CN105021519A - On-line atmospheric corrosion measuring device - Google Patents
On-line atmospheric corrosion measuring device Download PDFInfo
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- CN105021519A CN105021519A CN201510496157.2A CN201510496157A CN105021519A CN 105021519 A CN105021519 A CN 105021519A CN 201510496157 A CN201510496157 A CN 201510496157A CN 105021519 A CN105021519 A CN 105021519A
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Abstract
The invention relates to an on-line atmospheric corrosion measuring device which mainly solves the problems that in the prior art, the measurement accuracy is low and operation is complex. The on-line atmospheric corrosion measuring device comprises epoxy resin daub, at least one electrode set and lead wires; each electrode set is composed of a work electrode with the lead wire, a counter electrode and a reference electrode, and all the electrode sets are entirely packed in the epoxy resin daub; the section of each counter electrode is in the shape of a circular ring, the work electrodes penetrate through the center of the circular rings and are insulated, and the section of each work electrode is in the shape of a circle, wherein a hole is formed in the center of the circle; the reference electrodes penetrate through the holes and are insulated. According to the technical scheme, the problems are well solved, and the device can be applied in on-line atmospheric corrosion measuring.
Description
Technical field
The present invention relates to a kind of atmospheric corrosion on-line measurement device.
Background technology
To metallic material corrosion monitoring, countries in the world are all attached great importance to.As marine corrosion environment measurement is just actively carried out in the 1980s in U.K. North Sea oil field, evaluate its corrosive power.Therefore corrosion monitoring obtains general application in countries in the world.Research shows, in physical environment, the corrosion failure of more than 50% is caused by atmospheric corrosion.In the U.S., atmospheric corrosion can cause the huge economic loss of annual more than 1,380 hundred million dollars, as can be seen here the destruction seriousness of atmospheric corrosion.
The advanced online atmospheric corrosion monitoring technology of research is most important, could realize like this to corrosion material long-term, rapidly, continuously, field monitoring really.In atmospheric corrosion monitoring, some classic methods are usually used in assessing atmospheric corrosion, as Raman spectrum, and scanning electron microscope, x-ray photoelectron power spectrum and atomic force microscope and surrosion/weightlessness etc.CN03112388.0 relates to a kind of method measuring metal corrosion potential at atmospheric environment, make metal electrode to be measured and inert metal vibration probe composition capacitance-type vibration, measure the electrode potential value that exchange current that this capacitance-type vibration produces applies when reaching amplitude minimum point and phase jump point, then demarcate metal atmospheric corrosion current potential according to the latter.
But these classic methods can not provide continuously in-situ corrosion information timely; Atmospheric corrosion of metal materials essence is the galvanic corrosion occurred under electrolyte membrane, due to thickness and the successional problem of thin liquid film, galvanochemistry on-line measurement is had difficulties.Atmospheric corrosion electrochemical detection method relatively more conventional is at present Kelvin probe (Kelvin) and atmospheric corrosion monitoring (ACM), but their contrast electrodes useless or external contrast electrode, play certain interference effect to Real Atmosphere corrosion monitoring like this, operating process is simultaneously also comparatively loaded down with trivial details.Atmospheric corrosion electrochemical detection method relatively more conventional is at present Kelvin probe (Kelvin) and atmospheric corrosion monitoring (ACM), but their contrast electrodes useless or external contrast electrode, play certain interference effect to Real Atmosphere corrosion monitoring like this, operating process is simultaneously also comparatively loaded down with trivial details.
The present invention solves this problem targetedly.
Summary of the invention
Technical matters to be solved by this invention is the problem of not high, the complicated operation of accuracy of measurement in prior art, provides a kind of new atmospheric corrosion on-line measurement device.This device is used for, in atmospheric corrosion on-line measurement, having the advantage that accuracy of measurement is high, simple to operate.
For solving the problem, the technical solution used in the present invention is as follows: a kind of atmospheric corrosion on-line measurement device, comprise epoxy mortar, at least one electrode group and lead-in wire, described each electrode group is by the working electrode with lead-in wire, form electrode and contrast electrode, and all electrode group overall package, in epoxy mortar, are toroidal to electrode sections, working electrode passes circle ring center and insulate, working electrode cross section is circular, and circular central has a hole, and contrast electrode passes this hole and insulate.
In technique scheme, preferably, the described annulus area to electrode sections is at least twice of working electrode area of section.
In technique scheme, preferably, described working electrode selects shape size consistent and the metal material that composition is identical.
In technique scheme, preferably, described is that inert metal material or graphite make to electrode, and inert metal is selected from stainless steel, platinum, iridium, palladium, titanium or its alloy.
In technique scheme, preferably, described contrast electrode directly adopts the filamentary silver that plated silver chloride or indirect agar to be connected to other contrast electrode as salt bridge.
In technique scheme, preferably, in the aperture of the circular central in working electrode cross section, insert kapillary, the diameter of kapillary is greater than the diameter of contrast electrode.
In technique scheme, preferably, under measurement mechanism is placed on the required atmospheric environment measured, connection signal harvester, realizes on-line measurement.
The atmospheric corrosion on-line measurement device that this patent provides, adopt three-electrode system, the interference of ohmmic drop to automatic polarizing system can be reduced, and can the comparatively metal instantaneous corrosion rate of metal construction in monitor atmospheric environment, thus the etching problem of Timeliness coverage metal construction, to take necessary anticorrosive measure to solve etching problem, thus provide safeguard for the normal operation of the metal construction in atmospheric environment.The impact of high impedance electrolytic solution can not only be reduced, and impedance, the potential change process of material in true environment can be monitored more accurately, and manufacturing process simple and convenient, economical and practical, operate simple and easy, achieve good technique effect.
Accompanying drawing explanation
Fig. 1 is atmospheric corrosion on-line measurement device front elevation.
Fig. 2 is atmospheric corrosion on-line measurement device vertical view.
Fig. 3 is independent unit enlarged diagram in Fig. 2.
In Fig. 1 ~ Fig. 3,1-epoxy mortar, 2-are to electrode, 3-working electrode, 4-contrast electrode, 5-wire.
Fig. 4 is that the corrosion speed surveyed with this device over time in embodiment 1 under different relative humidities and in the 168h time.
Fig. 5 is in embodiment 1 under different relative humidities and in the 168h time, and the corrosion speed surveyed by corrosion weight loss method over time
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
Embodiment
[embodiment 1]
A kind of atmospheric corrosion on-line measurement device, as shown in FIG. 1 to 3, comprise epoxy mortar, four electrode groups and lead-in wire, described each electrode group is by the working electrode with lead-in wire, form electrode and contrast electrode, and all electrode group overall package, in epoxy mortar, are toroidal to electrode sections, working electrode passes circle ring center and insulate, working electrode cross section is circular, and circular central has a hole, and contrast electrode passes this hole and insulate.
Working electrode, to electrode and contrast electrode first with acetone cleaning, then clean surface with distilled water, dry up after absolute ethyl alcohol wiping.
In the medial small hole of working electrode, insert kapillary, the diameter of glass tube should be greater than the diameter of contrast electrode, and contrast electrode directly can be connected to outer contrast electrode with the filamentary silver plating silver chloride or indirect agar as salt bridge.
Working electrode diameter should be greater than to electrode internal diameter, working electrode area more than two times or two times should be greater than to electrode area.Be that inert metal material or graphite make to electrode, inert metal is selected from stainless steel, platinum, iridium, palladium, titanium or its alloy.
Arrange between each unit of whole system and control its position by mould, whole system epoxy mortar (it is 1: 1 that epoxy resin and Versamid prepare mass ratio) encapsulates whole electrode system, solidifies 24 hours.Workplace is polished to 1000# a little with waterproof abrasive paper again.Distilled water cleans, and cotton ball soaked in alcohol oil removing, cold wind dries up, and is placed in exsiccator for subsequent use after 24h.
The present invention effectively can detect the real-time galvanic corrosion behavior of metal material in the atmospheric environment of simulation, and is easy to operation.Be below the method for testing of this device under simulated marine atmosphere environment, wherein working electrode is pure zinc, is 304 stainless steels to electrode, and contrast electrode is that saturated salt bridging is connected to silver silver chloride electrode.
In order to simulated marine atmosphere environment, with saturated salt solution control required for relative humidity within the scope of 70 ~ 100%RH as study condition.200 μ g cm
-2naCl salt grain amount uniform settling is on the surface of this device.Sedimentation 200 μ gcm
-2the device of NaCl salt grain amount is placed in constant temperature 25 DEG C and different relative humidity case, and this device is connected on impedance instrument, carries out on-line data acquisition.Though the corrosion speed surveyed changes as shown in Figure 4 in time.In order to the accuracy of the sea atmosphere corrosion velocity variations that demo plant is surveyed, we verify the corrosion speed that device is surveyed by corrosion weight loss method.The corrosion speed that corrosion weight loss method is surveyed as shown in Figure 5, from Fig. 5 can the corrosion speed variation tendency that draws of proof diagram 4 correct.Therefore, this device may be used in atmospheric corrosion velocity survey.
Exemplary description has been done to above invention; when not departing from core of the present utility model, any simple distortion, amendment or other those skilled in the art can not spend the equivalent replacement of creative work all to fall into protection scope of the present invention.
Claims (7)
1. an atmospheric corrosion on-line measurement device, comprise epoxy mortar, at least one electrode group and lead-in wire, described each electrode group is by the working electrode with lead-in wire, form electrode and contrast electrode, all electrode group overall package are in epoxy mortar, be toroidal to electrode sections, working electrode is through circle ring center and insulate, and working electrode cross section be circle, circular central has a hole, and contrast electrode passes this hole and insulate.
2. atmospheric corrosion on-line measurement device according to claim 1, is characterized in that the described annulus area to electrode sections is at least twice of working electrode area of section.
3. atmospheric corrosion on-line measurement device according to claim 1, is characterized in that described working electrode selects shape size consistent and the metal material that composition is identical.
4. atmospheric corrosion on-line measurement device according to claim 1, it is characterized in that described is that inert metal material or graphite make to electrode, inert metal is selected from stainless steel, platinum, iridium, palladium, titanium or its alloy.
5. atmospheric corrosion on-line measurement device according to claim 1, is characterized in that described contrast electrode directly adopts the filamentary silver that plated silver chloride or indirect agar to be connected to other contrast electrode as salt bridge.
6. atmospheric corrosion on-line measurement device according to claim 1, it is characterized in that inserting kapillary in the aperture of the circular central in working electrode cross section, the diameter of kapillary is greater than the diameter of contrast electrode.
7. atmospheric corrosion on-line measurement device according to claim 1, under it is characterized in that measurement mechanism is placed on the required atmospheric environment measured, connection signal harvester, realizes on-line measurement.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424590A (en) * | 2015-12-07 | 2016-03-23 | 天津大学 | Sensor and detection method for atmosphere corrosion detection of steel member or test piece |
| CN106198645A (en) * | 2016-06-24 | 2016-12-07 | 中国船舶重工集团公司第七二五研究所 | A kind of atmospheric environment wetting time detection device |
| CN106596387A (en) * | 2016-12-07 | 2017-04-26 | 中国特种飞行器研究所 | Corrosion rate on-line monitoring sensing probe of airplane metal matrix structure |
| CN108226027A (en) * | 2017-12-13 | 2018-06-29 | 中国特种飞行器研究所 | Coating aging failure evaluation method under a kind of air thin liquid film environment |
| CN108827868A (en) * | 2018-06-26 | 2018-11-16 | 武汉科思特仪器股份有限公司 | A kind of coating failure monitoring probe and live coating failure quick monitoring method |
| CN109283129A (en) * | 2017-07-21 | 2019-01-29 | 宝山钢铁股份有限公司 | Electrode and its monitoring method for carbon steel cold-rolled steel sheet atmospheric environment corrosion monitoring |
| CN109612920A (en) * | 2018-12-13 | 2019-04-12 | 国网山东省电力公司电力科学研究院 | A kind of metal component atmospheric corrosion monitoring method |
| CN110470519A (en) * | 2019-09-06 | 2019-11-19 | 四川轻化工大学 | Detect sample of porous metals corrosion behavior and preparation method thereof and detection method |
| CN110879237A (en) * | 2019-12-05 | 2020-03-13 | 中国特种飞行器研究所 | Airplane environment severity on-line monitoring sensing probe |
| CN111024790A (en) * | 2020-01-10 | 2020-04-17 | 中国海洋大学 | Composite tow electrode and preparation method thereof |
| CN111579475A (en) * | 2020-05-29 | 2020-08-25 | 北京国网弘泰科技有限公司 | Couple method atmospheric corrosion sensor and manufacturing method thereof |
| CN111735753A (en) * | 2020-05-13 | 2020-10-02 | 河海大学 | Equipment for online detection of corrosion state of steel structure in atmosphere and use method of equipment |
| CN112461745A (en) * | 2020-11-05 | 2021-03-09 | 中国科学院海洋研究所 | Electrochemical probe and measuring method for on-site monitoring corrosion of weathering steel rust layer |
| CN113049485A (en) * | 2021-02-08 | 2021-06-29 | 中国船舶重工集团公司第七二五研究所 | Metal material marine atmospheric corrosion in-situ monitoring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105424590B (en) * | 2015-12-07 | 2018-01-19 | 天津大学 | The sensor and detection method detected for steel component or test piece atmospheric corrosion |
| CN105424590A (en) * | 2015-12-07 | 2016-03-23 | 天津大学 | Sensor and detection method for atmosphere corrosion detection of steel member or test piece |
| CN106198645A (en) * | 2016-06-24 | 2016-12-07 | 中国船舶重工集团公司第七二五研究所 | A kind of atmospheric environment wetting time detection device |
| CN106596387A (en) * | 2016-12-07 | 2017-04-26 | 中国特种飞行器研究所 | Corrosion rate on-line monitoring sensing probe of airplane metal matrix structure |
| CN109283129A (en) * | 2017-07-21 | 2019-01-29 | 宝山钢铁股份有限公司 | Electrode and its monitoring method for carbon steel cold-rolled steel sheet atmospheric environment corrosion monitoring |
| CN108226027A (en) * | 2017-12-13 | 2018-06-29 | 中国特种飞行器研究所 | Coating aging failure evaluation method under a kind of air thin liquid film environment |
| CN108827868A (en) * | 2018-06-26 | 2018-11-16 | 武汉科思特仪器股份有限公司 | A kind of coating failure monitoring probe and live coating failure quick monitoring method |
| CN109612920B (en) * | 2018-12-13 | 2021-07-09 | 国网山东省电力公司电力科学研究院 | Atmospheric corrosion monitoring method for metal component |
| CN109612920A (en) * | 2018-12-13 | 2019-04-12 | 国网山东省电力公司电力科学研究院 | A kind of metal component atmospheric corrosion monitoring method |
| CN110470519A (en) * | 2019-09-06 | 2019-11-19 | 四川轻化工大学 | Detect sample of porous metals corrosion behavior and preparation method thereof and detection method |
| CN110879237A (en) * | 2019-12-05 | 2020-03-13 | 中国特种飞行器研究所 | Airplane environment severity on-line monitoring sensing probe |
| CN111024790A (en) * | 2020-01-10 | 2020-04-17 | 中国海洋大学 | Composite tow electrode and preparation method thereof |
| CN111735753A (en) * | 2020-05-13 | 2020-10-02 | 河海大学 | Equipment for online detection of corrosion state of steel structure in atmosphere and use method of equipment |
| CN111735753B (en) * | 2020-05-13 | 2022-04-08 | 河海大学 | Equipment for online detection of corrosion state of steel structure in atmosphere and use method of equipment |
| CN111579475A (en) * | 2020-05-29 | 2020-08-25 | 北京国网弘泰科技有限公司 | Couple method atmospheric corrosion sensor and manufacturing method thereof |
| CN112461745A (en) * | 2020-11-05 | 2021-03-09 | 中国科学院海洋研究所 | Electrochemical probe and measuring method for on-site monitoring corrosion of weathering steel rust layer |
| CN112461745B (en) * | 2020-11-05 | 2022-09-27 | 中国科学院海洋研究所 | Electrochemical probe and measuring method for on-site monitoring corrosion of weathering steel rust layer |
| CN113049485A (en) * | 2021-02-08 | 2021-06-29 | 中国船舶重工集团公司第七二五研究所 | Metal material marine atmospheric corrosion in-situ monitoring device |
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