CN113866080B - Salt corrosion damage test device and method for simulating porous medium material - Google Patents
Salt corrosion damage test device and method for simulating porous medium material Download PDFInfo
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- CN113866080B CN113866080B CN202111142244.XA CN202111142244A CN113866080B CN 113866080 B CN113866080 B CN 113866080B CN 202111142244 A CN202111142244 A CN 202111142244A CN 113866080 B CN113866080 B CN 113866080B
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- 238000012360 testing method Methods 0.000 title claims abstract description 110
- 150000003839 salts Chemical class 0.000 title claims abstract description 106
- 230000007797 corrosion Effects 0.000 title claims abstract description 68
- 238000005260 corrosion Methods 0.000 title claims abstract description 68
- 230000006378 damage Effects 0.000 title claims abstract description 65
- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- 230000008859 change Effects 0.000 claims abstract description 39
- 230000001502 supplementing effect Effects 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 22
- 238000005303 weighing Methods 0.000 claims abstract description 17
- 238000009826 distribution Methods 0.000 claims abstract description 13
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000000523 sample Substances 0.000 claims description 144
- 238000005057 refrigeration Methods 0.000 claims description 15
- 230000005012 migration Effects 0.000 claims description 14
- 238000013508 migration Methods 0.000 claims description 14
- 239000003989 dielectric material Substances 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- 238000010998 test method Methods 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010223 real-time analysis Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008093 supporting effect Effects 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The application belongs to the technical field of salt corrosion of porous medium materials, and particularly relates to a device and a method for simulating salt corrosion damage test of a porous medium material. The application comprises a water supplementing system, a temperature and humidity control system, a digital acquisition system, a salinity sensor, a weighing device and a temperature control box; a test sample is placed in the temperature control box, and a plurality of salt sensors are arranged in the test sample; the water supplementing system conveys liquid to the bottom of the test sample, and the temperature and humidity control system controls the temperature and humidity in the temperature control box in real time, so that the actual salt corrosion damage process of the porous medium material under the conditions of dry-wet alternation and temperature change is simulated, and the real-time salt distribution, water absorption condition, quality change rate and state change of salt corrosion damage of the porous medium material are utilized. The application can simulate the actual salt corrosion damage process of the porous medium material under the conditions of dry-wet alternation and temperature change, and collect the salt distribution, the water absorption condition, the mass change rate and the state change of salt corrosion damage of the test sample in real time.
Description
Technical Field
The application belongs to the technical field of salt corrosion of porous medium materials, and particularly relates to a device and a method for simulating salt corrosion damage test of a porous medium material.
Background
Salt corrosion is a main natural factor for inducing the destruction of the porous dielectric material, and the dry-wet alternation and the temperature change can aggravate the erosion of the porous dielectric material by the salt, thereby causing the performance of the porous dielectric material to be seriously affected. Although great efforts have been made to prevent and protect porous dielectric materials from salt corrosion, there are still a number of problems to be solved. In vast areas of China, porous medium material structures are always under the damage of salt corrosion under the coupling action of temperature and humidity. At present, few devices for simulating salt corrosion damage of samples in a temperature and humidity coupling state are used in China.
Disclosure of Invention
The application provides a device and a method for simulating salt corrosion damage of a porous medium material, which aims to solve the problem that the prior art lacks a device for researching salt corrosion damage of a sample in a coupling state of simulated temperature and humidity.
The application is realized by adopting the following technical scheme: a simulated porous medium material salt corrosion damage test device and method comprises a water supplementing system, a temperature and humidity control system, a digital acquisition system, a salt sensor, a weighing device and a temperature control box;
a test sample is placed in the temperature control box, and a plurality of salt sensors are arranged in the test sample;
the temperature and humidity control system is communicated with the temperature control box;
the weighing device is placed right below the test sample;
the salinity sensor, the water supplementing system and the weighing device are electrically connected with the digital acquisition system;
the water supplementing system conveys liquid to the bottom of a test sample, the temperature and humidity control system controls the temperature and humidity in the temperature control box in real time, so that the actual salt corrosion damage process of a porous medium material under the conditions of alternation of dryness and humidity and temperature change is simulated, and the real-time detection and analysis of the water salt migration rule, the quality change of the sample and the surface layer damage state of the sample in the salt corrosion damage process are realized through the real-time salt distribution, the water absorption condition, the quality change rate and the state change of the salt corrosion damage of the porous medium material.
Further, the bottom of accuse temperature case is equipped with the support, the top of support is equipped with the support bottom plate, two through-holes have been seted up on the support bottom plate, through-hole and moisturizing system intercommunication, be connected with the fixed bolster around the support bottom plate, be equipped with round recess on the fixed bolster bottom inner wall, install the sealing washer in the recess, the cuboid sample case has been placed in the fixed bolster, the fixed bolster passes through the sealing washer with the cuboid sample case and seals, the cuboid sample case is upper and lower open-ended cuboid, test sample is placed in the cuboid sample case, equidistant interval is provided with a plurality of probe holes from bottom to top on the lateral wall of cuboid sample case, salinity sensor installs in the probe hole.
Furthermore, water permeable stones and filter paper are paved on a support bottom plate in the temperature control box from bottom to top, and the test sample is contacted with the filter paper.
Further, the water replenishing system comprises a Ma Liaote bottle, a water guide pipe and a water level regulating pipe;
the Ma Liaote bottle is arranged outside the temperature control box, the Ma Liaote bottle is communicated with one through hole on the bottom plate of the support through a water guide pipe, and the other through hole is connected with the water level regulating pipe;
the water guide pipe is provided with a first flowmeter and a valve, and the first flowmeter is electrically connected with the digital acquisition system.
Further, the temperature and humidity control system comprises a temperature and humidity controller, a heater, a refrigeration compressor, a ventilation pipeline and a spray humidifier;
the spray humidifier is provided with a second flowmeter, and the second flowmeter, the heater and the refrigeration compressor are electrically connected with the temperature-humidity controller;
the spray humidifier is arranged in the temperature control box, the heater and the refrigeration compressor are arranged outside the temperature control box, and the heater and the refrigeration compressor are communicated to the inside of the temperature control box through a ventilation pipeline.
Further, the application also comprises an electronic computer;
the digital acquisition system and the temperature and humidity controller are electrically connected with the electronic computer.
Furthermore, the application also comprises a high-resolution camera and a shadowless lamp, wherein the high-resolution camera and the shadowless lamp are arranged at the top of the temperature control box, and the shadowless lamp is a cold light source with an adjustable light source.
Further, the application also comprises a radiation lamp which is arranged at the top of the temperature control box and is electrically connected with the electronic computer.
Furthermore, the cuboid sample box is made of organic glass.
A salt corrosion damage test method for simulating a porous medium material is characterized in that a test sample is arranged in a cuboid sample box after preparation, the cuboid sample box is fixed on a fixed support, a water supplementing system supplements liquid for the test sample to carry out a test, and meanwhile, a temperature and humidity control system controls the temperature and humidity in a temperature control box in the test process, so that the actual salt corrosion damage process of the porous medium material under the conditions of alternation of dry and wet and temperature change is simulated, and a digital acquisition system acquires the salt distribution, water absorption condition, mass change rate and state change of salt corrosion damage of the test sample in real time.
Compared with the prior art, the application has the beneficial effects that:
1. the water supplementing system supplements liquid to the test sample for testing, meanwhile, the temperature and humidity control system controls the temperature and humidity in the temperature control box in the test process, the actual salt corrosion damage process of the porous medium material under the conditions of dry-wet alternation and temperature change is simulated, the digital acquisition system acquires the salt distribution, the water absorption condition, the mass change rate and the state change of salt corrosion damage of the test sample in real time, the influence of water salt migration, the external temperature and the external humidity on the salt corrosion damage of the porous medium material under the conditions of dry-wet alternation and temperature change can be analyzed, the mechanism of the salt corrosion damage of the porous medium material is further obtained, the technical support is provided for further elucidating the research of the salt corrosion damage mechanism of the sample under the conditions of certain temperature and humidity, and the theoretical basis is provided for the durability design of the porous medium material structure;
2. the temperature and humidity control system can automatically adjust the temperature and the dryness and humidity in the temperature control box according to the conditions given by the electronic computer, can simulate the environmental conditions of the salt corrosion damage of the porous medium material more truly, fully considers the influence of external environmental factors on the salt corrosion damage of the porous medium material, and is favorable for exploring the internal mechanism of the salt corrosion damage of the porous medium material;
3. the digital acquisition system records the first flowmeter, can detect the water supplementing condition of the test sample in real time, and enables analysis of water salt migration under real-time conditions and analysis of the influence of the water salt migration on the corrosion damage of the test sample to be possible;
4. according to the application, the high-resolution camera arranged on the Wen Xiangding part can be used for more clearly observing the state change of salt corrosion damage of the sample by recording the image data of the salt corrosion damage process on the surface of the sample;
5. the salt sensor can accurately detect the real-time salt distribution condition in the sample, more accurately observe the salt migration condition in the sample, and provide accurate and scientific data for researches on the salt migration path and the salt migration characteristics of the sample, the influence of the salt migration on the salt corrosion damage of the sample and the like;
6. the brightness and the heat dissipation of the radiant lamp arranged on the Wen Xiangding part can be adjusted through a program, so that the water evaporation on the surface of the sample can be increased, and the migration intensity of water and salt can be accelerated; the mounted adjustable cold light source shadowless lamp can not emit heat from the cold light source and can not influence the experimental environment in the temperature control box; the influence of shadows of objects (such as data lines) around the high-resolution camera on image data is eliminated;
7. the cuboid sample box is composed of transparent organic glass, the preparation condition of the sample can be conveniently observed during sample preparation, the deformation condition of the test sample can be conveniently observed during test, and the organic glass has the characteristics of difficult deformation, difficult rust, convenient cleaning and the like, and is suitable for being used as the test sample box.
Drawings
FIG. 1 is a schematic diagram of the structure of the present application;
FIG. 2 is a schematic view of the structure of a rectangular parallelepiped sample box according to the present application;
FIG. 3 is a schematic diagram showing the connection of a rectangular sample box and a fixed bracket according to the present application;
in the figure: 1-probe hole, 2-cuboid sample box, 3-permeable stone, 4-aqueduct, 5-spray humidifier, 6-high resolution camera, 7-shadowless lamp, 8-digital acquisition system, 9-first flowmeter, 10-Ma Liaote bottle, 11-protective housing, 12-temperature and humidity controller, 13-electronic computer, 14-valve, 15-temperature control box, 16-heater, 17-refrigeration compressor, 18-ventilation pipeline, 19-filter paper, 20-test sample, 21-water level adjusting tube, 22-sealing ring, 23-fixed bracket, 24-weighing device, 25-radiation lamp, 26-support, 27-support base plate, 28-through hole, 29-second flowmeter, 30-fixed knob.
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which is to be read in light of the specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the application to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the application, are not intended to be critical to the essential characteristics of the application, but are intended to fall within the spirit and scope of the application. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the application, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the application may be practiced.
Referring to fig. 1 to 3, the present application provides a technical solution: a simulated porous medium material salt corrosion damage test device and method comprises a water supplementing system, a temperature and humidity control system, a digital acquisition system 8, a salt sensor, a weighing device 24 and a temperature control box 15;
the temperature control box 15 is internally provided with a test sample 20, and the test sample 20 is internally provided with a plurality of salt sensors, so that the salt distribution condition of each layer of sample in the test sample box can be effectively, conveniently and fully detected in real time;
the temperature and humidity control system is communicated with the temperature control box 15;
the weighing device 24 is placed right below the test sample 20, and the quality change of the salt corrosion damage of the test sample 20 is recorded in real time;
the salinity sensor, the water replenishing system and the weighing device 24 are electrically connected with the digital acquisition system 8;
the water supplementing system conveys liquid to the bottom of the test sample 20, the temperature and humidity control system controls the temperature and humidity in the temperature control box 15 in real time, so that the actual salt corrosion damage process of the porous medium material under the conditions of alternation of dryness and humidity and temperature change is simulated, and the real-time detection and analysis of the water salt migration rule, the quality change of the sample and the surface layer damage state of the sample in the salt corrosion damage process are realized through the real-time salt distribution, the water absorption condition, the quality change rate and the state change of the salt corrosion damage of the porous medium material.
The bottom of the temperature control box 15 is provided with a support 26, the top end of the support 26 is provided with a support bottom plate 27, the support bottom plate 27 is provided with two through holes 28, the through holes 28 are communicated with a water supplementing system, the periphery of the support bottom plate 27 is connected with a fixing support 23 (in threaded connection with the fixing support and the support bottom plate), a circle of groove is formed in the inner wall of the bottom of the fixing support 23, a sealing ring 22 is arranged in the groove, a cuboid sample box 2 is arranged in the fixing support 23, the fixing support 23 and the cuboid sample box 2 are sealed through the sealing ring 22 (the sealing ring 22 is in contact with the bottom surface of the cuboid sample box 2), the top end of the fixing support 23 is in threaded connection with a fixing knob 30, the cuboid sample box 2 is fixed in the fixing support 23 (the cuboid sample box 2 can be detached, a cuboid sample can be taken out independently during each test, test sample preparation, compaction and sample disassembly are convenient), the cuboid sample box 2 is a cuboid with an upper opening and a lower opening, the test sample 20 is arranged in the cuboid sample box 2, a plurality of probe holes 1 are arranged on the side wall of the cuboid sample box 2 at equal intervals from bottom to top, and the salt sensor is arranged in the probe holes 1;
the support 26 enables the test sample 20 to be supported in the temperature control box 15, so as to meet test requirements; the fixed bracket 23 is used for fixing the cuboid sample box 2; the support base plate 27 provides supporting force for the cuboid sample box 2; the stability of the test device is ensured, and the test is convenient;
the water permeable stone 3 and the filter paper 19 are paved on the support bottom plate 27 in the temperature control box 15 from bottom to top, and the test sample 20 is contacted with the filter paper 19, so that uniform water supplementing to the test sample 20 is ensured.
The water supplementing system comprises a Ma Liaote bottle 10, a water guide pipe 4 and a water level regulating pipe 21;
the Ma Liaote bottle 10 is arranged outside the temperature control box 15, the Ma Liaote bottle 10 is communicated with one through hole 28 on the support base plate 27 through the water guide pipe 4 and is used for supplementing water to a test sample, and the other through hole 28 is connected with the water level regulating pipe 21 and is used for regulating water pressure;
the water guide pipe 4 is provided with a first flowmeter 9 and a valve 14, the first flowmeter 9 is electrically connected with the digital acquisition system 8, and the first flowmeter 9 accurately records the water supplementing condition of the test sample.
The temperature and humidity control system comprises a temperature and humidity controller 12, a heater 16, a refrigeration compressor 17, a ventilation pipeline 18 and a spray humidifier 5;
the spray humidifier 5 is provided with a second flowmeter 29, the heater 16 and the refrigeration compressor 17 are electrically connected with the temperature and humidity controller 12, and the heater 16 and the refrigeration compressor 17 are provided with a protective shell 11;
the spray humidifier 5 is arranged in the temperature control box 15, the heater 16 and the refrigeration compressor 17 are arranged outside the temperature control box 15, and the heater 16 and the refrigeration compressor 17 are communicated to the inside of the temperature control box 15 through a ventilation pipeline 18;
a heater 16 for adjusting the temperature in the temperature control box and increasing the temperature in the temperature control box; a refrigeration compressor 17 for adjusting the temperature in the temperature control box and reducing the temperature in the temperature control box; a spray humidifier 5 for performing humidity adjustment in the temperature control box 15; the temperature and humidity controller 12 detects and controls the temperature and humidity in the temperature control box 15 in real time, overall adjusts the test environment, and can more accurately analyze the salt corrosion damage mechanism under different test conditions; a ventilation line 18 for blowing cold/hot air into the temperature control box 15 to adjust the temperature in the temperature control box, and for evaporating the hot air flow to adjust the humidity in the temperature control box; a temperature control box 15 for maintaining the humidity and temperature of the test.
The application also includes an electronic computer 13;
the digital acquisition system 8 and the temperature and humidity controller 12 are electrically connected with the electronic computer 13.
The application also comprises a high-resolution camera 6 and a shadowless lamp 7, wherein the high-resolution camera 6 is provided with a high-definition lens, the high-resolution camera 6 and the shadowless lamp 7 are arranged at the top of the temperature control box 15, the shadowless lamp 7 is a light source adjustable cold light source, the high-resolution camera 6 is used for recording the salt corrosion damage process of the surface test sample 20 in the test time, the shadowless lamp 7 is an adjustable cold light source, the cold light source can not emit heat, the experimental environment in the temperature control box can not be influenced, and the influence of shadows of objects such as data wires around the high-resolution camera on image data is eliminated.
The application also comprises a radiation lamp 25, wherein the radiation lamp 25 is arranged at the top of the temperature control box 15 and is electrically connected with the electronic computer 13, and the electronic computer 13 controls and regulates the brightness and the heat dissipation of the radiation lamp 25, thereby being beneficial to increasing the water evaporation on the surface of the test sample 20 and accelerating the migration intensity of water and salt.
The cuboid sample box 2 adopts organic glass to make, and cuboid sample box 2 is used for holding test sample 20, and it is transparent structure, and the preparation condition of test sample 20 is convenient for observe in the time of the system appearance, the deformation condition of test sample 20 that can be convenient during the test to organic glass has difficult deformation, difficult emergence corrosion, characteristics such as being convenient for wash.
The digital acquisition system 8 is used for monitoring the temperature and the water content in the temperature control box 15, recording the state change (image data) of salt corrosion damage of the sample fed back by the high-resolution camera 6 along with the water salt migration process, real-time salt distribution in the detection sample fed back by the salt sensor, the water supplementing condition of the test sample fed back by the first flowmeter 9, the damage process of the surface layer sample fed back by the weighing device 24 along with the test and the quality change of the test sample 20, namely the digital acquisition system 8, the digital acquisition system 8 acquires the temperature, the humidity and the external water supplementing quantity in the test environment, detects the real-time salt distribution of the sample, and the damage process of the surface layer sample along with the test and the quality change of the test sample;
the support 26, the support bottom plate 27 and the fixed support 23 are all made of stainless steel, so that the salt solution corrosion resistance is good, and the salt sensor, the valve 14 and the electrically connected wires are made of materials with better corrosion resistance.
The test specimen 20 falls onto the weighing device 24 as the peeled surface specimen is broken by the salt corrosion, so that the weighing device 24 records the mass change of the test specimen 20 in real time.
A salt corrosion damage test method for simulating a porous medium material is characterized in that a test sample 20 is arranged in a cuboid sample box 2 after preparation, the cuboid sample box 2 is fixed on a fixed support 23, a water supplementing system supplements liquid for the test sample 20 for test, meanwhile, a temperature and humidity control system controls the temperature and humidity in a temperature control box 15 in the test process, so that the actual salt corrosion damage process of the porous medium material under the conditions of dry-wet alternation and temperature change is simulated, and a digital acquisition system 8 acquires the salt distribution, the water absorption condition, the mass change rate and the state change of salt corrosion damage of the test sample 20 in real time.
Preparation of test specimen 20: taking out a proper amount of undisturbed sample on a porous medium material structure to be tested, and measuring the physical and mechanical indexes of the test sample 20 by using a test instrument; taking out a test sample 20 with a proper volume from a porous medium material structure, putting the test sample 20 into a cuboid sample box 2, wherein the test sample 20 is required to be attached to the inner wall of the cuboid sample box 2 and is leveled with the upper surface of the cuboid sample box 2, so that the expansion phenomenon of the test sample 20 can be more obviously observed when the salt corrosion of the sample is destroyed;
the cuboid sample box 2 with the test sample 20 is placed in the temperature control box 15, and the cuboid sample box 2 is fixed on the support base plate 27 by the fixing support 23;
after the cuboid sample box 2 is fixed, a valve 14 and a first flowmeter 9 on the water guide pipe 4 are opened, and the water supplementing condition of the test sample is recorded;
the salt sensor is inserted into the probe hole 1 on the side wall of the cuboid sample box 2, and the shadowless lamp 7, the high-resolution camera 6, the digital acquisition system 8 and the weighing device 24 are turned on; the temperature and humidity controller 12 is opened, a temperature and humidity control program is set by the electronic computer 13, and the temperature, humidity, temperature rising/reducing speed, operation time of the temperature and humidity controller 12 and the like under the initial condition of the experiment are set;
in the test process, the information acquired by the digital acquisition system 8 is transmitted into a computer, and the detection software in the computer can realize the control of the digital acquisition system 8, namely the sampling frequency, the data storage format, the output format and the like; the temperature and humidity detected by the digital acquisition system 8 can truly record the actual experimental environment;
after the test is finished, the cuboid sample box 2 is removed, the test sample 20 is taken out, the test sample 20 is cut from one end of the test sample 20 in layers according to the standard requirement of geotechnical test procedure, the water content and the conductivity of each layer are measured, and the conditions of salt corrosion damage moisture and salt migration under certain temperature and humidity are studied.
The above embodiments are merely illustrative of the principles of the present application and its effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the application. Accordingly, it is intended that all equivalent modifications and variations of the application be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (8)
1. A test method for simulating a salt corrosion damage test device of a porous dielectric material is characterized by comprising the following steps of: the salt corrosion damage test device for the simulated porous medium material comprises a water supplementing system, a temperature and humidity control system, a digital acquisition system (8), a salt sensor, a weighing device (24) and a temperature control box (15);
a test sample (20) is placed in the temperature control box (15), and a plurality of salt sensors are arranged in the test sample (20);
the temperature and humidity control system is communicated with the temperature control box (15);
the weighing device (24) is arranged right below the test sample (20);
the salinity sensor, the water supplementing system and the weighing device (24) are electrically connected with the digital acquisition system (8);
the water supplementing system conveys liquid to the bottom of a test sample (20), and the temperature and humidity control system controls the temperature and humidity in the temperature control box (15) in real time, so that the actual salt corrosion damage process of a porous medium material under the conditions of dry-wet alternation and temperature change is simulated, and the real-time salt migration rule of the water salt, the quality change of the sample and the surface layer damage state of the sample in the salt corrosion damage process are detected and analyzed through the real-time salt distribution, the water absorption condition, the quality change rate and the state change of the salt corrosion damage of the porous medium material;
the bottom of the temperature control box (15) is provided with a support (26), the top end of the support (26) is provided with a support bottom plate (27), two through holes (28) are formed in the support bottom plate (27), the through holes (28) are communicated with a water supplementing system, the periphery of the support bottom plate (27) is connected with a fixing support (23), a circle of groove is formed in the inner wall of the bottom of the fixing support (23), a sealing ring (22) is arranged in the groove, a cuboid sample box (2) is arranged in the fixing support (23), the fixing support (23) is sealed with the cuboid sample box (2) through the sealing ring (22), the cuboid sample box (2) is a cuboid with upper opening and lower opening, a test sample (20) is arranged in the cuboid sample box (2), a plurality of probe holes (1) are formed in the side wall of the cuboid sample box (2) from bottom to top at equal intervals, and the salt sensor is arranged in the probe holes (1);
when the test sample (20) is prepared, the test sample (20) is attached to the inner wall of the cuboid sample box (2) and is leveled with the upper surface of the cuboid sample box (2), so that the expansion phenomenon of the test sample (20) during salt corrosion damage can be observed;
the test sample (20) is arranged in the cuboid sample box (2) after preparation, the cuboid sample box (2) is fixed on the fixed support (23), the water supplementing system supplements liquid for the test sample (20) for test, meanwhile, the temperature and humidity in the temperature control box (15) are controlled by the temperature and humidity control system in the test process, so that the actual salt corrosion damage process of a porous medium material under the condition of dry-wet alternation and temperature change is simulated, the surface layer sample peeled off by the salt corrosion damage of the test sample (20) falls on the weighing device (24), the weighing device (24) records the quality change of the test sample (20) in real time, and the digital acquisition system (8) acquires the salt distribution, the water absorption condition, the quality change rate and the state change of the salt corrosion damage of the test sample (20) in real time.
2. The test method for simulating a salt corrosion damage test apparatus for porous dielectric materials according to claim 1, wherein: the permeable stone (3) and the filter paper (19) are paved on the support bottom plate (27) in the temperature control box (15) from bottom to top, and the test sample (20) is contacted with the filter paper (19).
3. The test method for simulating a salt corrosion damage test apparatus for porous dielectric materials according to claim 2, wherein: the water replenishing system comprises a Ma Liaote bottle (10), a water guide pipe (4) and a water level regulating pipe (21);
the Ma Liaote bottle (10) is arranged outside the temperature control box (15), the Ma Liaote bottle (10) is communicated with one through hole (28) on the support base plate (27) through the water guide pipe (4), and the other through hole (28) is connected with the water level regulating pipe (21);
the water guide pipe (4) is provided with a first flowmeter (9) and a valve (14), and the first flowmeter (9) is electrically connected with the digital acquisition system (8).
4. A test method for simulating a salt corrosion damage test apparatus for porous dielectric materials according to claim 3, wherein: the temperature and humidity control system comprises a temperature and humidity controller (12), a heater (16), a refrigeration compressor (17), a ventilation pipeline (18) and a spray humidifier (5);
the spray humidifier (5) is provided with a second flowmeter (29), and the second flowmeter (29), the heater (16) and the refrigeration compressor (17) are electrically connected with the temperature and humidity controller (12);
the spray humidifier (5) is arranged in the temperature control box (15), the heater (16) and the refrigeration compressor (17) are arranged outside the temperature control box (15), and the heater (16) and the refrigeration compressor (17) are communicated to the inside of the temperature control box (15) through a ventilation pipeline (18).
5. The test method for simulating a salt corrosion damage test apparatus for porous dielectric materials according to claim 4, wherein: also comprises an electronic computer (13);
the digital acquisition system (8) and the temperature and humidity controller (12) are electrically connected with the electronic computer (13).
6. The test method for simulating a salt corrosion damage test apparatus for porous dielectric materials according to claim 5, wherein: the high-resolution camera (6) and the shadowless lamp (7) are arranged at the top of the temperature control box (15), and the shadowless lamp (7) is a cold light source with an adjustable light source.
7. The test method for simulating a salt corrosion damage test apparatus for porous dielectric materials according to claim 6, wherein: the temperature control box also comprises a radiation lamp (25), wherein the radiation lamp (25) is arranged at the top of the temperature control box (15) and is electrically connected with the electronic computer (13).
8. The test method for simulating a salt corrosion damage test apparatus for porous dielectric materials of claim 7, wherein: the cuboid sample box (2) is made of organic glass.
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