CN107817165A - A kind of device for being used to determine steel stress corrosion behavior in corrosive environment - Google Patents
A kind of device for being used to determine steel stress corrosion behavior in corrosive environment Download PDFInfo
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- CN107817165A CN107817165A CN201711219247.2A CN201711219247A CN107817165A CN 107817165 A CN107817165 A CN 107817165A CN 201711219247 A CN201711219247 A CN 201711219247A CN 107817165 A CN107817165 A CN 107817165A
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- inner casing
- base alloy
- stress corrosion
- medium
- corrosive
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- 238000005260 corrosion Methods 0.000 title claims abstract description 36
- 230000007797 corrosion Effects 0.000 title claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 14
- 239000010959 steel Substances 0.000 title claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 32
- 239000000956 alloy Substances 0.000 claims abstract description 32
- 239000010935 stainless steel Substances 0.000 claims abstract description 20
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 20
- 239000004411 aluminium Substances 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000006260 foam Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 3
- 238000011160 research Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 18
- 238000004154 testing of material Methods 0.000 abstract description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 19
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 description 11
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 11
- 239000007788 liquid Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 description 10
- 239000001569 carbon dioxide Substances 0.000 description 9
- 239000002699 waste material Substances 0.000 description 9
- 230000006399 behavior Effects 0.000 description 7
- 230000005291 magnetic effect Effects 0.000 description 7
- 238000007599 discharging Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- UUIQXOJHIQQZJE-UHFFFAOYSA-N S.O=[C] Chemical compound S.O=[C] UUIQXOJHIQQZJE-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003542 behavioural effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/024—Corrosive
Abstract
The present invention relates to oil gas field testing of materials field, discloses a kind of device for being used to determine steel stress corrosion behavior in corrosive environment, and described device includes inner casing, sample holding device, corrosive medium and is passed through system；The inner casing is seal casinghousing；The sample holding device includes being arranged on bottom nickel-base alloy sample rack, the top nickel-base alloy sample rack being arranged in the middle part of inner casing of inner shell bottom, fixed stainless steel magnetized medium, the inner casing are sequentially arranged above pressure sensor, electromagnet above the top nickel-base alloy sample rack；Filled with corrosive medium in the inner casing.Test of the present invention for sample under polynary environment provides effective device, and the device ensures the stability and accuracy of volatile media concentration in etchant solution in experimentation so that the experimental result accuracy tested out is high.
Description
Technical field
Present invention relates particularly to oil gas field testing of materials field, relates more specifically to a kind of for determining steel in corrosion ring
The device of stress corrosion behavior in border.
Background technology
In oil gas field industry, the complexity of the Service Environment change of material, cause material in use, easily lose
Brittle failure etc. is imitated, and stress corrosion cracking is one kind in numerous corrosion failure behaviors, because its Producing reason is that material is corroding
In environment, under conditions of certain tension, unexpected generating material brittle failure, harmfulness pole in the case of the obvious omens of Chang Wu
It is big to be evaluated, it is necessary to carry out related experiment test.
Slowly strained tensile is approved as stress corrosion test and assessment method, depth by numerous scholars, but because of test device
The reason for, cause corrosive medium during test not seal so that its test device is only capable of testing some corrosion Jie using being limited
Matter is the material of fixedness, and test effect is undesirable, such as tests chlorion stress corrosion behavioral study, rotten for volatile-type
Medium is lost, stress corrosion test evaluation can not be carried out.
The content of the invention
It is volatilizable due to having in corrosive medium to solve the stress corrosion of material under corrosion system in the prior art evaluation
Gas, causes the existing experimental provision used can not carry out evaluation problem, and the present invention provides a kind of for determining steel in corrosion ring
The device of stress corrosion behavior in border.
The present invention adopts the following technical scheme that：A kind of dress for being used to determine steel stress corrosion behavior in corrosive environment
Put, described device includes inner casing, sample holding device, corrosive medium and is passed through system；The inner casing is seal casinghousing；The sample
Clamping device includes being arranged on the bottom nickel-base alloy sample rack of inner shell bottom, the top nickel-base alloy sample being arranged in the middle part of inner casing
Frame, the fixed stainless steel magnetized medium in top nickel-base alloy sample rack top；The inner casing is sequentially arranged above pressure sensor, electricity
Magnet；Filled with corrosive medium in the inner casing.
Aluminium foam sandwich is set between the top nickel-base alloy sample rack and stainless steel magnetized medium.
Described device includes Research on Automatic Measuring System of Temperature, and the system includes heating wire, galvanic couple room, thermocouple, and the heating wire is set
Put in corrosive medium of the inner wall outside for heating tensile sample region；Inner casing is stretched into the galvanic couple room；The thermocouple
Insert galvanic couple room.
Cooling tube is set on the outside of the inner casing, and the cooling tube is arranged between stainless steel magnetized medium and inner casing top.
The heating wire on the outside of cooling tube with being respectively provided with foamed aluminium.
Shell is set on the outside of the foamed aluminium.
The present invention carries out the tension of slow strained tensile using electromagnet magnetic force, makes steel stress corrosion in corrosive environment
The test of behavior can realize completion, enable in particular to ensure the high volatile corrosive medium sealing during slow strained tensile
Property, security during experimenter's experiment is fully ensured that, while ensure that volatile media is dense in etchant solution in experimentation
The stability and accuracy of degree so that the experimental result accuracy tested out is high.
Brief description of the drawings
Fig. 1 is apparatus of the present invention structural representation.
Symbol description
1st, electromagnet；2nd, shell；3rd, cooling water pipe；4th, pressure sensor；5th, foamed aluminium 6, inner casing；7th, at the top of inner casing；8th, corrode
Medium solution；9th, top nickel-base alloy sample rack；10th, aluminium foam sandwich；11st, stainless steel magnetized medium；12nd, top sample rack fixes spiral shell
Bolt；13rd, hydrogen sulfide access tube；14th, hydrogen sulfide is passed through control valve；15th, thermocouple room；16th, thermocouple；17th, discharging of waste liquid passage；
18th, discharging of waste liquid control valve；19th, carbon dioxide access tube；20th, carbon dioxide is passed through control valve；21st, sodium carbonate liquor is passed through
Hole；22nd, sodium carbonate liquor is passed through control valve；23rd, bottom nickel-base alloy sample rack；24th, bottom sample rack fixing bolt；25th, sample is solid
Clamp；26th, heating wire；27th, tensile sample；28th, fixing bolt at the top of inner casing.
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
A kind of device for being used to determine steel stress corrosion behavior in corrosive environment, described device include inner casing 6, sample
Clamping device, corrosive medium are passed through system；The inner casing is seal casinghousing；The sample holding device includes being arranged on inner casing 6
The bottom nickel-base alloy sample rack 23 of bottom, the top nickel-base alloy sample rack 9 for being arranged on the middle part of inner casing 6, the top nickel-base alloy sample
The fixed stainless steel magnetized medium 11 in the top of frame 9, the inner casing 6 is sequentially arranged above pressure sensor 4, electromagnet 1；The inner casing
It is interior filled with corrosive medium.
Because etchant gas is difficult to control in test process, usually there is leakage problem in the test of sample in tradition,
Jeopardize staff's health, make sample can not complete to test in such circumstances.Based on this, the present invention innovatively use by
Electromagnet 1, pressure sensor 4 and the three of stainless steel magnetized medium 11 are used cooperatively, to test energy of the sample under corrosive environment
It is enough to realize.
Aluminium foam sandwich 10 is set between the top nickel-base alloy sample rack 9 and stainless steel magnetized medium 11.The top,
Bottom nickel-base alloy sample rack 9,23 fixes sample bottom, it is further preferred that setting examination in upper and lower part nickel-base alloy sample rack 23
Sample geometrical clamp 25, sample is fixed on top nickel-base alloy sample rack 9 and bottom nickel-base alloy respectively with two sample fixation clamps 25
In sample rack 23, aluminium foam sandwich 10 is loaded in top nickel-base alloy sample rack 9, stainless steel magnetized medium 11 is put above, uses top
Sample rack fixing bolt 12 connects top nickel-base alloy sample rack 9, aluminium foam sandwich 10 and stainless steel magnetized medium 11.Foam
Aluminium interlayer 10 is located among stainless steel casing 2 and nickel-base alloy inner casing 6, plays insulation separated magnetic effect, and whole sealing system plays envelope
Fill the effect of corrosive medium.
Described device includes Research on Automatic Measuring System of Temperature, and the system includes heating wire 26, galvanic couple room 15, thermocouple 16, the electricity
Heated filament 26 is arranged on the corrosive medium that inner wall outside is used to heat tensile sample region；Inner casing is stretched into the galvanic couple room 15；
The thermocouple 16 inserts galvanic couple room 15, by passing through temperature feedback control heating wire 26 so that test temperature is balanced.
Cooling tube 3 is set on the outside of the inner casing, the cooling tube 3 be arranged at the top of stainless steel magnetized medium 11 and inner casing 7 it
Between, cooling water pipe 3 keeps inner casing upper temp in room temperature state.Inner casing upper temp is set in room temperature state to be to ensure top
Electromagnet and stainless steel magnetic conduction between magnetic field and electromagnetic force be affected by temperature, temperature is too high to be caused under electromagnetic force
Drop, can cause to stretch hypodynamic state.
The heating wire 26 is respectively provided with foamed aluminium 5 with the outside of cooling tube 3., can using foamed aluminium every magnetic and heat insulating ability
Ensure experimenter's electromagnetic radiation, and can ensure that the holding of the temperature of sample local environment is stable.
The outside of foamed aluminium 5 sets shell 2.
The course of work：Open 7 at the top of inner casing, tensile sample 27 is fixed on bottom nickel-base alloy sample with sample fixation clamp 25
On frame, pour into the solution of sodium chloride-containing and be fixed on tensile sample 27 in nickel-base alloy inner casing 6, then with sample fixation clamp 25
In portion's nickel-base alloy sample rack 9, aluminium foam sandwich 10 is loaded in top nickel-base alloy sample rack 9, puts stainless steel magnetized medium above
11, top nickel-base alloy sample rack 9, aluminium foam sandwich 10 and stainless steel magnetized medium 11 are connected with top sample rack fixing bolt 12
Get up；The solution of sodium chloride-containing is poured into again, is covered 7 at the top of inner casing, is sealed with 7 fixing bolts at the top of inner casing close；7 at the top of inner casing
On bleed off pressure force snesor 4, discharge magnet 1 on pressure sensor 4.
Open sodium carbonate liquor to be passed through control valve 22, be passed through nitrogen at sodium carbonate liquor access apertures 21, remove corrosion and be situated between
Oxygen in matter；Closing control valve 22 opens hydrogen sulfide and is passed through control valve 14, is passed through in hydrogen sulfide on entrance 13 and is passed through hydrogen sulfide；Beat
Open carbon dioxide and be passed through control valve 20, carbon dioxide is passed through in carbon dioxide access apertures 19.Keep the pressure and two of hydrogen sulfide
Carbon oxide pressure, form ternary corrosion system.
Thermocouple 16 is inserted in thermocouple room 15, the heating of the galvanization of heating wire 26, passes through temperature feedback control heating wire
26 so that test temperature reaches requirement of experiment, while opens cooling water pipe 3 and keep upper temp in room temperature state.
Electromagnet 1 is powered, and magnetization stainless steel magnetized medium 11, attracts stainless steel magnetized medium 11, and then drive top nickel
Based alloy sample rack 9 pulls tensile sample 27, it is stressed corrosion in corrosive medium by tension, is sensed by power
The electric current of the feedback regulation electromagnet 1 of device 4 and then the suction for controlling electromagnet；And force value and record force value are set.
After tensile sample 27 is broken, closing hydrogen sulfide is passed through control valve 14 and carbon dioxide is passed through control valve 20, opens useless
Liquid exhaust-control valve 18, drained into discharging of waste liquid hole 17 by waste liquid is corroded in sodium carbonate liquor or in sodium hydroxide solution；Wait to hold
When corrosive medium in device is drained soon, opens sodium carbonate liquor and be passed through control valve 22, it is molten to the sodium carbonate that is passed through a small amount of in device
Liquid, then by discharging of waste liquid hole 17 exclude waste liquid, after such 5-6 time, can opening apparatus, remove tensile sample 27, carry out fracture divide
Analysis.
Because oil gas field corrosive environment is complex, multiclass corrosive medium is frequently accompanied by, is influenced each other, to the stress of material
Corrosion evaluation proposes higher requirement, and H2S、CO2、Cl-Corrosion as mainly several corrosive environments, its composition
Corrosive medium system H2S-CO2-Cl-The stress corrosion evaluation of material is volatilizable due to having in corrosive medium under ternary corrosion system
H2S and CO2It gas, can not seal, cause the existing experimental provision used not evaluated, cause H2S-CO2-Cl-Ternary is rotten
The difficulty that material selection under erosion system becomes, present invention is particularly suitable for H2S-CO2-Cl-Ternary corrosion system.
When corrosive medium is H2S-CO2-Cl-During ternary corrosion system, the corrosive medium is passed through system by corrosive medium
Into inner casing 6.The corrosive medium is passed through system and is passed through including carbon dioxide access tube 20, discharging of waste liquid passage 17, hydrogen sulfide
Pipe 13, sodium carbonate liquor access tube 21, the corrosive medium is passed through system, and to be arranged on top nickel-base alloy sample rack 9 Ni-based with bottom
Between alloy sample rack 23；Carbon dioxide is set to be passed through control valve 20 on the carbon dioxide access tube 20；Hydrogen sulfide access tube 13
Upper setting hydrogen sulfide is passed through control valve 14；Sodium carbonate liquor is set to be passed through control valve 22 on sodium carbonate liquor access tube 21；Waste liquid
Discharging of waste liquid control valve 18 is set on discharge-channel 17.
The present invention carries out the tension of slow strained tensile using electromagnet magnetic force, it is ensured that during slow strained tensile
High volatile corrosive medium sealing, security during experimenter's experiment is fully ensured that, while ensured rotten in experimentation
Lose the stability and accuracy of volatile media concentration in solution so that the experimental result tested out has accuracy；Utilize bubble
Foam aluminium every magnetic and heat insulating ability, it is ensured that experimenter's electromagnetic radiation, and the holding of the temperature of sample local environment can be ensured
It is stable；The present invention can carry out material and download H in different temperatures, various concentrations condition2S-CO2-Cl-The stress of ternary corrosion system
Corrosion test and evaluation, different temperatures, the polynary sulfide hydrogen of various concentrations complicated condition can not be carried out by overcoming other equipment
Stress corrosion is tested, wide adaptability.
Claims (6)
1. a kind of device for being used to determine steel stress corrosion behavior in corrosive environment, it is characterised in that described device includes
Inner casing（6）, sample holding device, corrosive medium be passed through system；The inner casing（6）For seal casinghousing；The sample holding device
Including being arranged on inner casing（6）The bottom nickel-base alloy sample rack of bottom（23）, be arranged on inner casing（6）The top nickel-base alloy sample at middle part
Frame（9）, the top nickel-base alloy sample rack（9）Stainless steel magnetized medium is fixed in top（11）；The inner casing（6）It is sequentially arranged above
Pressure sensor（4）, electromagnet（1）；The inner casing（6）It is interior filled with corrosive medium.
2. the device according to claim 1 for being used to determine steel stress corrosion behavior in corrosive environment, its feature exist
In the top nickel-base alloy sample rack（9）With stainless steel magnetized medium（11）Between aluminium foam sandwich is set（10）.
3. the device according to claim 1 for being used to determine steel stress corrosion behavior in corrosive environment, its feature exist
In described device includes Research on Automatic Measuring System of Temperature, and the system includes heating wire（26）, galvanic couple room（15）, thermocouple（16）, the electricity
Heated filament（26）It is arranged on the corrosive medium that inner wall outside is used to heat tensile sample region；The galvanic couple room（15）In stretching into
Shell；The thermocouple（16）Insert galvanic couple room（15）.
4. the device according to claim 1 for being used to determine steel stress corrosion behavior in corrosive environment, its feature exist
In setting cooling tube on the outside of the inner casing（3）, the cooling tube（3）It is arranged on stainless steel magnetized medium（11）With inner casing top（7）
Between.
5. the device according to claim 1 for being used to determine steel stress corrosion behavior in corrosive environment, its feature exist
In the heating wire（26）With cooling tube（3）Outside is respectively provided with foamed aluminium（5）.
6. the device according to claim 1 for being used to determine steel stress corrosion behavior in corrosive environment, its feature exist
In the foamed aluminium（5）Outside sets shell（2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711219247.2A CN107817165A (en) | 2017-11-28 | 2017-11-28 | A kind of device for being used to determine steel stress corrosion behavior in corrosive environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711219247.2A CN107817165A (en) | 2017-11-28 | 2017-11-28 | A kind of device for being used to determine steel stress corrosion behavior in corrosive environment |
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| CN107817165A true CN107817165A (en) | 2018-03-20 |
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| CN201711219247.2A Pending CN107817165A (en) | 2017-11-28 | 2017-11-28 | A kind of device for being used to determine steel stress corrosion behavior in corrosive environment |
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Cited By (4)
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| CN108760550A (en) * | 2018-05-17 | 2018-11-06 | 郝文峰 | The experimental provision that material internal deforms under a kind of measurement corrosive environment |
| CN110361260A (en) * | 2018-04-11 | 2019-10-22 | 上海航空材料结构检测股份有限公司 | Stress corrosion testing device and test method of the thick sample in Strong oxdiative solution |
| CN111795923A (en) * | 2020-08-24 | 2020-10-20 | 兰州金川科力远电池有限公司 | Method for rapidly testing corrosion resistance of hydrogen storage alloy powder |
| CN112198048A (en) * | 2020-12-07 | 2021-01-08 | 南京仪汇仪器设备有限公司 | Textile fiber strength detection equipment |
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