CN220399219U - Lead bismuth material corrosion testing device - Google Patents
Lead bismuth material corrosion testing device Download PDFInfo
- Publication number
- CN220399219U CN220399219U CN202322269752.5U CN202322269752U CN220399219U CN 220399219 U CN220399219 U CN 220399219U CN 202322269752 U CN202322269752 U CN 202322269752U CN 220399219 U CN220399219 U CN 220399219U
- Authority
- CN
- China
- Prior art keywords
- lead bismuth
- closed container
- bismuth material
- ceramic rod
- corrosion testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910052797 bismuth Inorganic materials 0.000 title claims abstract description 64
- 239000000463 material Substances 0.000 title claims abstract description 64
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 230000007797 corrosion Effects 0.000 title claims abstract description 46
- 238000005260 corrosion Methods 0.000 title claims abstract description 46
- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 239000000919 ceramic Substances 0.000 claims abstract description 60
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000001301 oxygen Substances 0.000 claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000004154 testing of material Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- UDRRLPGVCZOTQW-UHFFFAOYSA-N bismuth lead Chemical compound [Pb].[Bi] UDRRLPGVCZOTQW-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The utility model discloses a lead bismuth material corrosion testing device, which comprises a closed container for containing lead bismuth material, a telescopic mechanism and a ceramic rod for placing a sample to be tested, wherein the closed container is provided with a plurality of sealing grooves; the telescopic mechanism is arranged on the top surface of the closed container in a telescopic way, the ceramic rod is arranged in the telescopic mechanism and moves up and down in the closed container along with the telescopic action of the telescopic mechanism, so that a sample to be tested is positioned above the lead bismuth material in the closed container or is inserted into the lead bismuth material. According to the lead bismuth material corrosion testing device, the telescopic mechanism drives the ceramic rod to move up and down in the closed container, when the oxygen concentration of the lead bismuth material does not reach the target concentration, the sample to be tested on the ceramic rod is hung above the lead bismuth material and is not inserted into the liquid lead bismuth material, so that the problem of inaccurate material testing caused by lead bismuth corrosion of the sample to be tested in the early debugging process is avoided, and further the corrosion testing accuracy of the sample to be tested is improved.
Description
Technical Field
The utility model relates to a material corrosion testing device, in particular to a lead-bismuth material corrosion testing device.
Background
Lead-based fast reactors are the first fourth generation reactor expected to realize industrial demonstration and commercial applications. Since lead/bismuth is extremely corrosive to materials, especially at high temperatures, research into corrosion resistance of materials at high temperatures has become an important and primary problem in developing lead bismuth coolant reactors. The etching process is a physicochemical process that causes changes in the composition and microstructure of the material due to selective dissolution and intergranular corrosion, which can lead to material failure. In the non-isothermal loop, the liquid metal in the high-temperature part can dissolve certain components in the steel, and after saturation, dissolved corrosion products can be separated out in the low-temperature part of the loop along with the flow of the liquid metal, so that corrosion residues are formed, a pipeline is blocked, and serious consequences such as heat transfer deterioration, microstructure change of pipe wall materials and the like are caused. The accurate corrosion test of different working conditions is an important basis for evaluating the compatibility of materials with lead and lead-bismuth coolant.
At present, lead/lead bismuth static corrosion tests are carried out mainly by heating lead bismuth to a temperature above the melting point, then placing a sample into a molten lead/lead bismuth alloy, and then starting to heat up the whole test device and adjusting the oxygen concentration. Since the reduction time of the oxygen concentration in lead bismuth is long, it takes several days or several weeks to lower the oxygen concentration to the target value, leading to the sample having a preceding stage of saturated oxygen concentration corrosion, and thus leading to inaccurate evaluation of the oxide film.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a lead bismuth material corrosion testing device capable of improving testing accuracy.
The technical scheme adopted for solving the technical problems is as follows: the lead bismuth material corrosion testing device comprises a closed container for containing lead bismuth material, a telescopic mechanism and a ceramic rod for placing a sample to be tested;
the telescopic mechanism is arranged on the top surface of the closed container in a telescopic way, the ceramic rod is arranged in the telescopic mechanism and moves up and down in the closed container along with the telescopic action of the telescopic mechanism, so that a sample to be tested is positioned above the lead bismuth material in the closed container or inserted into the lead bismuth material.
Preferably, the telescopic mechanism comprises at least one corrugated pipe vertically connected to the top surface of the closed container, a limiting plate arranged at the top of the corrugated pipe and a lifting assembly arranged on the top surface of the closed container;
the ceramic rod is vertically arranged in the corrugated pipe, and the top of the ceramic rod is connected with the inner top surface of the corrugated pipe; the lifting assembly is connected with the limiting plate, and drives the corrugated pipe to compress or stretch through the limiting plate, so that the ceramic rod is driven to move up and down.
Preferably, the lifting assembly comprises at least one supporting screw rod vertically connected to the top surface of the closed container and a nut matched with the supporting screw rod;
the supporting screw rod is far away from the top of the closed container and penetrates through the limiting hole of the limiting plate, and the nut is matched with the supporting screw rod above the limiting plate.
Preferably, the lifting assembly comprises at least one cylinder.
Preferably, at least one positioning piece for separating and positioning the sample to be detected on the ceramic rod is arranged on one end of the ceramic rod facing the closed container; the positioning piece is detachable on the ceramic rod.
Preferably, the positioning member is a ceramic member.
Preferably, the closed container is provided with an air inlet and an air outlet.
Preferably, the lead bismuth material corrosion testing device further comprises a temperature measuring mechanism which is arranged on the closed container and used for measuring the temperature of the lead bismuth material.
Preferably, the temperature measuring mechanism comprises a thermocouple.
Preferably, the lead bismuth material corrosion testing device further comprises an oxygen sensor which is arranged on the closed container and used for detecting the oxygen concentration in the closed container.
According to the lead bismuth material corrosion testing device, the telescopic mechanism drives the ceramic rod to move up and down in the closed container, the insertion depth of the ceramic rod is adjusted, when the oxygen concentration of the lead bismuth material does not reach the target concentration, the sample to be tested on the ceramic rod is suspended above the lead bismuth material and is not inserted into the lead bismuth material, the problem of inaccurate testing caused by lead bismuth corrosion of the sample to be tested in the early debugging process is avoided, and further the corrosion testing accuracy of the sample to be tested is improved.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic perspective view of a lead bismuth material corrosion testing apparatus according to an embodiment of the present utility model;
FIG. 2 is a top view of a lead bismuth material corrosion testing apparatus according to an embodiment of the present utility model;
fig. 3 is a schematic cross-sectional view of the lead bismuth material corrosion testing apparatus shown in fig. 2 in the A-A direction.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
As shown in fig. 1 to 3, the lead bismuth material corrosion testing apparatus according to an embodiment of the present utility model includes a closed vessel 10, a telescopic mechanism 20, and a ceramic rod 30.
Wherein the closed container 10 is used for containing lead bismuth material 100; the telescopic mechanism 20 is retractably arranged on the top surface of the closed container 10; the ceramic rod 30 is used for placing the sample 200 to be tested, and is arranged in the telescopic mechanism 20, and moves up and down in the closed container 10 along with the telescopic action of the telescopic mechanism 20, so that the sample 200 to be tested is positioned above the lead bismuth material 100 in the closed container 10 or is inserted into the lead bismuth material 100, and the influence of the excessive oxygen concentration in the early stage of testing on the corrosion test can be eliminated.
Specifically, the closed vessel 10 is made of a corrosion-resistant material, particularly a material capable of resisting lead-bismuth corrosion, and may be, for example, a ceramic material such as alumina. Alternatively, the closed vessel 10 may be realized by an alumina crucible. The top cover of the hermetic container 10 may be formed of the flange cover 13 so that the telescopic mechanism 20 is mounted on the flange cover 13.
The closed container 10 is provided with an air inlet 11 and an air outlet 12 for delivering gas (e.g. introducing reducing gas) and discharging gas, respectively. The air inlet 11 and the air outlet 12 may be an opening structure or an interface formed on the top surface of the closed container 10, or may be formed on an air inlet pipe and an air outlet pipe which are communicated with the closed container 10.
The telescopic mechanism 20 is mounted on the top surface of the hermetic container 10, has a closed chamber therein communicating with the interior of the hermetic container 10, and the ceramic rod 30 is also enclosed in the closed chamber within the telescopic mechanism 20 and is capable of penetrating the top surface of the hermetic container 10 into the interior of the hermetic container 10. It will be appreciated that in order to communicate the inside of the closed vessel 10 with the closed chamber while allowing the ceramic rod 30 to pass therethrough, a through hole 14 is provided on the top surface of the closed vessel 10, and the telescopic mechanism 20 is provided above the through hole 14 and surrounds the outer periphery of the through hole 14.
In the present embodiment, as shown in fig. 1 and 3, the telescopic mechanism 20 includes at least one bellows 21, a limiting plate 22, and a lifting assembly. The bellows 21 is vertically attached to the top surface (flange cover 13) of the hermetic container 10, and the height of the bellows 21 on the top surface of the hermetic container 10 can be changed by compression, and the adjustment height thereof can be 0-150mm. The lower end of the bellows 21 can be tightly fitted in the through hole 14 on the closed container 10, and is communicated with the inside of the closed container 10 through the through hole 14, and the bellows 21 is closed and arranged away from the top surface of the closed container 10, so that gas leakage is avoided. The ceramic rod 30 is vertically arranged in the corrugated tube 21, and the top of the ceramic rod 30 is connected with the inner top surface of the corrugated tube 21.
The limiting plate 22 is disposed on the top of the bellows 21, and the lifting assembly is disposed on the top surface of the hermetic container 10 and connected with the limiting plate 22. The lifting assembly can lift on the top surface of the closed container 10, and drives the corrugated tube 21 to compress or stretch through the limiting plate 22, so as to drive the ceramic rod 30 to move up and down.
Alternatively, the lifting assembly may include at least one support screw 23 vertically coupled to the top surface of the hermetic container 10, and a nut (not shown) adapted to the support screw 23. The limiting plate 22 is provided with a limiting hole corresponding to the supporting screw 23, the supporting screw 23 is far away from the top of the closed container 10, penetrates through the limiting hole of the limiting plate 22, and the nut is matched on the supporting screw 23 above the limiting plate 22. When the nut is rotated, the nut can move up and down along the axial direction of the supporting screw 23, and meanwhile, the abutting limiting plate 22 is driven to move up and down along the axial direction of the supporting screw 23, and the movement of the limiting plate 22 also compresses the connected corrugated pipe 21 or drives the corrugated pipe 21 to stretch.
The limiting plate 22 can be a flange ring or an annular plate sleeved and fixed on the periphery of the top of the corrugated tube 21. The limiting plate 22 may also be provided with an annular plate with a cover 221, so that the cover 221 also closes the top of the bellows 21 when it is fitted over and secured to the top of the bellows 21.
To improve the stability of the expansion and contraction of the bellows 21, the lifting assembly includes at least two support screws 23, for example, two, three or more support screws 23, the support screws 23 are distributed at intervals along the circumferential direction of the bellows 21, and each support screw 23 is connected to a limiting plate 22 and is matched with at least one nut.
The support screw 23 and the nut can manually adjust the height of the corrugated tube 21, and further manually drive the ceramic rod 30 to move up and down.
Of course, the expansion and contraction of the bellows 21 may be automatically set as needed instead of manual operation. For example, the lifting assembly includes at least one cylinder; the cylinder is arranged on the top surface of the closed container 10 with the piston rod upwards, and the top of the piston rod is connected with a limiting plate 22. After the cylinder is started, the expansion and contraction of the piston rod also drives the corrugated pipe 21 to expand and contract through the limiting plate.
Inside the bellows 21 of the telescopic mechanism 20, the ceramic rod 30 may be provided with one, two or more, so as to test more samples simultaneously. Alternatively, the telescopic mechanism 20 comprises at least two corrugated pipes 21 which are distributed at intervals, and at least one ceramic rod 30 is arranged in each corrugated pipe 21.
In the present utility model, the ceramic rod 30 is a rod body made of a ceramic material (preferably alumina) and has lead-bismuth corrosion resistance, and is used as a fixing position of the sample 200 to be measured, so that the sample 200 to be measured is suspended in the closed container 10. The ceramic rod 30 is selected to eliminate the effects of other material components on the sample corrosion test.
The top of the ceramic rod 30 may be directly fixed to the inner top surface of the bellows 21. Alternatively, the top of the ceramic rod 30 is connected to a metal rod, and is fixed below the inner top surface of the bellows 21 by the metal rod.
In combination with the manner of fixing the ceramic rod 30 in the telescopic mechanism 20, the ceramic rod 30 is set with its lower end facing the inside of the closed casing 10 as a fixing position for the sample 200 to be measured. One or more samples 200 to be measured can be fixed at the lower end of the ceramic rod 30, the samples 200 to be measured can be fixed at the lower end of the ceramic rod 30 in a sleeved mode, and the samples 200 to be measured are spaced.
To space and position the sample 200 to be measured on the ceramic rod 30, at least one detachable positioning member 31 is provided on the lower end of the ceramic rod 30 facing the closed vessel 10. The positioning member 31 is provided with a through hole so as to be penetrated to the ceramic rod 30. When a sample 200 to be measured is mounted on the ceramic rod 30, the sample 200 to be measured is sleeved on the lower end of the ceramic rod 30, then the positioning piece 31 is sleeved, and the sample 200 to be measured is fixed on the ceramic rod 30 through the positioning piece 31 and fixed on the tail end of the ceramic rod 30. When a plurality of samples 200 to be measured are installed on the ceramic rod 30, a first sample 200 to be measured is sleeved on the lower end of the ceramic rod 30, a positioning piece 31 is sleeved on a second sample 200 to be measured, and the positioning piece 31 is positioned between two adjacent samples 200 to be measured, after all the samples 200 to be measured are installed, another positioning piece 31 is sleeved on the tail end of the ceramic rod 30, and all the samples 200 to be measured are fixed on the ceramic rod 30.
The sample 200 to be measured is typically provided in a sheet-like structure, such as a steel sheet. The positioning member 31 is a ceramic member, preferably made of the same material as the ceramic rod 30, and the combination of the ceramic rod 30 can maximally eliminate the influence of other material components on the corrosion test of the sample. In terms of structural form, the positioning member 31 may be, but is not limited to, a spherical, polyhedral, or the like structure.
Further, the lead bismuth material corrosion testing device of the present utility model further comprises a temperature measuring mechanism 40 which is arranged on the closed container 10 and is used for measuring the temperature of the lead bismuth material 100, and an oxygen sensor 50 which is arranged on the closed container 10 and is used for detecting the oxygen concentration in the closed container 10.
The temperature measuring mechanism 40 may specifically include a thermocouple that is disposed on the top surface of the hermetic container 10 and is inserted into the hermetic container 10. The oxygen sensor 50 may be specifically disposed on the top surface of the closed vessel 10 with its detection end inserted into the closed vessel 10.
In a preferred embodiment of the lead bismuth material corrosion testing device, the closed container is a ceramic crucible with the diameter of 100mm-200mm and the height of 150mm-200 mm; the number of the corrugated pipes is 1-3; the diameter of the supporting screw 23 is 4mm-8mm, and the length is 200mm-300mm; the ceramic rod 30 has a diameter of 2mm to 4mm and a length of 100mm to 150mm.
When the lead bismuth material corrosion testing device is applied, the solid lead bismuth material 100 is placed in the closed container 10, and the temperature is firstly increased to 150-200 ℃ to melt the solid lead bismuth material 100. Inserting the oxygen sensor 50 into the high temperature bismuth lead melt; bellows 21 of telescoping mechanism 20 suspend the sample (e.g., steel sheet) to be measured in the gas space above the melt of height Wen Qianbi. Then heating to the target temperature (500-600 ℃), introducing a reducing gas (the hydrogen amount accounts for 4% -12%) mixed by argon and hydrogen, and reducing the lead bismuth to the target oxygen concentration. The bellows 21 is compressed, the ceramic rod 30 is moved downwards, and the sample 200 to be tested is inserted into the high-temperature lead bismuth melt, and a subsequent static corrosion test is performed.
In the above process, the sample 200 to be tested is not inserted into the lead bismuth material 100 in the process of adjusting the temperature and the oxygen concentration, so that the influence of the lead bismuth material 100 on the sample to be tested is avoided, and the accuracy of the test result is improved.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (10)
1. The lead bismuth material corrosion testing device is characterized by comprising a closed container for containing lead bismuth material, a telescopic mechanism and a ceramic rod for placing a sample to be tested;
the telescopic mechanism is arranged on the top surface of the closed container in a telescopic way, the ceramic rod is arranged in the telescopic mechanism and moves up and down in the closed container along with the telescopic action of the telescopic mechanism, so that a sample to be tested is positioned above the lead bismuth material in the closed container or inserted into the lead bismuth material.
2. The lead bismuth material corrosion testing device according to claim 1, wherein the telescopic mechanism comprises at least one corrugated pipe vertically connected to the top surface of the closed container, a limiting plate arranged on the top of the corrugated pipe, and a lifting assembly arranged on the top surface of the closed container;
the ceramic rod is vertically arranged in the corrugated pipe, and the top of the ceramic rod is connected with the inner top surface of the corrugated pipe; the lifting assembly is connected with the limiting plate, and drives the corrugated pipe to compress or stretch through the limiting plate, so that the ceramic rod is driven to move up and down.
3. The lead bismuth material corrosion testing device according to claim 2, wherein the lifting assembly comprises at least one supporting screw rod vertically connected to the top surface of the closed container, and a nut matched with the supporting screw rod;
the supporting screw rod is far away from the top of the closed container and penetrates through the limiting hole of the limiting plate, and the nut is matched with the supporting screw rod above the limiting plate.
4. The lead bismuth material corrosion testing apparatus according to claim 2, wherein said lifting assembly comprises at least one cylinder.
5. The lead bismuth material corrosion testing apparatus according to any one of claims 1 to 4, wherein at least one positioning member for spacing and positioning a sample to be tested on the ceramic rod is provided on an end of the ceramic rod facing the closed container; the positioning piece is detachable on the ceramic rod.
6. The lead bismuth material corrosion test apparatus according to claim 5, wherein said positioning member is a ceramic member.
7. The lead bismuth material corrosion testing apparatus according to any one of claims 1 to 4, wherein the closed container is provided with an air inlet and an air outlet.
8. The lead bismuth material corrosion testing apparatus according to any one of claims 1 to 4, further comprising a temperature measuring mechanism provided on the closed container for measuring a temperature of the lead bismuth material.
9. The lead bismuth material corrosion test apparatus according to claim 8, wherein said temperature measuring mechanism comprises a thermocouple.
10. The lead bismuth material corrosion testing apparatus according to any one of claims 1 to 4, further comprising an oxygen sensor provided on the closed container for detecting an oxygen concentration in the closed container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322269752.5U CN220399219U (en) | 2023-08-22 | 2023-08-22 | Lead bismuth material corrosion testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322269752.5U CN220399219U (en) | 2023-08-22 | 2023-08-22 | Lead bismuth material corrosion testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220399219U true CN220399219U (en) | 2024-01-26 |
Family
ID=89614243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322269752.5U Active CN220399219U (en) | 2023-08-22 | 2023-08-22 | Lead bismuth material corrosion testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220399219U (en) |
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2023
- 2023-08-22 CN CN202322269752.5U patent/CN220399219U/en active Active
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