium carbonate.
3. The oil pipe sprayed with the nano-alloy anticorrosive paint according to claim 1, wherein: the auxiliary agent comprises a polypropylene leveling agent and an ultraviolet absorbent, and the mass ratio of the polypropylene leveling agent to the ultraviolet absorbent is 1: 1.2-1.5.
4. The oil pipe sprayed with the nano-alloy anticorrosive paint according to claim 1, wherein: the filler comprises molybdenum disulfide, mica powder and silicon micropowder, wherein the mass ratio of the molybdenum disulfide to the mica powder to the silicon micropowder is 1:7-8: 13-16.
5. The oil pipe sprayed with the nano-alloy anticorrosive paint according to claim 1, wherein: the nano alloy anticorrosive paint is prepared by a mechanochemical method, and comprises the following preparation steps:
weighing: weighing according to the weight ratio;
mixing materials: firstly grinding, then mixing materials, and ensuring that the particle size is not more than 200 meshes;
putting the mixed components into a ball mill for high-speed grinding at the rotating speed of 2000-; filtering and separating to obtain the nano alloy anticorrosive paint.
6. A spraying process for spraying a nano alloy anticorrosive paint is characterized by comprising the following steps: the method comprises the following steps:
preheating an oil pipe: the oil pipe is preheated by a preheating furnace before spraying, the heating temperature of the preheating furnace is controlled at 130-280 ℃, and after the heat preservation is carried out for at least 1 hour, the chain frequency in the furnace is adjusted to be 25-55HZ for rolling out the pipe;
spraying: spraying by using liquid and powder coating spraying equipment, wherein the powder coating temperature in the spraying process is 140-230 ℃, the fluidization pressure is adjusted to be 0.02-0.07MPa, the gun feeding frequency of the powder spraying trolley is 25-60HZ, the gun retreating frequency of the powder spraying trolley is 10-19HZ, the roller rotating speed is 10-30HZ, and the powder discharging amount of the spray gun is controlled to be 0.11-0.55 kg;
and (3) curing: and (3) after the spraying is finished, curing treatment is carried out by using a curing furnace, the curing temperature is 130-240 ℃, the curing time is 1-1.5 hours, and the thickness of the detected coating is more than or equal to 500 mu m.
7. The spraying process for spraying the nano-alloy anticorrosive paint according to claim 6, characterized in that: the air humidity at the time of spraying was < 90%.
8. The spraying process for spraying the nano-alloy anticorrosive paint according to claim 6, characterized in that: the preheating temperature of the oil pipe is 190-230 ℃.
9. The spraying process for spraying the nano-alloy anticorrosive paint according to claim 6, characterized in that: the powdering temperature during spraying is 180-220 ℃.
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| CN202110158591.5A CN112893065B (en) | 2021-02-05 | 2021-02-05 | Oil pipe sprayed with nano-alloy anticorrosive paint and spraying process |
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|---|---|---|---|---|
| CN104212128A (en) * | 2014-08-25 | 2014-12-17 | 濮阳市顺康石油工程技术有限公司 | Novel sucker rod centering guide and preparation method thereof |
| CN109135501A (en) * | 2018-07-09 | 2019-01-04 | 甘肃衍河石油管道涂层有限公司 | A kind of eccentric abrasion prevention anticorrosive powder coating and preparation method thereof |
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