CN104048914B - A kind of monitor metal device of corrosion in different cement accidents - Google Patents
A kind of monitor metal device of corrosion in different cement accidents Download PDFInfo
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- CN104048914B CN104048914B CN201410294147.6A CN201410294147A CN104048914B CN 104048914 B CN104048914 B CN 104048914B CN 201410294147 A CN201410294147 A CN 201410294147A CN 104048914 B CN104048914 B CN 104048914B
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Abstract
The invention discloses and a kind of monitor metal device of corrosion in different cement accidents, described device includes: multi-channel electrode, reference electrode, auxiliary electrode, the first electronic multi-channel switch, variable resistance, zero resistance galvanometer, sample resistance, current potential follower, A/D converter, MCU controller, the second electronic multi-channel switch, electrochemical workstation, computer.Both corrosion current and the corrosion potential being in different cement emergency area electrode can have been measured by this device, judge anode region and cathode chamber and corrosion situation of change, can also be for specific electrode and carry out the electro-chemical test such as electrochemical impedance, linear polarization, corrosion process and corrosion mechanism can be studied, it is provided that effective research means more conveniently.
Description
Technical field
The present invention relates to corrosion field, particularly relate to a kind of monitor metal device of corrosion in different cement accidents.
Background technology
Cement is a kind of high alkalinity environment (pH value about 13), and metal surface in such a case forms passive state film, because of
This its corrosion rate is the slowest.But when because artificial or natural cause, when causing cement that crackle, interlayer, the accident such as come off occur,
Corrosion of metal speed can substantially be accelerated.In monitoring cement, the method for corrosion of metal can be divided into two classes, i.e. electrochemistry at present
Method and physical method.
Electrochemical method specifically includes that half-cell prtential measurement, polarization measurement, electrochemical noise, electrochemical impedance spectroscopy, office
Portion's electrochemical impedance spectroscopy, constant current pulse and scanning reference electrode.Physical method mainly includes visualization, vibratory drilling method, red
Outer pyrography, acoustic-emission, radiograph method, reflection of radar wave method, resistivity measurement, resistance probe method, embedded fiber conduction
Method, method based on microwave and heat reflection method.
But monitoring metal corrosion in different conditions cement, is confined to study unitary electrode respectively and is in a certain spy at present
Determine the corrosion condition in state cement, it is impossible to determine the position that local corrosion occurs, the reality that diverse location occurs can not be studied
Time the corrosion information such as current potential and electric current, these research meanses can not characterize the Dynamic Corrosion information under practical situation, not have simultaneously
The practical situation not only covered by intact cement in view of metal but also had the cement of accident to cover, based on problem above, the present invention
Propose and a kind of monitor metal device of corrosion in different cement accidents.
Summary of the invention
The invention provides and a kind of monitor metal device of corrosion in different cement accidents, the present invention is to multi-channel electrode
Corrosion current and corrosion potential monitor in real time, and to specify electrode carry out electrochemical measurement, can study and be simultaneously in
The corrosion of metal process of different cement emergency areas and corrosion mechanism, described below:
A kind of monitoring metal device of corrosion in different cement accidents, described device includes: multi-channel electrode, reference electricity
Pole, auxiliary electrode, the first electronic multi-channel switch, variable resistance, zero resistance galvanometer, sample resistance, current potential follower, A/D conversion
Device, MCU controller, the second electronic multi-channel switch, electrochemical workstation, computer,
Described multi-channel electrode hinders galvanometric input and institute with described zero respectively through described first electronic multi-channel switch
Stating variable-resistance one end to be connected, described zero hinders another input end grounding galvanometric, and described zero resistance galvanometer is variable with described
Resistor coupled in parallel connects；Described zero hinders galvanometric outfan is connected with the input of described A/D converter；
The most described multi-channel electrode is also connected with described current potential follower through described first electronic multi-channel switch, described electricity
Position follower is in parallel with described sample resistance, and another input of described current potential follower is connected with described reference electrode, described
Current potential follower outfan and described A/D converter connect, and the outfan of described A/D converter is connected with described MCU controller,
Described MCU controller is connected with the control end of described first electronic multi-channel switch；
Described multi-channel electrode is connected with described second electronic multi-channel switch through described first electronic multi-channel switch, and described
Two electronic multi-channel switch are connected with described electrochemical workstation, the most described reference electrode, described auxiliary electrode and described electrification
Work station is connected；
Described MCU controller and described electrochemical workstation are connected with described computer respectively, carry out data output.
Described multi-channel electrode includes: metal bar and poly (methyl methacrylate) plate, and described metal bar is equidistantly fixed on described organic
On glass plate.
Described metal bar becomes 5 row 20 to arrange or 10 row 10 arrange, and interval 3-30cm is arranged on described poly (methyl methacrylate) plate.
A diameter of 1mm-8mm of described metal bar, is wrapped up by resin outside described metal bar.
The technical scheme that the present invention provides provides the benefit that: this device both can have been measured and be in different cement emergency area electricity
The corrosion current of pole and corrosion potential, it is judged that anode region and cathode chamber and corrosion situation of change, it is also possible to for specific electricity
Pole carries out the electro-chemical test such as electrochemical impedance, linear polarization, can study corrosion process and corrosion mechanism more conveniently, carry
For effective research means.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation 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 electrode；
A () is the relation schematic diagram of impedance real part and imaginary impedance；B () is frequency and phase angle, the relation of impedance magnitude
Schematic diagram.
In accompanying drawing, the list of parts representated by each label is as follows:
1: multi-channel electrode；2: reference electrode；
3: auxiliary electrode；4: the first electronic multi-channel switch；
5: variable resistance；6: zero resistance galvanometer；
7: sample resistance；8: current potential follower；
9:A/D transducer；10:MCU controller；
11: the second electronic multi-channel switch；12: electrochemical workstation；
13: computer；14: poly (methyl methacrylate) plate；
15: metal bar.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below embodiment of the present invention is made further
Ground describes in detail.
In order to the corrosion current of multi-channel electrode and corrosion potential are monitored in real time, and to specifying electrode to carry out electrification
Learn and measure, embodiments provide and a kind of monitor metal device of corrosion in different cement accidents, see Fig. 1, refer to
It is described below:
This device includes: multi-channel electrode 1, reference electrode 2, auxiliary electrode the 3, first electronic multi-channel switch 4, variable resistance
5, zero resistance galvanometer (ZRA) 6, sample resistance 7, current potential follower (HVF) 8, A/D converter 9, MCU controller the 10, second electronics
Variable connector 11, electrochemical workstation 12, computer 13,
Multi-channel electrode 1 through the first electronic multi-channel switch 4 respectively with the zero resistance input of galvanometer 6 and variable resistance 5
One end is connected, another input end grounding of zero resistance galvanometer 6, and zero resistance galvanometer 6 is connected in parallel with variable resistance 5；Zero resistance electric current
The outfan of meter 6 is connected with the input 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 with take
Sample resistance 7 is in parallel, and another input of current potential follower 8 is connected with reference electrode 2, current potential follower 8 outfan and A/D converter
9 connect, and the outfan of A/D converter 9 is connected with MCU controller 10, and MCU controller 10 is connected with the control end of variable connector 4.
Multi-channel electrode 1 is connected with the second electronic multi-channel switch 11 through the first electronic multi-channel switch 4, the second electronic multi-channel switch 11 and electricity
Chem workstation 12 is connected, and reference electrode 2, auxiliary electrode 3 are connected with electrochemical workstation 12 simultaneously.MCU controller 10 and electricity
Chem workstation 12 is connected with computer 13 respectively, 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 to arrange, 10
Row 10 arranges, and interval 3-30cm is arranged on poly (methyl methacrylate) plate, and metal bar a diameter of 1mm-8mm is wrapped up by resin outside metal bar.
The most uniform cement of the cement covered, it is possible to simulate different cement accidents, zones of different covers different cement
Accident.Cement incident area covers the multi-channel electrode 1 that 2 row 2 arrange, 3 row 3 arrange, 4 row 4 arrange, 5 row 5 arrange, different cement emergency areas
Interval 1～4 row's electrodes, non-cement emergency area covers intact cement.
Seeing Fig. 2, Fig. 3, multi-channel electrode 1 used has equidistantly been fixed on by the metal bar 15 of 100 Q235 models
On machine glass plate 14, a diameter of 6mm of metal bar 15, is wrapped up by resin outside metal bar 15, becomes 5 row 20 row arrangements, metal bar
15 spacing are 8cm.
Seeing Fig. 4, a-quadrant covers water saturation soil, and B region is the cement of band crackle, and C region is the cement of interlayer, D district
Territory is normal humidity soil.Soil, cement thickness keep consistent, and for 5cm, the tap water degree of depth is similarly 5cm.
Connect HVF current potential follower 8 branch road, measure the Potential distribution situation of multi-channel electrode 1, connect ZRA zero and hinder electric current
Count 6 branch roads and measure the current distributions of multi-channel electrode 1, connect electrochemical workstation 12 branch road and select multi-channel electrode 1
One electrode carries out the electrochemical measurements such as electrochemical impedance spectroscopy, corrosion potential, linear polarization.
See the CURRENT DISTRIBUTION of Fig. 5, it can be seen that anode region is concentrated mainly on A district and D district, and namely two soil cover
District is anode region, and other regions are cathode chamber.
Seeing Fig. 5, Fig. 6, the Potential distribution of Fig. 6 and the CURRENT DISTRIBUTION of Fig. 5 compare it is found that the current potential ratio of anode region
More negative, but differ and be set to anode region in the negative region of current potential.
See the electrochemical impedance figure of Fig. 7 it can be seen that the electrochemical impedance spectroscopy in A, B, C and D district all has a time normal
Number, the capacitive reactance arc of B region electrode is maximum, illustrates that the corrosion resistance of electrode in B district is significantly better than other 3rd districts.
In sum, the device in the embodiment of the present invention both can measure the corrosion electricity being in different cement emergency area electrode
Stream and corrosion potential, it is judged that anode region and cathode chamber and corrosion situation of change, it is also possible to carry out electrification for specific electrode
Learn the electro-chemical test such as impedance, linear polarization, corrosion process and corrosion mechanism can be studied, it is provided that effectively grind more conveniently
Study carefully means.
The embodiment of the present invention is to the model of each device in addition to doing specified otherwise, and the model of other devices does not limits,
As long as the device of above-mentioned functions can be completed.
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 presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (4)
1. monitoring metal device of corrosion in different cement accidents, described device includes: multi-channel electrode, reference electricity
Pole, auxiliary electrode, the first electronic multi-channel switch, variable resistance, zero resistance galvanometer, sample resistance, current potential follower, A/D conversion
Device, MCU controller, the second electronic multi-channel switch, electrochemical workstation, computer, it is characterised in that
Described device is for measuring the corrosion current and corrosion potential being in different cement emergency area electrode, it is judged that anode region and the moon
Polar region and corrosion situation of change；
Described multi-channel electrode through described first electronic multi-channel switch respectively with described zero hinder galvanometric input and described can
One end of power transformation resistance is connected, and described zero hinders another input end grounding galvanometric, described zero resistance galvanometer and described variable resistance
It is connected in parallel；Described zero hinders galvanometric outfan is connected with the input of described A/D converter；
The most described multi-channel electrode is also connected with described current potential follower through described first electronic multi-channel switch, described current potential with
In parallel with described sample resistance with device, another input of described current potential follower is connected with described reference electrode, described current potential
Follower outfan and described A/D converter connect, and the outfan of described A/D converter is connected with described MCU controller, described
MCU controller is connected with the control end of described first electronic multi-channel switch；
Described multi-channel electrode is connected with described second electronic multi-channel switch through described first electronic multi-channel switch, described second electricity
Sub-variable connector is connected with described electrochemical workstation, the most described reference electrode, described auxiliary electrode and described electrochemistry work
Make station to be connected；
Described MCU controller and described electrochemical workstation are connected with described computer respectively, carry out data output.
The most according to claim 1 a kind of monitor metal device of corrosion in different cement accidents, it is characterised in that institute
State multi-channel electrode to include: metal bar and poly (methyl methacrylate) plate,
Described metal bar is equidistantly fixed on described poly (methyl methacrylate) plate.
The most according to claim 2 a kind of monitor metal device of corrosion in different cement accidents, it is characterised in that institute
Stating metal bar becomes 5 row 20 to arrange or 10 row 10 arrange, and interval 3-30cm is arranged on described poly (methyl methacrylate) plate.
4. monitoring metal device of corrosion in different cement accidents according to a kind of described in Claims 2 or 3, its feature exists
In, a diameter of 1mm-8mm of described metal bar, is wrapped up by resin outside described metal bar.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN104048914A CN104048914A (en) | 2014-09-17 |
| CN104048914B true CN104048914B (en) | 2016-08-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN107192665B (en) * | 2017-06-05 | 2021-09-24 | 中国石油大学(华东) | Multi-electrode coupled non-uniform structure local corrosion test system and method |
| 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 |
| 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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| GB2218520A (en) * | 1988-05-13 | 1989-11-15 | Applied Corrosion Monitoring L | Multichannel corrosion rate measurement apparatus |
| GB8826361D0 (en) * | 1988-11-10 | 1988-12-14 | Taylor Woodrow Const Ltd | Corrosion monitoring |
| CN202110125U (en) * | 2011-04-07 | 2012-01-11 | 长沙理工大学 | Laboratory detection test block for simulating reinforced concrete electrochemical corrosion |
| CN102507431B (en) * | 2011-11-14 | 2013-06-12 | 中国船舶重工集团公司第七二五研究所 | Multi-channel galvanic corrosion measurement device |
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