CN108823571B - Intelligent seawater pipeline sacrificial anode structure with critical alarm function and corrosion state in-situ monitoring method thereof - Google Patents
Intelligent seawater pipeline sacrificial anode structure with critical alarm function and corrosion state in-situ monitoring method thereof Download PDFInfo
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- CN108823571B CN108823571B CN201810068456.XA CN201810068456A CN108823571B CN 108823571 B CN108823571 B CN 108823571B CN 201810068456 A CN201810068456 A CN 201810068456A CN 108823571 B CN108823571 B CN 108823571B
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- 238000011065 in-situ storage Methods 0.000 title claims description 7
- 238000012544 monitoring process Methods 0.000 title claims description 7
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- 238000001514 detection method Methods 0.000 description 4
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- 229910000967 As alloy Inorganic materials 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/10—Electrodes characterised by the structure
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/22—Monitoring arrangements therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/32—Pipes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Emergency Alarm Devices (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention provides an intelligent seawater pipeline sacrificial anode structure with a critical alarm function, which comprises an anode core, an outer sleeve and a critical induction alarm device. The anode core is a hollow tubular core body, and the anode core is nested in the outer sleeve. The two ports of the outer sleeve and the anode core are sealed and then connected with a seawater pipeline. The outer surface of the anode core is provided with a plurality of annular grooves, and the annular grooves are communicated through a connecting groove intersected with the annular grooves to form an indicating channel; and a hole is formed in the outer sleeve at the position corresponding to the connecting groove of the anode core inner layer, the hole is communicated with the connecting groove, and a critical induction alarm device is installed at the hole. The end part of the critical induction alarm device is provided with two conductive contact probes, and the conductive contact probes are arranged in the connecting groove to be used as trigger units. After the invention is used, the sacrificial anode can be replaced in time according to the audible and visual alarm prompt when the sacrificial anode is consumed to a certain extent, thereby solving the problem that the replacement time can not be judged in the use process.
Description
Technical Field
The invention relates to the field of corrosion prevention of a marine seawater pipe system, in particular to an intelligent seawater pipe sacrificial anode structure with a critical alarm function and a corrosion state in-situ monitoring method thereof.
Background
The marine pipeline system of the ship often has corrosion problems in the using process, thereby not only influencing the normal navigation of the ship and reducing the technical performance, but also greatly increasing the maintenance cost of the ship. The sacrificial anode protection is a very economic and effective anti-corrosion measure widely adopted at home and abroad at present, wherein the ferroalloy sacrificial anode has the characteristics of proper open circuit potential, large electric capacity (over 930 Ah/K), high current efficiency, uniform dissolution, long anode service life and the like, and is widely used for the cathodic protection of copper seawater pipelines, coolers, condensers and stainless steel structures, and has good anti-corrosion effect. And moreover, iron ions dissolved from the iron alloy anode can form an iron-rich film on the surface of the copper alloy, so that the corrosion resistance of the copper alloy pipeline is further improved.
The protection range and the design life of the ferroalloy anode are generally considered when the ferroalloy anode is designed and applied, and the ferroalloy anode realizes the protection of a pipeline to be protected while dissolving and consuming. When it corrodes to become depleted, it loses its cathodic protection efficacy in protecting the metals to which it is attached, and must be replaced.
However, in practice, the protection range and the service life of the iron anode are still different from the theoretical design, and since the iron alloy sacrificial anode is usually installed in the seawater pipeline system through a flange, a crew cannot observe the condition of the iron anode in the use process under the actual working condition, so that the replacement time cannot be determined. In addition, the ferroalloy anode is usually unevenly dissolved in the process of corrosion consumption, and local corrosion dissolution accelerates the consumption of the ferroalloy anode, so that the service life of the ferroalloy anode cannot reach the designed service life. Due to the actual working conditions, a crew cannot find that the ferroalloy anode fails in time, so that measures cannot be taken in time to solve the problem of corrosion leakage, and hidden danger is brought to the effective operation of a pipeline system. The intelligent ferroalloy anode is urgently needed to be developed, and when the ferroalloy anode is completely consumed or the local corrosion is serious to a critical state needing to be replaced, an alarm signal is rapidly sensed and sent, so that a crew can timely know and take measures.
No patent is currently retrieved for warning of sacrificial ferroalloy anode depletion to a critical value. A possible embodiment, for example CN1784511, discloses a device for indicating when a predetermined portion of a sacrificial anode has been corroded, the device comprising an rfid device embedded within the sacrificial anode at a predetermined distance from the exposed outer surface of the sacrificial anode, the presence of the rfid device being detectable by a detection system before the predetermined portion of the sacrificial anode has been corroded, said rfid device being separated from the sacrificial anode and no longer being detectable when the predetermined portion has been corroded. The method is effective for uniform corrosion, if the uniform corrosion occurs, the response is difficult to be carried out in time, and meanwhile, the method is effective for an open system and is difficult to transmit and receive signals inside a pipeline system. Patent CN105331982A discloses a sacrificial anode structure and a method for checking the corrosion state thereof, in which the anode has a pore passage, the pore passage is exposed when the anode is corroded to a certain position, a corrosion medium enters the pore passage, a nut is opened, and whether a liquid medium seeps out is checked, so as to determine whether the anode needs to be replaced. The device can only confirm the consumption condition of the anode through personnel to equipment field inspection, has great limitation to the use of the environment that inconvenient personnel get into, and has the problem that only effective to the observation point in addition. Patent CN201652766U discloses a water heater capable of detecting and prompting sacrificial anode exhaustion, wherein a deformed elastic body is pre-buried in an anode, when the anode is gradually consumed to a position near the elastic body, the elastic body can gradually restore to the original shape, and the joint of two contacts is conducted to alarm. The device is also only directed to uniform corrosion of the rod-shaped anode.
In summary, the application of the ferroalloy sacrificial anode in the seawater pipeline system is increasingly wide, but a seawater pipeline sacrificial anode capable of intelligently alarming in time when the corrosion reaches a critical value is lacked.
Disclosure of Invention
The invention aims to solve the problem that the traditional pipeline sacrificial anode is used for corrosion prevention of a seawater pipeline system, and provides an intelligent seawater pipeline ferroalloy sacrificial anode with a critical alarm function. After the invention is used, when the sacrificial anode of the seawater pipeline is consumed to the critical value in the use process, the alarm is given in time, and the problem that the replacement time of the sacrificial anode cannot be judged in the use process is solved. When the sacrificial anode is consumed to a certain extent, the sacrificial anode can be replaced in time according to the audible and visual alarm prompt.
The technical scheme adopted by the invention for solving the technical problems is as follows:
1. the invention provides an intelligent seawater pipeline sacrificial anode structure with a critical alarm function, which comprises an anode core, an outer sleeve and a critical induction alarm device,
the anode core is a hollow tubular core body and serves as a sacrificial anode to protect a seawater pipeline connected with the sacrificial anode, and the anode core is nested in the outer sleeve;
the outer sleeve is sealed with two ports of the anode core and then connected with a seawater pipeline through a fixing device (such as a connecting flange);
the outer surface of the anode core is provided with a plurality of annular grooves, and the annular grooves are communicated through a connecting groove intersected with the annular grooves to form an indicating channel;
the outer sleeve is made of the same material as the seawater pipeline, an opening is formed in the position, corresponding to the connecting groove of the outer surface of the anode core, of the outer sleeve, the opening is communicated with the connecting groove, a critical induction alarm device is installed at the opening, two conductive contact probes are arranged at the end of the critical induction alarm device, and the conductive contact probes are arranged in the connecting groove to serve as trigger units.
As a further improvement of the invention, the critical induction alarm device also comprises a packaging shell, a power supply unit, an acoustic alarm unit and an optical alarm unit, wherein the material of the packaging shell is consistent with that of the outer sleeve, the power supply unit is packaged in the packaging shell, the acoustic alarm unit and the optical alarm unit are arranged at one end of the packaging shell, a trigger unit formed by two conductive contact probes is arranged at the other end of the packaging shell, and the power supply unit, the acoustic alarm unit, the optical alarm unit and the trigger unit form a low-power-consumption electronic alarm circuit.
As a further improvement of the invention, the power supply unit is a micro battery which can be a button battery or the like, the sound alarm unit can be a small buzzer, and the light alarm unit can be a light emitting diode.
As a further improvement of the invention, the outer surface of the anode core is provided with 3-10 annular grooves with the depth of 1-5 mm.
As a further improvement of the invention, the outer sleeve and the anode core are assembled in an interference fit mode, and are welded and sealed at two ports.
In a further improvement of the present invention, the anode core is a tubular iron anode core, the anode core is made of a common iron alloy sacrificial anode material containing Mn, Cr and a trace amount of Al as alloy elements, and the seawater pipeline is made of copper, copper alloy or stainless steel.
As a further improvement of the invention, the packaging shell is arranged at the opening of the outer sleeve through a threaded connection.
As a further improvement of the invention, the conductive contact probe is made of a corrosion-resistant metal material.
As a further improvement of the invention, two ends of the packaging shell are provided with insulation and pressure resistance seals.
As a further improvement of the present invention, the material of the dielectric-pressure-proof seal may be epoxy resin or polytetrafluoroethylene.
2. The invention also provides an in-situ monitoring method for corrosion state of the sacrificial anode structure of the seawater pipeline, which is based on the sacrificial anode structure of the seawater pipeline,
when the anode core does not corrode the outer sleeve, no seawater electrolyte is communicated between the two conductive contact probes, and the critical alarm device is not started;
when the anode core is dissolved and corroded to the outer sleeve, namely the corrosion depth reaches the annular groove on the outer side of the anode core, seawater in the seawater pipeline flows into the annular groove and is collected at the connecting groove, seawater electrolyte is connected with the two conductive contact probes to conduct the circuit, and the critical alarm device is started and sends out sound and light alarm signals.
As a further improvement of the invention, in the installation process of the anode core, the opening of the outer sleeve is positioned at the horizontal position outside the seawater pipeline, so that the critical sensing alarm device is positioned in the horizontal front of the seawater pipeline, and the alarm detection and observation of the critical sensing alarm device are facilitated.
Compared with the prior art, the intelligent seawater pipeline sacrificial anode structure with the critical alarm function and the corrosion state in-situ monitoring method thereof have the following beneficial effects:
1. the corrosion inhibitor is effective against the uneven corrosion inside the seawater pipeline system, and plays a role in protecting the seawater pipeline connected with the seawater pipeline;
2. when the sacrificial anode dissolution consumption reaches a critical value, the critical induction alarm device gives out sound and light alarm to prompt replacement.
Drawings
FIG. 1 is a schematic structural view of an anode core of the present invention;
FIG. 2 is a schematic diagram of a sacrificial anode structure of the present invention;
FIG. 3 is a block diagram of the critical inductive warning device of the present invention;
FIG. 4 is a schematic diagram of a low power electronic warning circuit of the present invention;
figure 5 is a schematic illustration of the installation of the sacrificial anode structure of the present invention.
In the figure, 1, an annular groove, 2, a connecting groove, 3, an anode core, 4, an outer sleeve, 5, an opening, 6, an acoustic alarm unit, 7, an optical alarm unit, 8, an insulating seal, 9, a power supply unit, 10, a trigger unit, 11, a seawater pipeline, 12, a connecting flange, 13, a packaging shell, 14 and a critical induction alarm device.
Detailed Description
The following detailed description will be made with reference to fig. 1-5 for an intelligent seawater pipeline sacrificial anode structure with critical alarm function and its corrosion state in-situ monitoring method.
Examples
As shown in fig. 1, 2 and 5, the sacrificial anode structure of the intelligent seawater pipeline 11 with a critical alarm function mainly comprises an anode core 3, an outer sleeve 4 and a critical induction alarm device 14. The anode core 3 is a hollow tubular core body and is used as a sacrificial anode to protect a seawater pipeline 11 connected with the sacrificial anode. The anode core 3 is nested inside the outer sleeve 4, and the outer sleeve 4 is directly connected with the flange of the seawater pipeline 11 through the connecting flange 12 after being sealed with two ports of the anode core 3. The critical induction alarm device 14 is arranged on the outer sleeve 4 and can give out sound and light alarm when the anode core 3 is corroded, dissolved and consumed to the wall of the outer sleeve 4.
As shown in fig. 1, the anode core 3 is a tubular iron anode core 3, and is made of a common iron alloy sacrificial anode material containing Mn, Cr and trace Al as alloy elements. A plurality of (3-10) annular grooves 1 are machined on the outer surface of the anode core 3, the depth of each annular groove 1 is 1-5 mm, and the annular grooves 1 are communicated through a connecting groove 2 which is intersected with the annular grooves to form an indicating channel.
As shown in fig. 2, the outer sleeve 4 is made of the same material as the seawater pipeline 11 or the connecting flange 12, such as copper, copper alloy or stainless steel, and the outer sleeve 4 and the anode core 3 are assembled by interference fit and are welded and sealed at two ports. An opening 5 is formed in the outer sleeve 4 corresponding to the connecting groove 2 on the outer surface of the anode core 3, the opening 5 is communicated with the connecting groove 2, and a critical induction alarm device 14 is installed at the opening 5. The end of the critical induction alarm device 14 is provided with two conductive contact probes which are arranged in the connecting groove 2 as a trigger unit 10.
As shown in fig. 3, the critical sensing alarm device 14 further includes a package housing 13, a power supply unit 9, an acoustic alarm unit 6, and an optical alarm unit 7. The material of the packaging shell 13 is consistent with that of the outer sleeve 4, the power supply unit 9 is packaged in the packaging shell 13, the sound alarm unit 6 and the light alarm unit 7 are arranged at one end of the packaging shell 13, the trigger unit 10 formed by the two conductive contact probes is arranged at the other end of the packaging shell 13, and the power supply unit 9, the sound alarm unit 6, the light alarm unit 7 and the trigger unit 10 form a low-power-consumption electronic alarm circuit.
In order to realize the miniaturization of the critical induction alarm device 14, the power supply unit 9 is a miniature battery which can be a button battery and the like, the sound alarm unit 6 can be a miniature buzzer, and the light alarm unit 7 can be a light emitting diode. The conductive contact probe of the trigger unit 10 is made of corrosion-resistant metal.
Fig. 4 is a connection relationship diagram of each element in the low power consumption electronic alarm circuit, wherein G is a micro battery, H1 is a small buzzer, H2 is a light emitting diode, K is a normally open trigger unit 10, R1 and R2 are two large resistors, and an optical coupler V1 and a triode V2 prevent external electric signals from damaging the alarm device.
In order to facilitate the installation and the disassembly of the critical induction alarm device 14, the packaging shell 13 is designed into a hollow cylinder shape, the end part of the packaging shell is provided with external threads, and the packaging shell is installed at the opening 5 of the outer sleeve 4 through threaded connection. The two ends of the packaging shell 13 are provided with insulating seals 8, the packaging shell has the capability of resisting 2 MPa water pressure, and the insulating seals 8 can be made of epoxy resin or polytetrafluoroethylene.
To facilitate the observation and alarm detection of the critical inductive alarm device 14, during the installation of the anode core 3, the opening 5 of the outer sleeve 4 is located at a horizontal position outside the seawater pipe 11, so that the critical inductive alarm device 14 is located horizontally in front of the seawater pipe 11.
The invention discloses an intelligent seawater pipeline 11 sacrificial anode structure with a critical alarm function, which is realized by the following steps:
when the anode core 3 is not corroded to the outer sleeve 4, no seawater electrolyte is communicated between the two conductive contact probes, and the critical alarm device is not started;
when the anode core 3 is dissolved and corroded to the outer sleeve 4, namely the corrosion depth reaches the annular groove 1 on the outer side of the anode core 3, seawater in the seawater pipeline 11 flows into the annular groove 1 and is collected at the connecting groove 2, seawater electrolyte is connected with the two conductive contact probes, so that the low-power-consumption electronic alarm circuit is conducted, and the critical alarm device is started and sends out sound and light alarm signals.
It should be noted that, in the present invention, the sea water pipe 11 may be a circular pipe or a square pipe, and the anode core 3 and the annular groove 1 have the same shape as the sea water pipe 11. The annular grooves 1 are communicated through a connecting groove 2 intersecting with each other to form an indicating channel, wherein the intersection can be a vertical intersection in fig. 1 and 2 or an inclined intersection with a certain angle. The depth of the annular groove 1 on the outer surface of the anode core 3 is 1-5 mm, and the depth is specifically selected according to the material of the seawater pipeline 11, the material of the anode core 3 and the pipe diameter of the pipeline.
Test examples
As shown in fig. 5, in the test example, the copper-nickel alloy seawater pipeline 11 is protected, the sacrificial anode structure of the present invention is installed between two copper-nickel alloy seawater pipelines 11, and the outer sleeve 4 of the sacrificial anode structure is made of copper-nickel alloy. The anode core 3 is a sacrificial anode made of iron alloy, and the length and thickness of the sacrificial anode are determined according to the installation space requirement and the design life requirement of a specific seawater pipeline 11. The direction of attention during installation is such that the threshold induction warning device 14 is in horizontal front of the pipeline for alarm detection and observation. After a period of accelerated corrosion test, when the consumption of the iron anode reaches the outer tube wall of the copper-nickel alloy, the critical induction alarm device 14 gives out an audible and visual alarm to prompt the timely replacement of the iron alloy sacrificial anode of the seawater pipeline 11.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
In addition to the technical features described in the specification, the technology is known to those skilled in the art.
Claims (9)
1. An intelligent seawater pipeline sacrificial anode structure with a critical alarm function is characterized by comprising an anode core, an outer sleeve and a critical induction alarm device,
the anode core is a hollow tubular core body and serves as a sacrificial anode to protect a seawater pipeline connected with the sacrificial anode, and the anode core is nested in the outer sleeve;
the two ports of the outer sleeve and the anode core are sealed and then connected with a seawater pipeline;
the outer surface of the anode core is provided with a plurality of annular grooves, and the annular grooves are communicated through a connecting groove intersected with the annular grooves to form an indicating channel;
the outer sleeve is made of the same material as the seawater pipeline, an opening is formed in the position, corresponding to the connecting groove of the outer surface of the anode core, of the outer sleeve, the opening is communicated with the connecting groove, a critical induction alarm device is installed at the opening, two conductive contact probes are arranged at the end of the critical induction alarm device, and the conductive contact probes are arranged in the connecting groove to serve as trigger units.
2. The sacrificial anode structure of intelligent seawater pipeline with critical alarm function as claimed in claim 1, wherein the critical sensing alarm device further comprises a packaging shell, a power supply unit, an acoustic alarm unit, and an optical alarm unit, wherein the material of the packaging shell is consistent with that of the outer sleeve, the power supply unit is packaged in the packaging shell, the acoustic alarm unit and the optical alarm unit are arranged at one end of the packaging shell, the trigger unit composed of two conductive contact probes is arranged at the other end of the packaging shell, and the power supply unit, the acoustic alarm unit, the optical alarm unit and the trigger unit constitute an alarm circuit.
3. The sacrificial anode structure of intelligent seawater pipeline with critical alarm function as claimed in claim 1 or 2, wherein the outer surface of the anode core is machined with 3-10 ring-shaped grooves with depth of 1-5 mm.
4. The sacrificial anode structure of intelligent seawater pipeline with critical alarm function as claimed in claim 1 or 2, wherein the outer sleeve and the anode core are assembled by interference fit and are welded and sealed at two ports.
5. The sacrificial anode structure of intelligent seawater pipeline with critical alarm function as claimed in claim 2, wherein the packaging shell is installed at the opening of the outer sleeve by screw connection.
6. The sacrificial anode structure of intelligent seawater pipeline with critical alarm function as claimed in claim 1 or 2, wherein the conductive contact probe is made of corrosion-resistant metal.
7. The sacrificial anode structure of intelligent seawater pipeline with critical alarm function as claimed in claim 2 or 5, wherein the two ends of the packaging casing are provided with insulation and pressure-proof seals.
8. The sacrificial anode structure of intelligent seawater pipeline with critical alarm function as claimed in claim 1, 2 or 5, wherein the opening of the outer sleeve is in horizontal position outside the seawater pipeline during the installation of the anode core.
9. An in-situ monitoring method for corrosion state of a sacrificial anode structure of a seawater pipeline, which is characterized in that the method is based on the sacrificial anode structure of the seawater pipeline as claimed in claim 1, 2 or 5;
when the anode core does not corrode the outer sleeve, no seawater electrolyte is communicated between the two conductive contact probes, and the critical alarm device is not started;
when the anode core is dissolved and corroded to the outer sleeve, namely the corrosion depth reaches the annular groove on the outer side of the anode core, seawater in the seawater pipeline flows into the annular groove and is collected at the connecting groove, seawater electrolyte is connected with the two conductive contact probes to conduct the circuit, and the critical alarm device is started and sends out sound and light alarm signals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810068456.XA CN108823571B (en) | 2018-01-24 | 2018-01-24 | Intelligent seawater pipeline sacrificial anode structure with critical alarm function and corrosion state in-situ monitoring method thereof |
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| CN201810068456.XA CN108823571B (en) | 2018-01-24 | 2018-01-24 | Intelligent seawater pipeline sacrificial anode structure with critical alarm function and corrosion state in-situ monitoring method thereof |
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| CN108823571B true CN108823571B (en) | 2020-06-23 |
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| CN113913831A (en) * | 2021-10-18 | 2022-01-11 | 江南造船(集团)有限责任公司 | Seawater pipeline corrosion prevention device and using method |
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|---|---|
| CN108823571A (en) | 2018-11-16 |
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