CN202166630U - Multifunctional probe for monitoring corrosion and protection of water pipelines - Google Patents
Multifunctional probe for monitoring corrosion and protection of water pipelines Download PDFInfo
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- CN202166630U CN202166630U CN2011202569057U CN201120256905U CN202166630U CN 202166630 U CN202166630 U CN 202166630U CN 2011202569057 U CN2011202569057 U CN 2011202569057U CN 201120256905 U CN201120256905 U CN 201120256905U CN 202166630 U CN202166630 U CN 202166630U
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Abstract
The utility model discloses a multifunctional probe for monitoring corrosion and protection of water pipelines. The multifunctional probe comprises a probe bracket, as well as a first wiring terminal, a second wiring terminal, a third wiring terminal and a fourth wiring terminal which are fixed on the probe bracket, wherein a reference electrode, an auxiliary electrode, a first working electrode and a second working electrode are also arranged on the probe bracket; the first, the second, the third and the fourth wiring terminals are correspondingly in electric connection with the reference electrode, the auxiliary electrode, the first working electrode and the second working electrode respectively; and the probe bracket is mounted on a pipeline wall through a flange plate. The multifunctional probe including a natural corrosion three-electrode system and a cathode protection three-electrode system can monitor not only the corrosion property of the pipelines in both the power-on state and the natural state, but also the protection degree of the pipelines in the cathode protection state, and can monitor the corrosion state and the cathode protection degree of the pipelines by adopting different corrosion monitoring technologies, thereby accurately monitoring the natural corrosion state and the corrosion rate of the pipelines in a real time manner.
Description
Technical field
the utility model relates to aqueduct, particularly, relates to a kind of monitoring aqueduct corrosion and protection and uses multi-functional probe.
Background technology
fluid line is widely used in the conveying of various fluid foods in seawater, tap water and other fields; In national economy, play a part very important; But pipeline provides numerous whiles easily to us, and its etching problem has brought great potential safety hazard to pipeline transportation.
pipeline generally adopts anticorrosive paint, cathodic protection or The combined safeguard procedures that corrosion condition is controlled for increasing the service life.At present, the monitoring method for the corrosive pipeline state mainly comprises physical method and electrochemical method.Physical method is mainly reported situations through the variation of measuring physical propertys such as resistance that corrosion causes material, electromagnetism, heat conduction, sonic propagation.Mainly comprise: electric-resistivity method, eddy-current method, rays method, infrared thermal imagery method, acoustic-emission, ultrasound wave, impact-echo method and magnetic field etc.Because the essence of corrosive pipeline is electrochemical process,, be particularly suitable for the evaluation of etch state so electrochemical method except can position, degree and the speed of pipelines corrosion, also might obtain reflecting the information of corrosion process mechanism.Electrochemical method comes into one's own day by day in recent years; Obtain very big development; Become the conventional means of the non-destructive monitoring of metal erosion, mainly comprised: current potential, electrochemical impedance spectroscopy (ac impedance spectroscopy), polarization resistance, coulostatic method, electrochemistry noise, harmonic wave method etc.
are present, and the monitoring mode of corrosive pipeline is comparatively single, mainly all are to adopt the potential monitoring technology, but because the environmental aspect around the pipeline is comparatively complicated, adopt the single monitoring technology can not true embodiment Corrosion of Pipeline state.
The utility model content
The purpose of
the utility model provides a kind of multi-functional probe that can monitor the corrosion and protection state of pipeline in real time, truely and accurately.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
a kind of monitoring aqueduct corrosion and protection is used multi-functional probe; Comprise probe bracket, be fixedly installed on first binding post, second binding post, the 3rd binding post and the 4th binding post on the described probe bracket; Also be provided with contrast electrode, auxiliary electrode, first working electrode and second working electrode on the described probe bracket; Described first binding post, described second binding post, described the 3rd binding post and described the 4th binding post correspondence respectively are electrically connected to described contrast electrode, described auxiliary electrode, described first working electrode and described second working electrode, and described probe bracket is installed on the described duct wall through ring flange.
preferably; Described first binding post, described second binding post, described the 3rd binding post and described the 4th binding post are positioned at the same end of described probe bracket, and described contrast electrode, described auxiliary electrode, described first working electrode and described second working electrode are positioned at the other end of described probe bracket.
preferably; Described first binding post, described second binding post, described the 3rd binding post and described the 4th binding post are with described contrast electrode, described auxiliary electrode, described first working electrode and described second working electrode is corresponding one by one is connected through conductive lever; Be parallel to each other between four described conductive levers; Further, mutually insulated between four described conductive levers.
preferably; Described first working electrode is from corroding electrode; Described from corroding electrode, described contrast electrode and described auxiliary electrode formation spontaneous corrosion three-electrode system; Described second working electrode is the cathodic protection electrode, and described cathodic protection electrode, described contrast electrode and described auxiliary electrode constitute the cathodic protection three-electrode system.
further preferably, mutually insulated setting between described contrast electrode, described auxiliary electrode, described first working electrode and described second working electrode.
The beneficial effect of
the utility model is: spontaneous corrosion three-electrode system and cathodic protection three-electrode system are set on the probe; Not only can monitor Corrosion of Pipeline characteristic under the energising situation; And can monitor the corrosive property under the state of nature; Can also monitor the protection degree under the cathode protecting state; Simultaneously through different corrosion monitoring technology: the etch state and the cathodic protection degree of monitoring such as electrochemical impedance spectroscopy (ac impedance spectroscopy), polarization resistance, electrochemistry noise pipeline are tested, thereby can monitor the natural corrosion state and the corrosion rate of pipeline in real time, exactly.
Description of drawings
Accompanying drawing 1 is the schematic top plan view of the monitoring aqueduct corrosion and protection of the utility model with multi-functional probe;
Accompanying drawing 2 is the longitudinal component cut-open view of the monitoring aqueduct corrosion and protection of the utility model with multi-functional probe;
accompanying drawing 3 is the elevational schematic view of the monitoring aqueduct corrosion and protection of the utility model with multi-functional probe.
In
accompanying drawing: 1, probe bracket; 2, first binding post; 3, second binding post; 4, the 3rd binding post; 5, the 4th binding post; 6, contrast electrode; 7, auxiliary electrode; 8, first working electrode; 9, second working electrode; 10, conductive lever.
Embodiment
Below in conjunction with embodiment shown in the drawings the utility model is done following detailed description the in detail:
are shown in accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3; The monitoring aqueduct corrosion and protection of the utility model with multi-functional probe comprise probe bracket 1, be fixedly installed on first binding post 2 on the probe bracket 1, second binding post 3, the 3rd binding post 4 and the 4th binding post 5; Also be provided with contrast electrode 6, auxiliary electrode 7, first working electrode 8 and second working electrode 9 on the probe bracket 1; First binding post 2, second binding post 3, the 3rd binding post 4 and the 4th binding post 5 correspondence respectively are electrically connected to contrast electrode 6, auxiliary electrode 7, first working electrode 8 and second working electrode 9; Probe bracket 1 is installed on the duct wall through ring flange; First binding post 2, second binding post 3, the 3rd binding post 4 and the 4th binding post 5 are positioned at the same end of probe bracket 1; Contrast electrode 6, auxiliary electrode 7, first working electrode 8 and second working electrode 9 are positioned at the other end of probe bracket 1; First binding post 2, second binding post 3, the 3rd binding post 4 and the 4th binding post 5 are with contrast electrode 6, auxiliary electrode 7, first working electrode 8 and second working electrode 9 is corresponding one by one is connected through conductive lever 10; Be parallel to each other between four conductive levers 10; Further, mutually insulated between four conductive levers 10, mutually insulated setting between contrast electrode 6, auxiliary electrode 7, first working electrode 8 and second working electrode 9.
wherein; First working electrode 8 is from corroding electrode; Constitute the spontaneous corrosion three-electrode system from corroding electrode, contrast electrode 6 with auxiliary electrode 7; Second working electrode 9 is the cathodic protection electrode, and cathodic protection electrode, contrast electrode 6 and auxiliary electrode 7 constitute the cathodic protection three-electrode system.
The monitoring aqueduct corrosion and protection of the utility model is with the principle of work of multi-functional probe:
The corrosion factor that exists on
structure: the corrosion of aqueduct in Korrosionsmedium is because the instability and the electrochemical nonuniformity of its structural constituent cause.From outside watch, the material of metal is a homogeneous, still; Immerse in the liquid when it,, form the anodic site and the cathodic area of many macroscopic views or microcosmic in the metal surface owing to the unevenness of institutional framework of metal material own and surface physics state; Produce little electric current through liquid between negative electrode and the anode, electronics moves to the cathodic area from the anodic site, and the anodic site part metals loses electronics becomes ion; Be dissolved in the liquid, make that the anodic site metal is corroded.For whole pipe, this slightly the electric current superposition get up to reach considerable quantity.
cathodic protection: cathodic protection is to quilt protection metal construction cathodic protection current to be provided, and makes it cathodic polarization, thereby eliminates a kind of method of galvanic corrosion.Corrosion of metal is caused by electrochemical reaction in liquid, if can stop this electrochemical reaction, just can suppress the galvanic corrosion of metal.When metal carried out cathodic polarization, through the cathode current of cathode surface, major part preferentially flow to the anodic site; Thereby reduced original current potential, made it cathodic polarization, along with the increase of electric current; The negative polarization in cathodic area, metal surface also increases, and when the potential difference (PD) that is polarised to cathodic area and anodic site was zero, corrosion current disappeared; Thereby suppressed corrosion process, reached the purpose of protection.Cathodic protection is the effective measures that prevent above corrosion, and through applying cathodic protection current, when making potential polarization to the protective potential range of above-mentioned hardware, metal material will stop corrosion in the WS.
The monitoring aqueduct corrosion and protection of
the utility model is with the new technique of multi-functional probe as a kind of monitoring pipeline corrosion and protection state; Can adopt multiple different detection technique: etch state test, electrochemical impedance spectroscopy (ac impedance spectroscopy), polarization resistance, coulostatic method, electrochemistry noise etc., the etch state of monitoring pipeline and the test of cathodic protection degree.
etch state test: have corresponding relation between the corrosion potential of metal or alloy and their etch state; Through detecting contrast electrode 6 and the potential difference (PD) between corroding electrode or cathodic protection electrode; Can obtain not apply cathodic protection electrode spontaneous potential and apply the electrode protection current potential of cathodic protection, can obtain the etch state of the pairing material of current potential testing result by pH-Electric Potential Graph.
The test of protection degree:
A) linear polarization method is measured the spontaneous corrosion electric current
Three-electrode system (contrast electrode 6, auxiliary electrode 7 with from corroding electrode) is adopted in
; Near the corrosion potential of corroding electrode, polarizing, the relation of utilizing near corrosion current and the polarization curve slope corrosion potential to be inversely proportional to is asked corrosion rate.Linear polarization technique is fast to the response that the corrosion situation changes, the instantaneous general corrosion speed of The real time measure metal, also tracking equipment corrosion speed and variation continuously in time rapidly and sensitively.In addition, can also the information of equipment generation pitting or other local corrosion be provided according to the asymmetry of the response current under identical anode and cathode polarization condition.
) the electrochemical impedance spectrometry measures the corrosion current under the cathode protecting state
Faraday's process, space charge and the electronics of system and the conductive process of ion are represented with ideal element (like resistance and electric capacity etc.) in
, explain that the microscopic property of non-homogeneous state material distributes.The galvanochemistry three-electrode system that is in stable state is applied an infinitesimal sine wave disturbance, can obtain to apply the corrosion current of the cathodic protection electrode of cathodic protection.
) the protection degree
The protection degree by a), b) data that record calculate according to following formula:
In the formula:
η-protection degree;
Icorr-spontaneous corrosion electric current;
Corrosion current under
icp-cathode protecting state.
The test of
coating situation: coating is with the pipeline prolongation of working time; Can show aging with damaged trend; Closely related with the system electrochemical parameter, electrochemical impedance spectroscopy can accurately be diagnosed the various variable condition of coating through spectrogram intuitively.
single detection probe of the prior art can not be truly, the comprehensive etch state of reacting pipe.
adopt the multifunctional monitoring probe of the utility model can carry out regular multi-faceted information measurement and monitoring; Thereby the aging and damaged situation of Corrosion of Pipeline characteristic, the Corrosion of Pipeline characteristic that applies cathodic protection system and coating under the comprehensive evaluation state of nature obtains monitoring to guarantee its pipeline in whole serviceable life.Adopt multi-functional corrosion probe not only to realize the prison of pipeline is detected, thereby relatively independent system diagnostics information is provided, can guarantee the stability and actual effect (reliably) property of pipeline cathode protection system simultaneously, and provide pipeline many-sided corrosion information.
the foregoing description is only for explaining the technical conceive and the characteristics of the utility model; Its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection domain of the utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the utility model.
Claims (6)
1. a monitoring aqueduct corrosion and protection is used multi-functional probe; It is characterized in that: comprise probe bracket, be fixedly installed on first binding post, second binding post, the 3rd binding post and the 4th binding post on the described probe bracket; Also be provided with contrast electrode, auxiliary electrode, first working electrode and second working electrode on the described probe bracket; Described first binding post, described second binding post, described the 3rd binding post and described the 4th binding post correspondence respectively are electrically connected to described contrast electrode, described auxiliary electrode, described first working electrode and described second working electrode, and described probe bracket is installed on the described duct wall through ring flange.
2. monitoring aqueduct corrosion and protection according to claim 1 is used multi-functional probe; It is characterized in that: described first binding post, described second binding post, described the 3rd binding post and described the 4th binding post are positioned at the same end of described probe bracket, and described contrast electrode, described auxiliary electrode, described first working electrode and described second working electrode are positioned at the other end of described probe bracket.
3. monitoring aqueduct corrosion and protection according to claim 1 is used multi-functional probe; It is characterized in that: described first binding post, described second binding post, described the 3rd binding post and described the 4th binding post are with described contrast electrode, described auxiliary electrode, described first working electrode and described second working electrode is corresponding one by one is connected through conductive lever, are parallel to each other between four described conductive levers.
4. monitoring aqueduct corrosion and protection according to claim 3 is used multi-functional probe, it is characterized in that: mutually insulated between four described conductive levers.
5. monitoring aqueduct corrosion and protection according to claim 1 is used multi-functional probe; It is characterized in that: described first working electrode is from corroding electrode; Described from corroding electrode, described contrast electrode and described auxiliary electrode formation spontaneous corrosion three-electrode system; Described second working electrode is the cathodic protection electrode, and described cathodic protection electrode, described contrast electrode and described auxiliary electrode constitute the cathodic protection three-electrode system.
6. use multi-functional probe according to any described monitoring aqueduct corrosion and protection in the claim 1 to 5, it is characterized in that: mutually insulated setting between described contrast electrode, described auxiliary electrode, described first working electrode and described second working electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202569057U CN202166630U (en) | 2011-07-20 | 2011-07-20 | Multifunctional probe for monitoring corrosion and protection of water pipelines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202569057U CN202166630U (en) | 2011-07-20 | 2011-07-20 | Multifunctional probe for monitoring corrosion and protection of water pipelines |
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| Publication Number | Publication Date |
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| CN202166630U true CN202166630U (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202569057U Expired - Lifetime CN202166630U (en) | 2011-07-20 | 2011-07-20 | Multifunctional probe for monitoring corrosion and protection of water pipelines |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305817A (en) * | 2011-07-20 | 2012-01-04 | 苏州热工研究院有限公司 | Multi-functional probe for monitoring corrosion of water pipeline and protecting water pipeline |
| CN102721725A (en) * | 2012-06-04 | 2012-10-10 | 西安热工研究院有限公司 | Device and method for measuring corroding and cleaning effects on line in chemical cleaning process of power station boiler |
| CN103149146A (en) * | 2013-02-01 | 2013-06-12 | 厦门大学 | Multifunctional corrosion monitoring probe used for monitoring corrosion of industrial equipment |
| CN106442302A (en) * | 2016-09-18 | 2017-02-22 | 华中科技大学 | Monitoring method and device of polarization resistance and corrosion speed of surface of pipe wall of pipeline |
-
2011
- 2011-07-20 CN CN2011202569057U patent/CN202166630U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305817A (en) * | 2011-07-20 | 2012-01-04 | 苏州热工研究院有限公司 | Multi-functional probe for monitoring corrosion of water pipeline and protecting water pipeline |
| CN102721725A (en) * | 2012-06-04 | 2012-10-10 | 西安热工研究院有限公司 | Device and method for measuring corroding and cleaning effects on line in chemical cleaning process of power station boiler |
| CN103149146A (en) * | 2013-02-01 | 2013-06-12 | 厦门大学 | Multifunctional corrosion monitoring probe used for monitoring corrosion of industrial equipment |
| CN106442302A (en) * | 2016-09-18 | 2017-02-22 | 华中科技大学 | Monitoring method and device of polarization resistance and corrosion speed of surface of pipe wall of pipeline |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215004 West Ring Road, Jiangsu, Suzhou, No. 1788 Patentee after: Suzhou Nuclear Power Research Institute Co., Ltd. Patentee after: China General Nuclear Power Corporation Address before: 215004 West Ring Road, Jiangsu, Suzhou, No. 1788 Patentee before: Suzhou Nuclear Power Research Institute Co., Ltd. Patentee before: China Guangdong Nuclear Power Group Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120314 |