CN101876624A - Metal corrosion rate measuring probe and method in atmospheric environment - Google Patents
Metal corrosion rate measuring probe and method in atmospheric environment Download PDFInfo
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- CN101876624A CN101876624A CN 201010209506 CN201010209506A CN101876624A CN 101876624 A CN101876624 A CN 101876624A CN 201010209506 CN201010209506 CN 201010209506 CN 201010209506 A CN201010209506 A CN 201010209506A CN 101876624 A CN101876624 A CN 101876624A
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- test piece
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- temperature compensation
- atmospheric environment
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- 238000005260 corrosion Methods 0.000 title claims abstract description 89
- 230000007797 corrosion Effects 0.000 title claims abstract description 89
- 239000002184 metal Substances 0.000 title claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 40
- 239000000523 sample Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 71
- 238000005086 pumping Methods 0.000 claims description 24
- 238000010276 construction Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000005284 excitation Effects 0.000 abstract 4
- 238000005259 measurement Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000005530 etching Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The invention relates to a detection device and a method, in particular to a metal corrosion rate measuring probe in atmospheric environment and an application method thereof. The measuring probe comprises an excitation signal input end (1), a test piece tray (2), a plurality of corrosion test pieces, a temperature compensation test piece (5), an excitation signal output end (6) and a plurality of response signal measuring ends. The method comprises the following steps: connecting a probe interface with a detection circuit, and applying the same DC excitation signal on the corrosion test pieces and the compensation test piece; acquiring the excitation response signals on both ends of each of the corrosion test pieces and compensation test piece; calculating the reduction quantity of each corrosion test piece; and calculating the metal corrosion rate according to the reduction quantity. The detection device has the advantages of small measuring error, high sensitivity, strong anti-jamming capability and wide applicability, and can realize remote on-line measurement.
Description
Technical field
The present invention relates to a kind of pick-up unit and method, metallic material corrosion rate measuring probe and using method thereof in particularly a kind of atmospheric environment.
Background technology
Metal constructions such as bridge often need to understand the situation of change of etch state in operational process, so that in time find the etching problem of metal construction, and then take necessary anticorrosive measure to solve its etching problem.Therefore, set up a cover real time on-line monitoring system, the corrosion rate of effectively measuring metal construction under the state of the normal operation of structures such as bridge seems quite necessary.Domestic present on-line monitoring technique all is the corrosion monitoring that is applied to pipeline inner walls such as petrochemical industry, and pipeline inner wall is uncoated naked metal, and environment of living in is liquid or liquid-solid hybird environment.
Metal detected at the corrosion condition under the atmospheric environment generally adopt hanging slice method at present, this pick-up unit is: use two insulators, the insulator centre position is provided with arc groove, metal testing plate to be measured is stuck in the arc groove of two insulators, the insulator that will be loaded with metal testing plate then hangs in the atmospheric environment, carries out the decay resistance test of metal testing plate.This detection method test period is long, can only obtain metal accumulation corrosion, can not reflect the corrosion condition that metal is instantaneous.
In view of the present present situation of monitoring rate of metal corrosion method in atmospheric environment, press for and a kind of probe that atmospheric environment can reflect the instantaneous corrosion rate of structural metallic materials that is applied to occurs.
Summary of the invention
The purpose of this invention is to provide metal corrosion rate measuring probe in a kind of atmospheric environment that can monitor the instantaneous corrosion rate of structural metallic materials in the atmospheric environment.
Another object of the present invention provides a kind of measuring method of using metal corrosion rate measuring probe in the described atmospheric environment.
In order to achieve the above object, the invention provides following technical scheme:
Metal corrosion rate measuring probe in a kind of atmospheric environment comprises: pumping signal input end 1, test piece pallet 2, a plurality of corrosion coupons, temperature compensation test piece 5, pumping signal output terminal 6 and a plurality of response signal measuring junction; Described a plurality of corrosion coupon and temperature compensation test piece 5 are connected in series successively and constitute the test piece group and be encapsulated on the test piece pallet 2; The two ends of above-mentioned test piece group connect described pumping signal input end 1 and pumping signal output terminal 6 respectively;
Described a plurality of response signal measuring junction is drawn from go into to hold and the go out end and a plurality of corrosion coupons 3,4 of series connection and the link between the temperature compensation test piece 5 of test piece group respectively; Wherein, described corrosion coupon, temperature compensation test piece 5 are identical with material composition, tissue, the coating process of metal construction to be monitored.
Each corrosion coupon of metal corrosion rate measuring probe plane contacts with atmospheric environment as workplace in the described atmospheric environment, and its lap is packaged in the described test piece pallet 2, and described temperature compensation test piece 5 is sealed in the described test piece pallet 2 fully.
Described corrosion coupon is first corrosion coupon 3 and second corrosion coupon 4, and these corrosion coupons and temperature compensation test piece 5 are rectangular thin slice shape.
Described a plurality of response signal measuring junction comprises the first response signal measuring junction 7, the second response signal measuring junction 8, the 3rd response signal measuring junction 9 and the 4th response signal measuring junction 10.
The connecting portion of described first corrosion coupon 3, second corrosion coupon 4, temperature compensation test piece 5 adopts the electric connection mode of copper sheet welding.
The measuring method of metal corrosion rate measuring probe in the described atmospheric environment may further comprise the steps:
(a) workplace with described probe is placed on the monitoring point;
(b) a plurality of response signal measuring junctions with described probe link to each other with testing circuit;
(c) a plurality of corrosion coupons and temperature compensation test piece 5 are connected in series successively and constitute the test piece group, apply same pumping signal to the test piece group from pumping signal input end 1;
(d) obtain the exciter response signal of a plurality of response signal measuring junctions respectively,, calculate the attenuate amount of each corrosion coupon, obtain corrosion of metal speed by described attenuate amount according to the exciter response signal and the input end pumping signal of each response signal measuring junction.
In the described step (d), above-mentioned pumping signal is a direct current electric current, and the exciter response signal is each corrosion coupon both end voltage.
Described a plurality of response signal measuring junction comprises the first response signal measuring junction 7, the second response signal measuring junction 8, the 3rd response signal measuring junction 9 and the 4th response signal measuring junction 10.
Connecting portion between described each corrosion coupon and the temperature compensation test piece 5 adopts the electric connection mode of copper sheet welding, makes connecting portion resistance much smaller than the resistance of each test piece own.
Compared with prior art, metal corrosion rate measuring probe can be monitored the instantaneous corrosion rate of the metal of metal construction in the atmospheric environment in the atmospheric environment that the present invention obtains, thereby in time find the etching problem of metal construction, so that take necessary anticorrosive measure to solve etching problem, thereby provide safeguard for the normal operation of metal construction.
Description of drawings
The synoptic diagram of metal corrosion rate measuring probe in the atmospheric environment that Fig. 1 obtains for the present invention.
Reference numeral
1 pumping signal input end, 2 test piece pallets
3 first corrosion coupons, 4 second corrosion coupons
5 temperature compensation test pieces, 6 pumping signal output terminals
7 first response signal measuring junctions, 8 second response signal measuring junctions
9 the 3rd response signal measuring junctions 10 the 4th response signal measuring junction
Embodiment
The invention will be further described with reference to the accompanying drawings below:
As shown in Figure 1, metal corrosion rate measuring probe in a kind of atmospheric environment, comprise: pumping signal input end 1, test piece pallet 2, the first corrosion coupons 3, second corrosion coupon 4, temperature compensation test piece 5, pumping signal output terminal 6, the first response signal measuring junction 7, the second response signal measuring junction 8, the 3rd response signal measuring junction 9, the 4th response signal measuring junction 10.First corrosion coupon 3, second corrosion coupon 4 are packaged on the test piece pallet 2 with temperature compensation test piece 5.First corrosion coupon 3, second corrosion coupon 4 are connected in series successively with temperature compensation test piece 5, and pumping signal input end 1 is positioned at first corrosion coupon, 3 left sides, and pumping signal output terminal 6 is positioned at temperature compensation test piece 5 right sides.Draw two leads from first corrosion coupon, 3 two ends as the first response signal measuring junction 7, the second response signal measuring junction 8, draw two leads from the two ends of temperature compensation test piece 5 as the 3rd response signal measuring junction 9, the 4th response signal measuring junction 10.The resistance at position is much smaller than the resistance of test piece own, so the response signal measuring junction at second corrosion coupon, 4 two ends is the second response signal measuring junction 8, the 3rd response signal measuring junction 9 because first corrosion coupon 3, second corrosion coupon 4 and temperature compensation test piece 5 are connected in series.The job operation that first corrosion coupon 3, second corrosion coupon 4, temperature compensation test piece 5 adopts should guarantee with structural metallic materials composition to be monitored, organize identically, and the coating process of employing is identical with metal construction to be monitored.
The course of work of metal corrosion rate measuring probe is as follows in the atmospheric environment that the present invention obtains: at first, select the representative monitoring point of metal construction in the atmospheric environment, probe is placed on the monitoring point, each signaling interface of probe is linked to each other with testing circuit, first corrosion coupon 3, second corrosion coupon 4, temperature compensation test piece 5 are applied same DC current pumping signal; Obtain the exciter response signal at first corrosion coupon 3, second corrosion coupon 4, temperature compensation test piece 5 two ends from the first response signal measuring junction 7～the 4th response signal measuring junction 10, pumping signal is a DC current, response signal is corrosion coupon and temperature compensation test piece 5 both end voltage, calculates test piece resistance in view of the above.Temperature compensation test piece 5 coats fully, does not corrode in environment, so resistance value only varies with temperature.And the resistance value of corrosion coupon then promptly varies with temperature with the sectional area minimizing variation that causes because of corrosion.Two resistances are compared the influence of the temperature factor that can disappear.The record variation of two resistance value ratios in time can draw the attenuate amount of corrosion coupon.The result of two corrosion coupons reference each other.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1. metal corrosion rate measuring probe in the atmospheric environment, it is characterized in that, it comprises: pumping signal input end (1), test piece pallet (2), a plurality of corrosion coupons, temperature compensation test piece (5), pumping signal output terminal (6) and a plurality of response signal measuring junction;
Described a plurality of corrosion coupon and temperature compensation test piece (5) are connected in series successively and constitute the test piece group and be encapsulated on the test piece pallet (2);
The two ends of above-mentioned test piece group connect described pumping signal input end (1) and pumping signal output terminal (6) respectively;
Described a plurality of response signal measuring junction is drawn from go into to hold and the go out end and a plurality of corrosion coupons (3,4) of series connection and the link between the temperature compensation test piece (5) of test piece group respectively;
Wherein, described corrosion coupon, temperature compensation test piece (5) are identical with material composition, tissue, the coating process of metal construction to be monitored.
2. metal corrosion rate measuring probe in the atmospheric environment as claimed in claim 1, it is characterized in that: a plane of each corrosion coupon contacts with atmospheric environment as workplace, its lap is packaged in the described test piece pallet (2), and described temperature compensation test piece (5) is sealed in the described test piece pallet (2) fully.
3. metal corrosion rate measuring probe in the atmospheric environment as claimed in claim 1 is characterized in that: described corrosion coupon is first corrosion coupon (3) and second corrosion coupon (4), and these corrosion coupons and temperature compensation test piece (5) are rectangular thin slice shape.
4. metal corrosion rate measuring probe in the atmospheric environment as claimed in claim 1 is characterized in that: described a plurality of response signal measuring junctions comprise the first response signal measuring junction (7), the second response signal measuring junction (8), the 3rd response signal measuring junction (9) and the 4th response signal measuring junction (10).
5. metal corrosion rate measuring probe in the atmospheric environment as claimed in claim 3 is characterized in that: the connecting portion of described first corrosion coupon (3), second corrosion coupon (4), temperature compensation test piece (5) adopts the electric connection mode of copper sheet welding.
6. the measuring method of metal corrosion rate measuring probe in the atmospheric environment as claimed in claim 1 is characterized in that: may further comprise the steps:
(a) workplace with described probe is placed on the monitoring point;
(b) a plurality of response signal measuring junctions with described probe link to each other with testing circuit;
(c) a plurality of corrosion coupons and temperature compensation test piece (5) are connected in series successively and constitute the test piece group, apply same pumping signal to the test piece group from pumping signal input end (1);
(d) obtain the exciter response signal of a plurality of response signal measuring junctions respectively,, calculate the attenuate amount of each corrosion coupon, obtain corrosion of metal speed by described attenuate amount according to the exciter response signal and the input end pumping signal of each response signal measuring junction.
7. measuring method as claimed in claim 6 is characterized in that: in the described step (d), above-mentioned pumping signal is a direct current electric current, and the exciter response signal is each corrosion coupon both end voltage.
8. measuring method as claimed in claim 6 is characterized in that: described a plurality of response signal measuring junctions comprise the first response signal measuring junction (7), the second response signal measuring junction (8), the 3rd response signal measuring junction (9) and the 4th response signal measuring junction (10).
9. measuring method as claimed in claim 6 is characterized in that: the connecting portion between described each corrosion coupon and the temperature compensation test piece (5) adopts the electric connection mode of copper sheet welding, makes connecting portion resistance much smaller than the resistance of each test piece own.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102095065A CN101876624B (en) | 2010-06-25 | 2010-06-25 | Metal corrosion rate measuring probe and method in atmospheric environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102095065A CN101876624B (en) | 2010-06-25 | 2010-06-25 | Metal corrosion rate measuring probe and method in atmospheric environment |
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| CN101876624A true CN101876624A (en) | 2010-11-03 |
| CN101876624B CN101876624B (en) | 2012-08-15 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645457A (en) * | 2012-05-04 | 2012-08-22 | 山东电力研究院 | Corrosion monitoring sensor for atmospheric environment pollutants |
| CN103207143A (en) * | 2012-01-13 | 2013-07-17 | 沈阳中科韦尔腐蚀控制技术有限公司 | Metal corrosion rate detection device with temperature detection double-test piece probe |
| CN103646884A (en) * | 2013-11-08 | 2014-03-19 | 上海华力微电子有限公司 | Method for detecting metal-wire corrosion by production environment |
| CN105758787A (en) * | 2016-04-26 | 2016-07-13 | 南方电网科学研究院有限责任公司 | Corrosion rate measuring device and method |
| CN104406901B (en) * | 2014-11-07 | 2017-02-01 | 北京奥科瑞检测技术开发有限公司 | Concrete internal steel bar corrosion monitoring sensor based on Lamb wave principle |
| CN107561001A (en) * | 2017-08-30 | 2018-01-09 | 哈尔滨工业大学深圳研究生院 | Resistance probe and the device for measuring metal etching extent in surrounding medium |
| CN109085211A (en) * | 2018-08-07 | 2018-12-25 | 亚翔系统集成科技（苏州）股份有限公司 | A kind of aggrieved area's detection method in toilet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7387031B1 (en) * | 2006-12-22 | 2008-06-17 | Tetra Technologies, Inc. | Method for monitoring corrosion damage to a metal sample |
| CN101246114A (en) * | 2007-02-14 | 2008-08-20 | 沈阳中科腐蚀控制工程技术有限公司 | Metal corrosion rate measuring instrument adopting alternating current resistance probe and measuring method thereof |
| CN101315324A (en) * | 2008-07-01 | 2008-12-03 | 宁波海科结构腐蚀控制工程技术有限公司 | Corrosion on-line monitoring system for reinforced bar in concrete |
| CN201697860U (en) * | 2010-06-25 | 2011-01-05 | 钢铁研究总院青岛海洋腐蚀研究所 | Probe used for measuring corrosion rate of metal material in atmospheric environment |
-
2010
- 2010-06-25 CN CN2010102095065A patent/CN101876624B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7387031B1 (en) * | 2006-12-22 | 2008-06-17 | Tetra Technologies, Inc. | Method for monitoring corrosion damage to a metal sample |
| CN101246114A (en) * | 2007-02-14 | 2008-08-20 | 沈阳中科腐蚀控制工程技术有限公司 | Metal corrosion rate measuring instrument adopting alternating current resistance probe and measuring method thereof |
| CN101315324A (en) * | 2008-07-01 | 2008-12-03 | 宁波海科结构腐蚀控制工程技术有限公司 | Corrosion on-line monitoring system for reinforced bar in concrete |
| CN201697860U (en) * | 2010-06-25 | 2011-01-05 | 钢铁研究总院青岛海洋腐蚀研究所 | Probe used for measuring corrosion rate of metal material in atmospheric environment |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207143A (en) * | 2012-01-13 | 2013-07-17 | 沈阳中科韦尔腐蚀控制技术有限公司 | Metal corrosion rate detection device with temperature detection double-test piece probe |
| CN103207143B (en) * | 2012-01-13 | 2015-06-17 | 沈阳中科韦尔腐蚀控制技术有限公司 | Metal corrosion rate detection device with temperature detection double-test piece probe |
| CN102645457A (en) * | 2012-05-04 | 2012-08-22 | 山东电力研究院 | Corrosion monitoring sensor for atmospheric environment pollutants |
| CN103646884A (en) * | 2013-11-08 | 2014-03-19 | 上海华力微电子有限公司 | Method for detecting metal-wire corrosion by production environment |
| CN103646884B (en) * | 2013-11-08 | 2016-04-27 | 上海华力微电子有限公司 | Detect the method that production environment is corroded metal connecting line |
| CN104406901B (en) * | 2014-11-07 | 2017-02-01 | 北京奥科瑞检测技术开发有限公司 | Concrete internal steel bar corrosion monitoring sensor based on Lamb wave principle |
| CN105758787A (en) * | 2016-04-26 | 2016-07-13 | 南方电网科学研究院有限责任公司 | Corrosion rate measuring device and method |
| CN107561001A (en) * | 2017-08-30 | 2018-01-09 | 哈尔滨工业大学深圳研究生院 | Resistance probe and the device for measuring metal etching extent in surrounding medium |
| CN109085211A (en) * | 2018-08-07 | 2018-12-25 | 亚翔系统集成科技（苏州）股份有限公司 | A kind of aggrieved area's detection method in toilet |
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| Publication number | Publication date |
|---|---|
| CN101876624B (en) | 2012-08-15 |
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Granted publication date: 20120815 |