CN204832000U - Thin liquid film corrosion experiment device of constant temperature and humidity of steerable oxygen content - Google Patents
Thin liquid film corrosion experiment device of constant temperature and humidity of steerable oxygen content Download PDFInfo
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- CN204832000U CN204832000U CN201520645629.1U CN201520645629U CN204832000U CN 204832000 U CN204832000 U CN 204832000U CN 201520645629 U CN201520645629 U CN 201520645629U CN 204832000 U CN204832000 U CN 204832000U
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Abstract
The utility model discloses a thin liquid film corrosion experiment device of constant temperature and humidity of steerable oxygen content, including electrochemical corrosion measurement system, solution oxygen content control system, temperature control system and humidity control system, solution oxygen content control system includes oxygen content testing device, oxygen content adjusting device and nitrogen gas adjusting device, oxygen content testing device contains oxygen content testing probe and oxygen assay appearance, oxygen content adjusting device contains oxygen source and oxygen control valve, nitrogen gas adjusting device contains nitrogen gas source and nitrogen gas control valve. The utility model discloses can realize the control to the solution oxygen concentration according to the experiment needs, control is high with the precision of test. Ability holding device humidity is stable, greatly reduces because the change of the thickness of liquid film that the solution evaporation arouses, can realize corrosion of metals's under uniform temperature and thickness of liquid film electrochemistry data acquisition to the corrosion mechanism of truer accurately research metal under different membranes are thick.
Description
Technical field
The utility model relates to thin liquid film corrosion experiment to be improved, and is specifically related to a kind of constant temperature and humidity thin liquid film corrosion experimental device of controlled oxygen content, belongs to galvanic corrosion technical field.
Background technology
Atmospheric corrosion is one of modal corrosion phenomenon of metal material, and the thin liquid film corrosion in atmospheric corrosion is the important research direction of corrosion research.The corrosive gas often containing water miscible corrosivity salt in thin liquid film and dissolve in, produce considerable influence to metal erosion, thin liquid film thickness directly determines rate of metal corrosion simultaneously.
Along with the carrying out of corrosion reaction, corrosive medium liquid level in electrolytic tank may reduce because of reasons such as evaporation, participation reactions, cause the very big change of working electrode surface thickness of liquid film, the data that electrochemical workstation is measured do not have accuracy and reliability, the defect such as the reappearance of experimental phenomena and experimental result is low.
When corrosion environment temperature variation is very large, the molecular motion severe degree in corrosive medium is different, and the velocity of evaporation difference of corrosive medium greatly have impact on corrosion reaction process, produces material impact to experimental result.
Traditional thin liquid film thickness keeping method usually adopts and increases electrolytic tank area to reduce because evaporating the thin liquid film variation in thickness caused, or the sealing of Enhancement test device keeps the stable of thickness of liquid film with the method for the evaporation reducing corrosive medium.The method controllability is low, can not avoid the evaporation of corrosive medium completely, and meanwhile, the corrosive medium of evaporation also fails to be supplemented.
Traditional temperature-controlled process is utilize the PCO plant control office temperature such as room conditioning to keep the stable of probe temperature.The method temperature stability is poor, and can Range of measuring temp little, especially can not realize the control that corrosion temperature is subzero temperature.
Simultaneously, under this system mainly there is oxygen uptake reaction in negative electrode, along with the carrying out of corrosion reaction, on the one hand, in corrosive medium, oxygen content reduces gradually, on the other hand, thinning along with thickness of liquid film, the oxygen in air easily arrives solution surface, and corrosive medium oxygen content increases, therefore, the cathodic process important of oxygen content change to corrosion reaction.
Develop a kind of constant temperature and humidity thin liquid film corrosion experimental device controlling solution oxygen content, and set up corresponding experimental technique, greatly reduce the problems such as the change because corrosive medium evaporates the thickness of liquid film caused and the experimental result poor reproducibility that causes due to temperature contrast, the stable of oxygen content in solution can also be kept simultaneously, and then the deep research of system is carried out to the thin liquid film corrosion behavior of various material and corrosion mechanism, for abundant and development Corrosion Science correlation theory, especially thin liquid film erosion theory, there is important science and theory value; For researching and developing safeguard procedures, reducing the thin liquid film etching problem occurred in engineering, suppressing atmospheric corrosion, extend the serviceable life of the various equipment of being on active service in atmospheric environment, be of great practical significance and engineer applied value.
Utility model content
For prior art above shortcomings, the purpose of this utility model is to provide a kind of constant temperature and humidity thin liquid film corrosion experimental device controlling solution oxygen content.The utility model can experimentally need to realize the control to solution oxygen concentration, and automaticity is high, controls with the precision of test high, the favorable reproducibility of experimental data.In addition, the utility model energy holding device moisture stable, greatly reduces because solution evaporates the change of the thickness of liquid film caused; Range of measuring temp can be kept from sub-zero temperature to high temperature tens degree simultaneously, realize the electrochemical data acquisition of metal erosion under uniform temperature and thickness of liquid film, thus study corrosion of metal mechanism under different thickness more truely and accurately.
The technical solution of the utility model is achieved in that
A kind of constant temperature and humidity thin liquid film corrosion experimental device of controlled oxygen content, comprise galvanic corrosion measuring system, described galvanic corrosion measuring system comprises the electrolytic tank with gland bonnet, it is characterized in that, also comprise solution Control for Oxygen Content system, described solution Control for Oxygen Content system comprises oxygen content detector, oxygen content regulating device and nitrogen regulating device;
Oxygen content detector comprises oxygen content detection probe and determination of oxygen content instrument; Oxygen content detection probe is positioned at electrolytic tank and oxygen content for detecting solution; The signal output part of oxygen content detection probe is connected with determination of oxygen content instrument;
Oxygen content regulating device comprises source of oxygen and oxygen control valve; Source of oxygen is communicated with electrolytic tank by oxygen conveying pipe, and oxygen control valve is arranged on oxygen conveying pipe;
Nitrogen regulating device comprises source nitrogen and nitrogen gas control valve; Source nitrogen is communicated with electrolytic tank by nitrogen gas delivery-line, and nitrogen gas control valve is arranged in nitrogen gas delivery-line.
Further, the cell wall of electrolytic tank is the hollow structure with inner chamber;
Also comprise heating and cooling circulator, the liquid outlet of heating and cooling circulator is connected with the inlet of inner chamber by pipeline, and the inlet of heating and cooling circulator is connected with the liquid outlet of inner chamber by pipeline;
The temperature sensor for detecting solution temperature is also provided with at electrolyte bath; The output terminal of temperature sensor is connected with heating and cooling circulator.
Further, also comprise moisture control system, described moisture control system comprises humidifier and is positioned at the moisture detection probe of electrolytic tank; The gas outlet of described humidifier is communicated with electrolyte bath by pipeline, and the signal end of described moisture detection probe is connected with humidifier.
Electrolytic tank is positioned on iron stand, and the horizontal gird above iron stand is provided with micrometer caliper, and bottom micrometer caliper, correspondence is provided with probe, and probe is suspended in above electrolytic tank;
Described galvanic corrosion measuring system also comprises auxiliary electrode, contrast electrode and working electrode, and fix test specimen in a cell to form described working electrode, auxiliary electrode and contrast electrode are located in electrolytic tank, and contrast electrode is apart from working electrode surface 1-3mm; Auxiliary electrode, contrast electrode are connected respectively by the corresponding port of wire with micro-processor controlled electrochemical workstation with working electrode, form galvanic corrosion measuring system;
Multimeter and micrometer caliper, probe and working electrode form circuit system.
The mouth of pipe of oxygen conveying pipe and the mouth of pipe of nitrogen gas delivery-line are all equipped with filter screen, produce even tiny bubble, reduce specimen surface solution influenced to make to add when gas enters solution.
Described auxiliary electrode is made up of pvc pipe and platinum filament, pvc pipe diameter 16mm, and platinum filament diameter 0.25mm, purity are 99.9%, and platinum filament is wound in pvc pipe outer wall distance 0.5mm place, end, and auxiliary electrode is vertically fixed in a cell on bottom surface.
Described working electrode main body is the right cylinder steel of diameter 10mm and the pvc pipe of diameter 15mm, right cylinder steel one bottom surface welding lead, be welded with the right cylinder steel bottom surface of wire and whole side by epoxy resin sealing in pvc pipe, only expose other end as working electrode, wire passes from pvc pipe; It is in the PVC pipe of 16mm that working electrode is fixed on auxiliary electrode diameter, and working electrode surface and auxiliary electrode PVC pipe port keep same plane.
Described working electrode surface places small spirit bubble, and the leveling support height being triangle distribution by three on the base of regulating electrolytic tank makes working electrode surface level.
Compared to existing technology, the utility model has following beneficial effect:
1) the adjustable electrolytic tank of triangle installs small spirit bubble, level can be obtained by adjusting gear at any time, guarantee that the thin liquid film thickness of specimen surface is even, the metal erosion under same thickness of liquid film is tested and is carried out, meanwhile, the sandwich construction of electrolytic tank can control the stability of probe temperature effectively.
2) select heating and cooling circulator to realize accurate control to corrosion temperature, and the temperature controlling range of heating and cooling circulator is :-30-100 DEG C, experiment test temperature range can reach :-25-95 DEG C, can tests the thin liquid film system of very large-temperature range.
3) utilizing humidity controller and humidifier to control electrolytic tank humidity value is more than 85%RH, reduces to reduce owing to evaporating the corrosive medium liquid level caused, and keeps the stable of thickness of liquid film.
4) accurately can control the stable of oxygen content in solution according to dissolved oxygen content analyzer and aeration device, for specific corrosion system, this device can be tested accurately.
5) the galvanic corrosion measuring system be made up of auxiliary electrode, contrast electrode, working electrode (sample) and micro-processor controlled electrochemical workstation, under different thin liquid film thickness can be measured, the corrosion electrochemistry data such as the open circuit potential of sample in corrosive medium, polarization curve, AC impedance, electrochemistry noise, to study its galvanic corrosion behavior and mechanism.
In a word, this experimental provision can keep the stable of thin liquid film thickness and probe temperature easily and accurately, realize the electrochemical data acquisition work of metal erosion under steady temperature, different thickness of liquid film condition, thus study the thin liquid film corrosion mechanism of metal under steady temperature, different thickness more truely and accurately; Thin liquid film for minimizing metal corrodes to be provided more accurately, more reliable foundation, to improve performance and the life-span of equipment and apparatus.This device is by the temperature of heating and cooling circulator control corrosion rate environment, temperature controlling range is wide, and automaticity is high, controls with the precision of test high, combined by humidity controller and humidifier and control electrolytic tank humidity, automaticity is high, controls with the precision of test high, the favorable reproducibility of experimental data, simultaneously, experimentally can also need control corrosion system being carried out to oxygen concentration, when test oxygen content is stablized, the corrosion behavior under this thin liquid film system.
Accompanying drawing explanation
Fig. 1-the utility model thin liquid film corrosion experimental device structural representation.
Fig. 2-the utility model three electrode vertical view.
Fig. 3-with the utility model thin liquid film corrosion experimental device to test the cathodic polarization curve under the different-thickness obtained to a specific experiment system.
Fig. 4-Fig. 3 is analyzed to the Limited diffusion current density that obtains with thickness of liquid film change curve with the utility model thin liquid film corrosion experimental device.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
See Fig. 1, the constant temperature and humidity thin liquid film corrosion experimental device of the controlled oxygen content of the utility model, comprise galvanic corrosion measuring system, galvanic corrosion measuring system comprises again with the electrolytic tank 2 of transparent organic glass gland bonnet 6, auxiliary electrode 4, contrast electrode 5 and working electrode 3, electrolytic tank 2 is positioned on iron stand 1, horizontal gird 9 above iron stand is provided with micrometer caliper 8, and bottom micrometer caliper 8, correspondence is provided with probe 7, and probe 7 is suspended in above electrolytic tank 2.
In electrolytic tank 2, fix test specimen to form described working electrode 3, auxiliary electrode 4 and contrast electrode 5 are located in electrolytic tank 2, and contrast electrode 5 is apart from the surperficial 1-3mm of working electrode 3; Auxiliary electrode 4, contrast electrode 5 are connected respectively by the corresponding port of wire with micro-processor controlled electrochemical workstation 22 with working electrode 3, form galvanic corrosion measuring system; Multimeter 10 and micrometer caliper 8, probe 7 and working electrode 3 form circuit system.Above-mentioned contrast electrode 5 is saturated calomel electrode, and saturated calomel electrode is conventional electrochemical corrosion experimental contrast electrode, and its dependable performance, current potential are stablized, it is little to disturb; Auxiliary electrode 4 is
Φ0.25mm, purity is the platinum wire of 0.999, auxiliary electrode is wound in 0.5mm place below the plane of distance working electrode place, and to reduce voltage drop and other influence factor, the use of contrast electrode and auxiliary electrode ensures that the galvanic corrosion data result that this experimental provision is measured is more accurate, reliable.
The constant potential scope of electrochemical workstation 22 is-10-+10V, and the minimum sampling interval of current density-time is 1 μ s, and ac impedance measurement frequency is 0.00001 to 1MHz, and potential scanning speed scope is 0.000001V/s to 10,000V/s.This workstation measurement range is wide, resolution is high, stable performance, can ensure that the galvanic corrosion data result that this experimental provision is measured is more accurate, reliable.
This experimental provision also comprises solution Control for Oxygen Content system, temperature control system and moisture control system.
Described solution Control for Oxygen Content system comprises oxygen content detector, oxygen content regulating device and nitrogen regulating device.
Oxygen content detector comprises oxygen content detection probe 11 and determination of oxygen content instrument 12; Oxygen content detection probe 11 is positioned at electrolytic tank 2 and oxygen content for detecting solution; The signal output part of oxygen content detection probe 11 is connected with determination of oxygen content instrument 12.Determination of oxygen content instrument 12 dissolved oxygen sensing scope is 0-20.00mg/L, precision ± 0.30mg/L.
Oxygen content regulating device comprises source of oxygen 19 and oxygen control valve 20; Source of oxygen 19 is communicated with electrolytic tank 2 by oxygen conveying pipe, and oxygen control valve 20 is arranged on oxygen conveying pipe, and oxygen conveying pipe is also provided with oxygen flow meter 18.
Nitrogen regulating device comprises source nitrogen 16 and nitrogen gas control valve 17; Source nitrogen 16 is communicated with electrolytic tank 2 by nitrogen gas delivery-line, and nitrogen gas control valve 17 is arranged in nitrogen gas delivery-line, and nitrogen gas delivery-line is also provided with nitrogen flow meter 15.
Electrolytic tank 2 wall is provided with oxygen and passes into mouth 27 and nitrogen and pass into mouth 26 and corrosive medium entrance 25a and outlet 25b.
Temperature control system comprises heating and cooling circulator 23, and the cell wall of electrolytic tank 2 is the hollow structure with inner chamber, and electrolytic tank outer wall is through isothermal holding.The liquid outlet of heating and cooling circulator 23 is connected with the inlet 24a of inner chamber by pipeline 21, and the inlet of heating and cooling circulator 23 is connected with the liquid outlet 24b of inner chamber by pipeline 21.
The temperature sensor for detecting solution temperature is also provided with at electrolyte bath; The output terminal of temperature sensor is connected with heating and cooling circulator 23.Heating and cooling circulator, temperature sensor and hollow structure form temperature control system.
The constant temperature scope of heating and cooling circulator 23 is-30-100 DEG C, constant-temperature precision ± 0.03 DEG C, and temperature control solution is glycol water by a certain percentage.
Described moisture control system comprises humidifier 14 and is positioned at the moisture detection probe 13 of electrolytic tank; The gas outlet of described humidifier is communicated with electrolyte bath by pipeline, and the signal end of described moisture detection probe 13 is connected with humidifier 14.Humidifier 14 humidity regulation scope 10-99%RH, precision ± 2%RH.It is 0-98%RH that moisture detection probe 13 detects humidity range, precision ± 2%RH.
The mouth of pipe of oxygen conveying pipe and the mouth of pipe of nitrogen gas delivery-line are all equipped with filter screen, produce even tiny bubble, reduce specimen surface solution influenced to make to add when gas enters solution.
Described auxiliary electrode 4 is made up of pvc pipe and platinum filament, pvc pipe diameter 16mm, and platinum filament diameter 0.25mm, purity are 99.9%, and platinum filament is wound in pvc pipe outer wall distance 0.5mm place, end, and auxiliary electrode is vertically fixed in a cell on bottom surface.
Described working electrode 3 main body is the right cylinder steel of diameter 10mm and the pvc pipe of diameter 15mm, right cylinder steel one bottom surface welding lead, the right cylinder steel bottom surface and the whole side that are welded with wire are closed in pvc pipe 29 by epoxy resin 28, only expose other end as working electrode, wire passes from pvc pipe 29; It is in the PVC pipe of 16mm that working electrode 3 is fixed on auxiliary electrode diameter, and working electrode surface and auxiliary electrode PVC pipe port keep same plane.Fig. 2 is the utility model three electrode vertical view.
Small spirit bubble is placed on described working electrode 3 surface, and the leveling support height being triangle distribution by three on the base of regulating electrolytic tank makes working electrode surface level.
Adopt this thin liquid film corrosion experimental device to carry out metal erosion electrochemistry experiment under different thickness, operate as follows:
One, the setting of thickness of liquid film
Open multimeter, use COM and mA two wiring holes, measurement range selection 2mA, down tangent screw mircrometer gauge, make probe slowly close to working electrode surface, when multimeter reading changes, stop fine setting, then after reverse tangent screw mircrometer gauge to required thickness of liquid film place, stop fine setting, corrosive medium enters electrolytic tank from inlet microtubule, when liquid level in electrolytic tank rises to required thickness of liquid film gradually, liquid level and probes touch, the significant change again of multimeter registration, stop liquid feeding, now thickness of liquid film is required film thickness.
Two, humidity is constant
Seal around organic glass groove gland bonnet with adhesive waterproof tape, on gland bonnet, perforate, to put into working electrode wire, auxiliary electrode wire, contrast electrode, probe, oxygen content detection probe and moisture detection probe respectively, all carries out encapsulation process to the gap place of perforate simultaneously; Open humidifier, humidity value opened by setting humidifier is 85%RH, and closedown humidity value is 95%RH, utilizes moisture detection probe to control electrolytic tank humidity and keeps constant, to reduce solution evaporation, keep thickness of liquid film to stablize.
Three, the regulating and control of temperature
Laboratory room temperature is held constant at 22 DEG C; Opening heating and cooling circulator is outer circulation pattern, when carrying out thin liquid film corrosion experiment, determines the temperature of heating and cooling circulator and required experimental temperature T according to test
0temperature difference be Δ T, heating and cooling circulating air temperature is set for (T
0+ Δ T) DEG C, to ensure that electrolytic tank internal corrosion medium temperature is required experimental temperature T
0± 0.5 DEG C.
Four, the control of solution oxygen content
When testing the corrosion system of low oxygen content, closing oxygen control valve, opening nitrogen gas control valve, regulate nitrogen flow meter, in corrosive medium, be filled with nitrogen; When the corrosion system that test oxygen content is high, close nitrogen gas control valve, open oxygen control valve, regulate oxygen flowmeter, in solution, be filled with oxygen, the oxygen level in solution is determined by determination of oxygen content instrument registration.
Five, the collection of corrosion electrochemistry data
The corrosion electrochemistry data of upper sample are measured, in order to the galvanic corrosion behavior of sample under Study of Thin liquid film condition by electrochemical measurement system.
These data can the relation of the galvanic corrosion trend of analytical work sample, corrosion speed and corrosion speed and corrosion temperature and thickness further, the corrosion mechanism of systematic study metal material under thin liquid film condition, abundant and development corrosive electrochemistry theory, for the thin liquid film corrosion reducing metal provides more accurately, more reliable foundation; Develop effective safeguard procedures, improve equipment and the atmospheric corrosion resistance ability of apparatus, increase the service life.
Above device is adopted to carry out the result of specific experiment as follows:
Experiment material is: working electrode is
Φright cylinder 4130 steel of 10mm, after approved sample, apparent size is
Φ15 × 25mm, test medium to be concentration be 5% potassium formate solutions, setting heating and cooling circulator temperature is 9 DEG C, makes corrosive medium temperature be 15 ± 0.5 DEG C; Humidifier arranges and opens humidity value is 85%RH, and closedown humidity value is 95%RH; Working electrode is arranged on electrolytic tank center, regulate surface level, with gland bonnet, electrolytic tank is sealed, after working electrode wire, auxiliary electrode wire, contrast electrode, probe and Temperature and Humidity probe is drawn from the aperture that gland bonnet is offered, then with adhesive waterproof tape, all the other gaps are sealed.Open multimeter and use COM and mA two wiring holes, measurement range selection 2mA, down tangent screw mircrometer gauge, make probe slowly close to working electrode surface, when multimeter reading changes, stop fine setting, micrometer caliper is up driven to stop to required film thickness place, about 15 ± 0.5 DEG C corrosive mediums are slowly added to electrolytic tank from inlet, when multimeter registration changes again, stop feed liquor; Carry out electro-chemical test, keep temperature and humidity in electrolytic tank to stablize simultaneously.
Electro-chemical test major parameter is: open circuit potential
etest duration 1800s, ac impedance measurement frequency is 0.00001 to 1MHz, polarization curve polarized potential:
e± 0.5V, scanning speed is 0.001V/s, selects automatic sensitivity.
Fig. 3 is the cathodic polarization curve of 4130 steel under the different thin liquid film thickness of potassium formate type deicing liquid of 5% utilizing this thin liquid film corrosion experimental device to record, Fig. 4 is the Limited diffusion current density obtained according to Fig. 3 matching, can obtain from Fig. 3: the corrosion regularity of 4130 steel under different thin liquid film thickness is obvious, along with thickness of liquid film increases, corrosion potential is negative to be moved, show the increase along with thickness of liquid film, corrosion rate slows down; Fig. 4 shows, along with the reduction of thickness of liquid film, oxygen rate of propagation is accelerated, and Limited diffusion current density increases gradually, and cathodic polarization reaction is accelerated, and result is consistent with Fig. 3.
Above-described embodiment of the present utility model is only for the utility model example is described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other multi-form change and variations on the basis of the above description, the change of the length, width and height equivalence of such as sample can be made according to individual demand and change.Here cannot give exhaustive to all embodiments.Every belong to the technical solution of the utility model the apparent change of amplifying out or variation be still in the row of protection domain of the present utility model.
Claims (8)
1. the constant temperature and humidity thin liquid film corrosion experimental device of a controlled oxygen content, comprise galvanic corrosion measuring system, described galvanic corrosion measuring system comprises the electrolytic tank with gland bonnet, it is characterized in that, also comprise solution Control for Oxygen Content system, described solution Control for Oxygen Content system comprises oxygen content detector, oxygen content regulating device and nitrogen regulating device;
Oxygen content detector comprises oxygen content detection probe and determination of oxygen content instrument; Oxygen content detection probe is positioned at electrolytic tank and oxygen content for detecting solution; The signal output part of oxygen content detection probe is connected with determination of oxygen content instrument;
Oxygen content regulating device comprises source of oxygen and oxygen control valve; Source of oxygen is communicated with electrolytic tank by oxygen conveying pipe, and oxygen control valve is arranged on oxygen conveying pipe;
Nitrogen regulating device comprises source nitrogen and nitrogen gas control valve; Source nitrogen is communicated with electrolytic tank by nitrogen gas delivery-line, and nitrogen gas control valve is arranged in nitrogen gas delivery-line.
2. the constant temperature and humidity thin liquid film corrosion experimental device of controlled oxygen content according to claim 1, is characterized in that, the cell wall of electrolytic tank is the hollow structure with inner chamber;
Also comprise heating and cooling circulator, the liquid outlet of heating and cooling circulator is connected with the inlet of inner chamber by pipeline, and the inlet of heating and cooling circulator is connected with the liquid outlet of inner chamber by pipeline;
The temperature sensor for detecting solution temperature is also provided with at electrolyte bath; The output terminal of temperature sensor is connected with heating and cooling circulator.
3. the constant temperature and humidity thin liquid film corrosion experimental device of controlled oxygen content according to claim 1, is characterized in that, also comprise moisture control system, and described moisture control system comprises humidifier and is positioned at the moisture detection probe of electrolytic tank; The gas outlet of described humidifier is communicated with electrolyte bath by pipeline, and the signal end of described moisture detection probe is connected with humidifier.
4. the constant temperature and humidity thin liquid film corrosion experimental device of controlled oxygen content according to claim 1, it is characterized in that, electrolytic tank is positioned on iron stand, horizontal gird above iron stand is provided with micrometer caliper, bottom micrometer caliper, correspondence is provided with probe, and probe is suspended in above electrolytic tank;
Described galvanic corrosion measuring system also comprises auxiliary electrode, contrast electrode and working electrode, and fix test specimen in a cell to form described working electrode, auxiliary electrode and contrast electrode are located in electrolytic tank, and contrast electrode is apart from working electrode surface 1-3mm; Auxiliary electrode, contrast electrode are connected respectively by the corresponding port of wire with micro-processor controlled electrochemical workstation with working electrode, form galvanic corrosion measuring system;
Multimeter and micrometer caliper, probe and working electrode form circuit system.
5. the constant temperature and humidity thin liquid film corrosion experimental device of controlled oxygen content according to claim 1, it is characterized in that, the mouth of pipe of oxygen conveying pipe and the mouth of pipe of nitrogen gas delivery-line are all equipped with filter screen, produce even tiny bubble to make to add when gas enters solution, reduce specimen surface solution influenced.
6. the constant temperature and humidity thin liquid film corrosion experimental device of controlled oxygen content according to claim 4, it is characterized in that, described auxiliary electrode is made up of pvc pipe and platinum filament, pvc pipe diameter 16mm, platinum filament diameter 0.25mm, purity are 99.9%, platinum filament is wound in pvc pipe outer wall distance 0.5mm place, end, and auxiliary electrode is vertically fixed in a cell on bottom surface.
7. the constant temperature and humidity thin liquid film corrosion experimental device of controlled oxygen content according to claim 4, it is characterized in that, described working electrode main body is the right cylinder steel of diameter 10mm and the pvc pipe of diameter 15mm, right cylinder steel one bottom surface welding lead, be welded with the right cylinder steel bottom surface of wire and whole side by epoxy resin sealing in pvc pipe, only expose other end as working electrode, wire passes from pvc pipe; It is in the PVC pipe of 16mm that working electrode is fixed on auxiliary electrode diameter, and working electrode surface and auxiliary electrode PVC pipe port keep same plane.
8. the constant temperature and humidity thin liquid film corrosion experimental device of controlled oxygen content according to claim 4, it is characterized in that, described working electrode surface places small spirit bubble, and the leveling support height being triangle distribution by three on the base of regulating electrolytic tank makes working electrode surface level.
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| CN106053324A (en) * | 2016-05-19 | 2016-10-26 | 北京科技大学 | Moisture corrosion electrochemical testing device with controllable atmosphere and liquid film components |
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| CN106442306A (en) * | 2016-10-19 | 2017-02-22 | 辽宁石油化工大学 | Device and method capable of realizing electrochemical corrosion test under different dissolved oxygen content conditions |
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| CN110376121A (en) * | 2019-07-25 | 2019-10-25 | 中国石油大学(华东) | The thin liquid film system corrosion electrochemical test system and method for controllable temperature pressure-bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106053324A (en) * | 2016-05-19 | 2016-10-26 | 北京科技大学 | Moisture corrosion electrochemical testing device with controllable atmosphere and liquid film components |
| CN106053324B (en) * | 2016-05-19 | 2019-05-17 | 北京科技大学 | A kind of humidity corrosion electrochemical testing device of controlled atmosphere and liquid film ingredient |
| CN106289962A (en) * | 2016-10-12 | 2017-01-04 | 中国科学院金属研究所 | Can high low power online observation sample marking distance section deformation and the in-situ test system of damage |
| CN106289962B (en) * | 2016-10-12 | 2024-03-22 | 中国科学院金属研究所 | In-situ test system capable of observing deformation and damage of sample gauge length section in high-low power on-line manner |
| CN106442306A (en) * | 2016-10-19 | 2017-02-22 | 辽宁石油化工大学 | Device and method capable of realizing electrochemical corrosion test under different dissolved oxygen content conditions |
| CN106442306B (en) * | 2016-10-19 | 2023-09-01 | 辽宁石油化工大学 | Electrochemical corrosion testing device and method capable of realizing different dissolved oxygen content conditions |
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| CN109374518B (en) * | 2018-10-09 | 2021-07-09 | 中国科学院海洋研究所 | Testing device and method for simulating gas-liquid interface corrosion of nuclear waste liquid storage tank |
| CN110376121A (en) * | 2019-07-25 | 2019-10-25 | 中国石油大学(华东) | The thin liquid film system corrosion electrochemical test system and method for controllable temperature pressure-bearing |
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