CN109030336A - Study the device of acid gas well Special threading connector torque shoulder face corrosion damage - Google Patents
Study the device of acid gas well Special threading connector torque shoulder face corrosion damage Download PDFInfo
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- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention relates to a kind of devices for studying acid gas well Special threading connector torque shoulder face corrosion damage.Described device includes stress loading unit, is flushed with hydrogen unit, slot element, electro-chemical test unit and the fixation device for fixing sample.Device provided by the invention can real simulation acid gas well Special threading connector torque shoulder face corrosion damage environment, and to load compression be flushed with hydrogen in sample gap and gap outer portion carries out electrochemical measurement, while in situ, real-time monitoring can be carried out to microenvironment in gap；Apparatus structure provided by the invention is simple, easy to operate, and detection accuracy is high.
Description
Technical field
The invention belongs to metal material military service performance testing fields, more particularly, to research acid gas well special thread
The device of connector torque shoulder face corrosion damage.
Background technique
Nipple is that natural gas well lower tubular column is most weak, the highest position of failure risk, and nipple failure accidents account for
The 85% ~ 95% of all gas well tubing string failure accidents sums.Gas well oil pipe generallys use Special threading connector connection, and special thread connects
Head generally comprises torque shoulder face, sealing surface and screw thread three parts, wherein torque shoulder face is first of special thread sealing
Barrier is the key position for hindering corrosive medium to enter sealing surface.Torque shoulder face is once corroded, and oil pipe, which will face, to be let out
Leakage or even entirely ineffective risk.From the point of view of the Service Environment of acid gas well oil pipe threaded connector, the corrosion in torque shoulder face is
Material failure behavior under gap, stress and hydrogen infiltration collective effect.Gap is that corrosive medium enters the unique of torque shoulder face
Channel, biggish tensile load, tubing vibration etc. all may cause formation gap at torque shoulder face, corrosive medium caused to seep
Enter；After gap is formed, original contact stress on torque shoulder face completely or partially disappears, but still by tube fluid
The effect of compression and surface compress residual stresses.Under acid gas well operating condition, hydrogen atom is easy to penetrate into material from inner wall of the pipe
Material is internal, and then reaches torque shoulder face.It not only can trigger hydrogen induced cracking (HIC), can also cause the passivation on torque shoulder face
Film destroys.
Currently, hydrogen penetration testing is based on Deveanathan-Stachurski double-electrolyzer principle more, but in seamless, nothing
Carried out under conditions of applied stress, and existing crevice corrosion research device does not have and meanwhile be flushed with hydrogen with stress loading function,
Therefore, existing research device can not simulate the environment of Special threading connector torque shoulder face corrosion damage, i.e., realize seam simultaneously
Gap manufacture, stress loading and electrochemistry are flushed with hydrogen, and lead to the corrosion damage Behavior law and machine in Special threading connector torque shoulder face
It manages unclear so far.
Therefore, a kind of device that can simulate acid gas well Special threading connector torque shoulder face corrosion damage environment is researched and developed
It is the urgent need in corrosion research.
Summary of the invention
It is an object of the invention to overcome existing corrosion research device can not real simulation acid gas well Special threading connector
The defect and deficiency of torque shoulder face corrosion damage environment provide a kind of research acid gas well Special threading connector torque shoulder face
The device of corrosion damage.Device provided by the invention can simulate the material under gap, stress and hydrogen infiltration three's coupling simultaneously
Expect corrosion damage, can be used for the research of Special threading connector torque shoulder face corrosion damage.
For realize foregoing invention purpose, the present invention adopts the following technical scheme:
A kind of device for studying acid gas well Special threading connector torque shoulder face corrosion damage, including stress loading unit, fill
Hydrogen unit, slot element, electro-chemical test unit and the fixation device for fixing sample；The stress loading unit includes setting
It is placed at the top of the sample for applying the load top plate and Pressure mensuration mechanism of stress；The unit that is flushed with hydrogen includes being set to
It is flushed with hydrogen electrolytic cell and Polarization Mechanism on fixed device, is provided on the fixed device and is flushed with hydrogen be flushed with hydrogen that electrolytic cell is connected
Notch；The slot element includes the gap cover board and crevice corrosion mechanism for testing being suspended on the sample, the sample and
Setting has the gap gasket and forms gap pond between the two between the cover board of gap, is provided with and the gap on the gap gasket
The gap notch that pond is connected；The sample and crevice corrosion mechanism for testing are electrically connected with the electro-chemical test unit.
The device of research acid gas well Special threading connector torque shoulder face corrosion damage provided by the invention passes through stress
Loading unit, be flushed with hydrogen unit, slot element and electro-chemical test unit setting can real simulation acid gas well special thread connect
Head torque shoulder face corrosion damage environment, wherein stress loading unit is flushed with hydrogen unit simulation hydrogen atom infiltration for loading compression
Enter metal, and crevice corrosion, and being flushed with hydrogen in sample gap to load compression using each mechanism for testing are simulated by gap pond
Electrochemical measurement is carried out with gap outer portion, while in situ, real-time monitoring can be carried out to microenvironment in gap；The present invention provides
Apparatus structure it is simple, easy to operate, detection accuracy is high.
Preferably, the fixed device is the fixation device that side side opening and internal hollow out form cavity, the examination
Sample is fixedly installed in cavity；Load top plate pads are provided between the load top plate and the sample；The load top plate
It is fixedly connected with fixed device by bolt-helicitic texture.
Different compression requirements can be met by screw thread load.
Preferably, it is vertically arranged with load threaded hole on the load top plate and fixed device, the load top plate and consolidates
Determine device and is fixedly connected by wearing the load screw rod of the load threaded hole.
Preferably, the section of the load top plate is consistent with the section of the sample, and the load threaded hole is set to institute
State the center of the top surface of load top plate.
It should be understood that signified section is the face parallel with the two phase-contact surface herein.
Preferably, the fixed device, load top plate and load screw rod are made of corrosion resistant material.
Preferably, the corrosion resistant material is C276.
Preferably, the Pressure mensuration mechanism includes the displacement measurement sensor being set on the load top plate, institute
The output end of displacement measurement sensor is electrically connected with displacement display.
The compression that displacement and sample due to load top plate are subject to abides by stringent Hooke's law (Hooke's law
, in which:For pressure, unit kN；For elasticity modulus, unit kN/mm；It is therefore sharp for the displacement for loading top plate, unit mm)
With load top plate displacement can calculate one-way compressive stress suffered by determining sample (relationship of pressure and compression:,
Wherein:For compression, units MPa；For pressure, unit kN；For the cross-sectional area of sample, unit mm2).
Certainly, other mechanisms for measuring compression size can also be used in the present invention, as Pressure mensuration mechanism
Building block.
Preferably, the Polarization Mechanism includes being set to the auxiliary electrode that is flushed with hydrogen being flushed with hydrogen in electrolytic cell, described to be flushed with hydrogen auxiliary
Electrode and sample are electrically connected with galvanostat.
It is flushed with hydrogen in electrolytic cell to place and is flushed with hydrogen electrolyte, it, can by being flushed with hydrogen notch such as 0.2mol/L anhydrous slufuric acid sodium solution
So that sample comes into full contact with electrolyte is flushed with hydrogen, under normal circumstances, the liquid level that electrolyte is flushed with hydrogen in electrolytic cell is flushed with hydrogen with energy
Sample is not crossed, notch is flushed with hydrogen and is flushed with hydrogen subject to auxiliary electrode；Galvanostat can apply galvanostatic polarization, such as -1mA/ to sample
cm2Galvanostatic polarization.
Preferably, it the fixed device and is flushed with hydrogen between electrolytic cell and is provided with gasket seal.
It is further preferable that the gasket seal is silica gel sealing gasket.
Preferably, the notch that is flushed with hydrogen is square notch.
Preferably, the crevice corrosion mechanism for testing includes micro- pH electrode, micro- auxiliary electrode and micro reference electrode, the seam
It is arranged on gap cover board and fixes micro- pH electrode, micro- auxiliary electrode and micro- pH electrode sockets of micro reference electrode, micro- auxiliary respectively
Electrode sockets and micro reference electrode socket, the electrode lower end surface setting of micro- pH electrode, micro- auxiliary electrode and micro reference electrode
In the gap pond, micro- auxiliary electrode and micro reference electrode are electrically connected with the electro-chemical test unit.
Sample, micro- auxiliary electrode, micro reference electrode and electro-chemical test unit, which connect, can carry out gap inner part sample
The test such as open circuit potential, linear polarization, electrochemical alternate impedance spectrum and dynamic potential scanning.Local ring in micro- pH electrode test gap
The pH in situ in border.
By the design of the specific structure, in situ, real-time monitoring can be carried out to microenvironment in gap.
Preferably, the gap gasket is polytetrafluoroethylene (PTFE) gap gasket.
Preferably, the electro-chemical test unit includes electrochemical workstation, auxiliary electrode and reference electrode, the examination
Sample, auxiliary electrode and reference electrode are electrically connected to form three electrode test system outside gap with electrochemical workstation；The sample
Three electrode test system in gap is electrically connected to form with electrochemical workstation with crevice corrosion mechanism for testing.
Sample, auxiliary electrode, reference electrode and electrochemical workstation connect the open circuit electricity that gap outer portion sample can be achieved
The test such as position, linear polarization, electrochemical alternate impedance spectrum and dynamic potential scanning.
Application of the above-mentioned apparatus in the test of acid gas well special thread torque shoulder face corrosion damage is also of the invention
In protection scope.
Compared with prior art, the invention has the following beneficial effects:
The device of research acid gas well Special threading connector torque shoulder face corrosion damage provided by the invention can real simulation acid
Property gas well Special threading connector torque shoulder face corrosion damage environment, and to load compression be flushed with hydrogen in sample gap and gap
Outer portion carries out electrochemical measurement, while can carry out in situ, real-time monitoring to microenvironment in gap；Device provided by the invention
Structure is simple, easy to operate, and detection accuracy is high.
Detailed description of the invention
Fig. 1 is the device for the research acid gas well Special threading connector torque shoulder face corrosion damage that embodiment 1 provides
Structural schematic diagram；
Fig. 2 is flushed with hydrogen unit-stress loading unit-slot element structural schematic diagram for what embodiment 1 provided；
Fig. 3 is the structural schematic diagram for the fixation device that embodiment 1 provides；
Fig. 4 is the structural schematic diagram for the gap cover board that embodiment 1 provides；
Fig. 5 is the structural schematic diagram for the gap gasket that embodiment 1 provides；
Fig. 6 is the corrosion behavior of N80 steel under gap, hydrogen infiltration, stress coupling effect :(a) electrochemical impedance spectroscopy, (b) anode pole
Change curve, the optical photograph of crevice corrosion when not being flushed with hydrogen (c), the optical photograph of crevice corrosion when (d) being flushed with hydrogen；
Wherein, 1 is stress loading unit, and 11 is load top plate, and 12 be Pressure mensuration mechanism, and 121 be displacement measurement sensor,
122 be displacement display, and 13 be load top plate pads, and 14 be load threaded hole, and 15 be load screw rod；
2 is are flushed with hydrogen unit, and 21 is are flushed with hydrogen electrolytic cell, and 22 be Polarization Mechanism, and 221 is are flushed with hydrogen auxiliary electrode, and 222 be galvanostat,
23 is are flushed with hydrogen notch, and 24 be gasket seal；
3 be slot element, and 31 be gap cover board, and 311 be micro- pH electrode sockets, and 312 be micro- auxiliary electrode socket, and 313 be micro- ginseng
Than electrode sockets, 32 be crevice corrosion mechanism for testing, and 321 be micro- pH electrode, and 322 be micro- auxiliary electrode, and 323 be micro- reference electricity
Pole, 33 be gap gasket, and 34 be gap notch；
4 be electro-chemical test unit, and 41 be electrochemical workstation, and 42 be auxiliary electrode, and 43 be reference electrode；
5 be sample；
6 be fixed device.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with Figure of description and tool
Body embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain
The present invention is not intended to limit the present invention.In addition, technology involved in the various embodiments of the present invention described below
Feature can be combined with each other as long as they do not conflict with each other.
It should be noted that it both can be directly another when original part is referred to as " being set to ", " install in " another element
On element, there may also be elements placed in the middle.When an element is considered " to connect " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Embodiment 1
The present embodiment provides a kind of devices for studying acid gas well Special threading connector torque shoulder face corrosion damage, such as Fig. 1 ~ 5,
Including stress loading unit 1, it is flushed with hydrogen unit 2, slot element 3, electro-chemical test unit 4 and fixed dress for fixing sample 5
Set 6.
Electro-chemical test unit 4 includes electrochemical workstation 41, auxiliary electrode 42 and reference electrode 43,42 He of auxiliary electrode
Reference electrode 43 is electrically connected with electrochemical workstation 41, and sample 5 is electrically connected as working electrode with electrochemical workstation 41, is formed
Three electrode test system outside gap.
Fixed device 6 is the fixed dress that side side (front that the side is known as device) opening and internal hollow out form cavity
It sets, sample 5 is fixedly installed in cavity.
Such as Fig. 1 ~ 3, stress loading unit 1 includes the load top plate 11 and Pressure mensuration mechanism for being set to 5 top of sample
12.Load top plate 11 is used to measure the size of the compression applied for applying compression, Pressure mensuration mechanism 12.
Specifically, it loads and is provided with load top plate pads 13 between top plate 11 and sample 5, load top plate 11, load top plate
The section of gasket 13 is consistent with the cross sectional shape of sample 5, i.e. the width of phase-contact surface is consistent with length；It loads top plate 11 and consolidates
Determine device 6 to achieve a fixed connection by following bolt-helicitic texture: being vertically arranged with load in the end face center of load top plate 11
Threaded hole 14 is fixed on device 6 and is provided with corresponding load threaded hole 14, and load top plate 11 and fixed device 6 are by wearing
The load screw rod 15 of load threaded hole 14 is fixedly connected.Fixed device 6, load top plate 11 and load screw rod 15 are by corrosion resistant material
(such as C276) is made, and the material of load top plate pads 13 is nylon.By adjusting the tightness of load screw rod 15, can be obtained not
Same compression.
Pressure mensuration mechanism 12 includes the displacement measurement sensor 121 being set on load top plate 11, and displacement measurement passes
The output end of sensor 121 is electrically connected with displacement display 122.The size that the compression of load can be measured by Hooke's law, into
And it indicates how to adjust load screw rod.
Such as Fig. 1 ~ 3, being flushed with hydrogen unit 2 includes being set on fixed device 6 side (i.e. the back side) opposite with opening direction
It is flushed with hydrogen electrolytic cell 21 and Polarization Mechanism 22, fixes device 6 and be flushed with hydrogen 21 joint of electrolytic cell being provided with silica gel sealing gasket 24, and
It offers and is flushed with hydrogen notch 23.
In the present embodiment, Polarization Mechanism 22 includes being set to be flushed with hydrogen in electrolytic cell 21 to be flushed with hydrogen auxiliary electrode 221, is flushed with hydrogen
Auxiliary electrode 221 and sample 5 are electrically connected with galvanostat 222.It is flushed with hydrogen to place in electrolytic cell 21 and is flushed with hydrogen electrolyte, such as
0.2mol/L anhydrous slufuric acid sodium solution may make sample 5 to come into full contact with electrolyte is flushed with hydrogen, ordinary circumstance by being flushed with hydrogen notch 23
Under, it is flushed with hydrogen in electrolytic cell 21 and is flushed with hydrogen the liquid level of electrolyte capable of not having sample 5, being flushed with hydrogen notch 23 and being flushed with hydrogen auxiliary electrode
Subject to 221；Galvanostat 222 can apply galvanostatic polarization, such as -1mA/cm to sample 52Galvanostatic polarization.
As shown in Fig. 1 ~ 4, slot element 3 includes the gap cover board 31 and crevice corrosion mechanism for testing being suspended on sample 5
32, setting has the gap gasket 33 and forms gap pond between the two between sample 5 and gap cover board 31, is arranged on gap gasket 33
There is the gap notch 34 being connected with gap pond.Gap pond thickness determines by the thickness of gap gasket 33, analog different situations
Under crevice corrosion, gap gasket 33 is prepared using polytetrafluoroethylene material.
Specifically, crevice corrosion mechanism for testing 32 includes micro- pH electrode 321, micro- auxiliary electrode 322 and micro reference electrode
323, the micro- pH electricity for fixing micro- pH electrode 321, micro- auxiliary electrode 322 and micro reference electrode 323 respectively is set on gap cover board 31
Pole socket 311, micro- auxiliary electrode socket 312 and micro reference electrode socket 313, micro- auxiliary electrode 322 and micro reference electrode 323
Electrode lower end surface is set in the pond of gap and is electrically connected to form three electrode test system in gap with electrochemical workstation 41.
Use of the device provided by the invention when studying acid gas well Special threading connector torque shoulder face corrosion damage
Method is as follows:
0.2mol/L anhydrous slufuric acid sodium solution is added to being flushed with hydrogen in electrolytic cell 21, liquid level is not can have sample 5, fixed device
The square at 6 backs is flushed with hydrogen notch 23, is flushed with hydrogen subject to auxiliary electrode 221, and gives 5 application -1mA/ of sample by galvanostat 222
cm2Galvanostatic polarization.
After being flushed with hydrogen the time and reaching the requirement of experiment time, which is put into solution pool, experiment is added into solution pool
Solution, liquid level, which is subject to, can not have sample 5, gap cover board 31, auxiliary electrode 42 and reference electrode 43.
Sample 5, auxiliary electrode 42 and reference electrode 43 and the connection of electrochemical workstation 41 carry out gap outer portion sample 5
The test such as open circuit potential, linear polarization, electrochemical alternate impedance spectrum and dynamic potential scanning.Sample 5, micro- auxiliary electrode 322 and micro-
Reference electrode 323 and the connection of electrochemical workstation 41 carry out the open circuit potential of gap inner part sample 5, linear polarization, electrochemistry
The test such as ac impedance spectroscopy and dynamic potential scanning.Micro- pH electrode 321 tests the pH in situ of local environment in gap.
To sum up, the present invention can on-spot study acid gas well Special threading connector torque shoulder face corrosion damage device, i.e.,
Material failure behavior under gap, stress and hydrogen infiltration collective effect can carry out real-time monitoring to local environment variation in gap,
See Fig. 6.Open circuit potential under constant load or varying load effect, activation polarization, electrochemical ac resistance can also be carried out to sample is flushed with hydrogen
The measurement of the electrochemical in-situs such as anti-spectrum, electrochemistry noise.The gap inner part and gap outer portion for being flushed with hydrogen sample can also be opened
The measurement of the electrochemical in-situs such as road current potential, activation polarization, electrochemical alternate impedance spectrum, electrochemistry noise.Can also to constant load or
The gap inner part and gap outer portion of sample under varying load effect carry out open circuit potential, activation polarization, electrochemical ac
The measurement of the electrochemical in-situs such as impedance spectrum, electrochemistry noise.
Sample usually selects the super 13Cr of Oil Tube Steel in the present invention, other materials can also be used, such as Oil Tube Steel N80, P110
Deng being tested.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With.It can be applied to various suitable the field of the invention completely.It for those skilled in the art, can be easily
Realize other modification.Therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of device for studying acid gas well Special threading connector torque shoulder face corrosion damage, which is characterized in that including answering
Power loading unit (1) is flushed with hydrogen unit (2), slot element (3), electro-chemical test unit (4) and for fixing consolidating for sample (5)
Determine device (6)；The stress loading unit (1) includes being set at the top of the sample (5) for applying the load top of compression
Plate (11) and Pressure mensuration mechanism (12)；Described be flushed with hydrogen unit (2) include being set on fixed device (6) to be flushed with hydrogen electrolytic cell
(21) and Polarization Mechanism (22) it, is provided on the fixed device (6) and is flushed with hydrogen notch be flushed with hydrogen that electrolytic cell (21) is connected
(23)；The slot element (3) includes gap cover board (31) and the crevice corrosion mechanism for testing being suspended on the sample (5)
(32), setting has the gap gasket (33) and forms gap pond between the two between the sample (5) and gap cover board (31), described
The gap notch (34) being connected with the gap pond is provided on gap gasket (33)；The sample (5) and crevice corrosion are surveyed
Test-run a machine structure (32) is electrically connected with the electro-chemical test unit (4).
2. device according to claim 1, which is characterized in that the fixed device (6) is that side side is open and inside is engraved
Sky forms the fixation device of cavity, and the sample (5) is fixedly installed in cavity；The load top plate (11) and the sample
(5) load top plate pads (13) is provided between；The load top plate (11) and fixed device (6) pass through bolt-helicitic texture
It is fixedly connected.
3. device according to claim 2, which is characterized in that set vertically on the load top plate (11) and fixed device (6)
It is equipped with load threaded hole (14), load top plate (11) and fixed device (6) are by wearing load threaded hole (14)
Load screw rod (15) is fixedly connected.
4. device according to claim 3, which is characterized in that the section of load top plate (11) and the sample (5)
Section is consistent, and load threaded hole (14) is set to the center of the top surface of load top plate (11).
5. device according to claim 1, which is characterized in that the Pressure mensuration mechanism (12) includes being set to described add
Carry the displacement measurement sensor (121) on top plate (11), the output end and displacement display of institute's displacement measurement sensor (121)
(122) it is electrically connected.
6. device according to claim 1, which is characterized in that the Polarization Mechanism (22) includes being set to be flushed with hydrogen electrolytic cell
(21) being flushed with hydrogen auxiliary electrode (221) in, it is described to be flushed with hydrogen auxiliary electrode (221) and sample (5) is electrically connected with galvanostat (222)
It connects.
7. device according to claim 1, which is characterized in that the fixed device (6) and being flushed with hydrogen between electrolytic cell (21) sets
It is equipped with gasket seal (24).
8. device according to claim 1, which is characterized in that the crevice corrosion mechanism for testing (32) includes micro- pH electrode
(321), micro- auxiliary electrode (322) and micro reference electrode (323) are arranged on the gap cover board (31) and fix micro- pH respectively
Electrode (321), micro- auxiliary electrode (322) and micro- pH electrode sockets (311) of micro reference electrode (323), micro- auxiliary electrode socket
(312) and micro reference electrode socket (313), micro- pH electrode (321), micro- auxiliary electrode (322) and micro reference electrode (323)
Electrode lower end surface be set in the gap pond, micro- auxiliary electrode (322) and micro reference electrode (323) and the electrochemistry are surveyed
Try unit (4) electrical connection.
9. device according to claim 1, which is characterized in that the electro-chemical test unit (4) includes electrochemical workstation
(41), auxiliary electrode (42) and reference electrode (43), the sample (5), auxiliary electrode (42) and reference electrode (43) with electricity
Chem workstation (41) is electrically connected to form three electrode test system outside gap；The sample (5) and crevice corrosion mechanism for testing
(32) three electrode test system in gap is electrically connected to form with electrochemical workstation (41).
10. any described device of claim 1 ~ 9 answering in the test of acid gas well special thread torque shoulder face corrosion damage
With.
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| CN201810664549.9A CN109030336B (en) | 2018-06-25 | 2018-06-25 | Device for researching corrosion damage of torque shoulder surface of special threaded joint of acid gas well |
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| CN201810664549.9A CN109030336B (en) | 2018-06-25 | 2018-06-25 | Device for researching corrosion damage of torque shoulder surface of special threaded joint of acid gas well |
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| CN110274869A (en) * | 2019-06-25 | 2019-09-24 | 中国船舶重工集团公司第七二五研究所 | A kind of in-situ monitoring experimental rig and method for metal material crevice corrosion |
| CN111307707A (en) * | 2020-04-02 | 2020-06-19 | 中国科学院海洋研究所 | Crevice corrosion experimental device and crevice corrosion experimental method capable of regulating and controlling size of crevice in situ in real time |
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| CN110274869A (en) * | 2019-06-25 | 2019-09-24 | 中国船舶重工集团公司第七二五研究所 | A kind of in-situ monitoring experimental rig and method for metal material crevice corrosion |
| CN111307707A (en) * | 2020-04-02 | 2020-06-19 | 中国科学院海洋研究所 | Crevice corrosion experimental device and crevice corrosion experimental method capable of regulating and controlling size of crevice in situ in real time |
| CN112697686A (en) * | 2020-12-04 | 2021-04-23 | 中国科学院金属研究所 | Test device and method for rapidly evaluating titanium alloy gap corrosion |
| CN113029923A (en) * | 2021-03-03 | 2021-06-25 | 华能澜沧江水电股份有限公司 | Test system and test method for accelerating metal corrosion by introducing oxygen under dry and wet conditions |
| CN113029923B (en) * | 2021-03-03 | 2023-04-14 | 华能澜沧江水电股份有限公司 | Test system and test method for accelerating metal corrosion by introducing oxygen under dry and wet conditions |
| CN113866083A (en) * | 2021-08-16 | 2021-12-31 | 中山大学 | Corrosion device for simulating combined action of dynamic microorganisms and stress |
| CN115753585A (en) * | 2022-11-22 | 2023-03-07 | 中国海洋大学 | In-situ detection system and detection method based on stress and gap coupling effect |
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