CN112376054B - Anti-interference cathode protection polarization probe structure and test method - Google Patents

Anti-interference cathode protection polarization probe structure and test method Download PDF

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CN112376054B
CN112376054B CN202011079570.6A CN202011079570A CN112376054B CN 112376054 B CN112376054 B CN 112376054B CN 202011079570 A CN202011079570 A CN 202011079570A CN 112376054 B CN112376054 B CN 112376054B
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interference
test piece
reference electrode
test
polarization probe
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CN112376054A (en
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杜艳霞
张雷
孙学鹏
梁毅
王竹
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Beijing Kaisituo Technology Co ltd
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University of Science and Technology Beijing USTB
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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)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

The invention provides an anti-interference cathodic protection polarization probe structure and a test method, relates to the technical field of pipeline corrosion protection, can reduce the interference of stray current, improves the accuracy of test potential, is convenient and fast to assemble and disassemble a polarization probe on site and install the polarization probe again, does not need large-scale earth excavation, and greatly reduces the site operation cost; the probe structure comprises a hollow cylindrical anti-interference reticular test piece, a long-acting reference electrode structure and a polarization probe insulator; the long-acting reference electrode structure comprises a reference electrode arranged in the middle of the anti-interference reticular test piece and a supporting rod used for supporting the reference electrode; the reference electrode is arranged at the bottom end of the supporting rod; a filling material is filled between the reference electrode and the anti-interference reticular test piece; the polarization probe insulator comprises an insulating tube, and the anti-interference netted test piece is arranged at the bottom end of the insulating tube. The technical scheme provided by the invention is suitable for the process of corrosion test of the buried pipeline.

Description

Anti-interference cathode protection polarization probe structure and test method
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of pipeline corrosion protection, in particular to an anti-interference cathodic protection polarization probe structure and a test method.
[ background of the invention ]
Pipeline transportation is widely used in the petroleum and natural gas industry as an economic and effective transportation mode. At present, China has built a large-scale oil and gas pipeline (including oil and gas field pipelines, oil and gas long-distance pipelines and urban gas pipelines) network, the service life of part of oil and gas pipelines exceeds 20 years, the pipelines are more and more seriously aged, the corrosion leakage risk is higher and more, and the safety and environmental protection situation is more and more severe. Cathodic protection technology has found a great deal of application in the corrosion protection of buried long-distance steel pipelines, and cathodic protection is a well-known method for preventing corrosion of buried pipelines. However, the effective test of the cathodic protection polarization potential has great significance for accurately evaluating the cathodic protection effect, the cathodic polarization quantity of the buried pipeline reaches 100mV or the polarization potential is minus 850mVCSECathodic protection is considered effective, indicating that the pipe is at a low risk of corrosion.
The current potential measuring methods of buried pipelines include pipeline instantaneous interruption electrical method, segment testing electrical method and polarized probe method. The pipeline instantaneous power-off method requires that all connected ground protection and sacrificial anodes on the pipeline are required to be disconnected, a plurality of cathode protection devices on the pipeline are required to be disconnected simultaneously, stray current interference does not exist at a test point, and an automatic recorder with extremely high response speed is required to be used by the measuring instrument. The drawback of this measurement method is that it is sometimes inconvenient to disconnect the cathodic protection current and other electrical connections, and the method does not eliminate the non-ohmic drop caused by stray currents and secondary currents. A test piece electrical method is a mature potential test method, a bare test piece is buried beside a pipeline, the material and the buried state of the bare test piece are required to be the same as those of the pipeline, the test piece is connected with the pipeline through a lead, the defect of a covering layer is simulated, and the pipeline provides protection current to carry out polarization. During measurement, the test piece power-off potential can be measured only by disconnecting the connecting lead of the test piece and the pipeline, and the pipeline potential is represented by the test piece potential, so that the trouble of cutting off the main protection current and other electric connections of the pipeline is avoided. When the test piece electrical method adopts the earth surface reference electrode to measure the power-off potential of the test piece, if the IR drop in the soil between the reference electrode and the test piece is large, the IR drop influence cannot be eliminated by adopting the test piece electrical method. Probe test is a new technology developed in recent years, and the polarized probe method is similar to a test-segment electrical method. The polarized probe method buries the reference electrode and the polarized test piece as a whole near the pipeline, reduces the IR drop error to a certain extent, but the polarized probe structure that actually adopts at present adopts the structure of placing test piece and reference electrode side by side more, the problem that exists is that after test piece and pipeline communicate, there is stronger electric field in the position very close to the test piece, especially under the condition that there is alternating current-direct current stray current interference, this kind of electric field influence is very big, even if the reference electrode only has several cm apart from the polarized test piece, nevertheless still can not eliminate IR drop.
Accordingly, there is a need to develop an anti-interference cathodic protection polarization probe structure and test method that address the deficiencies of the prior art to solve or mitigate one or more of the problems set forth above.
[ summary of the invention ]
In view of the above, the invention provides an anti-interference cathodic protection polarization probe structure and a test method, which can reduce the interference of stray current, improve the accuracy of test potential, facilitate the on-site disassembly and re-installation of the polarization probe, avoid the need of large-scale earth excavation, and greatly reduce the on-site operation cost.
On one hand, the invention provides an anti-interference cathodic protection polarization probe structure which is characterized by comprising an anti-interference mesh test piece in a hollow cylindrical shape, a long-acting reference electrode structure and a polarization probe insulator;
the long-acting reference electrode structure comprises a reference electrode arranged in the middle of the anti-interference reticular test piece and a supporting rod used for supporting the reference electrode; the reference electrode is arranged at the bottom end of the supporting rod; a filling material is filled between the reference electrode and the anti-interference reticular test piece;
the polarization probe insulator comprises an insulating tube, and the anti-interference netted test piece is arranged at the bottom end of the insulating tube.
The above aspect and any possible implementation manner further provide an implementation manner, wherein the upper end of the reference electrode is connected with the lower end of the support rod, and can be connected through an internal screw, an electrode connecting cable is arranged inside the support rod, and the electrode connecting cable is connected with the reference electrode.
The above aspect and any possible implementation manner further provide an implementation manner, where the connection manner of the electrode connection cable and the reference electrode is specifically: one end of the electrode connecting cable is fixedly connected with one end of the inner screw, and the connecting end is sealed in the supporting rod by epoxy resin.
In accordance with the foregoing aspect and any one of the possible implementations, there is further provided an implementation that the anti-interference mesh test strip is connected to one end of a test strip connection cable, and the test strip connection cable is disposed along a sidewall of the support rod.
The above aspects and any possible implementation manners further provide an implementation manner, wherein the mesh aperture range of the anti-interference mesh-shaped test piece is 3-8mm, and the mesh distance is 10-30 cm.
The above aspect and any possible implementation manner further provide an implementation manner, wherein an insulating inner coating is coated inside the anti-interference mesh-shaped test piece, and a sealing insulating material is arranged at the bottom end of the anti-interference mesh-shaped test piece.
The above aspects and any possible implementation manners further provide an implementation manner that the insulating tube is directly connected with the anti-interference mesh test piece through a PVC water supply external tooth.
There is further provided in accordance with the above-described aspect and any possible implementation, an implementation in which the insulating tube is a PVC tube.
The above aspects and any possible implementations further provide an implementation in which the reference electrode is a copper sulfate reference electrode or a zinc reference electrode.
On the other hand, the invention provides an anti-interference cathodic protection test system, which is characterized by comprising the anti-interference cathodic protection polarization probe structure and external test equipment, wherein the reference electrode is connected with the external test equipment through an electrode connecting cable, and the anti-interference reticular test piece is connected with the external test equipment through a test piece connecting cable.
In yet another aspect, the present invention provides a test method using an anti-interference polarization probe structure with cathodic protection as described in any of the above, characterized in that the steps of said method comprise:
s1, determining the pore and pore diameter of the anti-interference mesh test piece according to the actual test environment and preparing the anti-interference mesh test piece;
s2, placing the long-acting reference electrode structure in the middle of the anti-interference mesh test piece;
s3, filling and packing materials are filled between the reference electrode and the anti-interference netted test piece;
s4, embedding the polarization probe structure near the pipeline to be tested;
s5, testing the natural potential of the anti-interference mesh test piece to ensure the normal burying;
and S6, connecting the reference electrode and the anti-interference reticular test piece with the corresponding end of the test pile through a connecting cable respectively.
Compared with the prior art, the invention can obtain the following technical effects: the novel anti-interference cathodic protection polarization probe is suitable for measuring the cathodic protection polarization potential of an alternating current-direct current stray current interference area, can reduce the interference of stray current, improves the accuracy of the test potential, can resist the interference of a reticular test piece according to the actual situation on site to replace, disassemble on site and install again, does not need to excavate earth again, greatly reduces the on-site operation cost, and provides powerful technical support for further popularization and application of the probe test technology.
Of course, it is not necessary for any one product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional front view of a novel anti-interference cathodic protection polarization probe provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic bottom view of a novel anti-interference cathodic protection polarization probe provided in accordance with an embodiment of the present invention;
fig. 3 is a graph comparing the results of anti-interference experiments using the anti-interference cathodic protection polarization probe of the present invention.
Wherein, in the figure:
1-fixing the bolt; 2-anti-interference mesh test piece; 3-a reference electrode; 4-PVC water supply for external teeth; 5-internal screw thread; 6-epoxy resin; 7-a support bar; 8-test piece connecting cable; 9-PVC pipe; 10-electrode connection cable; 11-an insulating material; 12 packing material.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The invention provides a novel anti-interference cathodic protection polarization probe, which comprises: the test strip comprises five parts, namely an anti-interference netted test strip 2, a fixing bolt 1, a test strip connecting cable 8, a long-acting reference electrode structure and a polarization probe insulator. The anti-interference netted test piece 2 is made of pipeline steel, the aperture range of meshes is 3-8mm, the mesh spacing is 10-30cm, an internal coating is coated inside the anti-interference netted test piece 2 to enable the inside of the anti-interference netted test piece 2 to be insulated, the bottom of the anti-interference netted test piece 2 is sealed through an insulating material 11, the anti-interference netted test piece 2 is cylindrical as a whole, and the bottom of the anti-interference netted test piece 2 is in a sealed state. The polarization probe insulator comprises PVC water supply outer teeth direct 4 and PVC pipes 9, wherein the PVC water supply outer teeth direct 4 one ends are connected with the anti-interference netted test piece 2 through threads, and one ends are connected with the PVC pipes 9 through PVC adhesives. The long-acting reference electrode structure comprises a reference electrode 3, an internal screw 5, a support rod 7, epoxy resin 6 and an electrode connecting cable 10, wherein the reference electrode 3 is a solid cylinder with a pointed head. The reference electrode 3 can be a long-acting copper sulfate reference electrode or a long-acting zinc reference electrode. The long-acting reference electrode is placed in the center of the reticular test piece, and the space between the reference electrode and the anti-interference reticular test piece is filled with a filling material 12 consisting of gypsum powder, bentonite and industrial sodium sulfate. The packing material comprises the following components in percentage by mass: gypsum powder: bentonite: sodium industrial sulfate 75:20: 5. In order to prevent leakage and retain water, the filling material is soaked in water to form a paste before use.
The size of the anti-interference netted test piece 2 needs to be correspondingly adjusted according to the sizes of different reference electrodes, so that the reference electrode can be placed at the central position of the netted test piece; the anti-interference netted test piece 2 is connected with the anti-interference netted test piece 2 and the test piece connecting cable 8 (namely, the anti-interference netted test piece connecting cable) through the fixing bolt 1. The bottom of the anti-interference netted test piece 2 is sealed by an insulating material 11; the one end of anti-interference netted test block 2 will be processed into and supply water outer tooth with PVC and directly carry out the internal thread of being connected 4 for anti-interference netted test block 2 and PVC supply water outer tooth directly 4 have the one end of external screw thread to carry out zonulae occludens. Meanwhile, the inner diameter of the direct 4-jack of the PVC water supply outer tooth is matched with the outer diameter of the PVC pipe 9, so that the PVC water supply outer tooth and the PVC pipe can be directly bonded into a whole through PVC adhesive. The metal exposed outside of the reference electrode 3 is electrically connected with the internal screw 5; the reference electrode 3 is connected with the support rod 7 through the inner screw 5, the electrode connecting cable 10 is electrically connected with the other end of the inner screw 5 in a welding mode, the inner screw 5 is made of a conductive material, and the end face of the inner screw is sealed inside the support rod 7 through the epoxy resin 6. The electrode connecting cable 10 is arranged inside the support bar 7. The epoxy resin 6 is only required to be 2cm higher than the welding end face. In order to meet the requirements under different environments, the pores and the pore diameters of the anti-interference mesh test piece can be customized, and the pore size and the pore space of the anti-interference mesh test piece can be changed. The support rod 7 is made of an insulating material, typically PVC.
In order to prevent the internal corrosion of the anti-interference netted test piece 2 and the galvanic corrosion of the anti-interference netted test piece 2 and the fixing bolt 1, the inner wall of the anti-interference netted test piece 2, the fixing bolt 1 and the connecting point are coated with the anti-rust paint for more than 3 times, and a uniform anti-rust paint coating is ensured.
In practical application, after the anti-interference netted test piece is assembled, the long-acting reference electrode is placed in the center of the anti-interference netted test piece, then the anti-interference netted test piece is filled with a filling material consisting of gypsum powder, bentonite and industrial sodium sulfate, and then the anti-interference netted test piece begins to be buried at a position 30cm away from the outer wall of the pipeline (the netted test piece is buried vertically in the pipeline, namely the head of the bottom end of the netted test piece is mounted at a position 30cm away from the outer wall of the pipeline, and other positions are vertically upward until the ground). After burying, testing the natural potential of the anti-interference netted test piece by a universal meter, if the potential of the test piece is measured to be-0.4 to-0.8V (relative to a copper/copper sulfate reference electrode), indicating that the burying is normal, and then connecting the test piece connecting cable and the electrode connecting cable to the corresponding position of the test pile, and enabling the probe to work normally. The anti-interference mesh test piece is buried for a period of time and has good anti-interference performance to stray current.
Example 1:
(1) a batch of 5mm thick Q235 steel plates was purchased, passed through a drum, and rolled to an outside diameter (R)2) Has an inner diameter (R) of 57.3mm1) 47.3mm in height (h)6) Welding and polishing a 100mm circular ring, punching according to the aperture size and the pore space, and then processing an internal thread at one end of the test piece to obtain an anti-interference reticular test piece;
(2) after the anti-interference mesh test piece is processed, connecting a lead with the anti-interference mesh test piece by using a bolt in a small hole at the end without threads, and then leading the lead to the outside of the anti-interference mesh test piece by penetrating through the anti-interference mesh test piece;
(3) coating antirust paint on the inner wall of the anti-interference netted test piece and the bolt of the connecting wire, uniformly coating the antirust paint on the inner wall of the anti-interference netted test piece and the bolt by using a brush, performing second coating after the anti-interference netted test piece and the bolt are thoroughly dried, and repeating the process for three times to uniformly adhere a thick layer of antirust paint on the inner wall of the anti-interference netted test piece and the bolt;
(4) the PVC water supply external tooth which is available in the market is purchased, the external diameter of the external tooth is 47.2mm, the length of the external tooth is 25.8mm, the overall height is 60.7mm, the internal diameter of the socket is 50mm, and the thickness of the socket is 3.6 mm; connecting the end with the threads of the anti-interference reticular test piece with the end with the threads of the PVC water supply external teeth directly by threads;
(5) PVC pipe available on the market, having an outer diameter (d)3) Is 50mm, and the length is cut into 1.2 m; uniformly coating a PVC adhesive on the outer diameter of one end of the PVC pipe, then directly bonding the PVC adhesive with a direct socket of a PVC water supply external tooth into a whole, and finishing the manufacture of the integral structure of the anti-interference netted test piece after the PVC adhesive is solidified;
(6) electrically connecting the electrode connecting cable with the other end of the inner screw in a welding mode by electric welding;
(7) sealing the end face of the inner screw welded with the electrode connecting cable in a support rod with epoxy resin, wherein the diameter (d) of the support rod4) Is 40mm in length (h)4) 1m, and the sealing depth of the epoxy resin is 12 cm;
(8) mounting a reference electrode on the inner screw to form a portable reference electrode;
(9) excavating at the position of a tested pipeline test pile, leaking out a pipe body, putting a long-acting reference electrode into the center of an anti-interference net-shaped test piece, filling the anti-interference net-shaped test piece with a filling material consisting of gypsum powder, bentonite and industrial sodium sulfate, and then burying the anti-interference net-shaped test piece at a position which is 30cm away from the outer wall of the pipeline. After burying, testing the natural potential of the anti-interference netted test piece by a universal meter, if the potential of the test piece is measured to be-0.4 to-0.8V (relative to a copper/copper sulfate reference electrode), indicating that the burying is normal, and then connecting the anti-interference netted test piece connecting cable and the electrode connecting cable to the corresponding position of the test pile, the probe can work normally. The experiment result of embedding for a period of time to find that the anti-interference mesh test piece has good anti-interference performance on stray current is shown in figure 3, wherein EoffTo true polarization potential, ERPFor the anti-interference probe test data introduced by the patent, the other two groups are data measured by other probes, and it can be obviously seen that the data measured by the anti-interference probe is closest to the true value.
The anti-interference cathodic protection polarization probe structure and the test method provided by the embodiment of the application are introduced in detail above. The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
As used in the specification and claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.

Claims (8)

1. An anti-interference cathode protection polarization probe structure is characterized in that the probe structure comprises an anti-interference mesh test piece in a hollow cylindrical shape, a long-acting reference electrode structure and a polarization probe insulator;
the long-acting reference electrode structure comprises a reference electrode arranged in the middle of the anti-interference reticular test piece and a supporting rod used for supporting the reference electrode; the reference electrode is arranged at the bottom end of the supporting rod; a filling material is filled between the reference electrode and the anti-interference reticular test piece; the filling material consists of gypsum powder, bentonite and industrial sodium sulfate;
the polarization probe insulator comprises an insulating tube, and the anti-interference reticular test piece is arranged at the bottom end of the insulating tube;
the upper end of the reference electrode is connected with the lower end of the support rod, an electrode connecting cable is arranged inside the support rod, and the electrode connecting cable is connected with the reference electrode;
the anti-interference netted test piece is connected with one end of the test piece connecting cable, and the test piece connecting cable is arranged along the side wall of the supporting rod.
2. The anti-interference cathodic protection polarization probe structure according to claim 1, wherein the connection mode of said electrode connection cable and said reference electrode is specifically: one end of the electrode connecting cable is fixedly connected with one end of the inner screw, and the connecting end is sealed in the supporting rod by epoxy resin.
3. The anti-interference cathodic protection polarization probe structure according to claim 1, wherein the mesh aperture range of the anti-interference mesh test piece is 3-8mm, and the mesh pitch is 10-30 cm.
4. The anti-interference cathodic protection polarization probe structure according to claim 1, wherein the anti-interference mesh test piece is internally coated with an insulating inner coating, and the bottom end of the anti-interference mesh test piece is provided with a sealing insulating material.
5. The anti-interference cathodic protection polarization probe structure according to claim 1, wherein the insulating tube is directly connected with the anti-interference mesh test piece through PVC water supply external teeth.
6. The anti-interference cathodoprotected polarising probe structure according to claim 1, wherein said reference electrode is a copper sulphate reference electrode or a zinc reference electrode.
7. An anti-interference cathodic protection test system, comprising the anti-interference cathodic protection polarization probe structure of any one of claims 1 to 6 and an external test device, wherein the reference electrode is connected with the external test device through an electrode connecting cable, and the anti-interference mesh test strip is connected with the external test device through a test strip connecting cable.
8. A method of testing using an anti-tamper cathodoprotected polarising probe structure as claimed in any of claims 1 to 6, the method comprising the steps of:
s1, determining the pore and pore diameter of the anti-interference mesh test piece according to the actual test environment and preparing the anti-interference mesh test piece;
s2, placing the long-acting reference electrode structure in the middle of the anti-interference mesh test piece;
s3, filling and packing materials are filled between the reference electrode and the anti-interference netted test piece;
s4, embedding the polarization probe structure near the pipeline to be tested;
s5, testing the natural potential of the anti-interference mesh test piece to ensure the normal burying;
and S6, connecting the reference electrode and the anti-interference reticular test piece with the corresponding end of the test pile through a connecting cable respectively.
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CN108754504A (en) * 2018-08-07 2018-11-06 西安英柯迈信息技术有限公司 A kind of cathodic protection potential detection device and its test method

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