CN111189766A - Petrochemical equipment corrosion source active and passive dynamic acoustic fusion experimental testing device - Google Patents
Petrochemical equipment corrosion source active and passive dynamic acoustic fusion experimental testing device Download PDFInfo
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- CN111189766A CN111189766A CN201811350810.4A CN201811350810A CN111189766A CN 111189766 A CN111189766 A CN 111189766A CN 201811350810 A CN201811350810 A CN 201811350810A CN 111189766 A CN111189766 A CN 111189766A
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- 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 petrochemical equipment corrosion source active and passive acoustics fusion experiment testing device, and particularly relates to the technical field of corrosion monitoring and detection of petrochemical equipment. The petrochemical equipment corrosion source active and passive acoustic fusion experimental testing device comprises a simulated corrosion source, an electrochemical workstation, an active and passive acoustic fusion detection system and an electrochemical control system. And (3) continuously polishing the simulated corrosion source by using 1200-mesh abrasive paper until the surface meets the roughness requirement of a corrosion test, rinsing by using distilled water and then by using water and ethanol, drying by using cold air, and placing in a drying container. The surface of one side of a simulated corrosion source is provided with a corrosion pit defect, the side is connected with an organic glass tube, a space enclosed by the surface and the organic glass tube is filled with a corrosive solution, an acoustic sensor is arranged on the simulated corrosion source, the acoustic sensor and the simulated corrosion source are tightly attached through a coupling agent, the acoustic sensor is connected with an active and passive acoustic fusion detection system, the simulated corrosion source is connected with an electrode system, and the electrode is connected with an electrochemical workstation.
Description
Technical Field
The invention relates to the technical field of corrosion monitoring and detection of petrochemical equipment, in particular to a petrochemical equipment corrosion source active and passive acoustic fusion experimental testing device.
Background
Ultrasonic guided wave and acoustic emission in the prior art are technologies capable of realizing non-stop online detection of petrochemical equipment such as storage tanks, pipelines, containers and towers. The ultrasonic guided wave system can only detect the position of a corrosion defect formed on equipment, but cannot obtain the size of the defect, and the acoustic emission system can only detect the corrosion activity of the equipment, namely the activity degree of the part which is being corroded. The formed defects are not always corroded, and the corroded part is not always small in residual thickness. The problem of incomplete evaluation results can occur when the ultrasonic guided wave and the acoustic emission system are respectively utilized to carry out online detection on the equipment. In addition, the ultrasonic guided wave technology requires point-by-point detection of the sensor, and therefore has limitations such as low detection efficiency and small detection coverage due to acoustic attenuation.
Disclosure of Invention
Aiming at the defects, the invention provides an active and passive acoustic fusion experimental test device for the corrosion source of the petrochemical equipment, and the experimental device can simulate different states of the corrosion source of the petrochemical equipment to obtain corresponding active and passive acoustic characteristics, form an active and passive acoustic fusion identification technology for the corrosion source of the petrochemical equipment and establish the relationship between defect characteristics of the corrosion source of the petrochemical equipment under different conditions and state signals representing the corrosion source of the petrochemical equipment. The limit that the existing acoustic detection technology depends on the current state of the defects such as corrosion damage and the like is broken through, so that the full-time-domain state monitoring of the corrosion defect of petrochemical equipment is realized.
The invention specifically adopts the following technical scheme:
the petrochemical equipment corrosion source active-passive acoustic fusion experimental testing device comprises a simulated corrosion source, an electrochemical workstation, an active-passive acoustic fusion detection system and an electrochemical control system, wherein a corrosion pit defect is arranged on the surface of one side of the simulated corrosion source, the side surface of the simulated corrosion source is connected with an organic glass tube, a corrosion solution is contained in a space enclosed by the surface and the organic glass tube, an acoustic sensor is arranged on the simulated corrosion source, the acoustic sensor is connected with the active-passive acoustic fusion detection system, the simulated corrosion source is connected with an electrode system, and the electrode system is connected with the electrochemical workstation;
2. preferably, the activity degree of the simulated corrosion source is controlled by the electrochemical workstation, and the active and passive acoustic fusion detection system and the electrochemical control system monitor the activity degree of the simulated corrosion source, (1) the simulated corrosion source is at a cathode polarization potential under the control of the electrochemical workstation, and no corrosion occurs, so that an active acoustic excitation modulation signal with defect modulation is obtained; (2) the simulated corrosion source is under the control of the electrochemical workstation at the anode polarization potential, corrosion occurs, but an active acoustic signal can not be excited, and only a passive acoustic emission signal formed by corrosion is collected; (3) the simulation corrosion source is under the control of an electrochemical workstation at an anodic polarization potential, the corrosion source is corroded, a fusion signal of an active acoustic excitation modulation signal with defect modulation and a passive acoustic emission signal formed by corrosion is collected, the passive acoustic emission signal emitted from a corrosion part begins to be corroded, the corrosion activity can be adjusted, active and passive acoustic signals in different corrosion states are obtained, the collected signals are analyzed, the relation between the defect characteristics and the state signal representing the defect characteristics in different conditions is established, and the defect identification method is formed.
Preferably, an acquisition card is arranged in the acoustic sensor, an active acoustic excitation module, a data acquisition module and a central processing unit are integrated on the acquisition card, the active acoustic excitation module and the data acquisition module are respectively connected with the central processing unit, and the central processing unit is connected with the active and passive acoustic fusion detection system.
Preferably, the acoustic sensor is configured for receiving an active acoustic excitation modulation signal and a passive acoustic emission signal; wherein:
the active acoustic excitation modulation signal is obtained by triggering a sensor after active acoustic excitation waves are modulated by the corrosion pit defects of the simulated corrosion source test piece;
the passive acoustic emission signal is obtained by a passive acoustic emission wave trigger sensor which is used for simulating the corrosion pit defect of the corrosion source test piece.
Preferably, the data acquisition module is configured to acquire the active acoustic excitation modulation signal and the passive acoustic emission signal received via the acoustic sensor, and then send the acquired signals to the central processing unit after digital processing.
Preferably, the central processing unit is configured to control the active acoustic excitation module and the data acquisition module, and simultaneously process the signals to obtain defect information data, and then transmit the corresponding defect information data to the active and passive acoustic fusion detection system.
Preferably, the simulated corrosion source is continuously polished by using a polishing material until the surface meets the roughness requirement of a corrosion test, is washed by using distilled water, is rinsed by using water and ethanol, is dried by cold air, and is placed in a drying container.
Preferably, the acoustic sensor is tightly attached to the simulated corrosion source through a coupling agent.
Preferably, the simulated corrosion source is made of low-carbon steel material.
Preferably, the petrochemical plant is a tank, a pipeline, a vessel, or a tower.
The invention has the following beneficial effects:
the method comprises the steps of presetting a certain degree of defects on the surface of a simulated corrosion source, simulating corrosion damage of equipment to form a corrosion source, controlling the activity degree of the simulated corrosion source by using an electrochemical workstation, collecting active and passive acoustic signals under different conditions by controlling the state of the simulated corrosion source, processing and analyzing the signals, and identifying the state of the corrosion source; the complex defect state of petrochemical equipment can be simulated, defects in different states are formed, response data are obtained, and an effective active and passive acoustic fusion detection method for corrosion damage of the equipment is established.
Drawings
FIG. 1 is a schematic structural diagram of a petrochemical equipment corrosion source active and passive acoustic fusion experimental testing device;
FIG. 2 is a schematic view of a simulated corrosion source for simulating corrosion.
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 fig. 2, the active and passive acoustic fusion experimental testing device for corrosion sources of petrochemical equipment (the petrochemical equipment is a storage tank or a pipeline or other corrosion-prone equipment in the petrochemical field) comprises a simulated corrosion source, an electrochemical workstation, an active and passive acoustic fusion detection system and an electrochemical control system, wherein the simulated corrosion source is made of Q235B low-carbon steel materials which are commonly used materials for petrochemical equipment, 1200-mesh abrasive paper is adopted for continuously polishing until the surface meets the roughness requirement of a corrosion test, distilled water is adopted for cleaning, then the surface is rinsed by water and ethanol, cold air is dried, and the device is placed in a drying container. The corrosion pit defect is arranged on the surface of one side of the simulated corrosion source, the side surface of the simulated corrosion source is connected with the organic glass tube, a corrosion solution is contained in a space enclosed by the surface and the organic glass tube, the acoustic sensor is arranged on the simulated corrosion source, the acoustic sensor and the simulated corrosion source are tightly attached through a coupling agent, the acoustic sensor is connected with the active and passive acoustic fusion detection system, an electrode system is arranged in the simulated corrosion source and comprises a working electrode, a reference electrode and an auxiliary electrode, and the electrode system is connected with the electrochemical workstation.
Controlling the activity degree of a simulated corrosion source through an electrochemical workstation, and simultaneously monitoring by an active and passive acoustic fusion detection system and an electrochemical control system, (1) controlling the simulated corrosion source to be at a cathode polarization potential under the control of the electrochemical workstation, so that corrosion does not occur, and obtaining an active acoustic excitation modulation signal with defect modulation; (2) the simulated corrosion source is under the control of the electrochemical workstation at the anode polarization potential, corrosion occurs, but an active acoustic signal can not be excited, and only a passive acoustic emission signal formed by corrosion is collected; (3) the simulation corrosion source is under the control of an electrochemical workstation at an anodic polarization potential, the corrosion source is corroded, a fusion signal of an active acoustic excitation modulation signal with defect modulation and a passive acoustic emission signal formed by corrosion is collected, a passive acoustic emission signal emitted by a part (not yet formed with a defect) where corrosion begins is collected, the corrosion activity can be adjusted, active and passive acoustic signals in different corrosion states are obtained, the collected signals are analyzed, the relation between defect characteristics and state signal representing the defect characteristics under different conditions is established, and the defect identification method is formed.
The acoustic sensor is internally provided with an acquisition card, an active acoustic excitation module, a data acquisition module and a central processing unit are integrated on the acquisition card, the active acoustic excitation module and the data acquisition module are respectively connected with the central processing unit, and the central processing unit is connected with the active and passive acoustic fusion detection system.
The acoustic sensor is configured for receiving the active acoustic excitation modulation signal and the passive acoustic emission signal; wherein:
the active acoustic excitation modulation signal is obtained by triggering a sensor after active acoustic excitation waves are modulated by the corrosion pit defects of the simulated corrosion source test piece;
the passive acoustic emission signal is obtained by a passive acoustic emission wave trigger sensor which is used for simulating the corrosion pit defect of the corrosion source test piece.
The data acquisition module is configured to be used for acquiring the active acoustic excitation modulation signal and the passive acoustic emission signal received by the acoustic sensor, and then digitally processing the acquired signals and sending the processed signals to the central processing unit.
The central processing unit is configured to control the active acoustic excitation module and the data acquisition module, process the signals to obtain defect information data, and transmit the corresponding defect information data to the active and passive acoustic fusion detection system.
Controlling the activity degree of a simulated corrosion source through an electrochemical workstation, and simultaneously monitoring by an active and passive acoustic fusion detection system and an electrochemical control system, (1) controlling the simulated corrosion source to be at a cathode polarization potential under the control of the electrochemical workstation, so that corrosion does not occur, and obtaining an active acoustic excitation modulation signal with defect modulation; (2) the simulated corrosion source is under the control of the electrochemical workstation at the anode polarization potential, corrosion occurs, but an active acoustic signal can not be excited, and only a passive acoustic emission signal formed by corrosion is collected; (3) the simulation corrosion source is under the control of an electrochemical workstation at an anodic polarization potential, the corrosion source is corroded, a fusion signal of an active acoustic excitation modulation signal with defect modulation and a passive acoustic emission signal formed by corrosion is collected, a passive acoustic emission signal emitted by a part (not yet formed with a defect) where corrosion begins is collected, the corrosion activity can be adjusted, active and passive acoustic signals in different corrosion states are obtained, the collected signals are analyzed, the relation between defect characteristics and state signal representing the defect characteristics under different conditions is established, and the defect identification method is formed. The detection efficiency is greatly improved, and meanwhile, the evaluation result is more comprehensive, visual and reliable.
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 (10)
1. Petrochemical equipment corrosion source active-passive acoustic fusion experiment testing device, its characterized in that, including simulation corrosion source, electrochemical workstation, active-passive acoustic fusion detecting system and electrochemical control system, one side surface of simulation corrosion source sets up the corrosion pit defect, and organic glass pipe is connected to this side surface, contains corrosive solution in the space that this surface and organic glass pipe enclose, arranges acoustic sensor on the simulation corrosion source, acoustic sensor links to each other with active-passive acoustic fusion detecting system, simulation corrosion source connection electrode system, electrode system links to each other with electrochemical workstation.
2. The petrochemical equipment corrosion source active-passive acoustic fusion experimental testing device as claimed in claim 1, wherein the activity degree of the simulated corrosion source is controlled by the electrochemical workstation, and the active-passive acoustic fusion detection system and the electrochemical control system monitor the activity degree of the simulated corrosion source, (1) the simulated corrosion source is at a cathode polarization potential under the control of the electrochemical workstation, and no corrosion occurs, so as to obtain an active acoustic excitation modulation signal with defect modulation; (2) the simulated corrosion source is under the control of the electrochemical workstation at the anode polarization potential, corrosion occurs, but an active acoustic signal can not be excited, and only a passive acoustic emission signal formed by corrosion is collected; (3) the simulation corrosion source is under the control of an electrochemical workstation at an anodic polarization potential, the corrosion source is corroded, a fusion signal of an active acoustic excitation modulation signal with defect modulation and a passive acoustic emission signal formed by corrosion is collected, the passive acoustic emission signal emitted from a corrosion part begins to be corroded, the corrosion activity can be adjusted, active and passive acoustic signals in different corrosion states are obtained, the collected signals are analyzed, the relation between the defect characteristics and the state signal representing the defect characteristics in different conditions is established, and the defect identification method is formed.
3. The petrochemical equipment corrosion source active and passive acoustic fusion experimental testing device as claimed in claim 1, wherein an acquisition card is disposed in the acoustic sensor, an active acoustic excitation module, a data acquisition module and a central processing unit are integrated on the acquisition card, the active acoustic excitation module and the data acquisition module are respectively connected to the central processing unit, and the central processing unit is connected to the active and passive acoustic fusion detection system.
4. The petrochemical plant corrosion source active-passive acoustic fusion experimental testing apparatus of claim 3, wherein the acoustic sensor is configured to receive an active acoustic excitation modulation signal and a passive acoustic emission signal; wherein:
the active acoustic excitation modulation signal is obtained by triggering a sensor after active acoustic excitation waves are modulated by the corrosion pit defects of the simulated corrosion source test piece;
the passive acoustic emission signal is obtained by a passive acoustic emission wave trigger sensor which simulates the part of the corrosion source test piece which is generating corrosion.
5. The petrochemical device corrosion source active-passive acoustic fusion experimental testing apparatus of claim 3, wherein the data acquisition module is configured to acquire the active acoustic excitation modulation signal and the passive acoustic emission signal received via the acoustic sensor, and then send the acquired signals to the central processing unit after being digitized.
6. The active-passive acoustic fusion experimental testing apparatus for corrosion sources of petrochemical equipment as claimed in claim 3, wherein the central processing unit is configured to control the active acoustic excitation module and the data acquisition module, process the signals to obtain defect information data, and transmit the corresponding defect information data to the active-passive acoustic fusion detection system.
7. The petrochemical equipment corrosion source active and passive acoustic fusion experimental testing device as claimed in claim 1, wherein the simulated corrosion source is continuously polished by polishing material until the surface meets the roughness requirement of corrosion test, cleaned by distilled water, rinsed by water and ethanol, dried by cold air, and placed in a drying container.
8. The petrochemical plant corrosion source active and passive acoustic fusion experimental testing device as claimed in claim 1, wherein the acoustic sensor is closely attached to the simulated corrosion source through a coupling agent.
9. The petrochemical equipment corrosion source active and passive acoustic fusion experimental testing device as claimed in claim 1, wherein the simulated corrosion source is made of low carbon steel material.
10. The petrochemical plant corrosion source active-passive acoustic fusion experimental test apparatus of claim 1, wherein the petrochemical plant is a storage tank, a pipeline, a vessel, or a tower.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112964790A (en) * | 2021-02-09 | 2021-06-15 | 常州大学 | Pipeline pitting acoustic simulation testing device and method based on visualization fatigue load effect |
| CN112964788A (en) * | 2021-01-30 | 2021-06-15 | 江苏省特种设备安全监督检验研究院 | Acoustic emission and visualization combined pipeline dynamic pitting process monitoring experiment device |
| CN115561153A (en) * | 2022-11-07 | 2023-01-03 | 西南石油大学 | Natural gas marine pipeline corrosion online detection method and residual life prediction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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