CN110530786A - A kind of device of in-situ observation steel surface local corrosion germinating process - Google Patents
A kind of device of in-situ observation steel surface local corrosion germinating process Download PDFInfo
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- CN110530786A CN110530786A CN201910838522.1A CN201910838522A CN110530786A CN 110530786 A CN110530786 A CN 110530786A CN 201910838522 A CN201910838522 A CN 201910838522A CN 110530786 A CN110530786 A CN 110530786A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 47
- 230000007797 corrosion Effects 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 title claims abstract description 22
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 17
- 239000010959 steel Substances 0.000 title claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 230000002572 peristaltic effect Effects 0.000 claims description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 claims description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 239000010813 municipal solid waste Substances 0.000 abstract description 10
- 230000003628 erosive effect Effects 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 230000001939 inductive effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 17
- 238000004458 analytical method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000399 optical microscopy Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The present invention provides a kind of devices of in-situ observation steel surface local corrosion germinating process, belong to corrosion technology field.It is made of test stand, reaction vessel, solution wriggling loading system and high speed video system.Support frame (2) are housed on workbench (1), fix high-speed camera instrument (3) on support frame；Contain the threaded sample table (7) for being adjusted by rotation height, reaction vessel and loading system (13) connection for adding solution that can wriggle in reaction vessel (6).Advantage is that the variation of the heterogeneous microstructures such as field trash in material (precipitated phase) erosion profile during inducing local corrosion germinating can be observed in real time in situ, can be used to study the microstructures such as field trash or precipitated phase in different metal material and induce process and mechanism that local corrosion is germinated.Experimental rig is easy to operate, and data are accurate and reliable, can be widely applied in the corrosion research of different metal.
Description
Technical field
The invention belongs to corrosion technology field, designing material corrosion testing apparatus especially designs a kind of in-situ observation steel
The device of material surface local corrosion germinating process.
Background technique
It is also a kind of maximum corrosion type of harmfulness that local corrosion, which is most commonly seen in material corrosion,.In different materials
In as in low-alloy steel, stainless steel, magnesium alloy or aluminium alloy all can because of field trash or precipitated phase in steel appearance and cause
The germinating of the local corrosions such as spot corrosion.As the development of local corrosion will lead to perforation or the cracking of metal, and then to material can
It has an impact and threatens by property and safety.
Early period is germinated by the local corrosion that field trash in metal material or precipitated phase induce, erosion profile can occur acutely
Variation.The dissolution for corroding steel matrix or field trash (precipitated phase) in the development process of early period is successively different, can induce different
Electrochemical reaction, and then generate different erosion profile and mechanism.Though being studied at present about the partial mulching of material surface
It is so many, but few researchs are related to the erosion profile variation and mechanism at local corrosion germinating initial stage.This is largely
It is limited to the pattern in-situ observation device that initial stage is sprouted in observation corrosion.Sample after immersion is generally placed on light by traditional observation method
It learns and erosion profile is observed under microscope or electron microscope, or utilize corruption of the optical microscopy to specimen surface merely
Erosion process is observed.Both means can not evade in corrosion process or corrosion post-etching region surface rusty scale bring shadow
It rings, so can not be in the in-situ observation for truly accomplishing corrosion process.
Summary of the invention
The purpose of the invention patent is to provide a kind of device of in-situ observation steel surface local corrosion germinating process, solves
It the problem of initial stage progress in-situ observation can not be germinated in previous experimentation to local corrosion, realizes that a kind of structure is simple, operates
It is conveniently used for the device of in-situ observation steel surface local corrosion germinating process.
In order to achieve the goal above, the technical solution adopted by the present invention is that:
A kind of device of in-situ observation steel surface local corrosion germinating process, it is characterised in that: device is by workbench, branch
Support, high-speed camera instrument control line, high-speed camera instrument controller, reaction vessel, threaded is adjusted by rotation height at high-speed camera instrument
Spend sample table, sample, drainage hole, solution addition pipeline, peristaltic pump, solution conveyor tube road, solution storage tank and waste collection slot
Composition；The threaded rotatable sample table of fixed sample is provided in its reaction vessel；There is solution to wriggle outside reaction vessel to add
Injection system；High speed video system is installed on support frame above reaction vessel.
Further, the material of the reaction vessel is polymethyl methacrylate, comes with drainage hole, can will be extra molten
Container is discharged in liquid, stablizes liquid level；Reaction vessel interior has screw thread；Threaded rotatable hoistable platform is contained in inside,
Material is polymethyl methacrylate, and the height of sample in a reservoir can be adjusted by rotating sample, to guarantee face of taking temperature
The distance between liquid level of solution.
Further, the reaction vessel itself connects solution wriggling loading system, and the system is by solution addition pipeline, compacted
Dynamic pump, solution conveyor tube road and solution liquid holding tank composition；Peristaltic pump may be implemented self-timing or manually into reaction vessel
Solution is added, solution additive amount is controllable；The solution addition pipeline of equipment and the internal diameter of transfer pipeline are equal.
Further, the height and distance on the port test coupon surface of the solution addition pipeline is adjustable, to wash away
Specimen surface corrosion product.
Further, described that high number camera system square on the reaction vessel is set by high-speed camera instrument, high-speed camera instrument
Controller and high-speed camera instrument control line composition, wherein high-speed camera instrument is fixed on support frame, and camera focus, which should focus, to be tried
Sample surface.
Preferentially, the test stand is stainless steel composition.
It is being lured the invention has the advantages that can see in real time in situ and survey heterogeneous microstructures such as field trash (precipitated phases) in material
The variation of erosion profile during local corrosion is germinated is sent out, can be used to study field trash or precipitated phase etc. in different metal material
Microstructure induces the process and mechanism of local corrosion germinating.Experimental rig is easy to operate, and data are accurate and reliable, can be widely applied
In the corrosion research of different metal.
Detailed description of the invention
Fig. 1 is a kind of structural representation for in-situ observation steel surface local corrosion germinating process apparatus that the present invention designs
Figure.
Fig. 2 is sample used in the present invention.
Specific embodiment
In order to which what the objectives, technical solutions, and advantages of the present invention were explained is more clearly understood, below in conjunction with attached drawing and reality
Example is applied, the present invention is explained in further detail.It should be appreciated that specific implementation case described herein is only used for explaining this
Invention, is not limited to the present invention.
On the contrary, the present invention covers any substitution done on the essence and scope of the present invention being defined by the claims, repairs
Change, equivalent method and scheme.Further, in order to make the public have a better understanding the present invention, below to of the invention thin
It is detailed to describe some specific detail sections in section description.Part without these details for a person skilled in the art
The present invention can also be understood completely in description.
The present invention relates to a kind of devices for in-situ observation steel surface local corrosion germinating process, can be in material
The erosion profile at the local corrosions such as the spot corrosion induced by microstructures such as field trashes (precipitated phase) germinating initial stage and behavior carry out former
Position observation, the influence of corrosion product during corrosion can also be avoided to germinate.
As shown in Fig. 2, (being precipitated after first polishing sample before sample using field trash of the optical microscopy to specimen surface
Phase) position be marked, then the region other than observation area is pasted using adhesive tape, retain test zone, area
About 1mm2, or it is smaller.
It measures specimen height (h), sample table is rotated at reaction vessel highest liquid level (h+2~3) mm, by sample
It is fixed on sample table.
High-speed camera instrument is adjusted, by focus focusing at the field trash (precipitated phase) of institute observation area, to defocused, utilization is compacted
Solution is injected reaction vessel by dynamic pump, until solution can flood examination, and flow out from the drainage hole of reaction vessel, opens high speed
Video camera starts to start to record a video with 25 frames/second speed.
In video process, the speed for being generated and being accumulated according to corrosion product, the fluid injection frequency and reaction for adjusting peristaltic pump is held
The port of perfusion tube in device is at a distance from specimen surface, to wash away the corrosion product of specimen surface generation, produces to avoid corrosion
Interference of the object to video process.
After the test, video is exported, analysis field trash (precipitated phase) steel matrix or is mingled with during inducing local corrosion
The course of dissolution of object (precipitated phase), the mechanism germinated with analysis of material surface local corrosion.
Claims (5)
1. a kind of device of in-situ observation steel surface local corrosion germinating process, it is characterised in that: device by (1) workbench,
(2) support frame, (3) high-speed camera instrument, (4) high-speed camera instrument control line, (5) high-speed camera instrument controller, (6) reaction vessel,
(7) it is threaded be adjusted by rotation height sample table, (8) sample, (9) drainage hole, (10) solution addition pipeline, (11) peristaltic pump,
(12) solution conveyor tube road, (13) solution storage tank and (14) waste collection slot composition；Fixed examination is provided in its reaction vessel
The threaded rotatable sample table of sample；There is solution wriggling loading system outside reaction vessel；On support frame above reaction vessel
High speed video system is installed.
2. the device of in-situ observation steel surface local corrosion germinating process described in accordance with the claim 1, it is characterised in that: anti-
The material for answering container (6) is polymethyl methacrylate, comes with drainage hole (9), redundant solution can be discharged to container, stabilizing solution
Face height；Screw thread is had inside reaction vessel (6)；Threaded rotatable hoistable platform (7) is contained in inside, and material is poly- methyl
Methyl acrylate can adjust the height of sample in a reservoir by rotating sample, with guarantee to take temperature face and liquid level of solution it
Between distance.
3. the device of in-situ observation steel surface local corrosion germinating process described in accordance with the claim 1, it is characterised in that: anti-
Container itself is answered to connect solution wriggling loading system, which adds pipeline (10), peristaltic pump (11), solution conveyor tube by solution
Road (12) and solution liquid holding tank (13) composition；Peristaltic pump may be implemented self-timing or add manually into reaction vessel molten
Liquid, solution additive amount are controllable；Solution addition pipeline (10) of equipment and the internal diameter of transfer pipeline (12) are equal.
4. the device of in-situ observation steel surface local corrosion germinating process according to claim 3, it is characterised in that molten
The height and distance that liquid adds the port test coupon surface of pipeline (10) is adjustable, to wash away specimen surface corrosion product.
5. the device of in-situ observation steel surface local corrosion germinating process described in accordance with the claim 1, it is characterised in that: set
High number camera system square on the reaction vessel is set by high-speed camera instrument (3), high-speed camera instrument controller (5) and high-speed camera instrument
Control line (4) composition, wherein high-speed camera instrument is fixed on support frame, and camera focus should focus in specimen surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910838522.1A CN110530786A (en) | 2019-09-05 | 2019-09-05 | A kind of device of in-situ observation steel surface local corrosion germinating process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910838522.1A CN110530786A (en) | 2019-09-05 | 2019-09-05 | A kind of device of in-situ observation steel surface local corrosion germinating process |
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| Publication Number | Publication Date |
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| CN110530786A true CN110530786A (en) | 2019-12-03 |
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| CN201910838522.1A Pending CN110530786A (en) | 2019-09-05 | 2019-09-05 | A kind of device of in-situ observation steel surface local corrosion germinating process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289395A (en) * | 2020-02-24 | 2020-06-16 | 天津商业大学 | Metal stress corrosion image testing method |
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| CN105067464A (en) * | 2015-07-30 | 2015-11-18 | 长江大学 | Sand control pipe erosion rate experiment device |
| CN105784525A (en) * | 2016-03-17 | 2016-07-20 | 中国石油大学(北京) | Rotary multi-contact corrosive wear testing apparatus |
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