CN111189765A - Multi-source corrosion acoustic emission experiment testing device for storage tank bottom plate - Google Patents
Multi-source corrosion acoustic emission experiment testing device for storage tank bottom plate Download PDFInfo
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- CN111189765A CN111189765A CN201811350808.7A CN201811350808A CN111189765A CN 111189765 A CN111189765 A CN 111189765A CN 201811350808 A CN201811350808 A CN 201811350808A CN 111189765 A CN111189765 A CN 111189765A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 103
- 238000005260 corrosion Methods 0.000 title claims abstract description 103
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000002474 experimental method Methods 0.000 title claims abstract description 10
- 238000004088 simulation Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 13
- 239000011521 glass Substances 0.000 claims abstract description 12
- 239000002932 luster Substances 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000004458 analytical method Methods 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 239000007822 coupling agent Substances 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 4
- 229920005372 Plexiglas® Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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Abstract
The invention discloses a multi-source corrosion acoustic emission experiment testing device for a storage tank bottom plate, and particularly relates to the technical field of storage tank corrosion monitoring and detection. The device simulates the complicated corrosion defect state of the bottom plate of the storage tank by placing corrosion sources in different states in the simulation storage tank, utilizes the electrochemical workstation to control the activity degree of the simulation corrosion sources, and collects acoustic emission signals under different conditions for analysis. The device comprises a simulation storage tank, a simulation corrosion source, an acoustic emission detection system and an electrochemical control system, wherein an acoustic sensor is arranged on a tank bottom edge plate of the simulation storage tank and is electrically connected with the acoustic emission detection system; the bottom plate of the simulation storage tank is covered with the anticorrosive coating except the reserved metal luster circular area, a simulation corrosion source is tightly coupled in each metal luster circular area, one surface of each simulation corrosion source is connected with an organic glass pipe, a space enclosed by the simulation corrosion source and the organic glass pipe is filled with a corrosion solution, each simulation corrosion source is provided with an electrode, and the electrodes are connected with the electrochemical workstation.
Description
Technical Field
The invention relates to the technical field of storage tank corrosion monitoring and detection, in particular to a multi-source corrosion acoustic emission experiment testing device for a storage tank bottom plate.
Background
The acoustic emission is a technology for realizing the online detection of the bottom plate of the storage tank without opening the tank and stopping production. The method for testing the corrosion acoustic emission of the bottom plate of the storage tank is characterized in that a certain number of sensors are uniformly distributed on the outer wall of the storage tank close to the bottom plate and are connected to an acoustic emission instrument through coaxial cables. The anticorrosive coating that the liquid injection or washing caused the local washing of storage tank bottom plate drops among the production process, overhauls clear jar and polishes the anticorrosive coating and spray the position again and drop, and the ground subsides and leads to the anticorrosive coating fracture, is the main region of storage tank bottom plate corruption, consequently shows as many sound sources state. Meanwhile, during tank opening inspection, the corrosion of the bottom plate of the storage tank is not uniform, but corrosion pits appear in local areas, and more sound sources and complex states exist in the corrosion process. Different corrosion sources have different corrosion types and different corrosion activities. In order to more accurately evaluate the corrosion state of the storage tank bottom plate by applying an acoustic emission technology, the research on the storage tank bottom plate multi-corrosion-source acoustic emission test analysis method is of great significance.
Disclosure of Invention
The invention aims to provide a multi-source corrosion acoustic emission experimental testing device for a storage tank bottom plate, which can more accurately evaluate the corrosion state of the storage tank bottom plate, aiming at the problem that the acoustic emission detection is complex and has more sound sources in the corrosion process of the storage tank bottom plate.
The invention specifically adopts the following technical scheme:
the multi-source corrosion acoustic emission experiment testing device for the bottom plate of the storage tank comprises a simulation storage tank, an acoustic emission detection system, an electrochemical control system and a simulation corrosion source, wherein a pure water solution is contained in the simulation storage tank, an acoustic sensor is arranged at the edge plate of the bottom of the tank, and the acoustic sensor is electrically connected with the acoustic emission detection system; the bottom plate of the simulation storage tank is covered with an anticorrosive coating except the reserved metal luster circular area, a simulation corrosion source is tightly coupled in each metal luster circular area, one surface of the simulation corrosion source is connected with an organic glass tube, a space enclosed by the simulation corrosion source and the organic glass tube is filled with a corrosive solution, an electrode is mounted on each simulation corrosion source and is connected with an electrochemical workstation, and the electrochemical workstation is controlled through an electrochemical control system.
Preferably, each acoustic sensor is internally provided with an acquisition card, a data acquisition module, a central processing unit and a wireless communication module are integrated on the acquisition card, the data acquisition module is respectively connected with the central processing unit, and the central processing unit is electrically connected with the acoustic emission detection system.
Preferably, the simulated corrosion source is polished until the surface meets the roughness requirement of a corrosion test, is washed by distilled water, is rinsed by water and ethanol, is dried by cold air, and is placed in a drying container.
Preferably, the plexiglas tube is cylindrical.
Preferably, the level of the neat aqueous solution is below the height of the plexiglas tube.
Preferably, the sound sensor is tightly attached to the tank bottom edge plate through a coupling agent.
Preferably, the electrochemical workstation controls the activity degree of the simulated corrosion source, and acquires acoustic emission signals under different conditions for processing and analysis by controlling the state of the simulated corrosion source, wherein,
different corrosion media with the same concentration are contained in the simulated corrosion source, and different types of corrosion are simulated;
the simulated corrosion source is filled with the same corrosion medium with different concentrations, and corrosion with different activity degrees is simulated;
different corrosive mediums with different concentrations are contained, and the complex corrosion state of the storage tank bottom plate is simulated.
The invention has the following beneficial effects:
the multi-source corrosion acoustic emission experiment testing device for the storage tank bottom plate simulates the complex corrosion defect multi-source state of the storage tank bottom plate by placing corrosion sources in different states in the storage tank, controls the activity degree of the simulated corrosion sources by using an electrochemical workstation, and acquires acoustic emission signals under different conditions by controlling the states of the simulated corrosion sources for processing and analysis; the method can simulate the complicated defect state of the storage tank bottom plate, form corrosion states with different corrosion types and different activity degrees, and correspond the corrosion process with the acoustic test process, thereby obtaining acoustic characteristic signals and providing basis for multi-source corrosion acoustic emission analysis and evaluation.
Drawings
FIG. 1 is a schematic diagram of a multi-source corrosion acoustic emission experiment testing device for a storage tank bottom plate;
FIG. 2 is a schematic view of a simulated corrosion source.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1 and 2, the multi-source corrosion acoustic emission experiment testing device for the bottom plate of the storage tank comprises a simulation storage tank, an acoustic emission detection system, an electrochemical control system and a simulation corrosion source, wherein the simulation storage tank is made of a Q235B low-carbon steel material, the specific size is D600 mm, H700 mm and the thickness of the bottom plate is 4mm, pure water solution is contained in the simulation storage tank, an acoustic sensor is arranged at the bottom edge plate of the simulation storage tank, the acoustic sensor is tightly attached to the bottom edge plate through a coupling agent, and the acoustic sensor is electrically connected with the acoustic emission detection system; d-31 epoxy/polyurethane primer is uniformly sprayed on a bottom plate of the simulation storage tank except a reserved metal luster circular area and is covered with an anticorrosive coating, the diameter of the metal luster circular area is 36mm, a simulation corrosion source is installed in each circular area of the simulation storage tank, an organic glass pipe is connected to one surface of the simulation corrosion source, a corrosion solution is contained in a space surrounded by the simulation corrosion source and the organic glass pipe, the liquid level of a pure water solution is lower than the height of the organic glass pipe, the organic glass pipe is cylindrical, the outer diameter of the simulation storage tank is D40 multiplied by 2, the length of the simulation corrosion source is 450mm, electrodes are installed on each simulation corrosion source and are connected with an electrochemical workstation, and the electrochemical workstation is controlled through an electrochemical control system.
Each acoustic sensor is internally provided with an acquisition card, a data acquisition module, a central processing unit and a wireless communication module are integrated on the acquisition card, the data acquisition module and the data acquisition module are respectively connected with the central processing unit, and the central processing unit is electrically connected with an acoustic emission detection system.
A simulated corrosion source is a Q235B low-carbon steel plate with the thickness of 50mm multiplied by 2mm, the surface of the low-carbon steel plate is continuously polished by 1200-mesh abrasive paper until the surface meets the roughness requirement of a corrosion test, the low-carbon steel plate is cleaned by distilled water, rinsed by water and ethanol, dried by cold air and placed in a drying container.
The electrochemical workstation controls the activity degree of the simulated corrosion source, collects acoustic emission signals under different conditions by controlling the state of the simulated corrosion source, processes and analyzes, wherein,
different corrosion media with the same concentration are contained in the simulated corrosion source, and different types of corrosion are simulated;
the simulated corrosion source is filled with the same corrosion medium with different concentrations, and corrosion with different activity degrees is simulated;
different corrosive mediums with different concentrations are contained, and the complex corrosion state of the storage tank bottom plate is simulated.
The experimental test device can simulate the multi-source corrosion state of the storage tank bottom plate, and can respectively and independently generate corrosion of different types and different activity degrees; and the same type corrosion, different types of corrosion, the same activity degree and different activity degrees of corrosion can be generated simultaneously, and the corrosion process corresponds to the acoustic test process, so that an acoustic characteristic signal is obtained, and a basis is provided for the analysis and evaluation of the acoustic emission of the multi-source corrosion.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (7)
1. The multi-source corrosion acoustic emission experiment testing device for the bottom plate of the storage tank is characterized by comprising a simulation storage tank, an acoustic emission detection system, an electrochemical control system and a simulation corrosion source, wherein the simulation storage tank is filled with a purified water solution, and an acoustic sensor is arranged at the edge plate of the bottom of the tank and is electrically connected with the acoustic emission detection system; the bottom plate of the simulation storage tank is covered with an anticorrosive coating except the reserved metal luster circular area, a simulation corrosion source is tightly coupled in each metal luster circular area, one surface of the simulation corrosion source is connected with an organic glass tube, a space enclosed by the simulation corrosion source and the organic glass tube is filled with a corrosive solution, an electrode is mounted on each simulation corrosion source and is connected with an electrochemical workstation, and the electrochemical workstation is controlled through an electrochemical control system.
2. The multi-source corrosion acoustic emission experimental testing device of the storage tank bottom plate of claim 1, wherein each acoustic sensor is internally provided with an acquisition card, a data acquisition module, a central processing unit and a wireless communication module are integrated on the acquisition card, the data acquisition module is connected with the central processing unit, and the central processing unit is electrically connected with the acoustic emission detection system.
3. The multi-source corrosion acoustic emission experiment testing device of the storage tank bottom plate of claim 1, wherein the simulated corrosion source is polished until the surface meets the roughness requirement of a corrosion test, is cleaned by distilled water, rinsed by water and ethanol, dried by cold air, and placed in a drying container.
4. The multi-source corrosion acoustic emission experimental testing device of the storage tank bottom plate of claim 1, wherein the organic glass tube is cylindrical.
5. The multi-source corrosion acoustic emission experimental testing device of the storage tank bottom plate of claim 1, wherein the liquid level of the purified water solution is lower than the height of the organic glass tube.
6. The multi-source corrosion acoustic emission experimental testing device of the storage tank bottom plate of claim 1, wherein the acoustic sensor is closely attached to the tank bottom edge plate through a coupling agent.
7. The multi-source corrosion acoustic emission experimental testing device for the storage tank bottom plate according to claim 1, wherein the electrochemical workstation controls the activity degree of the simulated corrosion source, collects acoustic emission signals under different conditions for processing and analysis by controlling the state of the simulated corrosion source, wherein,
different corrosion media with the same concentration are contained in the simulated corrosion source, and different types of corrosion are simulated;
the simulated corrosion source is filled with the same corrosion medium with different concentrations, and corrosion with different activity degrees is simulated;
different corrosive mediums with different concentrations are contained, and the complex corrosion state of the storage tank bottom plate is simulated.
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| CN201811350808.7A CN111189765A (en) | 2018-11-14 | 2018-11-14 | Multi-source corrosion acoustic emission experiment testing device for storage tank bottom plate |
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| CN201811350808.7A CN111189765A (en) | 2018-11-14 | 2018-11-14 | Multi-source corrosion acoustic emission experiment testing device for storage tank bottom plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986124A (en) * | 2021-05-14 | 2021-06-18 | 湖南大学 | Real-time evaluation device and method for simulating deep environment erosion and material performance degradation |
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Application publication date: 20200522 |