CN104048914A - Device for monitoring corrosion of metal in different cement accidents - Google Patents
Device for monitoring corrosion of metal in different cement accidents Download PDFInfo
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- CN104048914A CN104048914A CN201410294147.6A CN201410294147A CN104048914A CN 104048914 A CN104048914 A CN 104048914A CN 201410294147 A CN201410294147 A CN 201410294147A CN 104048914 A CN104048914 A CN 104048914A
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Abstract
The invention discloses a device for monitoring corrosion of metal in different cement accidents. The device comprises a multi-channel electrode, a reference electrode, an auxiliary electrode, a first electronic multi-way switch, a variable resistor, a zero-resistance amperemeter, a sampling resistor, an electric potential follower, an A/D (Analog /Digital) converter, an MCU (Microprogrammed Control Unit) controller, a second electronic multi-way switch, an electrochemical workstation and a computer; the device can measure the corrosion current and the corrosion potential of the electrode in different cement accident regions, can judge an anode region and a cathode region as well as the corrosion change condition, also can perform electrochemical testing to the specific electrode, such as electrochemical impedance and linear polarization, can conveniently study the corrosion process and the corrosion mechanism, and provides an effective study method.
Description
Technical field.
The present invention relates to corrosion field, relate in particular to a kind of device that metal corrodes in different cement accidents of monitoring.
Background technology
Cement is a kind of high alkalinity environment (pH value is in 13 left and right), and metal forms passive state film at this environment lower surface, so its corrosion rate is very slow.But when because artificial or natural cause, cause cement to occur crackle, interlayer, while the accident such as coming off, corrosion of metal speed can obviously be accelerated.In monitoring cement, the method for corrosion of metal can be divided into two classes at present, i.e. electrochemical method and physical method.
Electrochemical method mainly comprises: half-cell prtential measurement, polarization measurement, electrochemical noise, electrochemical impedance spectroscopy, local electrochemical impedance spectroscopy, continuous current pulse and scanning contrast electrode.Physical method mainly comprises visualization, vibratory drilling method, infra-red heat spectrometry, acoustic-emission, radiograph method, reflection of radar wave method, resistivity measurement, resistance probe method, embedded fiber conduction method, the method based on microwave and heat reflection method.
But monitor at present the corrosion of metal in different conditions cement, be confined to study respectively unitary electrode and be in the corrosion condition in a certain particular state cement, can not determine the position that local corrosion occurs, can not study the corrosion information such as the real-time current potential of diverse location and electric current occur, these research meanses can not characterize the Dynamic Corrosion information under actual conditions, do not consider the actual conditions that metal had not only been covered by intact cement but also had the cement of accident to cover simultaneously, based on above problem, the present invention proposes a kind of device that metal corrodes in different cement accidents of monitoring.
Summary of the invention
The invention provides a kind of device that metal corrodes in different cement accidents of monitoring, the present invention carries out Real-Time Monitoring to the corrosion current of multi-channel electrode and corrosion potential, and to specifying electrode to carry out electrochemical measurement, can study corrosion of metal process and the corrosion mechanism in different cement emergency areas simultaneously, described below:
A kind ofly monitor the device that metal corrodes in different cement accidents, described device comprises: multi-channel electrode, contrast electrode, auxiliary electrode, the first electronic multi-channel switch, variable resistor, zero resistance galvanometer, sample resistance, current potential follower, A/D converter, MCU controller, the second electronic multi-channel switch, electrochemical workstation, computing machine
Described multi-channel electrode is connected with described variable-resistance one end with the galvanometric input end of described zero resistance respectively through described the first electronic multi-channel switch, galvanometric another input end grounding of described zero resistance, and described zero resistance galvanometer and described variable resistor are connected in parallel; The galvanometric output terminal of described zero resistance is connected with the input end of described A/D converter;
Described multi-channel electrode is also connected with described current potential follower through described the first electronic multi-channel switch simultaneously, described current potential follower is in parallel with described sample resistance, another input end of described current potential follower is connected with described contrast electrode, described current potential follower output terminal is connected with described A/D converter, the output terminal of described A/D converter is connected with described MCU controller, and described MCU controller is connected with the control end of described the first electronic multi-channel switch;
Described multi-channel electrode is connected with described the second electronic multi-channel switch through described the first electronic multi-channel switch, described the second electronic multi-channel switch is connected with described electrochemical workstation, and described contrast electrode, described auxiliary electrode are connected with described electrochemical workstation simultaneously;
Described MCU controller is connected with described computing machine respectively with described electrochemical workstation, carries out data output.
Described multi-channel electrode comprises: metal bar and poly (methyl methacrylate) plate, described metal bar is equidistantly fixed on described poly (methyl methacrylate) plate.
Described metal bar becomes 5 row 20 row or 10 row 10 row, and interval 3-30cm is arranged on described poly (methyl methacrylate) plate.
The diameter of described metal bar is 1mm-8mm, and described metal bar outside is wrapped up by resin.
The beneficial effect of technical scheme provided by the invention is: this device both can have been measured corrosion current and the corrosion potential in different cement emergency area electrodes, judgement anodic site and cathodic area and corrosion situation of change, can also carry out for specific electrode the electro-chemical tests such as electrochemical impedance, linear polarization, can study comparatively easily corrosion process and corrosion mechanism, effective research means is provided.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of monitoring the device that metal corrodes in different cement accidents;
Fig. 2 is the longitudinal sectional view of multi-channel electrode;
Fig. 3 is the transverse sectional view of multi-channel electrode;
Fig. 4 is cement distribution of traffic accident situation map;
Fig. 5 is current distributing figure;
Fig. 6 is potential image;
Fig. 7 is the electrochemical impedance figure of different cement emergency area electrodes;
(a) be the schematic diagram that is related to of impedance real part and imaginary impedance; (b) be the schematic diagram that is related to of frequency and phasing degree, impedance magnitude.
In accompanying drawing, the list of parts of each label representative is as follows:
1: multi-channel electrode; 2: contrast electrode;
3: auxiliary electrode; 4: the first electronic multi-channel switch;
5: variable resistor; 6: zero resistance galvanometer;
7: sample resistance; 8: current potential follower;
9:A/D converter; 10:MCU controller;
11: the second electronic multi-channel switch; 12: electrochemical workstation;
13: computing machine; 14: poly (methyl methacrylate) plate;
15: metal bar.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below embodiment of the present invention is described further in detail.
For the corrosion current of multi-channel electrode and corrosion potential are carried out to Real-Time Monitoring, and to specifying electrode to carry out electrochemical measurement, the embodiment of the present invention provides a kind of device that metal corrodes in different cement accidents of monitoring, referring to Fig. 1, described below:
This device comprises: multi-channel electrode 1, contrast electrode 2, auxiliary electrode 3, the first electronic multi-channel switch 4, variable resistor 5, zero resistance galvanometer (ZRA) 6, sample resistance 7, current potential follower (HVF) 8, A/D converter 9, MCU controller 10, the second electronic multi-channel switch 11, electrochemical workstation 12, computing machine 13
Multi-channel electrode 1 is connected with one end of variable resistor 5 with the input end of zero resistance galvanometer 6 respectively through the first electronic multi-channel switch 4, another input end grounding of zero resistance galvanometer 6, and zero resistance galvanometer 6 is connected in parallel with variable resistor 5; The output terminal of zero resistance galvanometer 6 is connected with the input end of A/D converter 9;
Multi-channel electrode 1 is also connected with current potential follower 8 through the first electronic multi-channel switch 4 simultaneously, current potential follower 8 is in parallel with sample resistance 7, current potential follower 8 another input ends are connected with contrast electrode 2, current potential follower 8 output terminals are connected with A/D converter 9, the output terminal of A/D converter 9 is connected with MCU controller 10, and MCU controller 10 is connected with the control end of multi-way switch 4.Multi-channel electrode 1 is connected with the second electronic multi-channel switch 11 through the first electronic multi-channel switch 4, and the second electronic multi-channel switch 11 is connected with electrochemical workstation 12, and contrast electrode 2, auxiliary electrode 3 are connected with electrochemical workstation 12 simultaneously.MCU controller 10 is connected with computing machine 13 respectively with electrochemical workstation 12, carries out data output.
Wherein, multi-channel electrode 1 is equidistantly fixed on poly (methyl methacrylate) plate 14 by 100 metal bars, becomes 5 row 10 row, 10 row 10 row, and interval 3-30cm is arranged on poly (methyl methacrylate) plate, and metal bar diameter is 1mm-8mm, and metal bar outside is wrapped up by resin.
The uniform cement of the cement covering, also can simulate different cement accidents, and zones of different covers different cement accidents.Cement incident area covers the multi-channel electrode 1 of 2 row 2 row, 3 row 3 row, 4 row 4 row, 5 row 5 row, different cement emergency areas interval 1～4 row's electrode, and non-cement emergency area covers intact cement.
Referring to Fig. 2, Fig. 3, multi-channel electrode 1 used is equidistantly fixed on poly (methyl methacrylate) plate 14 by the metal bar 15 of 100 Q235 models, and the diameter of metal bar 15 is 6mm, and metal bar 15 outsides are wrapped up by resin, becomes 5 row 20 row to arrange, and metal bar 15 spacing are 8cm.
Referring to Fig. 4, a-quadrant covers water saturation soil, and B region is the cement with crackle, the cement that C region is interlayer, and D region is normal humidity soil.Soil, cement thickness are consistent, and are 5cm, and the tap water degree of depth is similarly 5cm.
Connect HVF current potential follower 8 branch roads, measure the Potential distribution situation of multi-channel electrode 1, connect ZRA zero resistance galvanometer 6 branch roads and measure the current distributions of multi-channel electrode 1, connect electrochemical workstation 12 branch roads and select an electrode of multi-channel electrode 1 to carry out the electrochemical measurements such as electrochemical impedance spectroscopy, corrosion potential, linear polarization.
Referring to the distribution of current of Fig. 5, can find out that anodic site mainly concentrates on A district and D district, namely two soil areal coverage are anodic site, other regions are cathodic area.
Referring to Fig. 5, Fig. 6, the Potential distribution of Fig. 6 and the distribution of current of Fig. 5 compare and can find, the current potential of anodic site is more negative, but differ and be decided to be anodic site in the negative region of current potential.
Electrochemical impedance figure referring to Fig. 7 can find out, the electrochemical impedance spectroscopy in A, B, C and D district all has a time constant, and the capacitive reactance arc of B region electrode is maximum, illustrates that the corrosion stability of electrode in B district is significantly better than other 3rd districts.
In sum, device in the embodiment of the present invention both can have been measured corrosion current and the corrosion potential in different cement emergency area electrodes, judgement anodic site and cathodic area and corrosion situation of change, can also carry out for specific electrode the electro-chemical tests such as electrochemical impedance, linear polarization, can study comparatively easily corrosion process and corrosion mechanism, effective research means is provided.
The embodiment of the present invention to the model of each device except do specified otherwise, the model of other devices does not limit, as long as can complete the device of above-mentioned functions, all can.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. monitor the device that metal corrodes in different cement accidents for one kind, described device comprises: multi-channel electrode, contrast electrode, auxiliary electrode, the first electronic multi-channel switch, variable resistor, zero resistance galvanometer, sample resistance, current potential follower, A/D converter, MCU controller, the second electronic multi-channel switch, electrochemical workstation, computing machine, it is characterized in that
Described multi-channel electrode is connected with described variable-resistance one end with the galvanometric input end of described zero resistance respectively through described the first electronic multi-channel switch, galvanometric another input end grounding of described zero resistance, and described zero resistance galvanometer and described variable resistor are connected in parallel; The galvanometric output terminal of described zero resistance is connected with the input end of described A/D converter;
Described multi-channel electrode is also connected with described current potential follower through described the first electronic multi-channel switch simultaneously, described current potential follower is in parallel with described sample resistance, another input end of described current potential follower is connected with described contrast electrode, described current potential follower output terminal is connected with described A/D converter, the output terminal of described A/D converter is connected with described MCU controller, and described MCU controller is connected with the control end of described the first electronic multi-channel switch;
Described multi-channel electrode is connected with described the second electronic multi-channel switch through described the first electronic multi-channel switch, described the second electronic multi-channel switch is connected with described electrochemical workstation, and described contrast electrode, described auxiliary electrode are connected with described electrochemical workstation simultaneously;
Described MCU controller is connected with described computing machine respectively with described electrochemical workstation, carries out data output.
2. a kind of device that metal corrodes in different cement accidents of monitoring according to claim 1, is characterized in that, described multi-channel electrode comprises: metal bar and poly (methyl methacrylate) plate,
Described metal bar is equidistantly fixed on described poly (methyl methacrylate) plate.
3. a kind of device that metal corrodes in different cement accidents of monitoring according to claim 2, is characterized in that, described metal bar becomes 5 row 20 row or 10 row 10 row, and interval 3-30cm is arranged on described poly (methyl methacrylate) plate.
4. according to a kind of described in claim 2 or 3, monitor the device that metal corrodes in different cement accidents, it is characterized in that, the diameter of described metal bar is 1mm-8mm, and described metal bar outside is wrapped up by resin.
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| CN201410294147.6A CN104048914B (en) | 2014-06-25 | 2014-06-25 | A kind of monitor metal device of corrosion in different cement accidents |
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| CN201410294147.6A CN104048914B (en) | 2014-06-25 | 2014-06-25 | A kind of monitor metal device of corrosion in different cement accidents |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458536A (en) * | 2014-12-16 | 2015-03-25 | 天津大学 | Device and method for measuring ion permeability of concrete, as well as application of device and method |
| CN104713820A (en) * | 2015-03-25 | 2015-06-17 | 天津大学 | Method for detecting corrosion state of metal in concrete |
| CN104897561A (en) * | 2015-06-25 | 2015-09-09 | 重庆大学 | Method for fast simulation testing corrosion property of reinforcing steel bar in concrete |
| CN107192660A (en) * | 2017-05-27 | 2017-09-22 | 中国科学院上海技术物理研究所 | It is a kind of to be used for the apparatus and method that dynamic observes Cdl-x_Znx_Te chemical attack hole |
| CN107192665A (en) * | 2017-06-05 | 2017-09-22 | 中国石油大学(华东) | The test system and method for the heterogeneous texture local corrosion of multi-electrode coupling |
| CN110186964A (en) * | 2019-04-26 | 2019-08-30 | 浙江大学 | A kind of device and method for testing the macro electric current of inside concrete reinforcement corrosion |
| CN113791030A (en) * | 2021-09-13 | 2021-12-14 | 国网山东省电力公司电力科学研究院 | Soil corrosion in-situ detection sensor for buried metal component |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458536A (en) * | 2014-12-16 | 2015-03-25 | 天津大学 | Device and method for measuring ion permeability of concrete, as well as application of device and method |
| CN104713820A (en) * | 2015-03-25 | 2015-06-17 | 天津大学 | Method for detecting corrosion state of metal in concrete |
| CN104897561A (en) * | 2015-06-25 | 2015-09-09 | 重庆大学 | Method for fast simulation testing corrosion property of reinforcing steel bar in concrete |
| CN107192660A (en) * | 2017-05-27 | 2017-09-22 | 中国科学院上海技术物理研究所 | It is a kind of to be used for the apparatus and method that dynamic observes Cdl-x_Znx_Te chemical attack hole |
| CN107192660B (en) * | 2017-05-27 | 2023-09-12 | 中国科学院上海技术物理研究所 | Device and method for dynamically observing tellurium-zinc-cadmium material chemical corrosion pits |
| CN107192665A (en) * | 2017-06-05 | 2017-09-22 | 中国石油大学(华东) | The test system and method for the heterogeneous texture local corrosion of multi-electrode coupling |
| CN110186964A (en) * | 2019-04-26 | 2019-08-30 | 浙江大学 | A kind of device and method for testing the macro electric current of inside concrete reinforcement corrosion |
| CN110186964B (en) * | 2019-04-26 | 2021-05-07 | 浙江大学 | Device and method for testing corrosion macro current of steel bar in concrete |
| CN113791030A (en) * | 2021-09-13 | 2021-12-14 | 国网山东省电力公司电力科学研究院 | Soil corrosion in-situ detection sensor for buried metal component |
| CN113791030B (en) * | 2021-09-13 | 2024-05-31 | 国网山东省电力公司电力科学研究院 | In-situ detection sensor for soil corrosion of buried metal component |
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