CN206192787U - Research sulfate reducing bacteria influences test device of law to metal stress corrosion cracking - Google Patents
Research sulfate reducing bacteria influences test device of law to metal stress corrosion cracking Download PDFInfo
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- CN206192787U CN206192787U CN201621137391.2U CN201621137391U CN206192787U CN 206192787 U CN206192787 U CN 206192787U CN 201621137391 U CN201621137391 U CN 201621137391U CN 206192787 U CN206192787 U CN 206192787U
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- test
- reducing bacteria
- stress corrosion
- test specimen
- sulfate reducing
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Abstract
The utility model provides a research sulfate reducing bacteria influences test device of law to metal stress corrosion cracking. Complete equipment comprises stress corrosion testing machine, electrochemistry workstation, nitrogen cylinder, thermostatted water bath and control system. Wherein the stress corrosion testing machine comprises power device, transmission, test piece anchor clamps, solution box, test piece surface detector to provide the interface for other devices. In the stress corrosion process of the test, through the nitrogen gas deoxidization, provide anaerobic environment for sulfate reducing bacteria. Power device and transmission apply specific stress through making crooked test piece further warp. Stress corrosion takes place for crooked test piece under applied stress and sulfate reducing bacteria etchant solution combined action. Through electrochemistry workstation real -time supervision corruption signal, regularly observe the surface crack forming core and the extension condition through the surperficial detector of test piece. The test conditions accuracy is controllable, and the installation of automated degree is high, provides the condition to metal stress corrosion cracking's influence for research sulfate reducing bacteria.
Description
Technical field
The utility model is related to a kind of metal stresses corrosion testing apparatus, more particularly to one kind can to study sulfate reduction
There is the experimental rig of the influence of stress corrosion cracking and action rule to metal in the vital movement of bacterium.
Background technology
It is a kind of extremely dangerous that metal and its alloy occur stress corrosion cracking under stress with corrosive environment collective effect
Material failure form.Stress corrosion cracking (SCC) expansion rate is higher by multiple orders of magnitude, metal structure compared with the corrosion rate of other forms
Part is often broken in the case of without any sign, causes huge potential safety hazard.Therefore research metal generation stress corrosion is opened
The rule and mechanism split are significant.Sulfate reducing bacteria is a kind of very common bacterium in surroundings, can be by
Into sulphion, existing numerous studies show sulfate reduction, and it has acceleration to metal spot corrosion, but on sulfate also
The experimental study of influence and the mechanism of action of the opportunistic pathogen to stress corrosion is little.
It is at present, known to be related to sulfate reducing bacteria and the test method of stress corrosion to have slow strain rate test,
Stress-electrochemical corrosion the test device for such as thanking to winged et al. utility model mutually ties stress corrosion with sulfate reducing bacteria corrosion
Close, but this slow strain rate test can not be observed specimen surface Crack Extension behavior in real time.At present also not
It was found that being related to the experimental rig that bend specimen is combined with sulfate reducing bacteria corrosion.Because being tested with bend specimen
It is difficult to ensure that the anaerobic environment needed for sulfate reducing bacteria in process of the test.According to standard GB/T 15970.3-1995 and GB/T
The U-shaped ring that 15970.5-1998 is recommended and C-shaped ring device, required stress are loaded by the bolt that material identical with sample is made,
Cause the extra consumption of test material.
Utility model content
Problem to be solved in the utility model is to overcome prior art not can be used to study sulfate reducing bacteria environment
The defect of the experimental rig of middle metal bending sample stress corrosion cracking affecting laws and mechanism, there is provided one kind is that guarantee is detested
Oxygen, isoperibol, can carry out the device of corrosion electrochemistry experiment and specimen surface observation again.
The utility model solves the technical scheme that its technical problem used：
Experimental rig, including the mechanical, electrical chem workstation of stress corrosion (cracking) test, nitrogen cylinder, constant temperature water bath and control system,
The stress corrosion (cracking) test machine is connected by gas port with nitrogen cylinder, and the stress corrosion (cracking) test machine passes through three electrode interfaces
It is connected with electrochemical workstation, the stress corrosion (cracking) test machine is connected by recirculated water interface with constant temperature water bath, described
Stress corrosion (cracking) test machine is connected by circuit with control system.
Described stress corrosion (cracking) test machine is symmetrical structure, and ac motor is arranged on the bottom of housing, worm screw support shaft
Hold and be fixed on shell with spring bearing, worm screw is vertically arranged with worm screw spring bearing, drive and worm screw, screw support axle
Hold, spring bearing surface is respectively provided with identical helicitic texture, each other by oil lubrication；Ac motor is by chain to biography
Driving wheel transmits power；Slide rail is connected with spring bearing and is arranged on the lower section of worm screw, and the bottom of sliding block is slidably arranged in slide rail,
The side of sliding block is connected with one end of worm screw, and the opposite side connection piece fixture of sliding block, specimen holder is described on piece fixture
The top of housing be provided with surface of test piece detector.
Described drive coaxial rigid connection handwheel.
Described piece fixture is made up of electrical insulating property material.
Described surface of test piece detector is made up of convex lens and lens barrel, and convex lens are moved up and down and are arranged in lens barrel, mirror
Cylinder is dismantled relative to housing and set.
Test specimen lifting wheel is provided between described sliding block and piece fixture, test specimen lifting wheel is a round metal dish type structure
Make, test specimen lifting wheel is embedded in inside sliding block, test specimen lifting wheel prolongs outside its central axis rotation, test specimen lifting wheel
A hinge eyes are stretched out, test specimen lifting wheel is hinged by hinge eyes with fixture, and piece fixture is perpendicular to test specimen lifting wheel
Two-dimensional rotary is done in plane.
Described test specimen lifting wheel is adjacent with worm screw inner side end, and when bending stress is applied to test specimen, they are mutual
It is independent, when needing for test specimen to take out observation surface corrosion pattern from solution in process of the test, worm screw and test specimen lifting wheel
It is of coupled connections by electromagnetic force, test specimen lifting wheel is rotated with the rotation of worm screw.
Water bath with thermostatic control box is provided with below described test specimen, water bath with thermostatic control box is the square box with hollow sandwich, it is permanent
Tepidarium box hollow sandwich is connected with constant temperature water bath, and solution box is placed on inside water bath with thermostatic control box.
The utility model has the advantages of as follows：
1st, whole stress corrosion (cracking) test secret envelope, and by nitrogen displacement inner air, detest for sulfate reducing bacteria is provided
Oxygen environment.
2nd, the internal structure of stress corrosion (cracking) test machine is reasonable so that stress loading, electro-chemical test in process of the test, sample
Surface observation can be carried out in the case of the closed anaerobic of testing machine interior room, it is ensured that the continuity of experiment.
3rd, power set are connected with control system and computer, by the revolution of specific software controlled motor, turn to and
Rotating speed, constant stress is applied by compressing bend specimen, and loading accuracy is high.In process of the test, can also be by specific program control
Motor processed is rotated by alternating direction, is that sample applies alternate stress, studies the corrosion fatigue behavior of sample.
4th, lift the electromagnetic force between rotating disk and worm screw by sample to be of coupled connections, realize sample by solution inside to convex
The transfer in lens inspection area.Sample loading stress and surface observation are by software control, high degree of automation.
Brief description of the drawings
Fig. 1 is the total connection diagram of the utility model.
Fig. 2 is the cut-away view of stress corrosion (cracking) test machine in the utility model.
Fig. 3 is the left view of stress corrosion (cracking) test machine internal structure in the utility model.
In figure：1st, computer；2nd, control system；3rd, electrochemical workstation；4th, auxiliary electrode interface；5th, reference electrode connects
Mouthful；6th, working electrode interface；7th, stress corrosion (cracking) test machine；8th, constant temperature water bath；9th, nitrogen cylinder；10th, shell；11st, AC electrical
Machine；12nd, chain；13rd, handwheel；14th, drive；15th, worm screw；16th, worm screw spring bearing；17th, lens barrel；18th, eyeglass；19th, eyeglass
Fixing screws；20th, nitrogen inlet pipeline；21st, thermostatted water entrance pipe；22nd, support；23rd, plug；24th, constant temperature water outlet line；
25th, air-outlet aperture；26th, pad；27th, spring bearing；28th, sliding block；29th, piece fixture；30th, test specimen lifting wheel；31st, try
Part；32nd, slide rail；33rd, gate is tested；34th, auxiliary electrode；35th, reference electrode；36th, working electrode wire；37th, testing liquid；
38th, solution box；39th, water bath with thermostatic control box.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the utility model patent.
Embodiment
As Figure 1-3, control system 2 is connected with the dynamical system of stress corrosion (cracking) test machine 7 by circuit, by computer
1 controls the rotating speed of ac motor, turns to and revolution, and control system is made up of Programmable Logic Controller with host computer.Electrochemistry work
Auxiliary electrode interface 4, reference electrode interface 5, the working electrode interface 6 for making station 3 are auxiliary with what stress corrosion (cracking) test machine 7 was provided respectively
Three interfaces of electrode 34, reference electrode 35, working electrode 36 are helped to connect, the electrochemical parameter for testing in corrosion process becomes
Change.Thermostatted water entrance pipe 21, constant temperature water outlet line 24 that constant temperature water bath 8 is provided with stress corrosion (cracking) test machine 7 respectively
Logical, before experiment and in process of the test, the water circulation for being heated to specified temp flows through water bath with thermostatic control box 39, and solution box is made by heat transfer
Testing liquid in 38 keeps constant temperature.On the one hand, this temperature is set in the range of suitable Growth of Sulfate Reducing Bacteria, can
The activity of sulfate reducing bacteria during guarantee test；On the other hand, temperature changes within the specific limits, can carry out relevant temperature
Spend the experiment on the influence of stress corrosion behavior.Nitrogen cylinder 9 is by nitrogen inlet pipeline 20 for the interior room of stress corrosion (cracking) test machine 7 is carried
For nitrogen.Nitrogen is less than atmospheric density because of density, the upper space in testing machine is gathered in during beginning, as nitrogen does not stop
Enter, air is driven by nitrogen and flowed downward, constantly flowed out from air-outlet aperture 25.On-test, opens nitrogen for the previous period
Bottle valve, nitrogen is filled with to experimental enviroment, and plug 23 is filled in air-outlet aperture 25, completely cuts off air by logical nitrogen after terminating.
As shown in Fig. 2 described stress corrosion (cracking) test machine is symmetrical structure, ac motor is arranged on the bottom of housing,
Ac motor 11 receives control system instruction, and certain revolution is rotated according to specific direction, rotating speed.Ac motor 11 leads to
Cross chain 12 and transmit power to drive 14.Worm screw spring bearing 16 and spring bearing 27 are fixed on shell 10, worm screw 15 with
Worm screw spring bearing 16 is vertically arranged, and drive 14 is respectively provided with phase with worm screw 15, screw support bearings 16, the surface of spring bearing 27
Same helicitic texture, each other by oil lubrication.Worm screw 15 is driven to rotate when drive 14 is rotated, because of worm screw spring bearing 16
It is each attached on shell 10 with spring bearing 27, therefore worm screw 15 can also move in the horizontal direction while rotation.Slide rail with
Spring bearing is connected and is arranged on the lower section of worm screw, and the bottom of sliding block is slidably arranged in slide rail, side and the worm screw of sliding block
One end is connected, the opposite side connection piece fixture 29 of sliding block, and on piece fixture 29, sliding block 28 can be in slide rail 32 for specimen holder
Upper level is slided, and power is provided for it by worm screw 15.The mobile drive piece fixture 29 of sliding block 28 is moved, and then causes originally curved
Bent test specimen further bends, and has corresponding relation, motor rotation circle between the deflection of bending specimen and its stress state
Number, drive rotate the number of turns, worm screw（Or sliding block, piece fixture）Horizontal displacement, sample deformation amount and sample point stresses size
Between have determine corresponding relation, therefore by the revolution for being input into motor by sample apply particular size it is additional answering
Power.Motor can also be set by both forward and reverse directions alternate rotation as sample applies alternate stress, now the rotating speed of motor is determined
Determine the frequency of alternate stress, revolution determines alternating stress amplitude.Handwheel 13 is connected with the coaxial rigid of drive 14, is powering off or is moving
More can manually be adjusted during power equipment fault.The dynamical system of device, transmission system are symmetrical, can be by control
System realizes Synchronization Control.
As shown in Figure 2,3, test specimen lifting wheel 30 is round metal dish type construction, is embedded in inside sliding block 28, can be around
A hinge eyes are extended in central shaft rotation, outside, can be hinged with fixture.After being hinged, piece fixture can be lifted with test specimen
Two-dimensional rotary is done in the vertical plane in runner outer surface.Test specimen lifting wheel 30 is adjacent with the inner side end of worm screw 15, and spacer
From smaller, when bending stress is applied to test specimen, they are separate.When needing that test specimen is taken out from solution in process of the test
During observation surface corrosion pattern, by electromagnetic force them can be made coupled to each other, at this moment test specimen lifting wheel can be with worm screw 15
Rotate and rotate, when worm screw 15 rotates half cycle, test specimen is to turn to the lower section of convex lens 18 by solution, by eyeglass fixing screws
19 upper-lower positions that can adjust convex lens, make sample bending section（At maximum stress）It is placed within the focal length of lens, amplifies
Sample observes surface corrosion pattern to facilitate.Device and light microscope can also be coordinated, test specimen table is seen in more detail
Face.
Two ac motors constitute power set, and motor speed, steering are by control system control.
Described drive, worm screw, sliding block all parts transfer power to test specimen by closely linking.Outside drive
Catcher wheel, when power-off or dynamical system are broken down, can realize manual loading.
Described piece fixture is made up of electrical insulating property material, such as PE plastics, it is to avoid test specimen occurs galvanic corrosion.
Described surface of test piece detector is made up of convex lens and lens barrel, and lens barrel is detachable relative to shell.Convex lens phase
Can be moved up and down for lens barrel, so that test specimen observation station is within focal length of convex lens.
Described nitrogen cylinder is input into nitrogen by the gas access of stress corrosion (cracking) test machine shell upper, because density of nitrogen is small
In air, air accumulation is above inner chamber space.Outer casing underpart has air outlet, empty as nitrogen input quantity is continuously increased
Gas is progressively discharged, and now closes air outlet, you can form the oxygen-free environment for being adapted to Growth of Sulfate Reducing Bacteria.
Water bath with thermostatic control box is provided with below described test specimen, water bath with thermostatic control box is square box, with hollow sandwich.Constant temperature
Water bath is connected with the water bath with thermostatic control box of interior room, and thermostatted water is cycled through into hollow sandwich.Solution box is placed on water bath with thermostatic control box
Inside, by heat transfer, makes testing liquid that constant temperature is kept in process of the test.
Above with respect to specific descriptions of the present utility model, it is merely to illustrate the utility model and is not limited to this practicality newly
Technical scheme described by type embodiment.It will be understood by those within the art that, still the utility model can be entered
Row modification or equivalent, to reach identical technique effect.As long as satisfaction uses needs, all in protection model of the present utility model
In enclosing.
Claims (8)
1. a kind of sulfate reducing bacteria of studying is to the experimental rig of metal stresses corrosion cracking affecting laws, it is characterised in that including
The mechanical, electrical chem workstation of stress corrosion (cracking) test, nitrogen cylinder, constant temperature water bath and control system, the stress corrosion (cracking) test machine lead to
Cross gas port to be connected with nitrogen cylinder, the stress corrosion (cracking) test machine is connected by three electrode interfaces with electrochemical workstation
Connect, the stress corrosion (cracking) test machine is connected by recirculated water interface with constant temperature water bath, the stress corrosion (cracking) test machine passes through
Circuit is connected with control system.
2. a kind of experiment for studying sulfate reducing bacteria to metal stresses corrosion cracking affecting laws according to claim 1
Device, it is characterised in that：Described stress corrosion (cracking) test machine is symmetrical structure, and ac motor is arranged on the bottom of housing, snail
Bar spring bearing and spring bearing are fixed on shell, and worm screw is vertically arranged with worm screw spring bearing, drive and worm screw, screw rod
Spring bearing, spring bearing surface are respectively provided with identical helicitic texture, each other by oil lubrication；Ac motor passes through chain
Bar transmits power to drive；Slide rail is connected with spring bearing and is arranged on the lower section of worm screw, and the bottom of sliding block is slidably arranged in
In slide rail, the side of sliding block is connected with one end of worm screw, the opposite side connection piece fixture of sliding block, and specimen holder is in piece fixture
On, the top of described housing is provided with surface of test piece detector.
3. a kind of experiment for studying sulfate reducing bacteria to metal stresses corrosion cracking affecting laws according to claim 2
Device, it is characterised in that：Drive coaxial rigid connects handwheel.
4. a kind of experiment for studying sulfate reducing bacteria to metal stresses corrosion cracking affecting laws according to claim 2
Device, it is characterised in that：Described piece fixture is made up of electrical insulating property material.
5. a kind of experiment for studying sulfate reducing bacteria to metal stresses corrosion cracking affecting laws according to claim 2
Device, it is characterised in that：Described surface of test piece detector is made up of convex lens and lens barrel, and convex lens are moved up and down and are arranged on mirror
In cylinder, lens barrel is dismantled relative to housing and set.
6. a kind of experiment for studying sulfate reducing bacteria to metal stresses corrosion cracking affecting laws according to claim 2
Device, it is characterised in that：Test specimen lifting wheel is provided between sliding block and piece fixture, test specimen lifting wheel is a round metal dish type
Construction, test specimen lifting wheel is embedded in inside sliding block, and test specimen lifting wheel is outside its central axis rotation, test specimen lifting wheel
Extend a hinge eyes, test specimen lifting wheel is hinged by hinge eyes with fixture, and piece fixture is perpendicular to test specimen lifting wheel
Plane in do two-dimensional rotary.
7. a kind of experiment for studying sulfate reducing bacteria to metal stresses corrosion cracking affecting laws according to claim 2
Device, it is characterised in that：Test specimen lifting wheel is adjacent with worm screw inner side end, when bending stress is applied to test specimen, their phases
Mutually independent, when needing for test specimen to take out observation surface corrosion pattern from solution in process of the test, worm screw turns with test specimen lifting
Wheel is of coupled connections by electromagnetic force, and test specimen lifting wheel is rotated with the rotation of worm screw.
8. a kind of experiment for studying sulfate reducing bacteria to metal stresses corrosion cracking affecting laws according to claim 2
Device, it is characterised in that：Water bath with thermostatic control box is provided with below described test specimen, water bath with thermostatic control box is with the square of hollow sandwich
Box, water bath with thermostatic control box hollow sandwich is connected with constant temperature water bath, and solution box is placed on inside water bath with thermostatic control box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621137391.2U CN206192787U (en) | 2016-10-19 | 2016-10-19 | Research sulfate reducing bacteria influences test device of law to metal stress corrosion cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621137391.2U CN206192787U (en) | 2016-10-19 | 2016-10-19 | Research sulfate reducing bacteria influences test device of law to metal stress corrosion cracking |
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| Publication Number | Publication Date |
|---|---|
| CN206192787U true CN206192787U (en) | 2017-05-24 |
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ID=58731671
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621137391.2U Expired - Fee Related CN206192787U (en) | 2016-10-19 | 2016-10-19 | Research sulfate reducing bacteria influences test device of law to metal stress corrosion cracking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404554A (en) * | 2016-10-19 | 2017-02-15 | 辽宁石油化工大学 | Test apparatus for research on laws of influence of sulfate reducing bacteria on stress corrosion cracking of metal |
| CN111747505A (en) * | 2020-06-19 | 2020-10-09 | 轻工业环境保护研究所 | Embedded sulfate corrosion monitoring and self-repairing multifunctional micro-balloon |
-
2016
- 2016-10-19 CN CN201621137391.2U patent/CN206192787U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404554A (en) * | 2016-10-19 | 2017-02-15 | 辽宁石油化工大学 | Test apparatus for research on laws of influence of sulfate reducing bacteria on stress corrosion cracking of metal |
| CN106404554B (en) * | 2016-10-19 | 2023-08-22 | 辽宁石油化工大学 | Test device for researching influence rule of sulfate reducing bacteria on metal stress corrosion cracking |
| CN111747505A (en) * | 2020-06-19 | 2020-10-09 | 轻工业环境保护研究所 | Embedded sulfate corrosion monitoring and self-repairing multifunctional micro-balloon |
| CN111747505B (en) * | 2020-06-19 | 2022-03-11 | 轻工业环境保护研究所 | Embedded sulfate corrosion monitoring and self-repairing multifunctional micro-balloon |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170524 Termination date: 20171019 |
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| CF01 | Termination of patent right due to non-payment of annual fee |