CN104120430B - Inner potential Two dimensional Distribution measurement apparatus in gap under a kind of release coating - Google Patents
Inner potential Two dimensional Distribution measurement apparatus in gap under a kind of release coating Download PDFInfo
- Publication number
- CN104120430B CN104120430B CN201310152359.6A CN201310152359A CN104120430B CN 104120430 B CN104120430 B CN 104120430B CN 201310152359 A CN201310152359 A CN 201310152359A CN 104120430 B CN104120430 B CN 104120430B
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- Prior art keywords
- bottom plate
- salt bridge
- cover plate
- gap
- area
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- 239000011248 coating agent Substances 0.000 title claims abstract description 18
- 238000000576 coating method Methods 0.000 title claims abstract description 18
- 238000005259 measurement Methods 0.000 title claims abstract description 12
- 238000005538 encapsulation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000002848 electrochemical method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 238000004210 cathodic protection Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229910000960 colored gold Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The present invention relates to metal erosion measuring apparatus field, is specifically cathodic protection potential Two dimensional Distribution multichannel potential measuring instrument under a kind of release coating.Including bottom plate, the cover plate for being placed on bottom plate and being fixed with bottom plate, there is gap between its cover plate and bottom plate, the cover plate side is that uniform intervals set the position of correspondence array salt bridge on array salt bridge, the bottom plate to set Integral rectangular sample rest area on solution area, opposite side.The present invention can carry out Two dimensional Distribution measurement to metallic cathode protection potential in gap, and be monitored in real time.Present device has small volume, simple in construction, easy to operate, the advantages of accuracy of detection is high.
Description
Technical field
It is specifically cathodic protection potential two dimension under a kind of release coating the present invention relates to metal erosion measurement apparatus
It is distributed multichannel potential test device.
Background technology
Usual buried pipeline anticorrosion coating is not perfect to the buffer action of corrosive medium.Due to coating material in itself
Defect（Pin hole, leak source etc.）And in pipeline transportation, handling and work progress, mechanical damage, pipeline can be all caused to coating
Buried rear surrounding soil environment effect（Such as：The factors such as soil stress, cathode hydrogen evolution）, damage from third-party etc. can all cause to apply break
Sunken formation and extension.The above results can all cause corrosion-inhibiting coating to lose cohesive force and peeling-off, in pipe surface and coating
Between form gap, once the Korrosionsmedium in environment（Such as underground water, oxygen, carbon dioxide, sulfate ion, chlorion
And microorganism etc.）Penetrate into gap, local corrosion microenvironment will be formed, can result in gap interior conduit under release coating and occur
Corrosion.
In the prior art usually through measuring instruments such as universal meters to metallic cathode protection potential one in gap under release coating
Dimension distribution is measured, but it is a two-dimensional space that fine gap, which can be generally approximately considered, it is therefore desirable to carry out electricity to it
The Two dimensional Distribution measurement of position.
The content of the invention
In place of the present invention is for above shortcomings in the prior art, the technical problem to be solved is to provide a kind of mould
Intend the measurement apparatus of metallic cathode protection potential Two dimensional Distribution in gap under release coating, using under the device measuring release coating
The situation that gap interior conduit corrodes, can in real time be monitored to two-dimensional space inner potential change under release coating.
In order to realize the above mentioned problem of the present invention, the present invention is adopted the following technical scheme that,
Metal current potential Two dimensional Distribution measurement apparatus in gap under a kind of release coating, including bottom plate, be placed on bottom plate and with
The cover plate that bottom plate is fixed, with gap between its cover plate and bottom plate, between the cover plate side is uniform on solution area, opposite side
Every setting the position of correspondence array salt bridge on array salt bridge, the bottom plate, Integral rectangular sample rest area is set.
A solution area auxiliary electrode being connected with additional power source is provided with the solution area and one is connected outer power-up
The solution area salt bridge in source.
The two ends of cover plate and bottom plate are fixed together by rivet sealing, and the pad with thickness is set between cover plate and bottom plate
Piece, by pad formation slit region between cover plate and bottom plate, solution area is communicated with slit region.
The number of the array salt bridge sets N number of according to experiment specific requirement, to measure under release coating in gap
Current potential Two dimensional Distribution changes.
The number N of array salt bridge is 64.
The array salt bridge is arranged as 8 × 8 or 4 × 16.
The present invention has the advantage that and beneficial effect：
1st, the present invention can carry out Two dimensional Distribution measurement to metallic cathode protection potential in gap, and be monitored in real time.
2nd, present device has small volume, simple in construction, easy to operate, the advantages of accuracy of detection is high.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is Fig. 1 top view；
Fig. 3 is the structural representation of bottom plate in the present invention；
In figure, 1, cover plate；2nd, bottom plate；3rd, pad；4th, rivet；5th, array salt bridge；6th, solution area auxiliary electrode；7th, it is molten
Liquid zone salt bridge；8th, slit region；9th, solution area；10th, sample rest area.
Embodiment
Structure of the present invention is described in detail below in conjunction with the accompanying drawings.
Embodiment
As shown in Fig. 1 ~ 3, inner potential Two dimensional Distribution measurement apparatus in gap under release coating of the present invention, including bottom plate 2, be placed in
The cover plate 1 fixed on bottom plate 2 and with bottom plate 2, has slit region 8, cover plate 1 and the two of bottom plate 2 between its cover plate 1 and bottom plate 2
End is fixed together by the sealing of rivet 4, sets the pad 3 with thickness to gap between cover plate 1 and bottom plate 2.This reality
Apply in example, pad 3 uses PTFE material.
As shown in Fig. 1,2 and 3, the side of cover plate 1 is solution area 9, and solution area 9 is communicated with slit region 8（See Fig. 3）, opposite side
The array salt bridge 5 that upper uniform intervals are provided with（See Fig. 1 and Fig. 2）, the position of corresponding salt bridge is provided between cover plate and bottom plate
Integral rectangular sample rest area 10, the test button for placing monoblock.Array salt bridge is 4 × 16 arrangements in the present embodiment.
A solution area auxiliary electrode 6 and the solution for being connected additional power source being connected with additional power source is provided with solution area 9
Area's salt bridge 7 (see Fig. 1 and Fig. 2).
The use process of the present invention is as follows：
Sample is mainly encapsulated by sample rest area 10 on a base plate 2 using electrochemical measurement, sample is put on cover plate 1
Area's correspondence position encapsulation auxiliary electrode and salt bridge are put, salt bridge outer contacting is connected with reference electrode, so that two electrode systems are formed,
It is final that two-dimensional measurement is carried out to metallic cathode protection potential in gap.
Sample can also have coloured gold generally from carbon steel, pipe line steel X65, X70, X80, X100 etc. with other in the present invention
Category is tested.
Claims (1)
1. inner potential Two dimensional Distribution measurement apparatus in gap under a kind of release coating, it is characterised in that the device includes bottom plate, is placed in
The cover plate fixed on bottom plate and with bottom plate, with slit region between its cover plate and bottom plate, the two ends of cover plate and bottom plate pass through riveting
Nail sealing is fixed together, and sets the pad with thickness to gap between cover plate and bottom plate, pad uses PTFE material；
Cover plate side is solution area, and solution area is communicated with slit region, the array salt bridge that uniform intervals are provided with opposite side, lid
The position of corresponding salt bridge is provided with Integral rectangular sample rest area between plate and bottom plate, the test button for placing monoblock；Battle array
Column salt bridge is to be provided with the solution being connected with additional power source area's auxiliary electrode and a company in 4 × 16 arrangements, solution area
Connect the solution area salt bridge of additional power source；
The use process of the device is as follows：Using electrochemical measurement mainly by the sample rest area encapsulation sample on bottom plate,
Sample rest area correspondence position encapsulation auxiliary electrode and salt bridge, salt bridge outer contacting is connected with reference electrode on the cover board, so that
Two electrode systems are formed, two-dimensional measurement finally is carried out to metallic cathode protection potential in gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310152359.6A CN104120430B (en) | 2013-04-27 | 2013-04-27 | Inner potential Two dimensional Distribution measurement apparatus in gap under a kind of release coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310152359.6A CN104120430B (en) | 2013-04-27 | 2013-04-27 | Inner potential Two dimensional Distribution measurement apparatus in gap under a kind of release coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104120430A CN104120430A (en) | 2014-10-29 |
| CN104120430B true CN104120430B (en) | 2017-08-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310152359.6A Expired - Fee Related CN104120430B (en) | 2013-04-27 | 2013-04-27 | Inner potential Two dimensional Distribution measurement apparatus in gap under a kind of release coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104120430B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398151A (en) * | 2019-01-02 | 2020-07-10 | 中国石油化工股份有限公司 | Interference corrosion test device for pipeline by alternating stray current |
| CN113533468B (en) * | 2021-07-02 | 2023-08-18 | 广东省科学院工业分析检测中心 | Preparation method of fence type array electrode |
| CN113983361B (en) * | 2021-09-15 | 2023-02-03 | 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504365A (en) * | 1982-11-01 | 1985-03-12 | The Kendall Company | Non-destructive cathodic disbondment testing of pipewrap coatings |
| CN1035735C (en) * | 1995-07-04 | 1997-08-27 | 厦门大学 | Metal/polymer composite material interface electric potential distribution measuring device |
| US6772622B2 (en) * | 2001-03-09 | 2004-08-10 | Southwest Research Institute | Disbonded coating cathodic protection monitoring coupon |
| CN202744629U (en) * | 2012-08-23 | 2013-02-20 | 中国科学院金属研究所 | Corrosion testing device for metal inside gaps under stripped coatings |
| CN203229575U (en) * | 2013-04-27 | 2013-10-09 | 中国科学院金属研究所 | Device for measuring two-dimensional potential distribution in gap under release coating |
-
2013
- 2013-04-27 CN CN201310152359.6A patent/CN104120430B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| The effects of sulfate reducing bacteria on corrosion of carbon steel Q235 under simulated disbonded coating by using electrochemical impedance spectroscopy;Jin Xu etal;《Corrosion Science》;20111231;第53卷;第1554–1562页 * |
| 合成绝缘子端部金具的缝隙腐蚀研究;张大全等;《中国电机工程学报》;20060228;第26卷(第3期);第86-90页 * |
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| Publication number | Publication date |
|---|---|
| CN104120430A (en) | 2014-10-29 |
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Granted publication date: 20170811 Termination date: 20180427 |