CN110231218A - The constant strain stress corrosion testing device and its test method of a kind of analog scene corrosive environment - Google Patents
The constant strain stress corrosion testing device and its test method of a kind of analog scene corrosive environment Download PDFInfo
- Publication number
- CN110231218A CN110231218A CN201910680130.7A CN201910680130A CN110231218A CN 110231218 A CN110231218 A CN 110231218A CN 201910680130 A CN201910680130 A CN 201910680130A CN 110231218 A CN110231218 A CN 110231218A
- Authority
- CN
- China
- Prior art keywords
- foil gauge
- curved arc
- sealing
- test
- data
- 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.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 238000005260 corrosion Methods 0.000 title claims abstract description 47
- 230000007797 corrosion Effects 0.000 title claims abstract description 46
- 238000010998 test method Methods 0.000 title abstract description 7
- 239000011888 foil Substances 0.000 claims abstract description 102
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000004088 simulation Methods 0.000 claims abstract description 11
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 95
- 238000012856 packing Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 11
- 229910000856 hastalloy Inorganic materials 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000036760 body temperature Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000006392 deoxygenation reaction Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 239000000523 sample Substances 0.000 claims 21
- 238000000605 extraction Methods 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 5
- 229910000975 Carbon steel Inorganic materials 0.000 description 9
- 239000010962 carbon steel Substances 0.000 description 7
- 239000007769 metal material Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000008398 formation water Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000397426 Centroberyx lineatus Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording 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
-
- 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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The present invention relates to a kind of constant strain stress corrosion device of analog scene corrosive environment and its test methods, it, which is characterized by, can directly simulate live military service operating condition, the timing node of accurate control loading stress and the stress corrosion cracking of judgement generation in time specifically includes that seal pot, curved arc sample, corrosive medium, foil gauge and deformeter so as to shorten invalid test period.The present invention simulates underground sour corrosion environment using seal pot；Meanwhile monitoring foil gauge registration, the timing node that the strain variation of curved arc sample and curved arc sample are broken during being tested.Energy real simulation of the present invention underground sour corrosion environment, accurately and efficiently evaluates practicability of the material in corrosive environment, provides sorting basis for harshness corrosive environment.
Description
Technical field
The present invention relates to during a kind of constant strain stress corrosion for the analog scene corrosive environment of curved arc sample
The test method of strain testing is tested, the invention further relates to use strain variation process in this method test stress corrosion test
Experimental rig.
Background technique
Stress corrosion refers to the corrosion behavior that metal material occurs in tensile stress and specific environment, and stress corrosion can make
At catastrophic break of the metal material under low-stress, huge economic loss will lead to, in the oil industry, stress is rotten
Erosion is corrosion failure form the most universal.Therefore, the stress corrosion evaluation for carrying out material, carries out stress-corrosion cracking life to material
Assessment is very important.
There are three types of currently used stress corrosion (cracking) test methods: constant strain, constant load and slow strain rate tension.Due to perseverance
Strain analog and the related stress that fails of being on active service, therefore constant strain is most popular a kind of test.The advantages of constant strain
Mainly: device is simple and convenient to operate and sample is compact, is a kind of test method of quantitatively analyzing material performance.It is open at present
Constant strain test method rely primarily on method reduction test period of precrack, but precrack is to the processing request of sample
It is higher, considerably increase test difficulty；It is the outer diameter deflection by sample and in presently disclosed constant strain experimental rig
Loading stress is determined, can not precise measurement compared with deflection under big load；In addition, in presently disclosed constant strain experimental rig,
Experimental condition is that normal temperature and pressure can not accurate simulation scene military service operating condition.
Therefore, to shorten invalid test period, loading stress is accurately controlled, live military service operating condition, the present invention are directly simulated
Propose a kind of constant strain stress corrosion testing device and its test method.
Summary of the invention
The purpose of the present invention is to provide it is a kind of can real simulation downhole corrosion environment, be characterized by can accurately control plus
Stress is carried, invalid test period is shortened, directly simulates live military service operating condition, and is the choosing of sour corrosion environment according to test result
Material provides guidance.What the object of the invention was achieved through the following technical solutions:
A kind of constant strain stress corrosion device of analog scene corrosive environment, specifically includes that seal pot assembly and reaction
Assembly；
The seal pot assembly of the constant strain stress corrosion device of analog scene proposed by the present invention corrosive environment, it is main to wrap
It includes: sealing autoclave body, sealing kettle cover, sealing station, corrosion test chamber, air inlet, gas outlet, fixing bolt, fixing bolt washer, swallow
Tail washer, tapered packing, signal linear sealing bucket, airtight and watertight padding, signal linear sealing bucket washer, annulus packing, annulus washer.Sealing
Kettle cover is fixed on sealing autoclave body by fixing bolt, has corrosion test chamber inside seal pot body, and seal pot has heating in vitro
Device and insulating layer, sealing autoclave body bottom are provided with air inlet, and gas outlet is provided in sealing station, and sealing station will be bored by pressure in kettle
Type packing and dovetail washer are pressed under sealing kettle cover, and signal linear sealing bucket and sealing station have signal wire close by being threadedly coupled
The protection of bucket washer is sealed, by annulus washer and annulus packing_seal between signal linear sealing bucket and sealing station, in signal linear sealing bucket
Fill airtight and watertight padding.
The reaction assembly of the constant strain stress corrosion device of analog scene proposed by the present invention corrosive environment, it is main to wrap
It includes: deformeter, test(ing) medium, foil gauge lead, curved arc sample, load nut, clamp nut, load screw rod, curved arc specimen holder
Tool, determines foil gauge, data foil gauge, outer defeated signal wire at groove gasket.Curved arc sample is by curved arc specimen holder and fixture spiral shell
It is placed in the intracavitary test(ing) medium of corrosion test, has between load screw rod and load nut and curved arc sample embedded after mother is fixed
It is respectively transition fit and interference fit, curved arc sample between washer protection, groove gasket and curved arc sample and load screw rod
Data foil gauge and judgement foil gauge are pasted on screw rod respectively with loading, foil gauge lead is by data foil gauge or determines to strain
Piece is connected with outer defeated signal wire, and outer defeated signal wire accesses deformeter after passing through signal linear sealing bucket.
Further, 4 tapered packings and 3 annulus packings are polytetrafluoroethylene material, dovetail washer and
Annulus washer material is Hastelloy, and signal linear sealing bucket and signal linear sealing bucket washer are Hastelloy material, airtight and watertight padding
For the fire-retardant airtight and watertight padding of high-strength waterproof；Tapered packing and dovetail washer use sealing means of the conical surface to the conical surface, annulus packing
Equally use plane to the sealing means of plane with annulus washer, cone angle is 120 ° to tapered packing up and down, is sitting in sealing station
First tapered packing have a plane, dovetail washer has flat surface and dove-tail form concave surface, machined six at the top of signal linear sealing bucket
Angle nut shape and thickened area machined external screw thread, signal linear sealing bucket and sealing station as air-tightness threaded connection.
Further, the curved arc specimen holder and groove gasket are polytetrafluoroethylene (PTFE) material, load nut, folder
Tool nut and load screw rod are process by Hastelloy, and test(ing) medium is field working conditions condition simulation solution；Curved arc sample
Radian be 200 °~300 °, the circular arc vertex of curved arc sample is adhesive with 3 or 5 data foil gauges, loads and is adhesive with 3 on screw rod
Or 5 judgement foil gauges, curved arc specimen holder by clamp nut be fixed on curved arc sample both ends make curved arc sample not with sealing
Autoclave body contact, tests every time and 3 or 5 curved arc samples is housed in seal pot body, and foil gauge lead is received after connecting with outer defeated signal wire
Beam entering signal linear sealing bucket, outer defeated signal wire pass through signal linear sealing bucket and access deformeter.
The beneficial effects of the present invention are: (1) is strained by the load that deformeter monitors curved arc sample, load is accurately controlled
Stress is design stress；(2) curved arc sample is monitored by deformeter and loads the stress variation of screw rod during the test, can sentenced
Whether curved arc sample is broken in advance during disconnected test, reduces extra test duration；(3) high using seal pot simulation high temperature
The underground material military service operating condition of pressure can accurately learn that service life and stress corrosion of the metal material at the scene under operating condition are sensitive
Property.
Detailed description of the invention
Fig. 1 is the schematic diagram of structure of the invention.
Fig. 2 is the main view of curved arc sample after load.
Fig. 3 is the top view of curved arc sample after load.
Fig. 4 is the schematic diagram of signal linear sealing bucket and sealing station sealing
Fig. 5 is the schematic diagram of signal linear sealing bucket.
Fig. 6 is the schematic diagram of curved arc sample.
Fig. 7 is the semi-cutaway of curved arc specimen holder.
Fig. 8 is the cross-sectional view of groove gasket.
Specific embodiment
Below in conjunction with example, the present invention is further described:
Example 1
This example discloses a kind of constant strain stress etching experiment method of live corrosive environment of metal material simulation, with P110
For carbon steel, comprising the following steps:
Step 1 prepares 3 P110 carbon steels (curved arc sample), and the outer diameter of curved arc sample is 86.80mm, wall thickness is
6.65mm, width 15.65mm, according to the live corrosive environment configuration simulated formation aqueous solution of required simulation as test(ing) medium
(6), determine that P110 carbon steel (curved arc sample) loaded load is 770MPa；
Step 2 prepares to paste foil gauge, and each sample respectively prepares 3 data foil gauges (23) and determines foil gauge
(22), curved arc sample (16) and load screw rod (19) patch location are polished with fine sandpaper, guarantees surface roughness 1.6
On, curved arc sample is cleaned with acetone, then uses alcohol washes, then dry up curved arc specimen surface, guarantees to clean at patch；
Step 3 pastes foil gauge, checks that foil gauge (22) whether there is or not damages for data foil gauge (23) and judgement, then with dedicated
Binder by data foil gauge (23) and will determine that foil gauge (22) are attached on curved arc sample (16) and load screw rod (19) respectively,
Foil gauge is compressed, then extra binder is squeezed out；
Foil gauge connecting terminal is sticked near foil gauge and draws foil gauge by step 4, weld strain piece lead (15)
Line and connecting terminal with welding together, guarantee between foil gauge and between foil gauge and curved arc sample it is not short-circuit；
Step 5 seals the data foil gauge (23) on each sample up for safekeeping respectively and determines foil gauge (22), foil gauge is used
It is dedicated to seal agent up for safekeeping and seal up for safekeeping, with waterproof, prevent foil gauge and corrosive medium from contacting, and successively number foil gauge；
Step 6, loaded load, outer defeated signal wire (24) are connected on deformeter (1), using load nut (17) and add
Screw rod (19) loading stress is carried, curved arc specimen holder (20) is fixed on sample both ends, passed through deformeter (1) by clamp nut (18)
Each data foil gauge (23) registration is monitored, it is 3850 × 10 that control, which loads strain,-6±7.7×10-6In range, load
Outer defeated signal wire (24) is disconnected with deformeter (1) after；
Step 7 successively (12) overlays tapered packing in sealing station, and dovetail washer (11) is pressed in tapered packing (12)
On, sealing station (4) is sitting in sealing autoclave body (2), is tightened fixing bolt (9) for sealing kettle cover (3) and is fastened on sealing autoclave body (2)
On；
Step 8, fixed signal line are convergent on signal wire after connecting foil gauge lead (15) and outer defeated signal wire (24)
It seals in bucket (13), outer defeated signal wire (24) is drawn by sealing station by signal linear sealing bucket (13), successively by annulus packing
(26) it is sitting at the step that sealing station (4) is connect with signal linear sealing bucket (13) with annulus washer (27), by signal linear sealing
The nut top of bucket (13) by signal linear sealing bucket precession sealing station and compresses annulus washer (27) and annulus packing (26)；
Step 9 adds simulated formation water, simulated formation water is added in corrosion test chamber (5), by air inlet (7), outlet
Mouth (8) is respectively connected to H2S、CO2And N2Gas cylinder and exhaust treatment system；
Step 10, the Ventiation Testing that heats up are passed through after carrying out abundant deoxygenation to test(ing) medium (6) in corrosion test chamber (5)
The H of 1MPa2The CO of S gas and 6MPa2, reach 80 DEG C to autoclave body temperature, the record time starts to test；
Step 11 passes through the strain variation of deformeter (1) monitoring data foil gauge (23) and judgement foil gauge (22), hair
Existing 3 data foil gauges are not read, and 3 judgement foil gauge (22) data are below 354.6 × 10-6, judge that P110 is (curved
Arc style) it is broken, stop test, record experimental period is 62h；
Step 12 records P110 carbon steel stress corrosion (cracking) test data, is passed through N after test terminates2Gas 3 hours abundant
Remove H2The corrosive gas such as S unload curved arc sample (16), carry out crack detection, surface corrosion pattern and corrosion product point
Analysis.
Example 2
This example discloses a kind of constant strain stress etching experiment method of live corrosive environment of metal material simulation, with N80
For carbon steel, comprising the following steps:
Step 1 prepares 3 N80 carbon steels (curved arc sample), the outer diameter of curved arc sample is 87.26mm, wall thickness 6.53mm,
Width is 15.36mm, according to the live corrosive environment configuration simulated formation aqueous solution of required simulation as test(ing) medium (6), is determined
N80 carbon steel (curved arc sample) loaded load is 545MPa；
Step 2 prepares to paste foil gauge, and each sample respectively prepares 3 data foil gauges (23) and determines foil gauge
(22), curved arc sample (16) and load screw rod (19) patch location are polished with fine sandpaper, guarantees surface roughness 1.6
On, curved arc sample is cleaned with acetone, then uses alcohol washes, then dry up curved arc specimen surface, guarantees to clean at patch；
Step 3 pastes foil gauge, checks that foil gauge (22) whether there is or not damages for data foil gauge (23) and judgement, then with dedicated
Binder by data foil gauge (23) and will determine that foil gauge (22) are attached on curved arc sample (16) and load screw rod (19) respectively,
Foil gauge is compressed, then extra binder is squeezed out；
Foil gauge connecting terminal is sticked near foil gauge and draws foil gauge by step 4, weld strain piece lead (15)
Line and connecting terminal with welding together, guarantee between foil gauge and between foil gauge and curved arc sample it is not short-circuit；
Step 5 seals the data foil gauge (23) on each sample up for safekeeping respectively and determines foil gauge (22), foil gauge is used
It is dedicated to seal agent up for safekeeping and seal up for safekeeping, with waterproof, prevent foil gauge and corrosive medium from contacting, and successively number foil gauge；
Step 6, loaded load, outer defeated signal wire (24) are connected on deformeter (1), using load nut (17) and add
Screw rod (19) loading stress is carried, curved arc specimen holder (20) is fixed on sample both ends, passed through deformeter (1) by clamp nut (18)
Each data foil gauge (23) registration is monitored, it is 2725 × 10 that control, which loads strain,-6±5.45×10-6In range, load
Outer defeated signal wire (24) is disconnected with deformeter (1) after；
Step 7 successively (12) overlays tapered packing in sealing station, and dovetail washer (11) is pressed in tapered packing (12)
On, sealing station (4) is sitting in sealing autoclave body (2), is tightened fixing bolt (9) for sealing kettle cover (3) and is fastened on sealing autoclave body (2)
On；
Step 8, fixed signal line are convergent on signal wire after connecting foil gauge lead (15) and outer defeated signal wire (24)
It seals in bucket (13), outer defeated signal wire (24) is drawn by sealing station by signal linear sealing bucket (13), successively by annulus packing
(26) it is sitting at the step that sealing station (4) is connect with signal linear sealing bucket (13) with annulus washer (27), by signal linear sealing
The nut top of bucket (13) by signal linear sealing bucket precession sealing station and compresses annulus washer (27) and annulus packing (26)；
Step 9 adds simulated formation water, simulated formation water is added in corrosion test chamber (5), by air inlet (7), outlet
Mouth (8) is respectively connected to H2S、CO2And N2Gas cylinder and exhaust treatment system；
Step 10, the Ventiation Testing that heats up are passed through after carrying out abundant deoxygenation to test(ing) medium (6) in corrosion test chamber (5)
The H of 1MPa2The CO of S gas and 6MPa2, reach 80 DEG C to autoclave body temperature, the record time starts to test；
Step 11 passes through the strain variation of deformeter (1) monitoring data foil gauge (23) and judgement foil gauge (22), hair
Determine that foil gauge (22) data are above 235.8 × 10 in existing 72h-6, and data foil gauge (23) data are complete, judge N80 carbon
Steel (curved arc style) is not broken, and record tests the time as 72h；
Step 12 records N80 carbon steel stress corrosion (cracking) test data, is passed through N after test terminates2It sufficiently goes within gas 3 hours
Except H2The corrosive gas such as S unload curved arc sample (16), carry out surface corrosion pattern and corrosion product analysis.
Finally, it should be noted that above example is only used to illustrate the technical scheme of the present invention, rather than its limitations；Although ginseng
According to aforementioned each example, invention is explained in detail, those skilled in the art should understand that；It still can be with
The technical solution recorded to previous examples is modified, or equivalent substitution of some or all of the technical features；And
These are modified or replaceed, the range for present example technical solution that it does not separate the essence of the corresponding technical solution.
Claims (4)
1. a kind of constant strain stress corrosion device of analog scene corrosive environment, it is characterised in that: the analog scene
The constant strain stress corrosion device of corrosive environment includes seal pot assembly and reaction assembly；
The seal pot assembly includes sealing autoclave body (2), sealing kettle cover (3), sealing station (4), corrosion test chamber (5), air inlet
Mouth (7), gas outlet (8), fixing bolt (9), fixing bolt washer (10), dovetail washer (11), tapered packing (12), signal wire
Seal bucket (13), airtight and watertight padding (14), signal linear sealing bucket washer (25), annulus packing (26), annulus washer (27), seal pot
Lid (3) is fixed on sealing autoclave body (2) by fixing bolt (9), has corrosion test chamber (5) inside sealing autoclave body (2), sealing
Autoclave body (2) bottom is provided with air inlet (7), is provided in sealing station (4) gas outlet (8), and sealing station (4) will be tapered by pressure in kettle
Packing (12) and dovetail washer (11) are pressed under sealing kettle cover (3), and signal linear sealing bucket (13) and sealing station (4) are connected by screw thread
It connects, and has signal linear sealing bucket washer (25) protection, by annulus washer (27) between signal linear sealing bucket (13) and sealing station (4)
It is sealed with annulus packing (26), fills airtight and watertight padding (14) in signal linear sealing bucket (13)；
The reaction assembly includes deformeter (1), test(ing) medium (6), foil gauge lead (15), curved arc sample (16), load
Nut (17), load screw rod (19), curved arc specimen holder (20), groove gasket (21), determines foil gauge at clamp nut (18)
(22), data foil gauge (23), outer defeated signal wire (24), curved arc sample (16) is by curved arc specimen holder (20) and clamp nut
(18) it is placed in the test(ing) medium (6) in corrosion test chamber (5) after fixing, loads screw rod (19) and load nut (17) and curved arc
There is groove gasket (21) protection between sample, divides between groove gasket (21) and curved arc sample (16) and load screw rod (19)
Not Wei transition fit and interference fit, curved arc sample (16) and load screw rod (18) on be pasted with respectively data foil gauge (23) and
Determine foil gauge (22), foil gauge lead (15) is by data foil gauge (23) or determines foil gauge (22) and outer defeated signal wire (24)
Connection, outer defeated signal wire (24) access deformeter (1) by signal linear sealing bucket (13) afterwards.
2. a kind of constant strain stress corrosion device of analog scene corrosive environment according to claim 1, feature exist
In: the tapered packing (12) and annulus packing (26) is polytetrafluoroethylene material, dovetail washer (11) and annulus washer
(27) material is Hastelloy, and signal linear sealing bucket (13) is Hastelloy material, and airtight and watertight padding (14) is high-strength waterproof resistance
Airtight and watertight padding is fired, signal linear sealing bucket washer (25) is Hastelloy material；Tapered packing (12) and dovetail washer (11) use
The conical surface to the sealing means of the conical surface, annulus packing (26) and annulus washer (27) equally using plane to the sealing means of plane,
Cone angle is 120 ° to tapered packing (12) up and down, and the tapered packing (12) of first be sitting on sealing station (4) has plane, dovetail pad
Circle (11) has flat surface and dove-tail form concave surface, machined hex nut shape at the top of signal linear sealing bucket (13) and thickened area processes
External screw thread, signal linear sealing bucket (13) and sealing station (4) are that air-tightness is threadedly coupled.
3. a kind of constant strain stress corrosion device of analog scene corrosive environment according to claim 1, feature exist
In: the curved arc specimen holder (20) and groove gasket (21) is polytetrafluoroethylene (PTFE) material, loads nut (17), fixture
Nut (18) and load screw rod (19) are process by Hastelloy, and test(ing) medium (6) is field working conditions condition simulation solution；
The radian of curved arc sample (16) is 200 °~300 °, and the circular arc vertex of curved arc sample (16) is adhesive with 3 or 5 data foil gauges
(23), it loads on screw rod (19) and is adhesive with 3 or 5 judgement foil gauges (22), curved arc specimen holder (20) is by clamp nut (18)
Being fixed on curved arc sample (16) both ends contacts curved arc sample (16) with sealing autoclave body (2), every time test sealing autoclave body (2)
3 or 5 curved arc samples (16) are provided with, it is close that foil gauge lead (15) collects entering signal line after connecting with outer defeated signal wire (24)
It seals bucket (13), outer defeated signal wire (24) passes through signal linear sealing bucket (13) access deformeter (1).
4. a kind of constant strain stress corrosion device using the analog scene corrosive environment as described in claim 1-3 carries out rotten
Lose the method for test, it is characterised in that the following steps are included:
Step 1, according to the live corrosive environment design experiment medium (6) of required simulation, curved arc sample (16) loaded load；
Step 2 prepares pasting data foil gauge (22) and determines foil gauge (23), by curved arc sample (16) and is added with fine sandpaper
It carries screw rod (19) patch location to polish, guarantees that curved arc sample on 1.6, is cleaned with acetone, then used by surface roughness
Alcohol washes, then curved arc specimen surface is dried up, guarantee to clean at patch；
Step 3, pasting data foil gauge (22) and judgement foil gauge (23) check foil gauge (22) and determine foil gauge (23)
Whether there is or not damages, then by data foil gauge (22) and determine that foil gauge (23) are attached to designated position with adhesive special, and when stickup needs
Certain pressure is applied to data foil gauge (22) and judgement foil gauge (23) respectively, extra binder is squeezed out；
Step 4, weld strain piece lead (15), respectively by the connecting terminal of data foil gauge (22) and judgement foil gauge (23)
It is sticked to data foil gauge (22) and determines foil gauge (23) nearby and respectively by data foil gauge (22) and judgement foil gauge (23)
Lead and connecting terminal with welding together；
Step 5 seals data foil gauge (22) up for safekeeping and determines foil gauge (23), respectively strains data foil gauge (22) and judgement
Piece (23) is sealed up for safekeeping agent and is sealed up for safekeeping with dedicated, and by data foil gauge (22) and determines foil gauge (23) number；
Step 6, loaded load, outer defeated signal wire (24) are connected on deformeter (1), use load nut (17) and load spiral shell
Curved arc specimen holder (20) is fixed on sample both ends by bar (19) loading stress, clamp nut (18), strains formula using data
(1) determine that required load strain is controlled data foil gauge (23) by deformeter (1) monitoring data foil gauge (23) registration
Registration is in ε1In ± 0.2% range, outer defeated signal wire (24) is disconnected with deformeter (1) after the completion of load；
In formula: σ1For the stress of curved arc sample setting load, MPa；E1For the elasticity modulus of curved arc sample material, MPa；ε1It is curved
The load strain of arc sample setting；
Step 7 successively (12) overlays tapered packing in sealing station, and dovetail washer (11) is pressed on tapered packing (12), close
Envelope platform (4) is sitting in sealing autoclave body (2), and fixing bolt (9) will seal kettle cover (3) and be fastened in sealing autoclave body (2)；
Step 8, fixed signal line are convergent on signal linear sealing after connecting foil gauge lead (15) and outer defeated signal wire (24)
In bucket (13), by signal linear sealing bucket (13) will outer defeated signal wire (24) extraction sealing station, successively by annulus packing (26) and
Annulus washer (27) is sitting at the step that sealing station (4) is connect with signal linear sealing bucket (13), by signal linear sealing bucket (13)
Nut top by signal linear sealing bucket precession sealing station and compress annulus washer (27) and annulus packing (26)；
Step 9 adds test(ing) medium (6), test(ing) medium (6) is added in corrosion test chamber (5), by air inlet (7), gas outlet
(8) it is respectively connected to H2S、CO2Or N2Gas cylinder and exhaust treatment system；
Step 10, the Ventiation Testing that heats up are passed through H after test(ing) medium (6) carries out abundant deoxygenation in corrosion test chamber (5)2S or CO2
Equal corrosive gas reach predetermined temperature to autoclave body temperature, and the record time starts to test；
Step 11 by deformeter (1) monitoring data foil gauge (23) and determines the strain variation of foil gauge (22), according to sentencing
Surely formula (2) are strained, acquires load screw rod strain value, and strain formula (3) according to terminating, acquires termination test strain value, if
Judgement foil gauge (22) data of deformeter (1) record are below termination test strain value, can stop testing, on the contrary then according to both
Determine test period to be tested；
In formula: ω is the width of curved arc sample, mm；T is the wall thickness of curved arc sample, mm；D is the outer diameter before the load of curved arc sample,
mm；A is the cross-sectional area for loading screw rod, mm2；E2For Hastelloy elasticity modulus, MPa；ε2For the strain for loading screw rod；
εter=(1- α) ε2 (3)
In formula: εterTo terminate strain, α is that the safety coefficient of test takes 3%~7%；
Step 12 by deformeter (1) record data foil gauge (23) and determines foil gauge (22) data after the test,
It is passed through N23 hours sufficiently removal H of gas2The corrosive gas such as S unload curved arc sample (16), and whether observation curved arc sample (16) breaks
Split and carry out crack detection, surface corrosion pattern and corrosion product analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910680130.7A CN110231218A (en) | 2019-07-26 | 2019-07-26 | The constant strain stress corrosion testing device and its test method of a kind of analog scene corrosive environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910680130.7A CN110231218A (en) | 2019-07-26 | 2019-07-26 | The constant strain stress corrosion testing device and its test method of a kind of analog scene corrosive environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110231218A true CN110231218A (en) | 2019-09-13 |
Family
ID=67855219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910680130.7A Pending CN110231218A (en) | 2019-07-26 | 2019-07-26 | The constant strain stress corrosion testing device and its test method of a kind of analog scene corrosive environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110231218A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715848A (en) * | 2019-10-30 | 2020-01-21 | 西南石油大学 | Stress erosion corrosion experimental apparatus |
| CN112268854A (en) * | 2020-10-29 | 2021-01-26 | 中国石油天然气集团有限公司 | Pipe corrosion resistance evaluation device, installation method and evaluation method in corrosive environment |
| CN112683712A (en) * | 2020-12-22 | 2021-04-20 | 西南石油大学 | Method for determining corrosion life of sucker rod |
| CN117368087A (en) * | 2023-11-09 | 2024-01-09 | 哈尔滨工业大学 | Corrosion and rust resistance-based metal test piece accelerated corrosion test method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881709A (en) * | 2010-06-23 | 2010-11-10 | 华东理工大学 | Novel stress corrosion test specimen and experiment method |
| CN102175139A (en) * | 2011-02-10 | 2011-09-07 | 中国矿业大学 | Strain gauge integration device under triaxial fluid ambient pressure |
| CN102692373A (en) * | 2012-06-14 | 2012-09-26 | 华东理工大学 | Stress corrosion sensitivity evaluation device based on small punch rod test technology |
| CN103926146A (en) * | 2014-04-11 | 2014-07-16 | 西南石油大学 | Constant-load stress corrosion testing device of small test sample and testing method thereof |
| CN204041987U (en) * | 2014-08-13 | 2014-12-24 | 中国石油天然气集团公司 | A kind of high pressure sealing pigtail splice |
| CN204447948U (en) * | 2015-02-11 | 2015-07-08 | 连云港职业技术学院 | A kind of minitype high voltage still being easy to open inner cap |
| CN104931372A (en) * | 2015-06-03 | 2015-09-23 | 中国石油大学(华东) | Experimental method for simulating stress corrosion of metal material under working conditions |
| CN108519321A (en) * | 2016-06-16 | 2018-09-11 | 天津大学 | Method for testing by using welding joint force-corrosion coupling testing device |
| CN109100217A (en) * | 2018-09-26 | 2018-12-28 | 中国石油天然气集团有限公司 | A kind of 4 points of curved test fixtures of anti-H 2 S stress corrosion |
| CN210513920U (en) * | 2019-07-26 | 2020-05-12 | 西南石油大学 | Constant strain stress corrosion test device capable of simulating field corrosion environment |
-
2019
- 2019-07-26 CN CN201910680130.7A patent/CN110231218A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881709A (en) * | 2010-06-23 | 2010-11-10 | 华东理工大学 | Novel stress corrosion test specimen and experiment method |
| CN102175139A (en) * | 2011-02-10 | 2011-09-07 | 中国矿业大学 | Strain gauge integration device under triaxial fluid ambient pressure |
| CN102692373A (en) * | 2012-06-14 | 2012-09-26 | 华东理工大学 | Stress corrosion sensitivity evaluation device based on small punch rod test technology |
| CN103926146A (en) * | 2014-04-11 | 2014-07-16 | 西南石油大学 | Constant-load stress corrosion testing device of small test sample and testing method thereof |
| CN204041987U (en) * | 2014-08-13 | 2014-12-24 | 中国石油天然气集团公司 | A kind of high pressure sealing pigtail splice |
| CN204447948U (en) * | 2015-02-11 | 2015-07-08 | 连云港职业技术学院 | A kind of minitype high voltage still being easy to open inner cap |
| CN104931372A (en) * | 2015-06-03 | 2015-09-23 | 中国石油大学(华东) | Experimental method for simulating stress corrosion of metal material under working conditions |
| CN108519321A (en) * | 2016-06-16 | 2018-09-11 | 天津大学 | Method for testing by using welding joint force-corrosion coupling testing device |
| CN109100217A (en) * | 2018-09-26 | 2018-12-28 | 中国石油天然气集团有限公司 | A kind of 4 points of curved test fixtures of anti-H 2 S stress corrosion |
| CN210513920U (en) * | 2019-07-26 | 2020-05-12 | 西南石油大学 | Constant strain stress corrosion test device capable of simulating field corrosion environment |
Non-Patent Citations (1)
| Title |
|---|
| 吕佳杰: "材料应力腐蚀测试装置研究及其在7055铝合金的应用", 《中国优秀硕士学位论文全文数据库 工程科技I辑》, no. 3, 15 March 2018 (2018-03-15), pages 1 - 89 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715848A (en) * | 2019-10-30 | 2020-01-21 | 西南石油大学 | Stress erosion corrosion experimental apparatus |
| CN112268854A (en) * | 2020-10-29 | 2021-01-26 | 中国石油天然气集团有限公司 | Pipe corrosion resistance evaluation device, installation method and evaluation method in corrosive environment |
| CN112683712A (en) * | 2020-12-22 | 2021-04-20 | 西南石油大学 | Method for determining corrosion life of sucker rod |
| CN112683712B (en) * | 2020-12-22 | 2022-01-28 | 西南石油大学 | Method for determining corrosion life of sucker rod |
| CN117368087A (en) * | 2023-11-09 | 2024-01-09 | 哈尔滨工业大学 | Corrosion and rust resistance-based metal test piece accelerated corrosion test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110231218A (en) | The constant strain stress corrosion testing device and its test method of a kind of analog scene corrosive environment | |
| CN210513920U (en) | Constant strain stress corrosion test device capable of simulating field corrosion environment | |
| CN103926146B (en) | A kind of small sample constant load stress corrosion test device and method of testing thereof | |
| CN105699286B (en) | A kind of moisture loop top part corrosion test device | |
| CN106442136B (en) | Device for testing stress corrosion behavior of metal material under high pressure of fluid | |
| CN102706750B (en) | High-temperature high-pressure constant load stress corrosion experiment method and device | |
| CN106501162B (en) | A kind of high temperature and pressure dynamic galvanic corrosion experimental method and device | |
| CN103293093B (en) | Deep-sea stress corrosion with ooze hydrogen experimental simulation device | |
| CN106442736B (en) | Testing device, testing system and testing method for uniaxial compression measurement of impact tendency index and acoustic characteristic of gas-containing coal | |
| CN103226091A (en) | High temperature high pressure acoustic emission electrochemistry simulation experiment apparatus capable of loading stress | |
| CN108982346B (en) | Test device and method for evaluating influence of surface state of steel pipe on cracking behavior | |
| CN114544461B (en) | Supercritical CO 2 Sealing and damage monitoring test system and method | |
| WO2021088238A1 (en) | Shpb test system-based dynamic lateral strain measurement device and method for test piece | |
| CN109596709B (en) | Detection method of fixed pressure container | |
| CN109001053A (en) | Coal petrography dynamic impulsion destroys test macro under a kind of confining pressure and damp and hot coupling condition | |
| CN103926479B (en) | coal gas migration process charge monitoring device and monitoring method thereof | |
| CN109613119A (en) | A kind of acoustic-electric seeps quasi- triaxial cell and the test method of comprehensive monitoring | |
| CN112268854A (en) | Pipe corrosion resistance evaluation device, installation method and evaluation method in corrosive environment | |
| CN107991014A (en) | A kind of torsional high strength threaded bolt jiont fastener shaft force checking device | |
| CN106018543B (en) | A kind of bolt connection part damage in-situ monitor device based on Metal magnetic memory | |
| CN203929593U (en) | A kind of high-temperature high-pressure apparatus material corrosion comprehensive study experiment table reactor | |
| JPH07167764A (en) | Device and method for monitoring cracking | |
| CN207937401U (en) | A kind of high pressure resistant coal petrography absorption damage deformation-acoustic-electric combined monitoring experimental rig | |
| CN110608945B (en) | Hydrostatic pressure damage detection device and method for full sea depth buoyancy material | |
| CN105973793B (en) | A kind of underground stress corrosion test method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |