CN109211759A - A kind of deaerating plant and its operating method for corrosion test solution - Google Patents
A kind of deaerating plant and its operating method for corrosion test solution Download PDFInfo
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- CN109211759A CN109211759A CN201710539569.9A CN201710539569A CN109211759A CN 109211759 A CN109211759 A CN 109211759A CN 201710539569 A CN201710539569 A CN 201710539569A CN 109211759 A CN109211759 A CN 109211759A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 176
- 238000005260 corrosion Methods 0.000 title claims abstract description 176
- 239000012085 test solution Substances 0.000 title claims abstract description 76
- 238000011017 operating method Methods 0.000 title claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 110
- 238000012360 testing method Methods 0.000 claims abstract description 95
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 37
- 239000001301 oxygen Substances 0.000 claims abstract description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 26
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 43
- 238000006392 deoxygenation reaction Methods 0.000 claims description 29
- 239000000919 ceramic Substances 0.000 claims description 21
- 239000011521 glass Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 11
- 230000008676 import Effects 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 238000011156 evaluation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 210000005239 tubule Anatomy 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 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
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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- General Health & Medical Sciences (AREA)
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- Degasification And Air Bubble Elimination (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a kind of deaerating plants and its operating method for corrosion test solution, including High Purity Nitrogen gas cylinder, vial and corrosion test closed container, the High Purity Nitrogen gas cylinder divides two-way by the first triple valve, it is connected in the vial equipped with corrosion test solution all the way, another way is connect with the second triple valve, second triple valve divides two-way, it is connect respectively with the vial and corrosion test with closed container, the corrosion test is separately connected vacuum pump and vent gas treatment container by third triple valve with closed container.The configuration of the present invention is simple is easily assembled to, it is easy to operate, it is cheap, the dissolved oxygen content in corrosion test solution can be effectively removed, current metal corrosion test existing oxygen corrosion problem in the process is effectively avoided, the accuracy and validity of metal corrosion test evaluation are improved.
Description
Technical field
The invention belongs to metal erosion experimental technique field, in particular to a kind of deaerating plant for corrosion test solution
And its operating method.
Background technique
In oil gas field production, tubing and casing and delivery pipe are often due to CO2、H2S, the corrosion of elementary sulfur, water flooding etc. and make
Olefiant gas leakage accident causes environmental pollution, personal injury and economic loss, seriously threatens the production run of oil gas field.
For the safety in production for ensureing oil gas field, usually existed using laboratory corrosiontesting method evaluation tubing and casing, delivery pipe
Adaptability in oil gas field production status.However, the dissolved oxygen in corrosion test solution often leads to corrosion test result not
Accuracy.Oxygen is a part in air, is to cause metal parts that atmospheric corrosion and soil corrosion occurs in industrial production
Principal element.But the closed environment category oxygen-free environment of production of hydrocarbons, laboratory utilize corrosion tests evaluation metal material
When corrosion resistance, if the dissolved oxygen expeling not yet in effect in corrosion test solution, dissolved oxygen are significantly larger than the contribution of metal erosion
Other corrosion factors (such as CO2And H2S), there is very large deviation so as to cause corrosion test result.
Currently, most laboratory is by being passed through inert gas (such as nitrogen) into corrosion test solution to drive away in solution
Dissolved oxygen, but still remain following both sides problem: (1) deoxygenation be usually corrosion test solution with test button contact after
It carries out, the oxygen corrosion for testing early period is inevitable；(2) if corroding there are when oxidizable cation in oil gas field corrosive environment
Test can cause result invalid because dissolved oxygen is by cationic oxidation.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of for corroding
The deaerating plant and its operating method of testing liquid, dissolved oxygen that can thoroughly in Efficacy solution, avoid test button because
Oxygen corrosion and cause test result deviation excessive or invalid.
The invention adopts the following technical scheme:
A kind of deaerating plant for corrosion test solution, including High Purity Nitrogen gas cylinder, vial and corrosion test are with closed
Container, the High Purity Nitrogen gas cylinder divide two-way by the first triple valve, are connected in the vial equipped with corrosion test solution all the way,
Another way is connect with the second triple valve, and second triple valve divides two-way, respectively with the vial and corrosion test with closed
Container connection, the corrosion test are separately connected vacuum pump and vent gas treatment container by third triple valve with closed container.
Further, it is disposed with pressure reducing valve between the High Purity Nitrogen gas cylinder and first triple valve, first screws
Valve and the first deoxidation box are provided with for reducing the deoxidier of the oxygen content in source nitrogen in the first deoxidation box.
Further, the shut-off valve that passes through all the way of first triple valve is connect with the glass tube, in the glass tube
It is provided with porous ceramics, the shut-off valve is connect with the porous ceramics.
Further, water container is also connected in the vial, the water container successively passes through the second deoxidation box
It screws valve with second to be connected in the vial, the pipe end in the vial is higher than the position of the porous ceramics.
Further, third is provided between the branch and the vial of second triple valve and screws valve, separately
One branch is connect with the corrosion test with closed container, for control import corrosion test with the medium in closed container come
Source.
Further, the vent gas treatment container successively passes through third deoxidation box, third triple valve and the corrosion test
It is connected with closed container, drives away the air in the corrosion test container using the high pure nitrogen of deoxidation.
Further, the vacuum pump successively passes through pressure vacuum gauge, third triple valve and the corrosion test container and connects
It connects.
Further, it is set with seal rubber plug on the vial, for ensuring the leakproofness of vial.
A kind of operating method for corrosion test solution deaerating plant, comprising the following steps:
S1,4~8L corrosion test solution is placed in the vial that capacity is 10L, using seal rubber plug by vial
Sealing, and ensure that porous ceramics is immersed in the bottom of corrosion test solution；
S2, it pressure reducing valve, first is screwed into valve is placed in opening state, screw valve, shut-off valve and third for second and screw valve and set
In closed state, the first triple valve is connected to the second triple valve, third triple valve is connected to third deoxidation box, from high pure nitrogen
It is passed through nitrogen in bottle, after the first deoxidation box preliminary deoxidation, enters corrosion test container through the first triple valve, the second triple valve,
Air in corrosion test container is driven away, is discharged after third triple valve, third deoxidation box, vent gas treatment container, makes to corrode
The high pure nitrogen of deoxidation is full of in test chamber；
S3, pressure reducing valve and the closing of the second triple valve, third triple valve are connected to pressure gauge, opening vacuum pump tries corrosion
The pressure tested in container reaches 0.1Pa；
S4, pressure reducing valve, first are screwed to valve, shut-off valve, second valve is screwed and is placed in opening state, third is screwed into valve,
Two triple valves, third triple valve are placed in off, and the first triple valve is connected to shut-off valve, then high-purity in High Purity Nitrogen gas cylinder
Nitrogen enters in corrosion test solution after the first preliminary deoxygenation of deoxidation box through the first triple valve, shut-off valve and porous ceramics, produces
Raw a large amount of dispersion bubbles, drive away dissolved oxygen in corrosion test solution through second screw valve, the second deoxidation box and water container and
Discharge；
S5, pressure reducing valve, first are screwed to valve, the first triple valve, shut-off valve, second valve is screwed and is placed in off, by
Three, which screw valve, is placed in opening state, and the second triple valve and third screw to valve is connected to, third triple valve is connected to pressure gauge, corrodes
Testing liquid imports in corrosion test container because of the negative pressure in corrosion test container；
S6, by shut-off valve, second screw valve, third screws valve and vacuum pump is placed in off, by the first triple valve with
The connection of second triple valve, the second triple valve are connected to corrosion test reservoir, third triple valve with third deoxidation box, will be depressurized
Valve, first screw valve and are placed in opening state, continue to be passed through high pure nitrogen to the corrosion test solution deoxygenation in corrosion test container
After 1h, the dissolved oxygen content in corrosion test solution is not more than 1ppm.
Further, in step S4, control high pure nitrogen flow is 100ml/min, when at least guaranteeing every 1L solution deoxygenation
Between be 1h.
Compared with prior art, the present invention at least has the advantages that
High Purity Nitrogen gas cylinder of the present invention for corrosion test solution deaerating plant divides two-way by the first triple valve, connects all the way
Be connected in the vial equipped with corrosion test solution, another way divides two-way by the second triple valve, respectively with vial and corrosion
Test is connected with closed container, and corrosion test is separately connected vacuum pump by third triple valve with closed container and vent gas treatment is held
Nitrogen stream can be divided into two lines by device, the first triple valve, and a line enters etchant solution and carries out deoxygenation, and another line enters corrosion test appearance
Device drives away the air in corrosion test container, while the whereabouts to nitrogen stream can be effectively controlled, and the second triple valve is used to control to lead
Enter the medium sources in corrosion test container, so that the corrosion test solution after deoxygenation imports corrosion test container because of suction function
In, and the toxic or corrosivity tail gas generated during corrosion test is handled by vent gas treatment container, vent gas treatment container can
Depending on gaseous species involved in corrosion test, the discharge of high pure nitrogen is not influenced.
Further, powder deoxidier is placed in deoxidation box, the purpose is to the nitrogen progress to coming out in High Purity Nitrogen gas cylinder
Preliminary deoxygenation, to reduce the oxygen content in source nitrogen.
Further, the porous ceramics of setting can be by the nitrogen dispersion in tubule in corrosion test solution, to improve
The contacting efficiency of nitrogen and corrosion test solution, porous ceramics can effective gas dispersion, porosity should be not less than 75%, hole ruler
It is very little to should be less than 0.5mm.
Further, the pressure for the High Purity Nitrogen gas cylinder that the present apparatus uses is at least 5MPa, and nitrogen gas purity is at least
99.99%, deoxidation box can effectively remove the oxygen impurities in high pure nitrogen, and removal efficiency should reach 95% or more, wide mouth glass bottle
Capacity is not more than 10L, and seal rubber plug should be mating with wide mouth glass bottle, guarantees good leakproofness, and corrosion test solution answers root
It is configured according to inorganic salts, in the presence of having organic matter not soluble in water, can be led due to wide mouth glass bottle bottle wall is adsorbed because of organic matter
The reduction of its concentration is caused, the volume of corrosion test solution is not more than the 75% of wide mouth glass bottle capacity.
Further, pressure vacuum gauge should be able to cover the limiting pressure range of vacuum pump, and can accurately show corrosion test
Pressure in container, the limiting pressure of vacuum pump reach≤0.06Pa, and the flow of high pure nitrogen should be able to be controlled in 50-200ml/
min。
The present invention also provides a kind of operating methods for corrosion test solution deaerating plant, in High Purity Nitrogen cylinder outlet
Design has deoxidation box, and tentatively to remove the oxygen impurities in high pure nitrogen, before deoxygenation, corrosion test solution and test button be not direct
Contact, corrosion test solution are placed in wide mouth glass bottle, and corrosion sample is placed in corrosion test container, therefore will not be generated
Oxygen corrosion.Three steps of oxygen removal process point: the first step is the air driven away in corrosion test container using high pure nitrogen, and utilizes vacuum
Pump is so that corrosion test container generates negative pressure；Second step is to drive away the corrosion being placed in wide mouth glass bottle using high pure nitrogen to try
Test the dissolved oxygen in solution；Third step is to be tried the corrosion being placed in wide mouth glass bottle using the negative pressure in corrosion test container
It tests solution and imports corrosion test container, test button is contacted with the corrosion test solution of deoxygenation, will not generate oxygen corrosion；4th step
It is to continue to be passed through high pure nitrogen deoxygenation 1h, make in corrosion test solution to further decrease the oxygen content in corrosion test solution
Control for Oxygen Content in 1ppm or less.
In conclusion the configuration of the present invention is simple, be easily assembled to, it is easy to operate, it is cheap, corrosion examination can be effectively removed
The dissolved oxygen content in solution is tested, existing oxygen corrosion problem during current metal corrosion test is effectively avoided, improves metal
The accuracy and validity of corrosion test evaluation.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the schematic diagram provided by the present invention for the device of corrosion test solution deoxygenation.
Wherein: 1. High Purity Nitrogen gas cylinders；2. pressure reducing valve；3. first screws valve；4. the first deoxidation box；5. the first triple valve；6.
Shut-off valve；7. porous ceramics；8. second screws valve；9. the second deoxidation box；10. water container；11. seal rubber plug；12. glass
Bottle；13. corrosion test solution；14. third screws valve；15. the second triple valve；16. corrosion test closed container；17. third
Triple valve；18. third deoxidation box；19. vent gas treatment container；20. pressure vacuum gauge；21. vacuum pump.
Specific embodiment
In the description of the present invention, it is to be understood that, the orientation or position of the instructions such as term "bottom", "inner", "outside" are closed
System is merely for convenience of description of the present invention and simplification of the description to be based on the orientation or positional relationship shown in the drawings, rather than indicates
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitation of the present invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply
Relative importance or the quantity for implicitly indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
The present invention provides a kind of deaerating plants for corrosion test solution, using in deoxidation box removal high pure nitrogen
Oxygen impurities；Corrosion test solution and test button are directly contacted before avoiding deoxygenation and generate oxygen corrosion；Respectively to corrosion test
After container and corrosion test solution carry out deoxygenation, corrosion test solution is imported into corrosion examination using the negative pressure in corrosion test container
Container is tested, and continues deoxygenation 1h, by the Control for Oxygen Content in corrosion test solution in 1ppm or less.
Referring to Fig. 1, a kind of deaerating plant for corrosion test solution of the present invention includes High Purity Nitrogen gas cylinder 1, pressure reducing valve
2, it first screws valve 3, the first deoxidation box 4, the first triple valve 5, shut-off valve 6, porous ceramics 7, second screw valve 8, the second deoxidation
Box 9, water container 10, seal rubber plug 11, vial 12, corrosion test solution 13, third screw valve 14, the second triple valve 15,
Corrosion test closed container 16, third triple valve 17, deoxidation box 18, vent gas treatment container 19, pressure vacuum gauge 20 and vacuum
Pump 21, the specific requirement and effect of each component part are as follows:
The High Purity Nitrogen gas cylinder 1 divides two-way by the first triple valve 5, is connected to the glass equipped with corrosion test solution 13 all the way
In glass bottle 12, another way is connect with the second triple valve 15, and second triple valve 15 divides two-way, respectively with the vial 12 and
Corrosion test is connected with closed container 16, is also connected with water container 10 in the vial 12, and the corrosion test is with closed
Container 16 is separately connected vacuum pump 21 and vent gas treatment container 19 by third triple valve 17.
It is disposed with pressure reducing valve 2 between the High Purity Nitrogen gas cylinder 1 and first triple valve 5, first screws valve 3 and
One deoxidation box 4, wherein the High Purity Nitrogen gas cylinder 1 is the capital equipment of corrosion test solution deoxygenation, must guarantee enough pressure and
Nitrogen gas purity generally requires storage pressure in 5MPa or more, and nitrogen gas purity is 99.99% or more；It is put in the first deoxidation box 4
Powder deoxidier is set, the purpose is to carry out preliminary deoxygenation to the nitrogen come out in High Purity Nitrogen gas cylinder 1, to reduce the oxygen in source nitrogen
Content.
First triple valve 5 is connect by shut-off valve 6 with the glass tube 12 all the way, setting in the glass tube 12
There is porous ceramics 7, the shut-off valve 6 is connect with the porous ceramics 7, and corrosion test solution 13 is the object of deoxygenation, and solution is high
Degree must be higher than the porous ceramics 7, and the effect of the porous ceramics 7 is by the nitrogen dispersion in tubule in corrosion test solution
In, to improve the contacting efficiency of nitrogen Yu corrosion test solution.
The water container 10 successively screws valve 8 by the second deoxidation box 9 and second and is connected in the vial 12, institute
State the position that the pipe end in vial 12 is higher than the porous ceramics 7.
The effect of the water container 10 is how much to judge the leakproofness of vial 12 according to bubble in oxygen removal process；Institute
Stating the effect that second screws valve 8 is after the completion of deoxygenation, and closing it can prevent the reverse irrigation of outside air from entering corrosion test solution；
Powder deoxidier is placed in the second deoxidation box 9, the purpose is to after deoxygenation, reduce the second oxygen for screwing 8 both ends of valve
Concentration difference, anti-block penetrate into second and screw valve 8 and enter corrosion test solution.
It is provided with third between the branch and the vial 12 of second triple valve 15 and screws valve 14, described
Three screw valve 14 is in close state always in oxygen removal process, and vacuum degree reaches to the end of deoxygenation and in corrosion test container 16
Opened again after it is required that so that the corrosion test solution 13 of deoxygenation because suction function import corrosion test container 16 in, the two or three
Another branch and corrosion test of port valve 15 are connected with closed container 16, import corrosion test closed container 16 for controlling
In medium sources.
The vent gas treatment container 19 is successively by third deoxidation box 18, third triple valve 17 and the corrosion test with close
The connection of container 16 is closed, the effect of the vent gas treatment container 19 is the toxic or corrosivity tail generated during handling corrosion test
Gas when the third triple valve 17 is opened with one end that third deoxidation box 18 is connected, is driven away using the high pure nitrogen of deoxidation
Air in corrosion test container 16, until the high pure nitrogen that corrosion test container 16 is all deoxidized is full of.
The effect of third deoxidation box 18 is similar to the effect of the second deoxidation box 9, be anti-block infiltration third triple valve 17 and
Into corrosion test solution.
The vacuum pump 21 successively connects by pressure vacuum gauge 20, third triple valve 17 and the corrosion test container 16
It connects, when pipeline is connected, so that the vacuum degree in corrosion test container 16 reaches requirement, wherein the limiting pressure of vacuum pump 21
It is required that≤0.06Pa.
Under normal circumstances, one end that the second triple valve 15 and the first triple valve 5 are connected first is opened, so that the height of deoxidation
After pure nitrogen gas enters in corrosion test container 16 to drive away air therein, which is closed.
When the vacuum degree in corrosion test container 16 reaches requirement, then opens the second triple valve 15 and screw valve 14 with third
One end being connected, so that the corrosion test solution 13 after deoxygenation is because in suction function importing corrosion test container 16.
It is set with seal rubber plug 11 on the vial 12, for ensuring the leakproofness of vial.
Operating method of the present invention for the device of corrosion test solution deoxygenation, specific as follows:
S1,4~8L corrosion test solution 13 is placed in the vial 12 that capacity is 10L, it will using seal rubber plug 11
Vial 12 seals, and ensures that porous ceramics 7 is immersed in the bottom of corrosion test solution 13；
S2, it pressure reducing valve 2, first is screwed into valve 3 is placed in opening state, screw valve 8, shut-off valve 6 and third for second and screw
Valve 14 is placed in off, and the first triple valve 5 is connected to the second triple valve 15, third triple valve 17 connects with third deoxidation box 18
It is logical, it is passed through high pure nitrogen from High Purity Nitrogen gas cylinder 1, after 4 preliminary deoxidation of the first deoxidation box, through the first triple valve 5, the second threeway
Valve 15 enters corrosion test container 16, the air in corrosion test container 16 is driven away, through third triple valve 17, third deoxidation box
18, it is discharged after vent gas treatment container 19, while making the high pure nitrogen for being full of deoxidation in corrosion test container 16；
S3, pressure reducing valve 2 and the closing of the second triple valve 15, third triple valve 17 are connected to pressure gauge 20, open vacuum pump
21, so that the pressure in corrosion test container 16 is reached 0.1Pa；
S4, pressure reducing valve 2, first are screwed to valve 3, shut-off valve 6, second valve 8 is screwed and is placed in opening state, third is screwed into valve
14, the second triple valve 15, third triple valve 17 are placed in off, and the first triple valve 5 are connected to shut-off valve 6, then High Purity Nitrogen
High pure nitrogen in gas cylinder 1 enters after the preliminary deoxygenation of the first deoxidation box 4 through the first triple valve 5, shut-off valve 6 and porous ceramics 7
In corrosion test solution 13, generate a large amount of dispersion bubbles, drive away dissolved oxygen in corrosion test solution 13 through second screw valve 8,
Second deoxidation box 9 and water container 10 and be discharged, control high pure nitrogen flow be 100ml/min, the duration is because of corrosion test
The volume of solution 13 and it is different, at least guarantee every 1L solution deoxygenation time be 1h；
S5, pressure reducing valve 2, first are screwed to valve 3, the first triple valve 5, shut-off valve 6, second valve 8 is screwed and is placed in off,
Third is screwed into valve 14 and is placed in opening state, by the second triple valve 15 and third screw valve 14 be connected to, third triple valve 17 and pressure
Power table 20 is connected to, and corrosion test solution 13 imports in corrosion test container 16 because of the negative pressure in corrosion test container 16；
S6, shut-off valve 6, second are screwed into valve 8, third screws valve 14 and vacuum pump 21 is placed in off, by the one or three
Port valve 5 is connected to the second triple valve 15, the second triple valve 15 is connected to corrosion test container 16, third triple valve 17 and third are de-
Oxygen box 18 is connected to, and pressure reducing valve 2, first are screwed valve 3 and are placed in opening state, continues to be passed through high pure nitrogen to corrosion test container 16
In corrosion test solution deoxygenation 1h after, the dissolved oxygen content in corrosion test solution is in 1ppm or less.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of deaerating plant for corrosion test solution, which is characterized in that including High Purity Nitrogen gas cylinder (1), vial (12)
With corrosion test with closed container (16), the High Purity Nitrogen gas cylinder (1) divides two-way by the first triple valve (5), is connected to all the way
In vial (12) equipped with corrosion test solution (13), another way is connect with the second triple valve (15), second triple valve
(15) divide two-way, connect respectively with the vial (12) and corrosion test with closed container (16), the corrosion test is with close
It closes container (16) and is separately connected vacuum pump (21) and vent gas treatment container (19) by third triple valve (17).
2. a kind of deaerating plant for corrosion test solution according to claim 1, which is characterized in that the High Purity Nitrogen
It is disposed with pressure reducing valve (2) between gas cylinder (1) and first triple valve (5), first screws valve (3) and the first deoxidation box
(4), it is provided in the first deoxidation box (4) for reducing the deoxidier of the oxygen content in source nitrogen.
3. a kind of deaerating plant for corrosion test solution according to claim 1, which is characterized in that the described 1st
Connecting all the way by shut-off valve (6) with the glass tube (12) for port valve (5), is provided with porous ceramics in the glass tube (12)
(7), the shut-off valve (6) connect with the porous ceramics (7).
4. a kind of deaerating plant for corrosion test solution according to claim 3, which is characterized in that the vial
(12) it is also connected with water container (10) in, the water container (10) successively screws valve by the second deoxidation box (9) and second
(8) it is connected in the vial (12), the pipe end in the vial (12) is higher than the position of the porous ceramics (7)
It sets.
5. a kind of deaerating plant for corrosion test solution according to claim 1, which is characterized in that the described 2nd 3
It is provided with third between the branch and the vial (12) of port valve (15) to screw valve (14), another branch and the corruption
Corrosion test is connected with closed container (16), for controlling the medium sources imported in corrosion test closed container (16).
6. a kind of deaerating plant for corrosion test solution according to claim 1, which is characterized in that at the tail gas
Container (19) are managed successively to be connected by third deoxidation box (18), third triple valve (17) and the corrosion test with closed container (16)
It connects, drives away the air in the corrosion test container (16) using the high pure nitrogen of deoxidation.
7. a kind of deaerating plant for corrosion test solution according to claim 1, which is characterized in that the vacuum pump
(21) it is successively connect by pressure vacuum gauge (20), third triple valve (17) with the corrosion test container (16).
8. a kind of deaerating plant for corrosion test solution according to claim 1, which is characterized in that the vial
(12) seal rubber plug (11) are set on, for ensuring the leakproofness of vial.
9. the operating method of deaerating plant as described in claim 1 always, which comprises the following steps:
S1,4~8L corrosion test solution is placed in the vial that capacity is 10L, is sealed vial using seal rubber plug,
And ensure that porous ceramics is immersed in the bottom of corrosion test solution；
S2, it pressure reducing valve, first is screwed into valve is placed in opening state, screw valve, shut-off valve and third for second and screw valve and be placed in pass
Closed state, the first triple valve is connected to the second triple valve, third triple valve is connected to third deoxidation box, from High Purity Nitrogen gas cylinder
It is passed through nitrogen, after the first deoxidation box preliminary deoxidation, enters corrosion test container through the first triple valve, the second triple valve, it will be rotten
Air in corrosion test container is driven away, and is discharged after third triple valve, third deoxidation box, vent gas treatment container, makes corrosion test
The high pure nitrogen of deoxidation is full of in container；
S3, pressure reducing valve and the closing of the second triple valve, third triple valve are connected to pressure gauge, opening vacuum pump holds corrosion test
Pressure in device reaches 0.1Pa；
S4, pressure reducing valve, first are screwed to valve, shut-off valve, second valve is screwed and is placed in opening state, third is screwed into valve, the two or three
Port valve, third triple valve are placed in off, and the first triple valve are connected to shut-off valve, then the high pure nitrogen in High Purity Nitrogen gas cylinder
After the first preliminary deoxygenation of deoxidation box, enter in corrosion test solution through the first triple valve, shut-off valve and porous ceramics, generates big
Amount dispersion bubble, the dissolved oxygen driven away in corrosion test solution screw valve, the second deoxidation box and water container through second and are discharged；
S5, pressure reducing valve, first are screwed to valve, the first triple valve, shut-off valve, second valve is screwed and is placed in off, third is revolved
Stubborn valve is placed in opening state, and the second triple valve and third screw to valve is connected to, third triple valve is connected to pressure gauge, corrosion test
Solution imports in corrosion test container because of the negative pressure in corrosion test container；
S6, by shut-off valve, second screw valve, third screws valve and vacuum pump is placed in off, by the first triple valve and second
Triple valve connection, the second triple valve be connected to corrosion test reservoir, third triple valve with third deoxidation box, by pressure reducing valve,
First, which screws valve, is placed in opening state, continues to be passed through high pure nitrogen to the corrosion test solution deoxygenation 1h in corrosion test container
Afterwards, the dissolved oxygen content in corrosion test solution is not more than 1ppm.
10. a kind of operating method for corrosion test solution deaerating plant according to claim 1, which is characterized in that
In step S4, control high pure nitrogen flow is 100ml/min, at least guarantees that every 1L solution deoxygenation time is 1h.
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