CN101943655A - On-line corrosion detector for reinforced concrete and method thereof - Google Patents
On-line corrosion detector for reinforced concrete and method thereof Download PDFInfo
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- CN101943655A CN101943655A CN 201010253580 CN201010253580A CN101943655A CN 101943655 A CN101943655 A CN 101943655A CN 201010253580 CN201010253580 CN 201010253580 CN 201010253580 A CN201010253580 A CN 201010253580A CN 101943655 A CN101943655 A CN 101943655A
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Abstract
The invention provides an on-line corrosion detector for reinforced concrete based on a disk electrode. The on-line detector comprises a polarization circuit (2) and a current constraint circuit (3), wherein the disk electrode (1) comprises reference electrodes RE1, RE2 and RE3, an auxiliary electrode CE (13) and a circular ring electrode GE (17); the polarization circuit (2) polarizes the reinforcing steel bars in concrete through the auxiliary electrode CE (13) and the reference electrode RE1 in the disk electrode (1); and meanwhile the current constraint circuit (3) restrains polarization current through the circular ring electrode GE (17) and potential difference between the reference electrodes RE2 and the reference electrodes RE3 so as to limit the polarization current in a projection zone of the auxiliary electrode CE (13). The invention further provides a method for measuring corrosion rate of the reinforcing steel bar in a concrete structure by using the detector. The invention improves measurement accuracy of the corrosion rate of the reinforcing steel bars in the concrete structure and avoids measurement errors caused by current over-constraint and under-constraint.
Description
Technical field
The present invention relates to the online corrosion detection range of reinforced concrete; particularly relate to a kind of steel reinforced concrete erosion on-line detector based on the self-adaptive current constraint; be a kind ofly to need not to destroy xoncrete structure, directly measure the portable corrosion detector of steel bar corrosion state in the xoncrete structure, be applicable to the on-line evaluation of corrosion investigation, corrosion inhibitor efficient and the cathodic protection effect of building concrete works.
Background technology
The health status of reinforced concrete is directly connected to the safety and the permanance of heavy construction structures such as bridge, harbour, highway, so the on-line monitoring of steel bar corrosion state has become an important project problem.The initial failure of xoncrete structure is by Cl
-What ion was invaded and concrete carbonization causes, and reinforcement corrosion is first factor, and the most directly with serious.In the marine structure because Cl
-Infiltration surpass critical concentration after, cause steel bar corrosion, concrete cover appears along the muscle cracking in the corrosion product volumetric expansion, concrete cover can come off fully when serious, quickens steel bar corrosion conversely.
The corrosion protection measure of concrete works comprises uses corrosion inhibitor and cathodic protection, however the never good on-line evaluation method of these safeguard procedures.Steel bar corrosion is that a galvanochemistry is main process, but existing many monitoring methods need be imbedded probe in xoncrete structure, can not be to building the online non-destructive monitoring of engineering construction.And when adopting linear polarization or electrochemical impedance to carry out corrosion monitoring,, cause the confidence level of corrosion rate measured value lower because polarization current is long-pending uncertain at the even plane of polarization of rebar surface skewness.
The key that concrete reinforcement erosion detects is determining as the reinforcing bar polarization area of working electrode, because all reinforcing bars are pricked by reinforcing bar and are interconnected in the engineering structure, form a bar frame that is electrically connected and links to each other, so be difficult to determine reinforcing bar polarization area in the actual engineering with the earth.This there is the people proposed ring protectiving electrode method (Guard Ring electrode method, GRM) retrain the polarization current of auxiliary electrode, make the polarization area be limited to particular range, but this technology is based on complete restriction of current realization, and carry out the self-adaptation adjustment, cause often occurring in the on-the-spot test crossing of electric current and retrain or underconstrained according to concrete resistivity and steel bar corrosion state.United States Patent (USP) 5,259, the 944th, about the patent of ring protectiving electrode corrosion monitoring, its internal circuit adopts full compensation model, do not carry out the automatic adjustment of ring protectiving electrode restriction of current according to different concrete systems, the result error that external certain the type commercial apparatus that forms according to this patent records in the building operation quality is managed is big, away from actual value.
Summary of the invention
The objective of the invention is to: a kind of high precision steel reinforced concrete erosion detection method and realization thereof based on the self-adaptive current constraint is provided, by monitoring two contrast electrode RE2 of extra increase, potential difference (PD) between the RE3, feedback factor to the restriction of current loop carries out the self-adaptation adjustment, the accurate constraint of loop current realizes polarizing, the line of electric force of polarization current accurately is limited in the zone, auxiliary electrode projecting plane, solve the measuring error that ring protectiving electrode is constrained to the auxiliary electrode polarization current or underconstrained causes, improved the accuracy of reinforcement corrosion speed measurement in the concrete.
Based on the constant potential polarization method, reinforcing bar in certain zone in the concrete is applied a constant polarized potential, measure the polarization current of reinforcing bar simultaneously, after current stabilization, read this current value, and calculating polarization resistance and reinforcement corrosion speed on the unit area by the Stern formula, the key of technical scheme is the rebar surface that how polarization current is constrained in qualification.
The steel reinforced concrete erosion detector comprises retaining ring disk electrode, polarization loop, restriction of current loop, single-chip microcomputer, automatic range selection, real-time clock, data-carrier store and power module.
Described retaining ring disk electrode is used for the constraint of polarization current, and this retaining ring disk electrode comprises that 3 contrast electrode RE1, RE2, RE3 are (by saturated Cu/CuSO
4, Ag/AgCl or MnO
2Electrode is formed), an auxiliary electrode CE and a round loop electrode GE, CE is with the coaxial placement of GE electrode and be embedded in the insulation disk, and the center of CE electrode has an aperture to be used to place contrast electrode RE1, and the two constitutes the loop input end that polarizes with reinforcing bar; Between insulation CE of disk and GE, equidistantly leave two apertures, be used to insert RE2, RE3, and form restriction of current loop input end with GE.
Described polarization loop is used for reinforcing bar is carried out current potential or current polarizing, this polarization loop comprises voltage follower A1, totalizer A2, current sampling amplifier A3 and digital to analog converter D/A1, the output signal of D/A1 can be square wave, triangular wave or sine wave, and by A2 reinforcing bar is polarized, measure response voltage V by A1 and A2 simultaneously
1With current signal I
1
Described restriction of current loop is used to retrain polarization current, and it comprises differential amplifier A4, totalizer A5 and analog to digital converter D/A2.By the electric potential difference V between A4 measure R E2, the RE3
2, and by A5 output constraint electric current, thereby the polarization current in the loop of will polarizing is limited in the CE electrode projection in zone.
Described detector also comprises single-chip microcomputer, and the built-in two-way DA converter of this single-chip microcomputer carries out signal output, and built-in multi-channel a/d converter carries out signal sampling; And calculate restriction of current coefficient and corrosion rate, store measurement result by external memory storage, and by USB interface data are sent in the host computer database when needed; Use external keyboard and LCDs to carry out man-machine interaction.
Described detector also comprises data-carrier store, power module, rechargeable battery, usb communication interface, keyboard, LCDs, as accompanying drawing 1.Detector is sealed in the cabinet of IP65 degree of protection, and single-chip microcomputer wherein connects described polarization loop, restriction of current loop, real-time clock, data-carrier store, USB communication interface, automatic range selection module, power module, keyboard and LCDs respectively.Polarization loop and restriction of current loop all are wired on the disk electrode.Described detector adopts multiple powering mode, is suitable for field condition and uses.
Beneficial effect of the present invention: steel reinforced concrete erosion on-line detector of the present invention adopts the ring protectiving electrode technology of self-adaptive current constraint, improved the accuracy that reinforcement corrosion is measured in the concrete, make ring protectiving electrode method measuring error scope be reduced to 20% from 200%, adopt the high-speed low-power-consumption single-chip microcomputer as signal generation, data acquisition, calculating and storage unit, reached the purpose of fast, accurately measuring reinforcement corrosion speed.The present invention compares with existing ring protectiving electrode steel bar corrosion pick-up unit, has following tangible advantage and characteristics:
1, the steel reinforced concrete erosion on-line detector carries out activation polarization and restriction of current by single-chip microcomputer to reinforcing bar, electric current is fully constrained in limit within the area, has improved the corrosion rate measurement accuracy.The built-in real-time circuit of instrument, electric power management circuit, USB communication module, and constraint factor and corrosion rate algorithm carry LCDs and supervisory keyboard, have the response sensitivity, and be low in energy consumption, easy to operate, portable characteristics.
2, by using RE2, RE3 contrast electrode to monitor the diversity of CE electrode polarization electric current, adopt the restriction of current loop to carry out the constraint of polarization current, accurately control the polarization area of reinforcing bar.
3, proposed according to reinforcing bar corrosion potential E
CorrWith concrete resistivity R
cCalculate the experimental formula of restriction of current coefficient lambda, to different concrete erosion systems, select suitable λ automatically, more the operative constraint polarization current distributes, and has improved reinforcement corrosion speed measurement precision in the concrete.
Description of drawings
Fig. 1: steel reinforced concrete erosion on-line detector design frame chart.
Wherein, 1. disk electrode, 2. polarization loop, 3. restriction of current loop, 4. automatic range is selected, 5. power module, 6. single-chip microcomputer, 7.USB communication interface, 8. rechargeable battery, 9. real-time clock, 10. data-carrier store, 11. keyboards, 12. LCD.
Fig. 2: the ring protectiving electrode structure of steel reinforced concrete erosion on-line detector and polarization current distribution schematic diagram.
Wherein, 13. auxiliary electrode CE, 14. contrast electrode RE1,15. contrast electrode RE2,16. contrast electrode RE3,17. ring protectiving electrode GE, 18. electrode insulation shells, 19. full water sponges, 20. reinforcing bars, 21. concrete.
Fig. 3: steel reinforced concrete erosion on-line detector circuit working synoptic diagram.
Fig. 4: the no constraint of ring protectiving electrode restriction of current, underconstrained, mistake constraint reach and are just retraining synoptic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Referring to accompanying drawing 1, steel reinforced concrete erosion on-line detector of the present invention comprises: retaining ring disk electrode 1, polarization loop 2, restriction of current loop 3, single-chip microcomputer 6.
As shown in Figure 2, described retaining ring disk electrode is used for the constraint of polarization current, and this retaining ring disk electrode comprises that 3 contrast electrode RE1, RE2, RE3 are (by saturated Cu/CuSO
4, Ag/AgCl or MnO
2Electrode is formed), an auxiliary electrode CE and a round loop electrode GE, CE and the coaxial placement of GE electrode also are embedded in the insulation disk, and it is that the aperture of 1～5mm is used to place contrast electrode RE1 that there is a diameter center of CE electrode, and the two constitutes polarization loop input end with reinforcing bar; The aperture that equidistantly to leave two diameters between insulation CE of disk and GE be 1～5mm is used to insert RE2, RE3 electrode, and forms restriction of current loop input end with GE.In the test process, be encased inside the full water sponge of one deck between disk electrode and the reinforced concrete, be used for wetting concrete.
Described polarization loop is used for reinforcing bar is carried out current potential or current polarizing, this polarization loop comprises voltage follower A1, totalizer A2, current sampling amplifier A3 and digital to analog converter D/A1, the output signal of D/A1 can be square wave, triangular wave or sine wave, and by A2 reinforcing bar is polarized, measure response voltage V by A1 and A2 simultaneously
1With current signal I
1
Described restriction of current loop is used to retrain polarization current, comprising differential amplifier A4, and totalizer A5 and analog to digital converter D/A2.By the electric potential difference V between A4 measure R E2, the RE3
2, and by A5 output constraint electric current, thereby the polarization current I in the loop of will polarizing
1Be limited in the CE electrode projection in zone.
Described detector also comprises single-chip microcomputer 6, and this single-chip microcomputer 6 uses high-speed low-power-consumption C8051F type MCU, and other module all is connected to single-chip microcomputer 6 by IO or analog port and by its control.The built-in two-way DA converter of this single-chip microcomputer carries out signal output, and built-in A/D converter carries out signal sampling; Built-in algorithms is calculated restriction of current coefficient and corrosion rate, stores measurement result by external memory storage, and by USB interface data is sent in the host computer database when needed; Man-machine interaction is undertaken by membrane keyboard and LCDs.
Described detector also comprises data-carrier store 10, power module 5, rechargeable battery 8, usb communication interface 7, keyboard 11, LCDs 12, as accompanying drawing 1.Single-chip microcomputer is installed in the IP65 degree of protection cabinet, and connects described polarization loop 2, restriction of current loop 3, real-time clock 8, data-carrier store 10, USB communication interface 7, automatic range selection module 4, power module 5, keyboard 11 and LCDs 12 respectively.Polarization loop 2 and restriction of current loop 3 all are connected on the disk electrode 1 by cable.Described detector adopts multiple powering mode, is suitable for open-air the use.
Real-time clock 9 adopts the PCF8563 clock chip; Data-carrier store 10 adopts Flash storer or ferroelectric memory; The output in polarization loop 2 and restriction of current loop 3 is undertaken by the built-in multichannel 12～16bit of single-chip microcomputer, 100k～1Msps A/D converter the voltage and the current signal sampling of disk electrode 1 by single-chip microcomputer 6 controls.
The corrosion rate measuring principle
The present invention proposes a kind of corrosion measurement method, promptly adopt ring protectiving electrode that polarization current is retrained, polarization current is limited in auxiliary electrode CE view field, to realize the accurate measurement of corrosion rate based on restriction of current.In order accurately to retrain polarization current, adopt ring protectiving electrode that the CE polarization current is retrained, its principle such as accompanying drawing 2, the principle of work of instrument is then as accompanying drawing 3.
Single-chip microcomputer (6) passes through the D/A1 output signal, and implements constant potential polarization by polarization loop (2) and CE electrode pair reinforcing bar.Single-chip microcomputer (6) is by D/A2 output constraint signal, by restriction of current loop (3) the polarization current I to the polarization loop
1Retrain, to guarantee I
1Only be distributed in the X-Y interval.The rusting rate of the ratio calculation reinforcing bar by polarized potential and polarization current.
Owing to have concrete ohmmic drop (R between RE1 and the reinforcing bar (WE)
c), therefore:
Wherein: R
pRepresent the reinforcing bar polarization resistance, unit is Ω .cm
2, γ is the arranging density of reinforcing bar in the concrete, and unit: root/cm, Δ E are the reinforcing bar polarized potential, and D represents the diameter of reinforcing bar (accompanying drawing 3); L
X-YExpression X and Y apart from (in the accompanying drawing 3 mid point of RE2 and RE3 around disc centre around circle diameter), unit is cm, I
CE: from the polarization current (I of CE
CE=I
1); Unit: Amp.
Corrosion electric current density by Stern-Geary Equation for Calculating reinforcing bar
i
Corr: the reinforcement corrosion current density, unit is uA/cm
2, the B:Stern-Geary constant, (when reinforcing bar was in active state, the B value was got 26mV to unit: mV; When reinforcing bar was in passive state, B got 52mV).
Then corrosion rate is: V=i
Corr* C, wherein C is a proportionality constant, for carbon steel C=11.74um/a.
In the actual measurement process, the length of the Lx-y of formula (1) and uncertain can diffuse to L from the electric current of CE
X-YBeyond the zone (accompanying drawing 3).When the CE electric current was applied on the great bar frame of area, electric current can weaken with the increase with the CE distance and even disappear.For this reason, will be limited to the rebar surface of CE frontal plane of projection from the electric current of CE by ring protectiving electrode GE in the accompanying drawing 3, and for control GE size of current, adopt two extra contrast electrode RE2, RE3, the two is between CE electrode and GE electrode.Before GE began polarization, instrument write down the potential difference (PD) between RE2 and the RE3 earlier
By the electric current of restriction of current loop (3) constraint from CE, make it only to be distributed in the AB zone, concrete implementation step is as follows:
1, the electric potential difference between measurement RE2, the RE3 before polarizing
2, open polarization loop (2) steel bars in concrete is carried out constant potential polarization, polarized potential is exported by D/A1;
3, basis
Determine the output valve of D/A2 in the restriction of current loop (3), and the D/A2 output potential is equaled
4, open restriction of current loop (3) the polarization loop current is compensated, guarantee that the electric potential difference between RE2, the RE3 is stabilized in
5, calculate the corrosion electric current density i of reinforcing bar according to formula (1), (2)
Corr
Because the GE output current makes
Be returned to the state before the polarization of polarization loop (2), so after the GE electrode opened, the concrete surface between electrode RE2 and RE3 flow through no current, promptly only flow to A-B zone in the accompanying drawing 3 from the polarization current of CE.
The current automatic adaptation constraint principles
Studies show that in a large number coagulate layer thickness, resistivity and steel bar corrosion state are to I
CEDistribution all influential.The retaining ring Polarization technique is in application process, because the unevenness of concrete density, water percentage and resistivity, cause the GE may be with the insufficient or constrained (see figure 4) of CE restriction of current, Fig. 4 a be the CE distribution of current of use ring protectiving electrode useless, and polarization current is dispersed far away; The CE electric current still had part to disperse when Fig. 4 b retrained for the GE undercurrent, caused rebar surface polarization area bigger than normal, and the corrosion rate of calculating is bigger than normal; Fig. 4 c causes the CE current limited for the constraint of GE excess current, and the polarization area of reinforcing bar reduces, and the corrosion rate of calculating is less than normal; Fig. 4 d then is the ideal constraint state, just in time is evenly distributed under its projecting plane from the electric current of CE, and the corrosion rate of calculating reflects its time of day.
In fact because the concrete surface conductivity is different with inner conductivity, the about beam current by GE is with the electric potential difference between RE2, the RE3
Full remuneration can not guarantee to enter from the polarization current of CE the state of Fig. 4 d to original state.Its key is the size that will determine the about beam current of ring protectiving electrode GE according to the corrosion state (open circuit potential) and the concrete resistivity of reinforcing bar, rather than relies on fully
Determine.
If
V in the formula
RE3, V
RE2Be respectively the electrode potential of contrast electrode RE3 in the disk electrode, the relative reinforcing bar of RE2, and set
Be respectively the RE2 after state of nature, CE polarization and GE compensate, the potential difference (PD) between the RE3.
Then define the restriction of current coefficient lambda:
When λ=0, there is not electric current on the GE, will disperse A-B zone beyond (accompanying drawing 3) from the electric current of CE this moment, when right
When the difference before and after CE polarization is carried out full remuneration, i.e. λ=1; Be limited in fully under the projecting plane of CE from the polarization current of CE this moment in theory, but experimental results show that: right
Full remuneration can not provide correct result, because the concrete surface electric potential difference is also inconsistent with inner electric potential difference, full remuneration tends to the polarization current of passivity reinforcing bar system was caused constraint, make the corrosion rate measurement result on the low side, activation system is then retrained deficiency, make the corrosion rate of measurement higher, therefore right according to the concrete erosion situation
Degree of compensation carry out intelligence and adjust.
Discover the main and concrete open circuit potential E of penalty coefficient λ
CorrWith concrete resistivity R
cRelevant, the correlation experience formula is:
λ＝K
0+K
1exp(E
corr/K
2)+K
3×R
c (4)
In the formula (4), the constant interval of λ is (0,1).
By a large amount of measured data matches, with the fitting coefficient K in the formula (4)
j(j=0,1,2,3) are stored among the single-chip microcomputer Flash, again by measuring the E of reinforcing bar under the state of nature
CorrWith concrete R
c, can determine constraint factor λ, with the Based Intelligent Control of realization, thereby measure reinforcement corrosion speed in the concrete more accurately to constraint factor.
The connection layout such as the accompanying drawing 3 of disk electrode 1 and steel reinforced concrete erosion on-line detector.The output terminal in loop 2 of wherein polarizing links to each other with the auxiliary electrode CE of disk electrode, is used for the output polarization electric current I
CE, the potential difference (PD) between restriction of current loop 3 measure R E2 and the RE3
And by GE output constraint electric current I
GEThe reinforcing bar that concrete is appeared (can be at same position, farthest can be at a distance of 10m～30m) shielded cable by the band crocodile clip links to each other with the working electrode WE of steel reinforced concrete erosion on-line detector with instrument, instrument carries out continuous current or constant potential polarization a period of time (10s～1000s) to reinforcing bar, open restriction of current loop (3) again, make potential difference (PD) according to formula (3) and (4)
Return to set condition, calculate reinforcement corrosion speed in the concrete by formula (1), (2) at last.
Claims (9)
1. steel reinforced concrete erosion on-line detector based on disk electrode, this on-line detector comprises polarization loop (2) and restriction of current loop (3), described disk electrode (1) comprises contrast electrode RE1, RE2 and RE3, an auxiliary electrode CE (13) and a round loop electrode GE (17), polarize to steel bars in concrete by auxiliary electrode CE (13) and the contrast electrode RE1 in the disk electrode (1) in described polarization loop (2), described restriction of current loop (3) retrain polarization current by the potential difference (PD) between round loop electrode GE (17) and contrast electrode RE2 and RE3 simultaneously, polarization current is limited in the projection in zone of auxiliary electrode CE (13), thereby realizes accurate measurement reinforcement corrosion speed in the concrete.
2. a kind of steel reinforced concrete erosion on-line detector according to claim 1 based on disk electrode, it is characterized in that, described auxiliary electrode CE (13) is positioned at the center of described retaining ring disk electrode (1), described round loop electrode GE (17) is arranged in the described retaining ring disk electrode (1) ringwise with auxiliary electrode CE (13) is coaxial, described contrast electrode RE1 is positioned at the center of described auxiliary electrode CE (13), described contrast electrode RE2 and RE3 radial arrangement are between auxiliary electrode CE (13) and round loop electrode GE (17), and the two constitutes polarization loop input end with reinforcing bar described auxiliary electrode CE (13) and contrast electrode RE1; Described contrast electrode RE2 and RE3 electrode and described round loop electrode GE (17) form restriction of current loop input end.
3. a kind of steel reinforced concrete erosion on-line detector according to claim 1 and 2 based on disk electrode, it is characterized in that, described polarization loop (2) comprises voltage follower A1, totalizer A2, current sampling amplifier A3 and digital to analog converter D/A1, this digital to analog converter D/A1 carries out constant potential or galvanostatic polarization by totalizer A2 to reinforcing bar, measures polarized potential V by voltage follower A1 and totalizer A2 simultaneously
1With polarization current I
1, to calculate polarization resistance.
4. according to the described a kind of steel reinforced concrete erosion on-line detector of one of claim 1-3 based on disk electrode, it is characterized in that, described restriction of current loop (3) is used to retrain polarization current, it comprises differential amplifier A4, totalizer A5 and analog to digital converter D/A2, the electric potential difference V between described contrast electrode RE2 and the RE3
2Measure by differential amplifier A4, about beam current is then exported from round loop electrode GE (17) by totalizer A5, thereby the polarization current in the loop (2) of will polarizing is limited in the projection in zone of auxiliary electrode CE (13).
5. according to the described a kind of steel reinforced concrete erosion on-line detector of one of claim 1-4 based on disk electrode, it is characterized in that, described tester also comprises single-chip microcomputer (6), described polarization loop (2) and restriction of current loop (3) stated of this Single-chip Controlling, and calculate restriction of current coefficient and corrosion rate, store result of calculation by external memory storage.
6. use aforesaid right and require one of 1-5 described detector that reinforced concrete is corroded the method for detection, concrete steps are:
Earlier that concrete to be measured position is moistening before measuring; to satisfy then water sponge or wet cloth is close to concrete surface; described retaining ring disk electrode (1) is close on full water sponge or the wet cloth; and guarantee that retaining ring disk electrode (1) contacts closely with full water sponge or wet cloth; described retaining ring disk electrode (1) is linked to each other with the steel reinforced concrete erosion on-line detector; the working electrode joint of detector then links to each other by the reinforcing bar of appearing in cable and the concrete, by measuring reinforcing bar polarization resistance R
pAssess inside concrete reinforcement corrosion situation, concrete steps are as follows:
A. gather the voltage difference between contrast electrode RE2 and the RE3
B. measure concrete resistivity R
cWith reinforcing bar open circuit potential E
Corr, and calculate the restriction of current coefficient lambda;
C. opening polarization loop (2) makes reinforcing bar be in polarized state;
D. open restriction of current loop (3), by the compensation output constraint electric current I of round loop electrode GE (17)
GE, make the voltage difference between contrast electrode RE2 and the RE3
Be returned to setting value, thereby make polarization current I
CEBe limited in the rebar surface under the CE projecting plane;
E. the polarized potential of sampling V
1With polarization current I
1, pass through V
1/ I
1Can calculate reinforcing bar polarization resistance R
pWith reinforcement corrosion speed.
7. method according to claim 6 is characterized in that, described restriction of current coefficient lambda calculates by experimental formula (1):
λ＝K
0+K
1exp(E
corr/K
2)+K
3×R
c
K in the formula
j(j=0,1,2,3) are undetermined coefficient, survey corrosion electric current density i down by different etching conditions
CorrWith corrosion potential E
CorrWith concrete resistivity R
cBetween mapping relations, adopt the nonlinear least square method match to calculate.
8. according to claim 6 or 7 described methods, it is characterized in that, in described step D,, calculate the compensation current potential of round loop electrode (17) according to the restriction of current coefficient lambda that calculates
Can make voltage difference
Be returned to initial value, wherein
Computing formula is as follows:
9. according to the described method of one of claim 6-8, it is characterized in that described reinforcing bar polarization resistance R
pV calculates by following formula respectively with reinforcement corrosion speed:
Wherein: γ is the arranging density of reinforcing bar in the concrete, and Δ E is the reinforcing bar polarized potential, and D represents the diameter of reinforcing bar; L
X -YExpression contrast electrode RE2 and RE3 center line mid point diametrically are around diameter of a circle that disc centre becomes, I
CEBe polarization current from auxiliary electrode CE;
By Stern-Geary Equation for Calculating reinforcement corrosion speed V:
Wherein, B is the Stern-Geary coefficient, and C is a proportionality constant.
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| CN115656027A (en) * | 2022-11-01 | 2023-01-31 | 哈尔滨工业大学 | Multi-functional wireless node is used in monitoring of steel-concrete structure corruption electrochemistry |
| CN116908084A (en) * | 2023-09-07 | 2023-10-20 | 四川利能燃气工程设计有限公司 | Water treatment agent on-site rapid evaluation and intelligent filling skid-mounted device for gathering and conveying pipe network |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0259155A (en) * | 1988-08-26 | 1990-02-28 | Nisshin Steel Co Ltd | Method for continuously casting steel and submerged nozzle |
| US5259944A (en) * | 1990-05-18 | 1993-11-09 | Geotecnia Y Cimientos, S.A.-Geocisa | Corrosion detecting probes for use with a corrosion-rate meter for electrochemically determining the corrosion rate of reinforced concrete structures |
| US5306414A (en) * | 1993-05-17 | 1994-04-26 | Regents Of The University Of California | Corrosion sensor |
-
2010
- 2010-08-16 CN CN2010102535807A patent/CN101943655B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0259155A (en) * | 1988-08-26 | 1990-02-28 | Nisshin Steel Co Ltd | Method for continuously casting steel and submerged nozzle |
| US5259944A (en) * | 1990-05-18 | 1993-11-09 | Geotecnia Y Cimientos, S.A.-Geocisa | Corrosion detecting probes for use with a corrosion-rate meter for electrochemically determining the corrosion rate of reinforced concrete structures |
| US5306414A (en) * | 1993-05-17 | 1994-04-26 | Regents Of The University Of California | Corrosion sensor |
Non-Patent Citations (1)
| Title |
|---|
| 《仪器仪表装置》 20070515 魏丰等 基于线性极化技术的钢筋腐蚀速率测量仪 29-35 1-8 第3卷, 2 * |
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