CN207675610U - One kind is for evaluating dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure - Google Patents
One kind is for evaluating dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure Download PDFInfo
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Abstract
The utility model one kind, being capable of permeability and corrosion-inhibiting coating of the dissolved oxygen in the corrosion-inhibiting coating permeability of dissolved oxygen in corrosion-inhibiting coating in the case where deforming under rapid and accurate determination high temperature and high pressure environment for evaluating dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure.Including high temperature and high pressure kettle, pure coating sample mounting device, air supply system, real-time monitoring system and exhaust treatment system；Heating device is provided in high temperature and high pressure kettle；The sensing chamber of single-open is provided in pure coating sample mounting device, sensing chamber includes independent first chamber and second chamber, the open end of first chamber seals successively is fixed with porous ceramics disk and pure coating sample, and the open end of second chamber seals successively is fixed with porous flexible disk and pure coating sample；Air supply system is for supplying required gas；Real-time monitoring system is used to monitor high temperature and high pressure kettle respectively by detector and detects indoor dissolved oxygen content；It is connected to inside exhaust treatment system and high temperature and high pressure kettle.
Description
Technical field
The utility model is related to water flooding oil conduit anti-corrosive coating fields, specially a kind of for evaluating high temperature and pressure
Lower dissolved oxygen infiltrative device in corrosion-inhibiting coating.
Background technology
As oil field development enters the middle and later periods, injection well pipe column damages problem getting worse, after becoming puzzlement petroleum industry
The a great problem of phase exploitation.Wherein, environmental corrosion is the main reason for causing injection well pipe column to damage.Organic coating anti-corrosion skill
Art due to construction technology is simple, of low cost, favorable anti-corrosion effect and as current water-filling oil pipe main anti-corrosion measure.
Though organic coating can completely cut off ion to some extent, the corrosion resistance of water injection well antisepsis oil pipe is improved.But organic coating
Can not completely exclusion of water and oxygen infiltration.Water and oxygen penetrate into coating/metal circle by coating macroscopic view or microdefect
Behind face, Korrosionsmedium is constituted, forming anode region and cathodic region in coating/metal interface occurs electrochemical corrosion.The moon of corrosion
Pole reaction is related with current potential, and when current potential is higher than -0.8V (vs.SCE), leading reaction is oxygen depolarization reduction reaction, i.e. oxygen uptake
Corrosion.And in oil-field flooding environment, current potential is generally all higher than -0.8V.So dissolved oxygen is that control is rotten through the permeability of coating
Lose the key step occurred.Therefore, permeability of the dissolved oxygen in corrosion-inhibiting coating in water filling environment is evaluated to prevent assessing and predicting
The service life and remaining life of rotten coating tubing have very important directive significance.
The testing equipment that coating penetration performance can be evaluated at present is few, mainly has：(1) Chinese patent
CN201610387014.2 discloses " low-intensity, low-permeability coating material gas diffusivity measurement device and method ", should
Device includes two vacuum chambers in parallel, measuring chamber and plenum chamber.Very thin coating material can be used to measure for the device, right
In the coating material of low-permeability, stabilizing gas pressure and gas flux data also can be quickly obtained, measurement result is accurate.(2)
A kind of " evaluation solubilised state CO is disclosed in Chinese patent CN201310232373.72Diffusion and permeance property in corrosion-inhibiting coating
Method ", then the pH of percolating solution under the pH and coating of this method testing soil solution first calculates soil liquid CO2It is dense
Spend percolating solution CO under c1 and coating2Concentration c 2, and c2~t curve graphs and ln (c1-c2)~t curve graphs are drawn, finally calculate
Solubilised state CO2Diffusion coefficient and infiltration coefficient in corrosion-inhibiting coating.The device and method, which realize, exists to solubilised state carbon dioxide
Diffusion and the quantitative assessment of permeance property in corrosion-inhibiting coating.
The first experimental rig can test low-intensity, low-permeability coating material gas diffusivity, rest on gaseous state type
The conceptual phase of Medium Diffusion and permeance property, cannot be to diffusion of the solubilised state type gas medium in corrosion-inhibiting coating and permeability
It can be studied.Although second experimental rig can be spread in corrosion-inhibiting coating to the carbon dioxide of solubilised state and permeance property
Quantitative assessment；But solubilised state carbon dioxide can only be evaluated under normal temperature and pressure in diffusion and permeance property in corrosion-inhibiting coating.More than
Apparatus function is relatively simple, cannot evaluate infiltration of the dissolved oxygen in corrosion-inhibiting coating under actual condition high temperature hyperbaric environment
Property.
Utility model content
For problems of the prior art, the utility model provides one kind and exists for evaluating dissolved oxygen under high temperature and pressure
Infiltrative device, simple in structure in corrosion-inhibiting coating, reasonable design, can simulate actual condition, fast and accurately measure high temperature
Under hyperbaric environment permeability and corrosion-inhibiting coating of the dissolved oxygen in corrosion-inhibiting coating in the case where deforming dissolved oxygen in anti-corrosion
Permeability in coating.
The utility model is to be achieved through the following technical solutions：
One kind is used to evaluate dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure, including high temperature and high pressure kettle,
Pure coating sample mounting device, air supply system, real-time monitoring system and exhaust treatment system；
It is provided with heating device in the high temperature and high pressure kettle；
The sensing chamber of single-open is provided in the pure coating sample mounting device, sensing chamber includes independent first chamber
Room and second chamber, the open end of first chamber seals successively is fixed with porous ceramics disk and pure coating sample, second chamber
Open end seals be fixed with porous flexible disk and pure coating sample successively；
The air supply system is used for gas needed for high temperature and high pressure kettle and the indoor supply of detection；
The real-time monitoring system, which is used to monitor high temperature and high pressure kettle respectively by detector and detect indoor dissolved oxygen, to be contained
Amount；
It is connected to inside the exhaust treatment system and high temperature and high pressure kettle, for handling the exhaust gas being discharged in high temperature and high pressure kettle.
Preferably, the pure coating sample mounting device include the mounting device upper cover being fixedly connected from top to bottom successively,
Sample positioning device and mounting device lower cover；Two hollow cavities are correspondingly arranged among sample positioning device and mounting device lower cover
Body, two hollow cavities and mounting device upper cover of sample positioning device form the first chamber and second chamber of sensing chamber；It is more
Hole ceramic disk and pure coating sample correspond to first chamber, and porous flexible disk and pure coating sample correspond to second chamber, compress solid
It is scheduled between sample positioning device and mounting device lower cover.
Further, between mounting device upper cover and sample positioning device, between sample positioning device and porous ceramics disk,
It is respectively arranged with gasket between sample positioning device and porous flexible disk and between mounting device lower cover and pure coating sample
Circle.
Further, setting is fluted in the middle part of the both ends of sample positioning device, in the middle part of mounting device upper cover lower end and installs
Device lower cover upper center is respectively arranged with the boss of recess-mounted cooperation；Mounting device upper cover, sample positioning device and installation
Device lower cover is fixedly connected from the nut of the fastening bolt that sequentially passes through with.
Preferably, the air supply system includes multiple gas cylinders, and connect and be arranged in high temperature and pressure with gas cylinder respectively
Kettle and the indoor one-way air inlet mouth of detection.
Further, it is arranged in high temperature and pressure at least provided with three pipelines, the connection of at least one pipeline on each gas cylinder
One-way air inlet mouth in kettle, the one-way air inlet mouth that the connection of at least one pipeline is arranged in sensing chamber's first chamber, at least one
Pipeline connects the one-way air inlet mouth being arranged in sensing chamber's second chamber.
Preferably, real-time monitoring system includes a computer for being used for data processing, and three are separately positioned on sensing chamber
Dissolving oxygen probe in first chamber, second chamber and high temperature and high pressure kettle, the pressure detector being arranged in high temperature and high pressure kettle,
Hygrosensor and pH detectors；Dissolving oxygen probe, pressure detector, hygrosensor connect meter with pH detector output ends
The input terminal of calculation machine, dissolved oxygen content, pressure, temperature and the pH value being respectively used in monitoring corresponding position.
Preferably, the input terminal of exhaust treatment system is connected to the one-way exhaust mouth being arranged inside high temperature and high pressure kettle, is used
In the exhaust gas being discharged in processing high temperature and high pressure kettle.
Preferably, the heating device includes the secondary heating that primary heater and side in high temperature and high pressure kettle bottom is arranged
Device.
Preferably, it is provided with buncher at the top of the high temperature and high pressure kettle, is used for high temperature and high pressure kettle and air supply system, in real time
The sealed connection of monitoring system and exhaust treatment system.
Compared with prior art, the utility model has technique effect beneficial below：
The utility model adjusts temperature by heating device, on the one hand can adjust pressure by air supply system, on the one hand
Corrosive gas (H can be passed through according to test requirements document2S、CO2Deng), the Oil Tube Coating of a variety of water filling operating mode difference well sections can be simulated
Permeability of the dissolved oxygen in corrosion-inhibiting coating under operating mode is simulated in Service Environment, in real time monitoring, and can be in high temperature and high pressure kettle
Different test solutions is injected, a kind of device multiple use is realized.By the porous ceramics disk of setting, there is highdensity sky
Gap, it is ensured that dissolved oxygen penetrates into sensing chamber after penetrating coating, and can support pure coating sample, ensures pure coating sample in autoclave
It is not destroyed when interior application pressure.The antilysis oxygen permeability of corrosion-inhibiting coating can be evaluated using the device；Meanwhile by making
With the porous flexible disk with high density gap, it is ensured that dissolved oxygen penetrates into sensing chamber after penetrating coating, and can support pure painting
Layer sample ensures that pure coating sample occurs a certain amount of deformation but do not broken when pure coating sample applies pressure in autoclave
It is bad, carry out the antilysis oxygen permeability of evaluation corrosion-inhibiting coating；This has the selection and life prediction of Oil Field Oil Tube Coating
It is significant.
Further, the pure coating sample mounting device being arranged by the three stage structure of setting is ensureing that sensing chamber is close
While closing space, cooperation can be inlayed；And stablized and sealed aid to pure coating sample.
Further, the setting of multiple gas cylinders disclosure satisfy that the demand under different actual conditions, wide adaptation range, while in height
In warm autoclave and it is carried out at the same time ventilation treatment in sensing chamber so that internal and external pressure balance, and can ensure to detect the one of liquid
Cause property.
Further, by the main thermostat of setting and secondary thermostat, the temperature of test solution quickly and is uniformly improved,
Certifiable experiment reaches expected test temperature.
Further, it ensure that the environmental protection of whole device with securely and reliably, utilizes boundling by exhaust treatment system setting
Device ensure that the seal of high temperature and high pressure kettle and is reliably connected to external equipment.
Description of the drawings
Fig. 1 is the entirety that the utility model is used to evaluate dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure
Structural schematic diagram.
Fig. 2 is overall structure diagram when corrosion-inhibiting coating deforms in the example of the utility model described device.
Fig. 3 is the vertical view of the pure coating sample mounting device described in the example of the utility model.
In figure：1, high temperature and high pressure kettle, 2, pure coating sample mounting device, 3, air supply system, 4, real-time monitoring system, 5, useless
Gas processing system, 6, primary heater, 7, secondary heater, 8, buncher, 9, gas cylinder, 10, one-way exhaust mouth, 11, one-way air inlet mouth,
12, computer, 13, dissolving oxygen probe, 14, pressure detector, 15, hygrosensor, 16, pH detectors, 17, Sample location
Device, 18, mounting device upper cover, 19, mounting device lower cover, 20, fastening bolt, 21, nut, 22, porous ceramics disk, 23, inspection
Survey room, 24, seal washer, 25, pure coating sample, 26, detection solution, 27, porous flexible disk.
Specific implementation mode
The utility model is described in further detail with reference to specific embodiment, described is to the utility model
Explanation rather than limit.
The utility model one kind is used to evaluate dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure, including：
High temperature and high pressure kettle 1, pure coating sample mounting device 2, air supply system 3, real-time monitoring system 4 and exhaust treatment system 5；It is wherein pure
Coating sample mounting device 2 include sample positioning device 17, mounting device upper cover 18, mounting device lower cover 19, fastening bolt 20,
Nut 21, porous ceramics disk 22 and porous flexible disk 27.Dissolved oxygen under high temperature and high pressure environment can be evaluated using the device preventing
Permeability and corrosion-inhibiting coating permeability of the dissolved oxygen in corrosion-inhibiting coating in the case where deforming in rotten coating；Pass through adjusting
Temperature and pressure, and different experimental solutions are injected, it is passed through corrosive gas (H according to test requirements document2S、CO2Deng), it can simulate more
The Oil Tube Coating Service Environment of kind water filling operating mode difference well section.This has the selection and life prediction of Oil Field Oil Tube Coating
Significance.
Wherein, as shown in Figure 1, high temperature and high pressure kettle 1 includes a secondary primary heater 6 and a secondary heater 7, it is located at height
The bottom and side wall of warm autoclave 1, to ensure the uniformity of high pressure temperature in the kettle；Further include one to be used to be sealed tube bank
Connect access buncher 8, the tube bank include the intake pipeline of air supply system 3, real-time monitoring system 4 signal wire and give up
The export pipeline of gas processing system 5.
As shown in figures 1 and 3, in pure coating sample mounting device 2 sample positioning device 17 and mounting device upper cover 18 and
Mounting device lower cover 19 is sealed using seal washer 24, to prevent dissolved oxygen from penetrating into sensing chamber from gap.Porous ceramics disk 22
With highdensity gap, it is ensured that dissolved oxygen penetrates into sensing chamber 23 after penetrating coating, and can support pure coating sample 25, ensures
Pure coating sample 25 is not destroyed when applying pressure in high temperature and high pressure kettle 1；As shown in Fig. 2, porous with high density gap
Flexible disk 27, it is ensured that dissolved oxygen penetrates into sensing chamber after penetrating coating, and can support pure coating sample, ensures pure coating sample
Pure coating sample occurs a certain amount of deformation but is not destroyed when applying pressure in autoclave.In this preferred embodiment, sample is fixed
Setting is fluted in the middle part of the both ends of position device 17,18 lower end of mounting device upper cover middle part and 19 upper center of mounting device lower cover point
It is not provided with the boss of recess-mounted cooperation；Mounting device upper cover 18, sample positioning device 17 and mounting device lower cover 19 by according to
Secondary perforative fastening bolt 20 is fixedly connected by the nut 21 of cooperation.Seal washer 24, porous ceramics disk 22 and pure coating sample
Product 25 and seal washer 24, porous flexible disk 27 and pure coating sample 25 are correspondingly arranged at groove and the axial direction of boss connects
In contacting surface.
As depicted in figs. 1 and 2, air supply system 3 includes multiple feeders, it is ensured that autoclave and the indoor pressure of detection
And dissolved oxygen content.Air supply system 3 includes multiple gas cylinders 9, a plurality of pipeline and multiple one-way air inlet mouths 11.It is capable of supply that including oxygen
Gas and H2S and CO2Equal corrosive gas, also required inert gas.
As depicted in figs. 1 and 2, real-time monitoring system 4 includes the computer that multiple detectors and one are used for data processing
12, specifically include three dissolved oxygens being separately positioned in 23 first chamber of sensing chamber and second chamber and high temperature and high pressure kettle 1
Detector 13, the pressure detector 14 being arranged in high temperature and high pressure kettle 1, hygrosensor 15 and pH detectors 16, for monitoring
Dissolved oxygen content in corresponding position, the parameters such as pressure, temperature and pH value.
The gas for coordinating air supply system 3 to be passed through to it by detecting solution 26 in the utility model, is realized to oil-field flooding
The simulation of environment.Detection solution 26 can use detection solution in the prior art.
Experimental rig described in the utility model using when be as follows：
By in pure coating sample mounting device 2 sample positioning device 17 and mounting device upper cover 18 install, device is anti-
Up, the injection detection solution 26 into the first chamber and second chamber of sensing chamber 23, is then installed in first chamber successively
Seal washer 24, porous ceramics disk 22, pure coating sample 25 and seal washer 24 install seal washer successively in second chamber
24, porous flexible disk 27, pure coating sample 25 and seal washer 24, last mounting device lower cover 19, fastening bolt 20 and nut
21 etc..Pure coating sample mounting device 2 is put into high temperature and high pressure kettle 1, after connecting air supply system 3 and real-time monitoring system 4, to
Injection detection solution 26 in high temperature and high pressure kettle 1.After installing high-temperature high-pressure reaction kettle 1, the first chamber to sensing chamber 23 and
Two chambers carry out deoxygenation processing, and record dissolved oxygen content in real time.It is passed through corrosive gas (H according to test requirements document2S、CO2Deng),
Make-up gas makes to reach predetermined pressure；The dissolved oxygen of requirement of experiment is filled with into high temperature and high pressure kettle 23；Start heater, is warming up to
Predetermined temperature；Dissolved oxygen content in high temperature and high pressure kettle 23 is monitored in real time during this.During experiment, pressure can be passed through
15 real-time monitoring test pressure of force detector 14, pH detectors 16 and hygrosensor, pH value and test temperature.
Claims (10)
1. one kind is for evaluating dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure, which is characterized in that including height
Warm autoclave (1), pure coating sample mounting device (2), air supply system (3), real-time monitoring system (4) and exhaust treatment system
(5)；
It is provided with heating device in the high temperature and high pressure kettle (1)；
The sensing chamber (23) of single-open is provided in the pure coating sample mounting device (2), sensing chamber (23) includes independent
First chamber and second chamber, the open end of first chamber seals successively is fixed with porous ceramics disk (22) and pure coating sample
(25), the open end of second chamber seals successively is fixed with porous flexible disk (27) and pure coating sample (25)；
The air supply system (3) is used for into high temperature and high pressure kettle (1) and sensing chamber (23) gas needed for supply；
The real-time monitoring system (4) is molten in high temperature and high pressure kettle (1) and sensing chamber (23) for being monitored respectively by detector
Solve oxygen content；
It is connected to inside the exhaust treatment system (5) and high temperature and high pressure kettle (1), for handling discharge in high temperature and high pressure kettle (1)
Exhaust gas.
2. according to claim 1 a kind of for evaluating dissolved oxygen infiltrative dress in corrosion-inhibiting coating under high temperature and pressure
It sets, which is characterized in that the pure coating sample mounting device (2) includes the mounting device upper cover being fixedly connected from top to bottom successively
(18), sample positioning device (17) and mounting device lower cover (19)；In sample positioning device (17) and mounting device lower cover (19)
Between be correspondingly arranged two hollow cavities, two hollow cavities and mounting device upper cover (18) of sample positioning device (17) form inspection
Survey the first chamber and second chamber of room (23)；Porous ceramics disk (22) and pure coating sample (25) correspond to first chamber, porous
Flexible disk (27) and pure coating sample (25) correspond to second chamber, are pressed abd fixed on sample positioning device (17) and mounting device
Between lower cover (19).
3. according to claim 2 a kind of for evaluating dissolved oxygen infiltrative dress in corrosion-inhibiting coating under high temperature and pressure
It sets, which is characterized in that between mounting device upper cover (18) and sample positioning device (17), sample positioning device (17) and porous pottery
Between porcelain dish (22), between sample positioning device (17) and porous flexible disk (27) and mounting device lower cover (19) and pure painting
It is respectively arranged with seal washer (24) between layer sample (25).
4. according to claim 2 a kind of for evaluating dissolved oxygen infiltrative dress in corrosion-inhibiting coating under high temperature and pressure
Set, which is characterized in that setting is fluted in the middle part of the both ends of sample positioning device (17), in the middle part of mounting device upper cover (18) lower end and
Mounting device lower cover (19) upper center is respectively arranged with the boss of recess-mounted cooperation；Mounting device upper cover (18), sample are fixed
Position device (17) and mounting device lower cover (19) are from the fixed company of the nut (21) of the fastening bolt (20) that sequentially passes through with
It connects.
5. according to claim 1 a kind of for evaluating dissolved oxygen infiltrative dress in corrosion-inhibiting coating under high temperature and pressure
It sets, which is characterized in that the air supply system (3) includes multiple gas cylinders (9), and connect and be arranged with gas cylinder (9) respectively
One-way air inlet mouth (11) in high temperature and high pressure kettle (1) and sensing chamber (23).
6. according to claim 5 a kind of for evaluating dissolved oxygen infiltrative dress in corrosion-inhibiting coating under high temperature and pressure
It sets, which is characterized in that be arranged in high temperature and pressure at least provided with three pipelines, the connection of at least one pipeline on each gas cylinder (9)
One-way air inlet mouth (11) in kettle (1), the one-way air inlet that the connection of at least one pipeline is arranged in sensing chamber (23) first chamber
Mouth (11), the one-way air inlet mouth (11) that the connection of at least one pipeline is arranged in sensing chamber (23) second chamber.
7. according to claim 1 a kind of for evaluating dissolved oxygen infiltrative dress in corrosion-inhibiting coating under high temperature and pressure
It sets, which is characterized in that real-time monitoring system (4) includes a computer (12) for being used for data processing, and three are separately positioned on
Dissolving oxygen probe (13) in sensing chamber (23) first chamber, second chamber and high temperature and high pressure kettle (1) is arranged in high temperature and pressure
Pressure detector (14) in kettle (1), hygrosensor (15) and pH detectors (16)；Dissolve oxygen probe (13), pressure is visited
Survey device (14), hygrosensor (15) connect the input terminal of computer (12) with pH detectors (16) output end, are respectively used to supervise
Survey dissolved oxygen content, pressure, temperature and the pH value in corresponding position.
8. according to claim 1 a kind of for evaluating dissolved oxygen infiltrative dress in corrosion-inhibiting coating under high temperature and pressure
It sets, which is characterized in that the input terminal of exhaust treatment system (5) the one-way exhaust mouth internal in high temperature and high pressure kettle (1) with setting
(10) it is connected to, for handling the exhaust gas being discharged in high temperature and high pressure kettle (1).
9. according to claim 1 a kind of for evaluating dissolved oxygen infiltrative dress in corrosion-inhibiting coating under high temperature and pressure
It sets, which is characterized in that the heating device includes primary heater (6) and side of the setting in high temperature and high pressure kettle (1) bottom
Secondary heater (7).
10. according to claim 1 a kind of for evaluating dissolved oxygen infiltrative dress in corrosion-inhibiting coating under high temperature and pressure
It sets, which is characterized in that buncher (8) is provided at the top of the high temperature and high pressure kettle (1), for high temperature and high pressure kettle (1) and gas supply
System (3), the sealed connection of real-time monitoring system (4) and exhaust treatment system (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721782801.3U CN207675610U (en) | 2017-12-19 | 2017-12-19 | One kind is for evaluating dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721782801.3U CN207675610U (en) | 2017-12-19 | 2017-12-19 | One kind is for evaluating dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure |
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| Publication Number | Publication Date |
|---|---|
| CN207675610U true CN207675610U (en) | 2018-07-31 |
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ID=62969537
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|---|---|---|---|
| CN201721782801.3U Active CN207675610U (en) | 2017-12-19 | 2017-12-19 | One kind is for evaluating dissolved oxygen infiltrative device in corrosion-inhibiting coating under high temperature and pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007843A (en) * | 2017-12-19 | 2018-05-08 | 中国石油天然气集团公司 | One kind is used to evaluate dissolved oxygen infiltrative device and method in corrosion-inhibiting coating under high temperature and pressure |
-
2017
- 2017-12-19 CN CN201721782801.3U patent/CN207675610U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007843A (en) * | 2017-12-19 | 2018-05-08 | 中国石油天然气集团公司 | One kind is used to evaluate dissolved oxygen infiltrative device and method in corrosion-inhibiting coating under high temperature and pressure |
| CN108007843B (en) * | 2017-12-19 | 2024-01-30 | 中国石油天然气集团公司 | Device and method for evaluating permeability of dissolved oxygen in anti-corrosion coating at high temperature and high pressure |
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