CN104726871A - Cathodic protection system test piece testing system and testing method - Google Patents
Cathodic protection system test piece testing system and testing method Download PDFInfo
- Publication number
- CN104726871A CN104726871A CN201510109481.4A CN201510109481A CN104726871A CN 104726871 A CN104726871 A CN 104726871A CN 201510109481 A CN201510109481 A CN 201510109481A CN 104726871 A CN104726871 A CN 104726871A
- Authority
- CN
- China
- Prior art keywords
- test piece
- reference electrode
- test
- pipe under
- cloudy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a cathodic protection system test piece testing system and testing method. The method comprises the following steps: electrically connecting a positive electrode of a high-resistance voltmeter with a testpost and a test piece and electrically connecting a negative electrode of the high-resistance voltmeter with a reference electrode; when the test piece is connected with a pipe to be tested, acquiring a switch-on potential of the test piece through the high-resistance voltmeter; when the specified polarization time is passed, disconnecting the test piece with the pipe to be tested, acquiring the switch-off potential of the test piece through the high-resistance voltmeter; acquiring the polarization value of the pipe to be tested according to the difference between the switch-off potential and the switch-on potential. By adopting a method for combining the test piece and the reference electrode, the testing cost is low and the excavation is unnecessary; simultaneously, a temporary reference electrode is adopted so that the pollution caused by the copper sulfate solution is avoided; the time polarization is not be waited, the switch-off potential is directly tested and the testing efficiency is increased.
Description
Technical field
The present invention relates to cathode protection technology field, in particular a kind of cloudy insurance system test piece test macro and testing method.
Background technology
Along with the development of petroleum industry; employing buried metal pipeline carries out a kind of important way that fuel gas transmission has become domestic natural gas conveying; in order to extend the work-ing life of pipeline to greatest extent; ensure the safe operation of pipeline; the galvanic protection efficiency of pipeline must be improved; improve cathode protection measure, and the monitoring of anticathode conservation status and to carry out accurate analysis to the data obtained most important.
But when at present potentiometric detection being carried out to the galvanic protection of pipeline, normal employing polarized probe method of testing.When adopting polarized probe method of testing, have following defect: difficulty is buried in polarized probe test underground, probe cost and excavation are costly; The reference electrode of polarized probe method is easily polluted by copper-bath, test data distortion; The polarized probe test polarization time is long, and tester's labour intensity is large.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of cloudy insurance system test piece test macro and testing method, be intended to solve in prior art and adopt polarized probe method of testing need be buried by polarized probe, easily contaminated and defect that the test duration is long.
Technical scheme of the present invention is as follows:
A kind of cloudy insurance system test piece test macro, wherein, comprising:
For the detective pole that pipe under test cathode protecting parameter detects;
For obtaining the high resistance voltmeter of current potential;
For providing the reference electrode of reference potential when measuring the electropotential of pipe under test;
For the test piece as pipe under test leak source surrogate;
Wherein, described detective pole is all electrically connected with pipe under test, high resistance voltmeter and test piece, and the other end of described high resistance voltmeter also connects with reference electrode electrical;
Described test piece is identical with the material of described pipe under test, and described test piece is identical at the landfill depth of underground with described pipe under test.
Described cloudy insurance system test piece test macro, wherein, described reference electrode is standard hydrogen electrode, copper-copper sulfate reference electrode, silver-silver chloride reference electrode, calomel reference electrode, any one in zinc reference electrode, manganese dioxide reference electrode or Graphite Electrodes.
Described cloudy insurance system test piece test macro, wherein, the area of described test piece is 51-60cm
2.
Described cloudy insurance system test piece test macro, wherein, the landfill depth of described reference electrode in underground is 10-30cm.
Described cloudy insurance system test piece test macro, wherein, described test piece and described pipe under test are steel matter.
A kind of cloudy insurance system test piece testing method, wherein, said method comprising the steps of:
S1, the positive pole of high resistance voltmeter to be all electrically connected with detective pole and test piece, and the negative pole of high resistance voltmeter and reference electrode electrical are connect;
S2, when test piece and pipe under test are connected, obtain the energising current potential of test piece by high resistance voltmeter;
S3, when after the polarization time of specifying, then test piece and pipe under test to be disconnected, and obtain the switch-off potential of test piece by high resistance voltmeter;
S4, obtain the polarization value of pipe under test according to the difference of described switch-off potential and described energising current potential;
Wherein, described test piece is identical with the material of described pipe under test, and described test piece is identical at the landfill depth of underground with described pipe under test.
Described cloudy insurance system test piece testing method, wherein, described reference electrode is standard hydrogen electrode, copper-copper sulfate reference electrode, silver-silver chloride reference electrode, calomel reference electrode, any one in zinc reference electrode, manganese dioxide reference electrode or Graphite Electrodes.
Described cloudy insurance system test piece testing method, wherein, the area of described test piece is 51-60cm
2.
Described cloudy insurance system test piece testing method, wherein, the landfill depth of described reference electrode in underground is 10-30cm.
Described cloudy insurance system test piece testing method, wherein, described test piece and described pipe under test are steel matter.
The invention provides a kind of cloudy insurance system test piece test macro and testing method, method comprises: be all electrically connected with detective pole and test piece by the positive pole of high resistance voltmeter, and the negative pole of high resistance voltmeter and reference electrode electrical is connect; When test piece and pipe under test are connected, obtained the energising current potential of test piece by high resistance voltmeter; When after the polarization time of specifying, then test piece and pipe under test are disconnected, and obtain the switch-off potential of test piece by high resistance voltmeter; The polarization value of pipe under test is obtained according to the difference of described switch-off potential and described energising current potential.The method that the present invention adopts test piece and reference electrode to combine, testing cost is low, does not need excavation; Simultaneously because adopting interim reference electrode, avoiding and being polluted by copper-bath; And without waiting time polarization, directly test switch-off potential, improve testing efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of cloudy insurance system test piece test macro of the present invention preferred embodiment.
Fig. 2 is the schema of cloudy insurance system test piece testing method of the present invention preferred embodiment.
Embodiment
The invention provides a kind of cloudy insurance system test piece test macro and testing method, for making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1, Fig. 1 is the structural representation of cloudy insurance system test piece test macro of the present invention preferred embodiment.As shown in Figure 1, described cloudy insurance system test piece test macro comprises:
For the detective pole 100 that pipe under test 10 cathode protecting parameter detects;
For obtaining the high resistance voltmeter 200 of current potential;
For providing the reference electrode 300 of reference potential when measuring the electropotential of pipe under test;
For the test piece 400 as pipe under test leak source surrogate;
Wherein, described detective pole 100 is all electrically connected with pipe under test 10, high resistance voltmeter 200 and test piece 400, and the other end of described high resistance voltmeter 200 is also electrically connected with reference electrode 300;
Described test piece 400 is identical with the material of described pipe under test 10, and described test piece 400 is identical at the landfill depth of underground with described pipe under test 10.During concrete enforcement, described test piece 400 is steel matter with described pipe under test 10, and the landfill depth of described reference electrode in underground is 10-30cm.
When cloudy insurance system test piece test macro carries out the potential test of pipe under test 10 as described in Figure 1 in employing, need first the positive pole of high resistance voltmeter 200 to be all electrically connected with detective pole 100 and test piece 400, and the negative pole of high resistance voltmeter 200 is electrically connected with reference electrode 300; When test piece 400 is connected with pipe under test 10, obtained the energising current potential of test piece 400 by high resistance voltmeter 200; When after the polarization time of specifying, then test piece 400 and pipe under test 10 are disconnected, and obtain the switch-off potential of test piece 400 by high resistance voltmeter 200; The polarization value of pipe under test 10 is finally obtained according to the difference of described switch-off potential and described energising current potential.
Wherein, test piece 400 landfill depth and backfill state identical with pipe under test 10.Before measuring, should confirm galvanic protection normal operation, test piece 400 is communicated with pipe under test 10, and pipe under test 10 and test piece 400 fully polarize.In measurement, the positive pole of high resistance voltmeter 200 is connect test piece 400, negative pole connects reference electrode 300, measures and records the energising current potential of test piece 400.
When after the polarization time of specifying, test piece 400 and pipe under test 10 are disconnected, measure immediately and record the switch-off potential of test piece 400.Measured switch-off potential, representative bury underground a little and test piece 400 with the polarized potential at homalographic deficiency of protection coating point place.Now, the polarization value of pipe under test 10 can be obtained according to the difference of described switch-off potential and described energising current potential.Visible, when adopting test piece test system and test, testing cost is low, does not need excavation; Simultaneously because adopting interim reference electrode, avoiding and being polluted by copper-bath; And without waiting time polarization, directly test switch-off potential, improve testing efficiency.
Area environment and construction time limit residing for preservative coat type, construction quality, pipeline of test piece 400 are determined.During concrete enforcement, the area of test piece 400 is generally at 51-60cm
2between.If test piece 400 area is too little, contact resistance and the pipe under test 10 holiday place difference of it and soil are excessive, and corrosive property also can be different.If test piece 400 potential measurement illustrates that this point protection meets code requirement, only represent the leak source that holiday point area on pipeline is less than test piece area and meet protection requirement, whether fully do not illustrate that holiday point area is greater than the holiday point protection of test piece area.
Further, described reference electrode is standard hydrogen electrode, copper-copper sulfate reference electrode, silver-silver chloride reference electrode, calomel reference electrode, any one in zinc reference electrode, manganese dioxide reference electrode or Graphite Electrodes.
Based on said system embodiment, present invention also offers a kind of cloudy insurance system test piece testing method, as shown in Figure 2, it comprises:
Step S100, the positive pole of high resistance voltmeter to be all electrically connected with detective pole and test piece, and the negative pole of high resistance voltmeter and reference electrode electrical are connect;
Step S200, when test piece and pipe under test are connected, obtain the energising current potential of test piece by high resistance voltmeter;
Step S300, when after the polarization time of specifying, then test piece and pipe under test to be disconnected, and obtain the switch-off potential of test piece by high resistance voltmeter;
Step S400, obtain the polarization value of pipe under test according to the difference of described switch-off potential and described energising current potential;
Wherein, described test piece is identical with the material of described pipe under test, and described test piece is identical at the landfill depth of underground with described pipe under test.
Further, in described cloudy insurance system test piece testing method, described reference electrode is standard hydrogen electrode, copper-copper sulfate reference electrode, silver-silver chloride reference electrode, calomel reference electrode, any one in zinc reference electrode, manganese dioxide reference electrode or Graphite Electrodes.
Further, in described cloudy insurance system test piece testing method, the area of described test piece is 51-60cm
2.
Further, in described cloudy insurance system test piece testing method, the landfill depth of described reference electrode in underground is 10-30cm.
Further, in described cloudy insurance system test piece testing method, described test piece and described pipe under test are steel matter.
In sum, the invention provides a kind of cloudy insurance system test piece test macro and testing method, method comprises: be all electrically connected with detective pole and test piece by the positive pole of high resistance voltmeter, and the negative pole of high resistance voltmeter and reference electrode electrical is connect; When test piece and pipe under test are connected, obtained the energising current potential of test piece by high resistance voltmeter; When after the polarization time of specifying, then test piece and pipe under test are disconnected, and obtain the switch-off potential of test piece by high resistance voltmeter; The polarization value of pipe under test is obtained according to the difference of described switch-off potential and described energising current potential.The method that the present invention adopts test piece and reference electrode to combine, testing cost is low, does not need excavation; Simultaneously because adopting interim reference electrode, avoiding and being polluted by copper-bath; And without waiting time polarization, directly test switch-off potential, improve testing efficiency.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (10)
1. a cloudy insurance system test piece test macro, is characterized in that, comprising:
For the detective pole that pipe under test cathode protecting parameter detects;
For obtaining the high resistance voltmeter of current potential;
For providing the reference electrode of reference potential when measuring the electropotential of pipe under test;
For the test piece as pipe under test leak source surrogate;
Wherein, described detective pole is all electrically connected with pipe under test, high resistance voltmeter and test piece, and the other end of described high resistance voltmeter also connects with reference electrode electrical;
Described test piece is identical with the material of described pipe under test, and described test piece is identical at the landfill depth of underground with described pipe under test.
2. cloudy insurance system test piece test macro according to claim 1, it is characterized in that, described reference electrode is standard hydrogen electrode, copper-copper sulfate reference electrode, silver-silver chloride reference electrode, calomel reference electrode, any one in zinc reference electrode, manganese dioxide reference electrode or Graphite Electrodes.
3. cloudy insurance system test piece test macro according to claim 1, it is characterized in that, the area of described test piece is 51-60cm
2.
4. cloudy insurance system test piece test macro according to claim 1, it is characterized in that, the landfill depth of described reference electrode in underground is 10-30cm.
5. cloudy insurance system test piece test macro according to claim 1, it is characterized in that, described test piece and described pipe under test are steel matter.
6. a cloudy insurance system test piece testing method, is characterized in that, said method comprising the steps of:
S1, the positive pole of high resistance voltmeter to be all electrically connected with detective pole and test piece, and the negative pole of high resistance voltmeter and reference electrode electrical are connect;
S2, when test piece and pipe under test are connected, obtain the energising current potential of test piece by high resistance voltmeter;
S3, when after the polarization time of specifying, then test piece and pipe under test to be disconnected, and obtain the switch-off potential of test piece by high resistance voltmeter;
S4, obtain the polarization value of pipe under test according to the difference of described switch-off potential and described energising current potential;
Wherein, described test piece is identical with the material of described pipe under test, and described test piece is identical at the landfill depth of underground with described pipe under test.
7. cloudy insurance system test piece testing method according to claim 6, it is characterized in that, described reference electrode is standard hydrogen electrode, copper-copper sulfate reference electrode, silver-silver chloride reference electrode, calomel reference electrode, any one in zinc reference electrode, manganese dioxide reference electrode or Graphite Electrodes.
8. cloudy insurance system test piece testing method according to claim 6, it is characterized in that, the area of described test piece is 51-60cm
2.
9. cloudy insurance system test piece testing method according to claim 6, it is characterized in that, the landfill depth of described reference electrode in underground is 10-30cm.
10. cloudy insurance system test piece testing method according to claim 6, it is characterized in that, described test piece and described pipe under test are steel matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510109481.4A CN104726871A (en) | 2015-03-11 | 2015-03-11 | Cathodic protection system test piece testing system and testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510109481.4A CN104726871A (en) | 2015-03-11 | 2015-03-11 | Cathodic protection system test piece testing system and testing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104726871A true CN104726871A (en) | 2015-06-24 |
Family
ID=53451272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510109481.4A Pending CN104726871A (en) | 2015-03-11 | 2015-03-11 | Cathodic protection system test piece testing system and testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104726871A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586596A (en) * | 2016-03-28 | 2016-05-18 | 沈阳龙昌管道检测中心 | Pipeline corrosion and protection experiment system |
| CN109540982A (en) * | 2018-12-06 | 2019-03-29 | 北京科技大学 | The test method of the true polarization curve of metal under a wide range of current potential and current condition |
| CN109682661A (en) * | 2019-01-22 | 2019-04-26 | 北京市燃气集团有限责任公司 | Gas pipeline stray current disturbed test coupon and its making and use method |
| CN109797399A (en) * | 2019-01-22 | 2019-05-24 | 北京市燃气集团有限责任公司 | The measuring device and method of steel gas pipe underground polarization potential |
| CN111220536A (en) * | 2018-11-23 | 2020-06-02 | 中国石油天然气股份有限公司 | Method, device and system for detecting corrosion probability of pipeline |
| CN111220857A (en) * | 2018-11-23 | 2020-06-02 | 中国石油天然气股份有限公司 | Potential detection method, device and system |
| CN111334804A (en) * | 2020-04-26 | 2020-06-26 | 中山大学 | Intelligent monitoring device for deep-sea oil and gas pipeline outer wall cathode protection and using method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11248086A (en) * | 1998-03-02 | 1999-09-14 | Osaka Gas Co Ltd | Anti-corrossion management system for draw-in piping to building and method for anti-corrosion management |
-
2015
- 2015-03-11 CN CN201510109481.4A patent/CN104726871A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11248086A (en) * | 1998-03-02 | 1999-09-14 | Osaka Gas Co Ltd | Anti-corrossion management system for draw-in piping to building and method for anti-corrosion management |
Non-Patent Citations (7)
| Title |
|---|
| "极化探头在埋地钢质管道阴极保护的应用";杨义军等;《煤气与热力》;20100430;第30卷(第4期);第25页左栏倒数第2段-右栏第1-2段、第25页倒数第2段、标题及图1 * |
| "用试片断电法测量埋地管道的断电电位和去极化过程";李自力等;《腐蚀与保护》;20120331;第33卷(第3期);第255-257页 * |
| 吴荫顺: "《电化学保护和缓蚀剂应用技术》", 31 March 2006, 化学工业出版社 * |
| 李自力等: ""用试片断电法测量埋地管道的断电电位和去极化过程"", 《腐蚀与保护》 * |
| 杨义军等: ""极化探头在埋地钢质管道阴极保护的应用"", 《煤气与热力》 * |
| 秦国治等: "《管道防腐蚀技术 第二版》", 31 January 2009, 化学工业出版社 * |
| 西部油田腐蚀与防护论文集编委会: "《西部油田腐蚀与防护论文集》", 28 February 2007, 吉林科学技术出版社 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586596A (en) * | 2016-03-28 | 2016-05-18 | 沈阳龙昌管道检测中心 | Pipeline corrosion and protection experiment system |
| CN111220536A (en) * | 2018-11-23 | 2020-06-02 | 中国石油天然气股份有限公司 | Method, device and system for detecting corrosion probability of pipeline |
| CN111220857A (en) * | 2018-11-23 | 2020-06-02 | 中国石油天然气股份有限公司 | Potential detection method, device and system |
| CN109540982A (en) * | 2018-12-06 | 2019-03-29 | 北京科技大学 | The test method of the true polarization curve of metal under a wide range of current potential and current condition |
| CN109540982B (en) * | 2018-12-06 | 2020-05-12 | 北京科技大学 | Method for testing metal true polarization curve under large-range potential and current conditions |
| CN109682661A (en) * | 2019-01-22 | 2019-04-26 | 北京市燃气集团有限责任公司 | Gas pipeline stray current disturbed test coupon and its making and use method |
| CN109797399A (en) * | 2019-01-22 | 2019-05-24 | 北京市燃气集团有限责任公司 | The measuring device and method of steel gas pipe underground polarization potential |
| CN111334804A (en) * | 2020-04-26 | 2020-06-26 | 中山大学 | Intelligent monitoring device for deep-sea oil and gas pipeline outer wall cathode protection and using method thereof |
| CN111334804B (en) * | 2020-04-26 | 2021-02-09 | 中山大学 | Intelligent monitoring device for deep-sea oil and gas pipeline outer wall cathode protection and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104726871A (en) | Cathodic protection system test piece testing system and testing method | |
| CA2915652C (en) | Apparatus and method for assessing subgrade corrosion | |
| CN107145685B (en) | Pipeline dynamic DC influence monitoring system and methods of risk assessment based on the Big Dipper | |
| CN104651853A (en) | Cathodic protection monitoring device and method | |
| CN102912356B (en) | Multifunctional catholic protection test probe and test method | |
| CN102353628B (en) | Polarization testing probe and testing method for cathodic protection of underground steel pipelines | |
| CN109797399A (en) | The measuring device and method of steel gas pipe underground polarization potential | |
| CN103411877A (en) | Buried steel pipeline coating stripping and corrosion test system under stress and stray current coupling effect | |
| CN104651854A (en) | Method and system for measuring switch-off potential of cathode protection system | |
| CN110609221A (en) | Automatic monitoring device for pipeline insulating joint and application method thereof | |
| CN103411830A (en) | Buried steel pipeline coating stripping and corrosion test method under stress and stray current coupling effect | |
| US6772622B2 (en) | Disbonded coating cathodic protection monitoring coupon | |
| Popov et al. | Cathodic protection of pipelines | |
| KR100717597B1 (en) | protection monitoring system | |
| CN203625477U (en) | Cathode protection monitoring device | |
| CN102146566A (en) | Cathode protection measurement constituent element for prestressed concrete cylinder pipeline | |
| Kowalski | The close interval potential survey (CIS/CIPS) method for detecting corrosion in underground pipelines | |
| Tan et al. | New electrochemical methods for visualizing dynamic corrosion and coating disbondment processes on simulated pipeline conditions | |
| JP2017129435A (en) | Buried-object soundness assessment method | |
| Nielsen | Considerations on measurements and measurement techniques under AC interference conditions | |
| Langelund | Potential Measurements, How to Effectively Monitor the'Health'of your Cathodic Protection System | |
| JP4522289B2 (en) | Corrosion estimation method | |
| CN111996534A (en) | Pipe network corrosion condition acquisition method | |
| CN204939618U (en) | A kind of device detecting sacrificial anode electrochemical performance in simulation well running casing outer wall corrosion environment | |
| Tan et al. | An overview of recent progresses in monitoring and understanding localized corrosion on buried steel pipelines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150624 |