CN209387483U - The experimental rig of alternation of wetting and drying accelerated corrosion is carried out under high voltage electric field environment - Google Patents
The experimental rig of alternation of wetting and drying accelerated corrosion is carried out under high voltage electric field environment Download PDFInfo
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- CN209387483U CN209387483U CN201822093115.6U CN201822093115U CN209387483U CN 209387483 U CN209387483 U CN 209387483U CN 201822093115 U CN201822093115 U CN 201822093115U CN 209387483 U CN209387483 U CN 209387483U
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Abstract
The utility model proposes the experimental rigs that alternation of wetting and drying accelerated corrosion is carried out under a kind of high voltage electric field environment characterized by comprising the high voltage electric field generator being made of geomery identical discoid top crown and bottom crown；The disk of the top crown and bottom crown edge is above each provided with a grading ring；The top crown and bottom crown are tried to get to the heart of a matter parallel and are oppositely arranged；The top crown is supported and fixed on above bottom crown by more adjustable-lengths or removable polyethylene column；The top crown connects high pressure generator, bottom crown ground connection by protective resistance.It is simple to manufacture, is low in cost, takes full advantage of the ordinary elements that can be touched in power test, realizes purpose of design and has superior performance, provides uniform field distribution and suitable test platform.Process is realized in the test for providing alternation of wetting and drying accelerated corrosion simultaneously, is capable of the corrosion process of the coastal rainy environment of humidity of abundant simulation.
Description
Technical field
The utility model relates to alternation of wetting and drying acceleration is carried out under power test field more particularly to a kind of high voltage electric field environment
The experimental rig of corrosion.
Background technique
Last 100 years continue for for the research of corrosion, the method corroded is also various.In March, 2016
Global Investigation On Corrosion report display, world's average corrosion economic loss account for 3.4% or so of global gross national product (GDP).It is logical
Corrosion can be greatly reduced to economic loss by crossing the research to corrosion mechanism, corrosion behavior and targetedly protecting.
In coastal industry region, the high voltage power transmission process of electric system usually faces corrosion puzzlement, on the one hand crucial conductor
Material had both been in moist rainy environment, while being also in strong electric field environment.In rainy environment, due to coastal region precipitation
Salinity is higher, so corrosion when conductor material is covered by rainwater is to belong to a kind of immersion corrosion in seawater.When in wet environment
When, material surface is covered by thin liquid film, and the corrosion of material belongs to atmospheric corrosion.Corrosion mechanism is different under different models.And high pressure
Conductor material in electric system is in strong alternating electric field, alternating electric field to corrosive ion move, corrosion potential and
Corrosion current has a major impact.
The method for usually carrying out corrosion behavior research has accelerated test in atmospheric exposure test method and reality.
The advantages of atmospheric exposure test is most-often used method, the method is the practical feelings that can prepare reaction scene
Condition, data are accurately highly reliable.The disadvantage is that the test period is longer, test result is that many factors are coefficient as a result, not
Analysis discussion can be carried out to single factors.
Indoor accelerated test is the important research means of corrosion research, and indoor accelerated method main at present has: salt fog
Test, damp heat test, period are sprayed composite corrosion test, the leaching cyclic test of dry and wet week and multiple-factor and recycle compound corrosion examination
It tests.
Utility model content
In order to solve problem and shortage of the existing technology, the utility model provides one kind under high voltage electric field environment
The device and method for carrying out immersion corrosion and atmospheric corrosion.It is made of a set of easy simple device, in the corrosion test
The immersion corrosion model that corrosive liquid, which need to only be added dropwise, can be realized under high voltage electric field environment is carried out with atmospheric corrosion model alternation of wetting and drying
Test process.The utility model specifically uses following technical scheme:
The utility model specifically uses following technical scheme:
The experimental rig of alternation of wetting and drying accelerated corrosion is carried out under a kind of high voltage electric field environment characterized by comprising by shape
The high voltage electric field generator that the identical discoid top crown of shape size and bottom crown are constituted；The disk of the top crown and bottom crown
A grading ring is each provided on edge；The top crown and bottom crown are tried to get to the heart of a matter parallel and are oppositely arranged；The top crown passes through
More adjustable-lengths or removable polyethylene column are supported and fixed on above bottom crown；The top crown is connected by protective resistance
High pressure generator, bottom crown ground connection.
Preferably, the two sides up and down of the top crown and bottom crown are respectively arranged with the screw hole with screw and nut.
Preferably, the material of the top crown and bottom crown is stainless steel；The grading ring is surface by copper foil or tinfoil paper
The ring tube of covering.
Preferably, the diameter of the top crown and bottom crown is 30cm-50cm；The diameter of the grading ring is 3cm-8cm.
Preferably, the high voltage electric field generator setting is in corrosion case；The corrosion case includes: to be made of acrylic board
External frame, be horizontally set in the external frame mesh-supported plate, be arranged in it is molten below the mesh-supported plate
Liquid bath, the thermostat heating cushion being arranged in below the solution tank and the airflow fan being arranged on mesh-supported plate；Under described
Pole plate is arranged on mesh-supported plate.
The device design scheme that the utility model and its preferred embodiment provide is simple to manufacture, is low in cost, takes full advantage of
The ordinary elements that can be touched in power test realize purpose of design and have superior performance, provide uniform
Field distribution and suitable test platform.The present embodiment device produces sufficiently uniform electricity between top crown and bottom crown
, and electric field strength can be adjusted flexibly by the spacing of control top crown and bottom crown；The chassis of bottom crown is flat as test
Platform provides sufficiently wide operating space, can be easy to carry out various test operations.
The accurate control corrosion rate liquid thickness of corrosive liquid is added dropwise using liquid-transfering gun, insulating cement sealing sample control corrosion rate region carries out
Local corrosion, grading ring improve upper bottom crown surrounding electric field environment, avoid point discharge, have good operability and safety
Property.Method provided by the utility model had both considered immersion corrosion model, also contained atmospheric corrosion model, while providing dry
Process is realized in the test of wet alternate accelerated corrosion, can sufficiently simulation in the coastal rainy environment of humidity, outdoor metal erosion
Usual existing immersion corrosion model, also includes the environment of atmospheric corrosion model, and local corrosion, sample may be implemented in the method
It is not influenced by shape.
Detailed description of the invention
With reference to the accompanying drawings and detailed description to the further details of explanation of the utility model:
Fig. 1 is the utility model embodiment overall structure stereoscopic schematic diagram；
Fig. 2 is the utility model embodiment overall structure schematic side view (setting is in corrosion case)；
Fig. 3 is corrosive liquid thickness change schematic diagram during the utility model embodiment aluminum alloy surface 12 hours；
A, b, c, which are illustrated respectively in, in Fig. 4 corrodes sweeping for 7 circulations under the electric field of 0KV/m, 200KV/m and 400KV/m
Retouch Electronic Speculum shooting result figure；
Fig. 5 is that the utility model embodiment corrodes the stress strain curve signal after 7 cycle periods under different electric field strengths
Figure；
In figure: 1- top crown；2- bottom crown；3- grading ring；4- polyethylene column；5- conducting wire；10- external frame；11- air-flow
Fan；12- mesh-supported plate；13- solution tank；14- thermostat heating cushion；21- corrodes sample.
Specific embodiment
For the feature and advantage of this patent can be clearer and more comprehensible, special embodiment below, and cooperate attached drawing, make specifically
It is bright as follows:
As shown in Figure 1 and Figure 2, the core component of the present embodiment device includes: by the identical discoid upper pole of geomery
The high voltage electric field generator that plate 1 and bottom crown 2 are constituted.
Wherein, the disk of top crown 1 and bottom crown 2 is along being above each provided with a grading ring 3, top crown 1 and bottom crown 2 it is straight
Diameter is 30cm-50cm；The diameter of grading ring 3 is 3cm-8cm.The material of top crown 1 and bottom crown 2 is stainless steel；Grading ring 3 is
The ring tube that surface is covered by copper foil or tinfoil paper, makes every bit equipotentiality point on round tube ring.Grading ring 3 is to eliminate stainless steel circle
Disk edge electrion phenomenon.
Top crown 1 and bottom crown 2 are tried to get to the heart of a matter parallel and are oppositely arranged；Top crown 1 is by more (the present embodiment selects three)
Insulating materials polyethylene column 4 supports, and polyethylene column 4 is fixed on 2 surface of bottom crown, and one kind of the polyethylene column 4 is selected as length
Adjustable, the conventional arrangement mode that can be used is provided with the structure of screw shaped for the both ends of polyethylene column 4, and cooperates top crown
1 and the trying to get to the heart of a matter of bottom crown 2 on correspondence screw hole, the mode being connected through a screw thread adjusts the length of its support section, can also be accurate
Ground levels top crown 1.The another kind of polyethylene column 4 is selected as detachable and installation structure, can also be using poly-
The both ends of ethylene column 4 are provided with the structure of screw shaped, and cooperate the side of the correspondence screw hole on the trying to get to the heart of a matter of top crown 1 and bottom crown 2
Case, and there are many polyethylene columns 4 of different regular lengths to be replaced according to actual needs for outfit, so as to adjust top crown
The distance between 1 and bottom crown 2.
The two sides up and down of top crown 1 and bottom crown 2 are respectively arranged with the screw hole with screw and nut.It will by screw and nut
Conducting wire 5 is connected on the inside or outside of disk.Top crown 1 is connected to high pressure generator by protective resistance of connecting, and bottom crown 2 is grounded.
High voltage electric field is formed by upper bottom crown.Adjust the adjustable electric field strength of height of high pressure size and polyethylene support column.
Conducting wire 5 preferentially uses heavy gauge wire, and can be enclosed with grading ring also outside to avoid point discharge to guarantee safety.Protection electricity
Resistance can use high value water resistance, and solution is deionized water in resistance.Resistance value is about 80K Ω.Protective resistance is connected with conducting wire 5
Grading ring has also can be set in the both ends connect, improves safety.
When corroding the preparation of sample 21, by insulating cement (such as AB glue) by corrosion sample edge seal, and sealant is higher by corruption
21 surface 2-3mm of sample is lost, and is placed on the upper surface of bottom crown 2, in corrosion process, corrosive liquid is added dropwise using liquid-transfering gun and exists
Corrosion area, by corroding the top surface area of sample and the amount of corrosive liquid come the thickness of control corrosion rate liquid.Before abrasion cycle
The section time, when corrosive liquid thickness is higher, corrosion process is immersion corrosion model, and when corrosive liquid is thin liquid film, erosion model is
Atmospheric corrosion model.Period end is dry environmental phase.It realizes by immersion corrosion to the corrosion side of atmospheric corrosion alternation of wetting and drying
Method, in the rainy environment of coastal humidity, the method is more close to truth.And sample is not influenced by shape.
Corrosive environment can be provided by the corrosion case of acrylic glass manufacture.Corrode in case by thermostat heating cushion 14, small wind
Fan and Glycerine-Aqueous Solution carry out the factors such as the temperature of Regulate Environment, air stream passband and humidity.
Corrosion case scheme provided in this embodiment includes: the external frame 10 being made of acrylic board, is horizontally disposed with outside
Mesh-supported plate 12 in portion's frame 10, is arranged below solution tank 13 solution tank 13 being arranged in below mesh-supported plate 12
Thermostat heating cushion 14 and the airflow fan 11 that is arranged on mesh-supported plate 12；Bottom crown 2 is arranged in mesh-supported plate 12
On.Glycerine-Aqueous Solution is injected in solution tank 13.
During constructing test, it is different that it can also be provided with spacing between two groups of top crowns 1 and bottom crown 2 simultaneously
High voltage electric field generator, two top crowns 1 connect and connect high pressure generator, to obtain identical high input voltage, and make pole
The spacing difference of plate 1 and bottom crown 2 is to obtain different Potential Distributings, and control group, can carry out corresponding check experiment each other.
Thus the basic test method constructed can be summarized as following steps:
Step S1: preparation corrosion sample 21 will corrode the edge seal of sample 21 by insulating cement, insulating cement is higher by corrosion
The upper surface 2-3mm of sample 21；
Step S2: sample 21 will be corroded and be placed on the trying to get to the heart of a matter of bottom crown 2；
Step S3: corrosive liquid is added dropwise using liquid-transfering gun and is corroding 21 upper surface of sample, and the thickness of control corrosion rate liquid；
Step S4: high voltage electric field generator being put into corrosion case, and is powered to top crown 1, observation corrosion sample 21
Corrosion condition.
Wherein, by adjusting the output voltage of high voltage electric field generator and the spacing of top crown 1 and bottom crown 2, control
The intensity of electric field；Relative humidity is adjusted by glycerol relative amount in Glycerine-Aqueous Solution；By the revolving speed for adjusting airflow fan 11
Control airflow rate；Temperature is controlled by thermostat heating cushion 14 and keeps constant temperature.
Particularly, when executing step S4,
The state when thickness of corrosive liquid is greater than threshold value is defined as the immersion corrosion stage；
The state of thin liquid film when the thickness of corrosive liquid is less than threshold value is defined as the atmospheric corrosion stage；
State when by corrosive liquid with a thickness of zero is defined as dry environmental phase；
With the immersion corrosion stage to atmospheric corrosion stage again to dry environmental phase for an abrasion cycle, when one corruption of experience
After losing the period, step S3 and step S4 is executed again, and when thickness of control corrosion rate liquid starts with previous abrasion cycle is consistent,
N number of abrasion cycle is repeated altogether.
Device and method through this embodiment, the case where specifically being tested, are as follows:
Example 1: 5052 line aluminium alloy plates are used, 20mm × 20mm × 2mm sample is made in aluminum alloy specimen, uses water
Dry sanding paper polishes smooth specimen surface from 1500 mesh to 4000 mesh step by step, and is polished.And ultrasound is clear in deionized water
It washes 5 minutes, then is rinsed with ethyl alcohol.Etc. sealing sample surrounding with AB glue after to be dried, and AB glue is higher by aluminium alloy upper surface
0.2-0.3mm high.After waiting AB glue to be fully cured, in being put into high voltage electric field, 400 μ L3.5w% sodium chloride are added dropwise with liquid-transfering gun
Solution makes corrosive liquid with a thickness of 1000 microns in corrosion area.It is placed on 35 DEG C, in the corrosion case of 75% humidity.Pass through title
The thickness of weight method measurement corrosive liquid, Fig. 3 is corrosive liquid thickness change in 12 hours corrosion processes.Preceding 5 hours are immersion corrosion
Model, it is dry environment later that intermediate four hours, which are atmospheric corrosion model,.Immersion corrosion model and atmosphere are realized by the method
The alternation of wetting and drying accelerated corrosion of erosion model together.
Example 2: 5052 line aluminium alloy plates are used, 20mm × 20mm × 2mm sample is made in aluminum alloy specimen, uses water
Dry sanding paper polishes smooth specimen surface from 1500 mesh to 4000 mesh step by step, and is polished.And ultrasound is clear in deionized water
It washes 5 minutes, then is rinsed with ethyl alcohol.Etc. sealing sample surrounding with AB glue after to be dried, and AB glue is higher by aluminium alloy upper surface
0.2-0.3mm high.AB glue is waited to be fully cured, high voltage electric field is supported using 40mm and 80mm polyethylene insulation column, and high pressure occurs
Device is adjusted to 16KV, makes electric field strength 200KV/m and 400KV/m, aluminum alloy specimen is placed on bottom crown 2, liquid-transfering gun is used
400 μ L3.5w% sodium chloride solutions are added dropwise, make corrosive liquid with a thickness of 1000 microns.It is placed on the environment of 35 DEG C, 75% humidity
In.24 hours are 1 circulation, and Fig. 4 is to corrode table after 7 circulations under the electric field environment of 0KV/m, 200KV/m and 400KV/m
The SEM(scanning electron microscope in face) pattern, therefrom it can be found that after corroding 7 cycle periods under 0KV/m electric field strength, aluminium alloy table
Polygon is presented in face, and has partial exfoliation.After corroding 7 cycle periods under 200KV/m electric field, aluminum alloy surface shows more
Tiny polygon is equally to have partial exfoliation.Under 400KV/m electric field corrode 7 periods after, aluminium alloy polygon surface layer with
It all falls off, becomes substandard rugged shape.
Example 3: 5052 line aluminium alloy standard samples are used, specimen size establishing criteria GB/T228.1-2010 is processed into mute
Bell type tensile sample.The corrosion region surrounding of sample is sealed with AB glue, and AB glue is higher by aluminium alloy upper surface 0.2-0.3mm high.
AB glue is waited to be fully cured, high voltage electric field is supported using 40mm and 80mm polyethylene insulation column, and high pressure generator is adjusted to 16KV,
Make electric field strength 200KV/m and 400KV/m, aluminum alloy specimen is placed on bottom crown 2,400 μ L3.5w% are added dropwise with liquid-transfering gun
Sodium chloride solution makes corrosive liquid with a thickness of 1000 microns.It is placed on 35 DEG C, in the environment of 75% humidity.24 hours are 1
It recycles, tests tensile property using Mei Tesi industrial system CMT5504 electronic universal tester after 4 circulations.F- deformation curve
As shown in figure 5, wherein finding that tensile strength is significantly lower than the tension corroded under 200KV/m after corroding under 400KV/m electric field
Intensity, and all lower than the tensile strength corroded under no electric field.Furthermore expansion and contraction is successively 400KV/m < from small to large
200KV/m < 0KV/m.
This patent is not limited to above-mentioned preferred forms, anyone can obtain other each under the enlightenment of this patent
The experimental rig of alternation of wetting and drying accelerated corrosion is carried out under the high voltage electric field environment of kind form, it is all according to present utility model application patent model
Done equivalent changes and modifications are enclosed, the covering scope of this patent should be all belonged to.
Claims (5)
1. carrying out the experimental rig of alternation of wetting and drying accelerated corrosion under a kind of high voltage electric field environment characterized by comprising by shape
The high voltage electric field generator that the identical discoid top crown of size and bottom crown are constituted；The disk edge of the top crown and bottom crown
On be each provided with a grading ring；The top crown and bottom crown are tried to get to the heart of a matter parallel and are oppositely arranged；The top crown passes through more
Root adjustable-length or removable polyethylene column are supported and fixed on above bottom crown；The top crown is connected high by protective resistance
Press generator, bottom crown ground connection.
2. carrying out the experimental rig of alternation of wetting and drying accelerated corrosion, feature under high voltage electric field environment according to claim 1
Be: the two sides up and down of the top crown and bottom crown are respectively arranged with the screw hole with screw and nut.
3. carrying out the experimental rig of alternation of wetting and drying accelerated corrosion, feature under high voltage electric field environment according to claim 1
Be: the material of the top crown and bottom crown is stainless steel；The grading ring is the annulus that surface is covered by copper foil or tinfoil paper
Pipe.
4. carrying out the experimental rig of alternation of wetting and drying accelerated corrosion, feature under high voltage electric field environment according to claim 1
Be: the diameter of the top crown and bottom crown is 30cm-50cm；The diameter of the grading ring is 3cm-8cm.
5. carrying out the experimental rig of alternation of wetting and drying accelerated corrosion, feature under high voltage electric field environment according to claim 1
Be: the high voltage electric field generator setting is in corrosion case；The corrosion case includes: the external frame being made of acrylic board
Frame, the mesh-supported plate being horizontally set in the external frame, the solution tank being arranged in below the mesh-supported plate, setting
Thermostat heating cushion below the solution tank and the airflow fan being arranged on mesh-supported plate；The bottom crown setting
On mesh-supported plate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297898A (en) * | 2018-12-13 | 2019-02-01 | 福州大学 | The experimental rig and method of alternation of wetting and drying accelerated corrosion are carried out under high voltage electric field environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297898A (en) * | 2018-12-13 | 2019-02-01 | 福州大学 | The experimental rig and method of alternation of wetting and drying accelerated corrosion are carried out under high voltage electric field environment |
| CN109297898B (en) * | 2018-12-13 | 2023-08-11 | 福州大学 | Test device and method for dry-wet alternate accelerated corrosion under high-voltage electric field environment |
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