CN102912356A - Multifunctional catholic protection test probe and test method - Google Patents
Multifunctional catholic protection test probe and test method Download PDFInfo
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Abstract
The invention discloses a multifunctional catholic protection test probe and a test method. The probe comprises an insulation shell, a test sample, a reference electrode and multiple cables, wherein the insulation shell is hollow and is internally provided with a sealed cavity, which is divided into an upper closed cavity and a lower closed cavity, the reference electrode is arranged in the lower cavity, and the insulation shell is manufactured by an insulation material; the test sample is arranged outside the insulation shell, and the test sample adopts a material, which is the same as a measured metal component; each of the multiple cables comprises a test sample cable and a reference electrode cable, one end of the corresponding cable is respectively electrically connected with the corresponding test sample and the reference electrode, and the other end of each corresponding cable is extended from the insulation shell. The test method is a test method, which is capable of testing a catholic protection effect and alternating current/direct current disturbance degree of underground or underwater metal structure by adopting the multifunctional catholic protection test probe.
Description
Technical field
The present invention relates to the Cathode protect testing technical field; be particularly related to Multifunctional cathode protection test probe and testing method, be mainly used in measuring the parameter such as spontaneous potential, galvanic protection polarized potential, alternating current density, galvanic current density of buried or underwater metal component.
Background technology
Galvanic protection is as preventing that a kind of cost-effective method buried or the underwater metal component corrosion is widely used; polarized potential is as the key parameter of galvanic protection; it has indicated the degree of cathodic polarization, is the important indicator of monitoring and controlling galvanic protection effect.The index of at present both at home and abroad estimating galvanic protection validity all adopts polarized potential or polarization value (polarized potential is with respect to the off-set value of spontaneous potential), so Measurement accuracy polarized potential and spontaneous potential have very important significance for the effective enforcement that guarantees cathode protection technology.
After the hardware employing galvanic protection, in a single day the mobile IR that produces in ionogen falls and can bring error to the measurement of polarized potential because of electric current, adopts galvanic protection simultaneously, be difficult to the spontaneous potential value of reentrying initial.Fall in order to eliminate IR, measure real pipeline polarized potential, often adopt instant cut-off method or test piece outage method.The instant cut-off method is to adopt special equipment to come moment to disconnect the method that cathodic protection current measures the pipeline polarized potential; All ground protection, sacrificial anodes that link to each other must disconnect on the instant cut-off method requirement pipeline, and a plurality of cathodic protectors also will disconnect simultaneously on the pipeline, the interference of the stray current that do not have at the test point place; Because these requirements are so that the instant cut-off method often can be because of a lot of inconvenient being difficult to carry out in Practical Project; such as the situation that has a plurality of protections loop; be difficult to interrupt simultaneously a plurality of power units; even and when having stray current to disturb, adopt the instant cut-off method, also be difficult to measure real pipeline polarized potential.Test piece outage method is to bury a naked test piece underground at the test point place, and its material, to bury the state requirement underground identical with pipeline, test piece be connected hardware and connect with wire, simulated a tectal defective, provide protective current to polarize by hardware.Only need disconnect test piece during measurement and be connected the connection wire with hardware, just can record the test piece switch-off potential, represent the hardware current potential by the test piece current potential, thereby avoid cutting off the trouble of main protection electric current and other electrical connections; But having under the stray current disturbed condition, owing to flow in the ionogen of stray current between test piece and reference electrode, also can bring measuring error, still can't obtain accurately polarized potential this moment.And the environmental aspect around some hardware such as the buried steel pipeline is comparatively complicated at present; particularly the interference of alternating current-direct current stray current is very general, how to measure real pipeline cathode protection polarized potential and just seem particularly important under this disturbed condition.
In order to solve this measurement difficult problem, need the special-purpose testing tool of exploitation.NACE TM 0497 points out " if having stray current or sacrificial anode directly to link to each other with pipeline or have external forced current flow devices and not interruptible words; be difficult to obtain desirable measuring result; measuring result can't be analyzed in other words, have to adopt dedicated probe to come the real potential of measuring channel ".Polarization-testing probe is that will polarize test piece and reference electrode form in an insulation shell jointly, eliminate stray current to the impact of measuring result by rational structure design, in order to record accurately test piece polarized potential to polarization the further developing of test piece.Although the potential measurement of polarized probe method was also clearly included among China GB GB/T 21246-2007 " buried steel pipeline cathode protecting parameter measuring method " in 2008: " disturbed by stray current or pipeline that can't the sync break protective current; to measure burial place place's pipe protection current potential with polarized probe ", but because the research and development on the galvanic protection polarized probe are started late both at home and abroad, relevant report is less, available product seldom in the market, and find by investigation and practical application, domestic existing polarized probe product is in structure, performance, all there are many deficiencies in life-span and function aspects, as: test probe is limited work-ing life, can not satisfy the actual production requirement; Built-in electrolytic solution can produce detrimentally affect to the test sample surface; Polarization test piece meeting produces the spontaneous corrosion test piece to be disturbed; Test function is limited etc.
Around the problems that at present buried or underwater metal component galvanic protection test exists, carried out correlative study.Simultaneously because at present along with the energetically construction of the Infrastructure such as subway, electric power railway, ultra-high-tension power transmission line, the alternating current-direct current stray current interference problem that hardware suffers becomes increasingly conspicuous.As important parameter alternating current density and the galvanic current density of estimating alternating current-direct current stray current corrosion; there is not at present special-purpose testing tool; so the measurement function of AC and DC current density is integrated in the test probe, has developed on this basis Multifunctional cathode protection test probe.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned problems of the prior art, and a kind of cathode protection testing probe and a kind of testing method of effectively measuring buried or underwater metal component galvanic protection polarized potential, spontaneous potential, alternating current density, galvanic current density and other corrosion parameters is provided.Obtain buried or underwater metal component cathode protecting parameter and alternating current-direct current stray current interference parameter by test probe, thereby judge galvanic protection level and the alternating current-direct current stray current annoyance level that reaches.
For achieving the above object, the invention provides a kind of Multifunctional cathode protection test probe, this probe comprises: insulation shell, test sample, reference electrode, multi-cable; Described insulation shell inside is the cavity of hollow and sealing, is divided into upper cavity and the lower chamber of sealing, and at the inner reference electrode of installing of described lower chamber, described insulation shell is made by insulating material; The described test sample of described insulation shell outer setting, described test sample adopts the material identical with the survey hardware; Described multi-cable comprises test sample cable and reference electrode cable, and an end of respective cable links to each other with reference electrode difference electricity with corresponding test sample, and the other end of each respective cable stretches out from described insulation shell.
Described insulating material is polyvinyl chloride (PVC) or tetrafluoroethylene (PTFE).
Filling electrolyte in the cavity between described insulation shell lower chamber inwall and described reference electrode is installed little end-blocking that oozes in insulation shell bottom, described electrolytic solution oozes end-blocking and outside atmosphere is connected by little.
According to one aspect of the invention, described test sample is electrically connected with the test sample cable by mechanical connection manner, and connecting portion is solid and reliable; Test sample only exposes a metal covering, the equal insulated enclosure in other surfaces and cable junction.
Described mechanical connection manner is welding.
According to one aspect of the invention, test sample is installed on the insulation shell bottom, the test sample cable that is connected with test sample passes the insulation shell lower chamber, stretched out by the insulation shell top after in upper cavity, converging with the reference electrode cable, guarantee the stopping property of test sample and insulation shell installation position, adopt the interference sealing.
According to one aspect of the invention, described test sample arranges one or more, and shape is chosen as circle, square or annular, and the exposing metal area is determined according to pipe under test preservative coat situation and test event, for the 3PE preservative coat or be used for the alternating current density measurement, exposed area is got 1cm
2
Described reference electrode can be selected solid reference electrode or liquid reference electrode, reference electrode one end contacts with ionogen, the other end passes the insulation shell lower chamber, in upper cavity, be electrically connected with cable by mechanical connection or welding process, connecting portion is carried out insulated enclosure, stretches out from the insulation shell top after the reference electrode cable that links to each other with reference electrode and test sample cable converge.
According to one aspect of the invention, if described test sample is selected ring specimen, little center that end-blocking or reference electrode end should be positioned at ring specimen of oozing of then popping one's head in.
In insulation cavity upper cavity, fill the insulated enclosure material.
According to one aspect of the invention, if when being used for soil or fresh water environment reference electrode and being copper/copper/saturated copper sulphate reference electrode or saturated calomel reference electrode, electrolytic solution is metabisulfite solution.
According to one aspect of the invention, be silver/silver chloride reference electrode or zinc reference electrode if be used for the briny environment reference electrode, electrolytic solution is Klorvess Liquid, sodium chloride solution or natural sea-water.
According to one aspect of the invention, described little end-blocking that oozes is installed on the insulation shell bottom, guarantee the stopping property of installation position, adopts the interference sealing, guarantees that electrolytic solution oozes out by little end-blocking that oozes, rather than leaks by the not good position of sealing is installed.
According to one aspect of the invention, described little end-blocking that oozes adopts the porous permeable material to make.
According to one aspect of the invention, described porous permeable material is the micropore ceramics material.
The present invention also provides a kind of testing method buried or underwater metal component galvanic protection effect and alternating current-direct current stray current annoyance level of testing, and may further comprise the steps:
(1) according to hardware material to be tested, top coat type and situation, determine test sample material, area and quantity, the Multifunctional cathode protection test probe that comprises test sample, reference electrode, multi-cable and insulation shell is provided, and test sample and reference electrode are electrically connected with extraneous by cable;
(2) Multifunctional cathode protection test probe is arranged under the Working environment identical with hardware to be measured;
(3) cable of Multifunctional cathode protection test probe links to each other with detective pole; can obtain spontaneous potential, galvanic protection polarized potential, alternating current density and the galvanic current density of test sample by measuring, thereby validity and the annoyance level of hardware cathodic protection system to be measured judged.
Described testing method has adopted aforesaid Multifunctional cathode protection test probe.
Multifunctional cathode protection test probe of the present invention has been simulated the coating leak source of hardware to be measured, galvanic protection level and annoyance level that cathode protecting parameter and the alternating current-direct current stray current interference parameter by test sample obtains buried or underwater metal component.The reference electrode that adopts and electrolytic solution can not affect the condition of surface of test sample, can guarantee stability and the accuracy measured.The parameters such as the spontaneous potential when this cathode protection testing probe can be measured accurately buried or underwater metal component and passes through the electrolyte environment of different physical property, cathodic protection potential, alternating current density, galvanic current density.In addition, Multifunctional cathode protection test probe processing technology thereof scheme of the present invention is feasible, and quality is easy to control, is convenient to batch production.
Description of drawings
Fig. 1 is the synoptic diagram of Multifunctional cathode protection test probe one embodiment of the present invention;
Fig. 2 is the synoptic diagram of another embodiment of Multifunctional cathode protection test probe of the present invention;
Fig. 3 is the synoptic diagram of the another embodiment of Multifunctional cathode protection test probe of the present invention;
Embodiment
Describe the present invention in detail as an example of specific embodiment example below in conjunction with accompanying drawing.But, the scope that these embodiment do not limit the present invention in any way.
As shown in Figure 1, Multifunctional cathode protection test probe of the present invention comprises insulation shell 11, test sample 12,13, the little end-blocking 14 that oozes, reference electrode 15, electrolytic solution 16 and cable 17,18,19.Insulation shell is the cavity of hollow and sealing, can be right cylinder, cubes or rectangular parallelepiped, is divided into up and down two cavitys; The inner reference electrode 15 of installing of lower chamber, described insulation shell is made by insulating material, for example polyvinyl chloride (PVC) or tetrafluoroethylene (PTFE), filling electrolyte 16 in the cavity between reference electrode and lower chamber inwall; Electrolytic solution is connected with outside atmosphere by the little end-blocking 14 that oozes that is installed in the insulation shell bottom; In insulation shell bottom by interference sealing means installation testing sample 12,13, test sample is electrically connected with cable by the mechanical connection manner such as welding, each test sample all only exposes a metal covering, insulated enclosure and rotproofing are carried out in other surfaces and cable junction, and described test sample adopts the material identical with the survey hardware; The cable 17,18 that is connected with test sample passes the electrolytic solution in the insulation shell lower chamber, enter upper cavity, stretched out by the insulation shell top after in upper cavity, converging with the reference electrode cable, adopt the interference sealing to guarantee the stopping property of test sample and insulation shell installation position; Reference electrode 15 directly contacts with electrolytic solution 16, in upper cavity, adopt mechanical connection manner that reference electrode 15 is electrically connected with respective cable 19, carry out the insulated enclosure rotproofing at connecting portion, cable 19 stretches out from the insulation shell top after converging with the test sample cable in upper cavity, fills the insulated enclosure material in the upper cavity and guarantees that cable passes insulation shell position stopping property.Cable 17,18,19 finally extends test probe insulation shell 11, can be arranged on hardware to be measured near detective pole link to each other.
Described test sample 12,13 can arrange one or more, and shape is chosen as circle, square or annular, and the exposing metal area determines according to pipe under test preservative coat situation and test event, and for the 3PE preservative coat or be used for the alternating current density measurement, exposed area is got 1cm
2
Described reference electrode 15 can be selected solid reference electrode or liquid reference electrode.
If when being used for soil or fresh water environment reference electrode 15 and being copper/copper/saturated copper sulphate reference electrode or saturated calomel reference electrode, electrolytic solution 16 is metabisulfite solution.
If being used for briny environment reference electrode 15 is silver/silver chloride reference electrode or zinc reference electrode, electrolytic solution 16 is Klorvess Liquid, sodium chloride solution or natural sea-water.
Described little end-blocking 14 that oozes is installed on the insulation shell bottom, guarantee the stopping property of installation position, adopts the interference sealing, guarantees that electrolytic solution 16 oozes out by little end-blocking that oozes, rather than leaks by the not good position of sealing is installed.
Described little porous permeable material that oozes end-blocking 14 employing such as micropore ceramics materials is made.
Multifunctional cathode protection test probe according to the present invention is embedded near the hardware to be measured; and probe cable 17,18,19 is connected respectively on the different connection terminal of detective pole; test sample cable 17 and hardware to be measured are linked together by the detective pole connection terminal, provide galvanic protection to test sample 12.The tester can utilize existing current potential and current instruments to test.By the cable 19 of connecting test probe reference electrode 15 and the cable 17 of test sample 12 can record the galvanic protection polarized potential respectively with the potential measurement instrument, the potential measurement instrument is connected respectively the cable 19 of reference electrode 15 and the cable 18 of test sample 13, can record spontaneous potential; Current instruments are serially connected between the cable 17 and buried pipeline cable of test sample; can record the alternating current and the galvanic current that flow to test sample 12; thereby obtain alternating current density and galvanic current density, can galvanic protection level and the stray current annoyance level of buried or underwater metal component be judged by the above results.
In another scheme of the present invention as shown in Figure 2, Multifunctional cathode protection test probe comprises insulation shell 21, test sample 22,23,24,25, the little end-blocking 26 that oozes, reference electrode 27, electrolytic solution 28 and cable 29,210,211,212,213.Insulation shell is hollow cavity, can be right cylinder, cubes or rectangular parallelepiped, is divided into up and down two cavitys; Inner reference electrode 27, the filling electrolyte 28 in the cavity between reference electrode and lower chamber inwall installed of lower chamber; Electrolytic solution littlely oozes end-blocking 26 and outside atmosphere is connected by what be installed in insulation shell bottom; By interference sealing means installation testing sample 22,23,24,25, test sample is electrically connected with cable by welding process in the insulation shell bottom, and each test sample all only exposes a metal covering, and other surfaces and cable junction are carried out insulating corrosion and processed; The cable 29,210,211,212 that is connected with test sample passes the electrolytic solution in the insulation shell lower chamber, is stretched out by the insulation shell top after converging with the reference electrode cable in upper cavity; Reference electrode 27 directly contacts with electrolytic solution 28, in upper cavity, adopt mechanical connection manner that reference electrode 27 is electrically connected with respective cable 213, in upper cavity, fill the insulated enclosure material, guarantee that the cable connecting part position has good insulating corrosion and processes, stretch out from the insulation shell top after reference electrode cable 213 and the test sample cable that links to each other with reference electrode converges.Cable 29,210,211,212,213 finally extends test probe insulation shell 21, can be arranged on hardware to be measured near detective pole link to each other.
Multifunctional cathode protection test probe according to the present invention is embedded near the hardware to be measured; and probe cable 29,210,211,212,213 is connected respectively on the different connection terminal of detective pole; test sample cable 29 and hardware cable to be measured are linked together by the detective pole connection terminal, provide galvanic protection to test sample 22.The tester can utilize existing current potential and current instruments to test.By the reference electrode cable 213 of connecting test probe reference electrode 27 and the test sample cable 29 of test sample 22 can record the galvanic protection polarized potential respectively with the potential measurement instrument, the potential measurement instrument is connected respectively the reference electrode cable 213 of reference electrode 27 and the test sample cable 210 of test sample 23, can record spontaneous potential; The ac current measurement instrument is serially connected between the test sample cable 211 and hardware to be measured of test sample, can records the alternating current that flows to test sample 24; The measuring instrument for direct current table is serially connected between the test sample cable 212 and hardware cable to be measured of test sample, can records the galvanic current that flows to test sample 25; Thereby obtain alternating current density and galvanic current density.Can galvanic protection level and the stray current annoyance level of hardware to be measured be judged by the above results.
In another scheme of the present invention as shown in Figure 3, Multifunctional cathode protection test probe comprises insulation shell 31, test sample 32,33, reference electrode 34, insulated enclosure material 35 and cable 36,37,38.Insulation shell is hollow cavity, can be right cylinder, cubes or rectangular parallelepiped, is divided into up and down two cavitys; Lower chamber is divided into again inside and outside two cavitys, and inner chamber is the circular cylindrical cavity that directly is communicated with the external world, the inner reference electrode 34 of installing; Exocoel is closed cavity, the inner insulated enclosure material 35 of filling; By interference sealing means installation testing sample 32,33, test sample is electrically connected with cable by welding process in insulation shell outer chamber bottom, and each test sample all only exposes a metal covering, and other surfaces and cable junction are carried out insulating corrosion and processed; The test sample cable 36,37 that is connected with test sample passes the insulation shell outer chamber, is stretched out by the insulation shell top after converging with the reference electrode cable in upper cavity; Reference electrode 34 directly is exposed to the cavity outside, the upper end penetrates upper cavity, in upper cavity, adopt mechanical connection manner that reference electrode 34 is electrically connected with corresponding reference electrode cable 38, carry out insulating corrosion at connecting portion and process, the reference electrode cable 38 that links to each other with reference electrode stretches out from the insulation shell top after converging with the test sample cable in upper cavity.Cable 36,37,38 finally extends test probe insulation shell 31, can be arranged on hardware to be measured near detective pole link to each other.
Multifunctional cathode protection test probe according to the present invention is embedded near the hardware to be measured; and probe cable 36,37,38 is connected respectively on the different connection terminal of detective pole; test sample cable 36 and hardware cable to be measured are linked together by the detective pole connection terminal, provide galvanic protection to test sample 32.The tester can utilize existing current potential and current instruments to test.By the reference electrode cable 38 of connecting test probe reference electrode 34 and the test sample cable 36 of test sample 32 can record the galvanic protection polarized potential respectively with the potential measurement instrument, the potential measurement instrument is connected respectively the reference electrode cable 38 of reference electrode 34 and the test sample cable 37 of test sample 33, can record spontaneous potential; Current instruments are serially connected between the test sample cable 36 and hardware cable to be measured of test sample; can record the alternating current and the galvanic current that flow to test sample 32; thereby obtain alternating current density and galvanic current density, can galvanic protection level and the stray current annoyance level of buried or underwater metal component be judged by the above results.
Example:
(1) the cylindrical insulation shell that adopted UPVC pipe and sheet processing and fabricating, the housing overall size is Φ 110 * 230mm, and housing comprises up and down two isolated cavitys, and wherein lower chamber is of a size of Φ 110 * 200mm, and upper cavity is of a size of Φ 110 * 30mm;
(2) two cylindrical samples of employing line cutting processing Φ 11.3 * 5mm, material is identical or close with this applied pipeline mother metal of popping one's head in; A 1cm of cylindrical sample
2Working face is served as in the bottom surface, and cabtyre cable on another bottom surface is carried out insulating corrosion to tie point and processed; Adopt the interference sealing means that 2 cylindrical samples are installed on the insulation shell bottom, only keep 2 1cm
2The working metal face, remaining surface all seals; Link to each other with two samples two the bundle cables pass lower chamber, upper cavity respectively with split conductor cable in two core mechanical connections;
(3) the cylindrical micropore ceramics material with aperture 1～2um, porosity 10%, size Φ 5 * 10mm adopts the interference sealing means to be installed on the middle position of two samples, insulation shell bottom;
(4) long-acting copper/copper/saturated copper sulphate reference electrode is installed in the housing lower chamber by the mechanical connection bonding way, the copper core of long-effect copper sulfate reference electrode passes the up and down UPVC baffle plate between the cavity, in upper cavity with split conductor cable in a core mechanical connection;
(5) filling with concentration by the liquid filling hole on the UPVC baffle plate between the cavity up and down in lower chamber is 10% metabisulfite solution, adopts special-purpose stopper to carry out shutoff liquid filling hole after solution is filled with;
(6) tie point with sample and reference electrode and split conductor cable is fixed in the upper cavity, and in upper cavity infusion epoxy resin, be cured; Behind epoxy resin cure, adopt the UPVC top cover with the upper cavity shutoff, split conductor cable passes the upper cavity top cover by the mechanical seal mode, namely obtains operable Multifunctional cathode protection test probe.
A plurality of probes as above are set near hardware to be measured, just can be well understood to galvanic protection situation and the stray current disturbed condition of whole hardware to be measured.
With reference to specific embodiment, although the present invention is illustrated in specification sheets and accompanying drawing, but should be appreciated that affiliated technical field personnel can make multiple change and the alternative wherein Various Components of multiple equivalent in the situation that does not break away from the scope of the invention defined in the claim.And, the combination of the technical characterictic between the multiple specific embodiment, element and/or function and collocation herein is clear distinct, therefore according to these disclosed contents, technical characterictic, element and/or function that affiliated technical field personnel can understand among the embodiment can be incorporated in another specific embodiment according to circumstances, unless foregoing has other description.In addition, according to instruction of the present invention, in the scope that does not break away from essence of the present invention, adapt to special situation or material and can make many changes.Therefore, the present invention is not limited to accompanying drawing institute diagrammatic other specific embodiment, and the conduct described in the specification sheets is at present for implementing the specific embodiment of the contemplated preferred forms of the present invention, and intention of the present invention comprises all embodiments that fall in above-mentioned specification sheets and the appended claim scope.
Claims (17)
1. Multifunctional cathode protection test probe is characterized in that this probe comprises:
Insulation shell, test sample, reference electrode, multi-cable;
Described insulation shell inside is the cavity of hollow and sealing, is divided into upper cavity and the lower chamber of sealing, and at the inner reference electrode of installing of described lower chamber, described insulation shell is made by insulating material;
The described test sample of described insulation shell outer setting, described test sample adopts the material identical with the survey hardware;
Described multi-cable comprises test sample cable and reference electrode cable, and an end of respective cable links to each other with reference electrode difference electricity with corresponding test sample, and the other end of each respective cable stretches out from described insulation shell.
2. according to Multifunctional cathode protection test probe claimed in claim 1, it is characterized in that described insulating material is polyvinyl chloride (PVC) or tetrafluoroethylene (PTFE).
3. according to Multifunctional cathode protection test probe claimed in claim 1; it is characterized in that filling electrolyte in the cavity between described insulation shell lower chamber inwall and described reference electrode; little end-blocking that oozes is installed in insulation shell bottom, and described electrolytic solution oozes end-blocking and outside atmosphere is connected by little.
4. according to claim 1 or 3 described Multifunctional cathode protection test probes, it is characterized in that described test sample is electrically connected with the test sample cable by mechanical connection manner, connecting portion is solid and reliable; Test sample only exposes a metal covering, the equal insulated enclosure in other surfaces and cable junction.
5. according to Multifunctional cathode protection test probe claimed in claim 4, it is characterized in that described mechanical connection manner is welding.
6. according to claim 1 or 3 described Multifunctional cathode protection test probes; it is characterized in that test sample is installed on the insulation shell bottom; the test sample cable that is connected with test sample passes the insulation shell lower chamber; stretched out by the insulation shell top after in upper cavity, converging with the reference electrode cable; guarantee the stopping property of test sample and insulation shell installation position, adopt the interference sealing.
7. according to claim 1 or 3 described Multifunctional cathode protection test probes; it is characterized in that; described test sample arranges one or more; shape is chosen as circular or square; the exposing metal area is determined according to pipe under test preservative coat situation and test event; for the 3PE preservative coat or be used for the alternating current density measurement, exposed area is got 1cm
2
8. according to Multifunctional cathode protection test probe claimed in claim 1; it is characterized in that described reference electrode can select solid reference electrode or liquid reference electrode; reference electrode one end contacts with ionogen; the other end passes the insulation shell lower chamber; in upper cavity, be electrically connected with cable by mechanical connection or welding process; connecting portion is carried out insulated enclosure, stretches out from the insulation shell top after the reference electrode cable that links to each other with reference electrode and test sample cable converge.
9. according to claim 1 or 3 described Multifunctional cathode protection test probes, it is characterized in that, if test sample is selected ring specimen, little center that end-blocking or reference electrode end should be positioned at ring specimen of oozing of then popping one's head in.
10. according to Multifunctional cathode protection test probe claimed in claim 1, it is characterized in that in insulation cavity upper cavity, filling the insulated enclosure material.
11. according to Multifunctional cathode protection test probe claimed in claim 3, if when it is characterized in that being used for soil or fresh water environment reference electrode and being copper/copper/saturated copper sulphate reference electrode or saturated calomel reference electrode, electrolytic solution is metabisulfite solution.
12. according to Multifunctional cathode protection test probe claimed in claim 3, if it is characterized in that being used for the briny environment reference electrode is silver/silver chloride reference electrode or zinc reference electrode, electrolytic solution is Klorvess Liquid, sodium chloride solution or natural sea-water.
13. according to Multifunctional cathode protection test probe claimed in claim 3; it is characterized in that little end-blocking that oozes is installed on the insulation shell bottom, guarantee the stopping property of installation position, adopt the interference sealing; guarantee that electrolytic solution oozes out by little end-blocking that oozes, rather than leak by the not good position of sealing is installed.
14. according to Multifunctional cathode protection test probe claimed in claim 3, it is characterized in that described little end-blocking that oozes adopts the porous permeable material to make.
15. according to the described Multifunctional cathode protection test probe of claim 14, it is characterized in that described porous permeable material is the micropore ceramics material.
16. a testing method of testing buried or the effect of metal construction galvanic protection under water and alternating current-direct current annoyance level is characterized in that may further comprise the steps:
(1) according to hardware material to be tested, top coat type and situation, determine test sample material, area and quantity, the Multifunctional cathode protection test probe that comprises test sample, reference electrode, multi-cable and insulation shell is provided, and test sample and reference electrode are electrically connected with extraneous by cable;
(2) Multifunctional cathode protection test probe is arranged under the Working environment identical with hardware to be measured;
(3) cable of Multifunctional cathode protection test probe links to each other with detective pole; can obtain spontaneous potential, galvanic protection polarized potential, alternating current density and the galvanic current density of test sample by measuring, thereby validity and the annoyance level of hardware cathodic protection system to be measured judged.
17. in accordance with the method for claim 16, it is characterized in that, adopt such as each described Multifunctional cathode protection test probe among the claim 1-15.
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| CN111118502A (en) * | 2020-01-16 | 2020-05-08 | 西安热工研究院有限公司 | Small-caliber heat exchange tube cathode protection potential measuring device and using method |
| CN111118502B (en) * | 2020-01-16 | 2023-03-21 | 西安热工研究院有限公司 | Small-caliber heat exchange tube cathode protection potential measuring device and using method |
| CN112430817A (en) * | 2020-09-27 | 2021-03-02 | 北京科技大学 | Split type device and method for buried metal pipeline corrosion parameter test probe |
| CN112430817B (en) * | 2020-09-27 | 2021-10-22 | 北京科技大学 | Split type device and method for buried metal pipeline corrosion parameter test probe |
| CN112281165A (en) * | 2020-11-30 | 2021-01-29 | 广东腐蚀科学与技术创新研究院 | Multifunctional polarization probe for cathodic protection oil and gas pipeline and use method thereof |
| CN116973783B (en) * | 2023-09-22 | 2023-12-12 | 山东金科力电源科技有限公司 | Polar plate in-situ current potential measurement method |
| CN116973783A (en) * | 2023-09-22 | 2023-10-31 | 山东金科力电源科技有限公司 | Polar plate in-situ current potential measurement method |
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