CN112430817A - Split type device and method for buried metal pipeline corrosion parameter test probe - Google Patents
Split type device and method for buried metal pipeline corrosion parameter test probe Download PDFInfo
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- CN112430817A CN112430817A CN202011035713.3A CN202011035713A CN112430817A CN 112430817 A CN112430817 A CN 112430817A CN 202011035713 A CN202011035713 A CN 202011035713A CN 112430817 A CN112430817 A CN 112430817A
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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
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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
- 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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Abstract
The invention provides a split type device and a test method for a corrosion parameter test probe of a buried metal pipeline, wherein the device comprises the following components: the corrosion parameter testing device comprises an installation passage cavity, a corrosion parameter testing test piece and a long-acting reference electrode, wherein the installation passage cavity is a hollow cavity, the corrosion parameter testing test piece and the long-acting reference electrode can be detachably arranged in the installation passage cavity, and the corrosion parameter testing test piece and the long-acting reference electrode are mutually independent. According to the invention, the cathode protection state, the alternating current and direct current interference condition and the corrosion rate of the buried metal pipeline are obtained through the corrosion parameter test probe, so that the cathode protection level, the alternating current and direct current interference degree and the corrosion risk of the buried pipeline are judged.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of metal pipeline corrosion testing, in particular to a split type device and a testing method for a buried metal pipeline corrosion parameter testing probe.
[ background of the invention ]
Due to the continuous construction of infrastructures such as high-voltage transmission lines, urban rail transit, buried transmission pipelines and the like, the phenomena of parallelism and intersection of the high-voltage transmission lines, the electrified railways and the buried metal pipelines are more common, and serious alternating current and direct current interference is caused to the pipelines. The buried pipeline has current inflow/outflow at the coating damage position of the pipeline under the interference action, so that the risks of corrosion, corrosion prevention layer stripping and the like of the buried pipeline are increased. Because the cathodic protection technology is economic and effective, the cathodic protection technology is widely applied to the aspect of preventing the corrosion of buried metal pipelines, and the polarization potential is an important index for detecting and evaluating the cathodic protection effect. Therefore, accurately measuring parameters such as cathodic protection polarization potential, alternating current density, direct current density, corrosion rate and the like of the buried metal pipeline has very important significance for judging corrosion risk of the buried pipeline.
NACE TM 0497 states: "if there is stray current, or the sacrificial anode is directly connected to the pipe, or there is an external forced current device and cannot be interrupted, the probe has to be used to measure the true potential of the pipe". However, the cathodic protection test probe can only test the polarization potential of the pipeline, and cannot obtain the corrosion rate. If the corrosion rate of the buried pipeline needs to be detected, pit detection needs to be respectively excavated at the determined test pile positions to bury the corrosion inspection pieces, and the field installation and sampling of the corrosion inspection pieces for the corrosion rate test involve multiple times of excavation, and the excavation amount is large, and the construction of town areas is difficult. In addition, the reference electrode needs to be buried underground for a long time, failure phenomena often occur due to electrolyte permeation, micro-permeation end blockage and the like, maintenance of the reference electrode becomes very difficult once a pit is backfilled, and once the pit is failed, the reference electrode can only be discarded, so that resource waste is serious. Therefore, it is particularly important to monitor the AC/DC interference condition and corrosion condition of the pipeline and maintain the buried long-acting reference electrode by using the test piece.
Accordingly, there is a need to develop a split type device and a method for testing a corrosion parameter test probe of a buried metal pipeline to overcome the shortcomings of the prior art, so as to solve or alleviate one or more of the above problems.
[ summary of the invention ]
In order to solve the problems, a special test tool needs to be developed, the buried pipeline corrosion parameter test probe split structure is a further development of a buried corrosion inspection sheet, a detachable multifunctional corrosion parameter test unit and a maintainable reference electrode are arranged in the same installation access cavity together, through reasonable structural design, the multifunctional corrosion parameter test unit and the long-acting reference electrode can accurately measure the alternating current and direct current interference parameters and the corrosion condition of the pipeline after being buried, the corrosion parameter test unit and the long-acting reference electrode are convenient to replace or maintain, and the construction difficulty is greatly reduced.
In one aspect, the invention provides a split type device of a corrosion parameter test probe for a buried metal pipeline, which comprises:
the mounting passage cavity is a cavity with a hollow interior;
the corrosion parameter testing unit is arranged in the installation passage cavity and comprises an insulating shell, a to-be-tested piece, a test piece base and a testing test piece cable, wherein the to-be-tested piece is arranged in the test piece base, the test piece base is detachably connected with the insulating shell, one end of the testing test piece cable is electrically connected with the to-be-tested piece, and the other end of the testing test piece cable is connected with the external environment;
the long-acting reference electrode is detachably arranged in the installation passage cavity,
the corrosion parameter testing unit and the long-acting reference electrode are mutually independent.
The above-mentioned aspects and any possible implementation manners further provide an implementation manner, the to-be-tested strip is installed in the test strip base in an interference sealing manner, the exterior of the test strip base is made of an insulating material, a first metal conductive piece is arranged inside the test strip base, one end of the first metal conductive piece is connected to the to-be-tested strip, the other end of the first metal conductive piece is communicated with the test strip cable, and the mechanical connection manner between the test strip base and the insulating housing includes, but is not limited to, a threaded connection and a snap connection.
In the above aspect and any possible implementation manner, a second metal conductive component mechanically matched with the test block base is disposed inside the insulating housing, the test block cable is inserted into the insulating housing, one end of the test block cable is connected to the first metal conductive component through the second metal conductive component, and the other end of the test block cable is connected to an external environment.
The above-mentioned aspects and any possible implementation manners further provide an implementation manner, in which only one metal surface of the to-be-tested piece is exposed by the corrosion parameter testing unit, and the other surfaces are insulated and sealed, the to-be-tested piece is circular or cylindrical, the exposed metal surface area is determined according to the insulating property of the anticorrosive coating of the to-be-tested pipeline, and the exposed metal surface area includes, but is not limited to, 1cm2、6.5cm2、10cm2And 20cm2。
The above-mentioned aspects and any possible implementation manner further provide an implementation manner, where the long-acting reference electrode includes a reference electrode, a supporting handle, and a reference electrode cable, a third metal conductive piece is disposed inside the supporting handle, a metal terminal of the reference electrode is electrically connected to the third metal conductive piece, the metal terminal of the reference electrode is mechanically connected to the supporting handle, the reference electrode cable is inserted into the supporting handle, and one end of the reference electrode cable is electrically connected to the third metal conductive piece, and the other end of the reference electrode cable extends out of the supporting handle to be connected to an external environment.
The above aspects and any possible implementation manners further provide an implementation manner, and the corrosion parameter testing unit is used for testing parameters of natural corrosion potential, cathodic protection energization potential, cathodic protection polarization potential, alternating current interference voltage, test piece power-off potential, alternating current density, direct current density and corrosion rate.
The above aspects and any possible implementation further provide an implementation in which the top of the installation access cavity is provided with a sealing cover, and the hollow cavity and the sealing cover are made of insulating materials, including but not limited to polyvinyl chloride and polytetrafluoroethylene.
The above aspects and any possible implementation further provide a buried metal pipeline corrosion parameter testing method, including the steps of:
s1: determining the material, area and quantity of the test specimen according to the material, surface coating type and condition of the metal pipeline to be tested;
s2: providing a test probe split type device comprising an installation passage cavity, a corrosion parameter test unit and a long-acting reference electrode, wherein a test piece cable and a reference electrode cable are electrically connected with the outside, and the top end of the installation passage cavity is 5-10 cm higher than the ground when the test piece cable and the reference electrode cable are buried;
s3: arranging the corrosion parameter testing unit in the same environment as the buried metal pipeline to be tested;
s4: carrying out corrosion parameter testing;
s5: the corrosion parameter testing unit is disassembled and assembled, and the long-acting reference electrode is convenient to maintain or replace.
As for the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner, where the S4 specifically is:
the test specimen cable is electrically connected with the pipeline through the test pile, and the natural corrosion potential, the cathodic protection polarization potential, the alternating current interference voltage, the alternating current density, the direct current density and the corrosion rate of the test specimen can be obtained through measurement, so that the effectiveness, the alternating current and direct current interference degree and the corrosion risk of the metal pipeline cathodic protection system to be tested are judged.
As to the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner, where the S5 specifically includes:
1) taking the long-acting reference electrode out of the mounting passage cavity, connecting the reference electrode with the supporting handle through threads, and taking the reference electrode down from the supporting handle for maintenance or replacement;
2) and taking the corrosion parameter testing unit out of the mounting passage cavity, taking down the to-be-tested piece for replacement, mounting the replaced to-be-tested piece back into the mounting passage cavity, and carrying out corrosion product detection, corrosion morphology observation and corrosion rate test on the taken-down to-be-tested piece.
Compared with the prior art, the invention can obtain the following technical effects:
the multifunctional corrosion parameter testing unit and the long-acting reference electrode in the split type structure of the buried pipeline corrosion parameter testing probe are convenient to replace or maintain, the multifunctional corrosion parameter testing unit simulates the damage point of an anti-corrosion layer of a buried metal pipeline to be tested, and the cathodic protection level, the interference degree and the corrosion risk of the buried metal pipeline are obtained by testing the cathodic protection state, the alternating current and direct current interference condition and the corrosion rate of a test piece. The corrosion parameter testing unit can accurately measure parameters such as natural corrosion potential, cathodic protection energization potential, cathodic protection polarization potential, alternating current density, direct current density, corrosion rate and the like of the buried metal pipeline. In addition, the processing and manufacturing process scheme of the buried pipeline corrosion parameter testing probe split type structure is feasible, the quality is easy to control, and the buried pipeline corrosion parameter testing probe split type structure is convenient for batch production.
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 front view of a split type device of a corrosion parameter testing probe for a buried pipeline according to an embodiment of the present invention;
fig. 2 is a top view of a split type device of a corrosion parameter testing probe for a buried pipeline according to an embodiment of the invention.
Wherein, in the figure:
the test device comprises a sealing cover 1, an installation passage cavity 2, an insulating shell 3, a test piece base 4, a test piece 5, a test piece cable 6, a reference electrode cable 7, a supporting handle 8 and a reference electrode 9.
[ 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 split type device and a test method for a buried metal pipeline corrosion parameter test probe, aims to overcome the problems that a cathode protection test probe cannot obtain a corrosion rate, a corrosion inspection sheet and a long-acting reference electrode are difficult to replace or maintain after being buried, and the like, and provides a split type structure and a field use method for the buried metal pipeline corrosion parameter test probe. The cathode protection state, the AC/DC interference condition and the corrosion rate of the buried metal pipeline are obtained through the corrosion parameter test probe, so that the cathode protection level, the AC/DC interference degree and the corrosion risk of the buried pipeline are judged.
As shown in fig. 1 and 2, the split device of the buried pipeline corrosion parameter testing probe of the present invention includes a sealing cover 1, an installation access cavity 2, an insulating housing 3, a test strip base 4, a test strip 5, a test strip cable 6, a reference electrode cable 7, a supporting handle 8, and a reference electrode 9. The mounting passage cavity is hollow and the top end of the mounting passage cavity is provided with a sealing cover; the detachable multifunctional corrosion parameter testing unit and the maintainable long-acting reference electrode are arranged in the installation path cavity, the installation path cavity and the sealing cover are made of insulating materials, such as polyvinyl chloride (PVC) or Polytetrafluoroethylene (PTFE), a testing test piece 5 is arranged in the test piece base 4 in an interference sealing mode and then is connected with the insulating shell 3 in a mechanical connection mode such as threaded connection, a testing test piece cable is electrically connected with a metal internal thread in the insulating shell through welding, only one metal surface of the testing test piece is exposed, the insulating sealing and the anticorrosion treatment are carried out on other surfaces and cable joints, and the testing test piece is made of the same material as a tested metal component; a cable 6 electrically connected with the test sample penetrates through the insulating shell, is converged with the reference electrode cable in the installation access cavity and then extends out of an opening on the side face of the installation access cavity; the reference electrode 8 is connected with the supporting handle in a mechanical connection mode, insulation sealing treatment is conducted on the connection position, the reference electrode cable 7 is electrically connected with the metal internal thread in the supporting handle in the installation passage cavity through welding and extends out of the opening in the side face of the installation passage cavity after being converged with the test strip cable, and the tightness of the cable penetrating out of the position is guaranteed in modes of insulating tape entanglement and the like after installation. And the cables 6 and 7 extend out of the installation access cavity 2 and then are connected with the test pile.
The shape, the exposed area and the like of the test specimen are determined according to the insulation condition of the anti-corrosion layer of the pipeline to be tested and test items.
The buried pipeline corrosion parameter testing probe split structure is buried near a buried metal pipeline to be tested, cables 6 and 7 are respectively connected to corresponding wiring ends of a testing pile, and the testing test block cable 6 is electrically connected with the buried pipeline to be tested through the testing pile. The on-site detection personnel can utilize the potential and current measuring instrument to carry out related tests on the buried pipeline corrosion parameter test probe. The potential measuring instrument is connected with the test strip cable 6 and the reference electrode cable 7 to measure the cathodic protection electrifying potential, and the cathodic protection polarization potential can be measured by an instant power-off method; connecting a current measuring instrument between a test specimen cable 6 and a buried pipeline cable in series, measuring alternating current and direct current flowing into a test specimen 5, further obtaining alternating current density and direct current density flowing through the test specimen according to the area of the test specimen, and burying a buried pipeline corrosion parameter testing probe in soil far away from a pipeline and an anode; the test piece is not electrically connected with the buried pipeline to be tested, and the natural corrosion potential of the test piece can be measured; the test strip can be taken out from the mounting passage cavity regularly for carrying out related tests such as corrosion products, corrosion rate and the like;
the measurement result can be used for judging the cathodic protection level, the alternating current and direct current interference degree and the corrosion risk of the buried metal pipeline.
Example (c):
(1) a cylindrical installation passage cavity is made of PVC, the total size of the cavity is phi 13 multiplied by 160cm, and the total size of the sealing cover is phi 13.2 multiplied by 3 cm;
(2) adopting linear cutting to process a cylindrical test piece with the dimension phi of 11.3 multiplied by 50mm, wherein the material of the test piece is the same as that of the buried pipeline to be measured;
(3) installing a cylindrical test piece in the test piece base in an interference sealing mode, wherein one 1cm of the cylindrical test piece2The bottom surface serves as a working surface, and a threaded rod is welded on the other bottom surface and is mechanically connected with the internal thread in the insulating shell;
(4) the cable electrically connected with the test block penetrates through the insulating shell to be connected with the outside through the installation passage cavity;
(5) connecting the long-acting copper/saturated copper sulfate reference electrode with a support handle in a mechanical connection mode, and connecting a cable electrically connected with the reference electrode with the outside through the support handle and the installation passage cavity;
(6) when the detachable multifunctional corrosion parameter testing unit and the maintainable long-acting reference electrode are arranged in the installation access cavity during field installation, and the cable wires of the detachable multifunctional corrosion parameter testing unit and the maintainable long-acting reference electrode extend out of the opening on the side surface of the installation cavity, so that the split structure of the buried pipeline corrosion parameter testing probe is obtained.
The buried pipeline corrosion parameter test probe split structure is arranged around a buried metal pipeline to be tested, so that the cathodic protection condition, the alternating current and direct current interference condition and the corrosion rate of the buried pipeline to be tested can be accurately measured.
The above detailed description is given to the split type device and the test method for the corrosion parameter test probe of the buried metal pipeline provided by the embodiment of the application. 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 (10)
1. The utility model provides a buried metal pipeline corrosion parameter test probe split type device which characterized in that, the device includes:
the mounting passage cavity is a cavity with a hollow interior;
the corrosion parameter testing unit is arranged in the installation passage cavity and comprises an insulating shell, a to-be-tested piece, a test piece base and a testing test piece cable, wherein the to-be-tested piece is arranged in the test piece base, the test piece base is detachably connected with the insulating shell, one end of the testing test piece cable is electrically connected with the to-be-tested piece, and the other end of the testing test piece cable is connected with the external environment;
the long-acting reference electrode is detachably arranged in the installation passage cavity,
the corrosion parameter testing unit and the long-acting reference electrode are mutually independent.
2. The device of claim 1, wherein the strip to be tested is hermetically and tightly mounted in the strip base, the strip base is made of an insulating material, and has a first metal conductive member inside, one end of the first metal conductive member is connected to the strip to be tested, the other end of the first metal conductive member is connected to the test strip cable, and the mechanical connection between the strip base and the insulating housing includes but is not limited to a threaded connection and a snap-fit connection.
3. The device of claim 2, wherein a second metal conductive member mechanically engaged with the test strip base is disposed inside the insulating housing, the test strip cable is inserted into the insulating housing, one end of the test strip cable is connected to the first metal conductive member through the second metal conductive member, and the other end of the test strip cable is connected to an external environment.
4. The device according to claim 2, wherein the corrosion parameter testing unit only exposes one metal surface of the piece to be tested, the other surfaces of the piece to be tested are insulated and sealed, the piece to be tested is in a circular or cylindrical shape, the exposed metal surface area is determined according to the insulating property of the anticorrosive coating of the tested pipeline, and the exposed metal surface area comprises but is not limited to 1cm2、6.5cm2、10cm2And 20cm2。
5. The device of claim 1, wherein the long-acting reference electrode comprises a reference electrode, a support handle and a reference electrode cable, a third metal conductive member is arranged inside the support handle, a metal terminal of the reference electrode is electrically connected with the third metal conductive member, the metal terminal of the reference electrode is mechanically connected with the support handle, the reference electrode cable is arranged inside the support handle in a penetrating way, one end of the reference electrode cable is electrically connected with the third metal conductive member, and the other end of the reference electrode cable extends out of the support handle to be connected with the external environment.
6. The apparatus of claim 1, wherein the corrosion parameter testing unit is used for testing parameters of natural corrosion potential, cathodic protection energization potential, cathodic protection polarization potential, AC interference voltage, strip power-off potential, AC current density, DC current density, and corrosion rate.
7. The device as claimed in claim 1, wherein the top end of the installation path cavity is provided with a sealing cover, and the hollow cavity and the sealing cover are made of insulating materials, including but not limited to polyvinyl chloride and polytetrafluoroethylene.
8. A method of testing corrosion parameters of a buried metal pipeline including the apparatus of any one of claims 1 to 7, the method comprising the steps of:
s1: determining the material, area and quantity of the test piece according to the material of the metal pipeline to be tested and the type and condition of the surface anticorrosive layer;
s2: providing a test probe split type device comprising an installation passage cavity, a corrosion parameter test unit and a long-acting reference electrode, wherein a test piece cable and a reference electrode cable are electrically connected with the outside, and the top end of the installation passage cavity is 5-10 cm higher than the ground when the test piece cable and the reference electrode cable are buried;
s3: arranging the corrosion parameter testing unit in the same environment as the buried metal pipeline to be tested;
s4: carrying out corrosion parameter testing;
s5: the corrosion parameter testing unit is disassembled and assembled, and the long-acting reference electrode is convenient to maintain or replace.
9. The method according to claim 8, wherein S4 is specifically:
the test specimen cable is electrically connected with the pipeline through the test pile, and the natural corrosion potential, the cathodic protection polarization potential, the alternating current interference voltage, the alternating current density, the direct current density and the corrosion rate of the test specimen can be obtained through measurement, so that the effectiveness, the alternating current and direct current interference degree and the corrosion risk of the metal pipeline cathodic protection system to be tested are judged.
10. The method according to claim 8, wherein the S5 specifically includes:
1) taking the long-acting reference electrode out of the mounting passage cavity, connecting the reference electrode with the supporting handle through threads, and taking the reference electrode down from the supporting handle for maintenance or replacement;
2) and taking the corrosion parameter testing unit out of the mounting passage cavity, taking down the to-be-tested piece for replacement, mounting the replaced to-be-tested piece back into the mounting passage cavity, and carrying out corrosion product detection, corrosion morphology observation and corrosion rate test on the taken-down to-be-tested piece.
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| CN113983361A (en) * | 2021-09-15 | 2022-01-28 | 北京市燃气集团有限责任公司 | 3PE anticorrosive coating peeling and shielding risk judging method and device based on test piece |
| CN113981453A (en) * | 2021-09-10 | 2022-01-28 | 北京市燃气集团有限责任公司 | Method and device for evaluating stray current corrosion risk of gas pipe network with cathodic protection |
| CN114016041A (en) * | 2021-11-08 | 2022-02-08 | 成都博瑞科传科技有限公司 | Oil-gas pipeline potential detection method and device for cathodic protection |
| CN114088614A (en) * | 2021-11-23 | 2022-02-25 | 国网山东省电力公司电力科学研究院 | Metal component soil corrosion in-situ detection sensor |
| CN114959716A (en) * | 2022-04-11 | 2022-08-30 | 国家石油天然气管网集团有限公司 | Stray current interference test probe for cathode protection pipeline and intelligent monitoring system |
| CN116678818A (en) * | 2023-04-17 | 2023-09-01 | 北京市鼎新新技术有限责任公司 | Portable testing tool and testing method for high corrosion risk point of buried gas pipeline |
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