CN101419153A - Automatic acquisition multichannel accelerated attack test device for measuring anti corrosion capability against chloride ion - Google Patents
Automatic acquisition multichannel accelerated attack test device for measuring anti corrosion capability against chloride ion Download PDFInfo
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- CN101419153A CN101419153A CNA2007100473823A CN200710047382A CN101419153A CN 101419153 A CN101419153 A CN 101419153A CN A2007100473823 A CNA2007100473823 A CN A2007100473823A CN 200710047382 A CN200710047382 A CN 200710047382A CN 101419153 A CN101419153 A CN 101419153A
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Abstract
The invention relates to an automatic acquisition multi-channel accelerated corrosion test device for measuring the capability against the erosion of chloride ions. A common three-electrode potentiostat is utilized to form a set of device system capable of synchronously measuring a plurality of test samples and automatically recording test data through an integrated circuit, a software and an electrolytic bath which are integratedly and independently developed. The device overcomes the defect that the quantity of the test samples for accelerated corrosion tests at home and abroad is limited by channels of the potentiostat, greatly saves test cost, enlarges test scale, and saves test time. The invention has convenient and simple use, and provides the low-cost and high-efficiency test device for evaluating the capabilities of cement-based grout materials and concrete materials against the erosion of the chloride ions.
Description
Technical field
The correlative technology field that the building materials that the present invention relates to construct detect, specifically a kind of automatic acquisition multichannel accelerated corrosion test device of measuring the resisting chloride ion penetration erosional competency of cement-based grouting material and concrete material.
Background technology
In recent years, the problem of presstressed reinforcing steel corrosion is more and more serious in the post stretching structure.In the construction, behind the stretch-draw steel wire bundle, grouting is used to be fed into prestress pipe, fills up the space in the prestress pipe.Grouting provides an alkalescence protection barrier for presstressed reinforcing steel, and makes presstressed reinforcing steel and concrete good binding, guarantees prestressed effective transmission between them.Pressurized concrete around the prestressed pore passage is the initial barrier that prevents the corrosive elements invasion, and the grouting material is to resist the last line of defense that corrosive medium invades presstressed reinforcing steel.Discover that the corrosion of presstressed reinforcing steel all has very big relation with the chlorion intrusion grouting in a lot of post stretching structures.Prestressed structure, particularly under the higher coastland of some villaumite concentration and winter a large amount of deicer salts operating positions, in case grouting material resisting chloride ion penetration erosional competency a little less than, chlorion just can just can break through easily in the short period of time grouting the defence line, and then the corrosion presstressed reinforcing steel.Therefore, be necessary before construction, the resisting chloride ion penetration erosional competency of grouting to be estimated.
The test of resisting chloride ion penetration erosional competency mainly contains three kinds of methods in the laboratory at present: natural immersion method, electric flux method and accelerated corrosion method.The test duration of natural immersion method is long, needs 90d, and very big slicer error, titration error, error of fitting are arranged, and all processes needs manual carrying out, and experimental error reaches about 20-25%, seldom uses now.The electric flux method is the DC voltage that applies 60V in the sample both sides of Φ 95 * 50mm, estimates the resisting chloride ion penetration erosional competency by detecting the electric weight size that flows through in 6 hours.It is applicable to the influence to the resisting chloride ion penetration erosional competency of check starting material and match ratio.Measure the resisting chloride ion penetration erosional competency of being in the milk in the post stretching structure in this way, present this method still has a lot of blames.Major defect has: one, test voltage is too high, and electrode reaction is inevitable, influences the accuracy of measurement result, moreover the joule heating effect in the circuit can cause measuring result error equally; Two, test macro is non-steady-state system, and current fluctuation is big, if press 30 minutes record primary currents of standard-required, will cause bigger error.If electric current is too small, Instrument measuring precision can influence the accuracy of measurement result.The accelerated corrosion method is that U.S. post-tensioned prestressing association proposes a kind of method recently, and the experiment ultimate principle is simulation chlorion process to the accelerated erosion of grouting material under the constant driving effect.Its unique distinction has been to construct in a creative way a sample that is similar to prestressed pore passage structure in the engineering, makes the sample systematization, more levels off to reality.But the method that adopts U.S. post-tensioned prestressing association to recommend need be used potentiostat, and the home market mostly is the single pass potentiostat of three electrodes greatly, and 6 passage potentiostats of a small amount of import cost an arm and a leg.Because the discreteness of cement-based grouting material test data is bigger, accelerated corrosion test generally requires the measurement sample of same material to be at least 6, therefore the single channel potentiostat obviously can not satisfy testing requirements, and 6 passage potentiostats a kind of grouting material of energy measurement only at every turn.Therefore, both just use 6 expensive passage potentiostats, can not compare the resistance to corrosion of different materials simultaneously.In addition, the accelerated corrosion test cycle is grown (400～1000 hours), and test apparatus passage deficiency has seriously restricted the efficient of accelerated corrosion test and applied.
Summary of the invention
The purpose of this invention is to provide a kind of automatic acquisition multichannel accelerated corrosion test device of measuring the resisting chloride ion penetration erosional competency, solved the traditional employed test unit price of accelerated corrosion method height, and can not satisfy the measurement of a plurality of samples simultaneously, can not compare the problem of the resistance to corrosion of different materials simultaneously.
For achieving the above object, the present invention has adopted following technical scheme:
The invention discloses a kind of automatic acquisition multichannel accelerated corrosion test device of measuring the resisting chloride ion penetration erosional competency, comprise
One electrolytic bath is to place sample;
One three electrode potentiostat, so that research electrode, contrast electrode and auxiliary electrode to be provided, described contrast electrode and auxiliary electrode are connected with the electrode tip of electrolytic bath;
One ammeter is connected in the sample testing circuit, to measure the electric current of sample testing circuit;
It is characterized in that: described device also comprises
One integral control circuit, circuit comprise the test subcircuits of a plurality of parallel connections, connect into the sample testing circuit with research electrode, each sample and the ammeter of potentiostat of input;
One PC is connected with ammeter and integral control circuit, to control sample testing process and record, processing test data.
Wherein, described electrolytic bath is made up of the glass cover of a big glassware and design, is respectively equipped with the hole of inserting of a plurality of research electrodes, an auxiliary electrode and a contrast electrode on the glass cover.
The method of testing of cement-based grouting material that the present invention relates to and concrete material resisting chloride ion penetration erosional competency, this method step is as follows: 1, utilize automatic acquisition multichannel accelerated corrosion test device of the present invention to record the current value size of each sample at experimental session.2, to above-mentioned data set that obtains and corresponding time, make electric current-time curve, the time that electric current increases suddenly is etching time, judges the power relatively of the resisting chloride ion penetration erosional competency of various grouting material with the length of etching time.
Beneficial effect of the present invention:
1, the present invention is an accelerated corrosion test device of measuring cement-based grout material and the erosion of concrete material resisting chloride ion penetration.
2, the present invention improves common three electrode potentiostats by the surface-mounted integrated circuit of independent research, obtains the extendible hyperchannel current potential of stable output, can satisfy the quantitative requirement of various sample.
3, the present invention has realized control output potential number of channels, the adjusting of Experiment Data Records by the software of independent development.
4, the present invention places same experimental enviroment by the electrolytic bath of autonomous Design with a plurality of measurement samples, and shared same contrast electrode and auxiliary electrode have improved experimental precision, have saved test consumable.
5, the present invention measures fast, and convenient, data stabilization is reliable, and cost is low, can provide effective instrument support for wideling popularize of accelerated corrosion test.
Description of drawings
Fig. 1 is an automatic acquisition multichannel accelerated corrosion test device synoptic diagram of the present invention.
Fig. 2 is the surface-mounted integrated circuit structural drawing.
Fig. 3 is the electric current-time plot of test.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
A kind of automatic acquisition multichannel accelerated corrosion test device of measuring the resisting chloride ion penetration erosional competency as shown in Figure 1, comprises an electrolytic bath 3, to place sample; One three electrode potentiostat 1, so that research electrode, contrast electrode and auxiliary electrode to be provided, described contrast electrode and auxiliary electrode are connected with the electrode tip of electrolytic bath; One ammeter 5 is connected in the sample testing circuit, to measure the electric current of sample testing circuit; One integral control circuit 2, circuit comprise the test subcircuits of a plurality of parallel connections, connect into the sample testing circuit with research electrode, each sample and the ammeter of potentiostat of input; One PC 4 is connected with ammeter and integral control circuit, to control sample testing process and record, processing test data.
Provide power interface, RS232 interface (serial ports), port to show that charactron, Activc LED light, Working LED light, resistance insert selection, IO access interface, ammeter access interface on the described surface-mounted integrated circuit 2, Fig. 2 is the surface-mounted integrated circuit structural drawing.
Each several part is described as follows.
(1) power interface: external standard 12V (700mA) power supply;
(2) RS232 interface: be exactly the serial ports of often saying, can be connected on the computer with common Serial Port Line.By software setting working port and interval time;
(3) port shows charactron: the port numbering Working Port that shows current connection;
(4) Active LED light: the current port led that is in state of activation, this port is in state of activation, and then pilot lamp is bright;
(5) Working LED light: the current port led that is in on-state, this port is connected, and correspondence then pilot lamp is bright;
(6) resistance inserts and selects: the wire jumper that whether uses resistance on the substrate.If use this resistance, this wire jumper of short circuit then; When not using, then disconnect this wire jumper;
(7) IO access interface: IO mouth access interface connects common port.
(8) ammeter access interface: the port that connects universal electric meter.
Automatic acquisition multichannel accelerated corrosion test device of the present invention, with 18 passages is example, the check box of Active1～Active18 on the software operation interface is controlled current activation port, activate the quantity decision of port number by external sample, this design has guaranteed that experimental sample quantity can free increase and decrease.The radio box of Working1～Working18 is controlled the port of current connection.In the software can be set interval time in addition, unit is a millisecond, and be the interval time of current value record on each sample this interval time.Current values changes and can suitably increase interval time when little in the experiment, when electric current is in sudden change when critical, can reduce interval time, has guaranteed the accuracy of experimental result.After selecting computer and com port that control panel is connected, just parameter downloads can be arrived control panel.Simple and easy to use.
Automatic acquisition multichannel accelerated corrosion test device of the present invention, electrolytic bath 3 is made up of a big glassware and specially designed glass cover, has reserved the hole of inserting of a plurality of research electrodes, an auxiliary electrode and a contrast electrode on the glass cover respectively.During experiment, can take out the sample that has corroded at any time, put into new sample.Because the shared same contrast electrode of a plurality of research electrodes, got rid of the influence of contrast electrode potential change, and the research electrode same experimental situation that coexists, improved experimental precision, saved the experiment consumptive material.
Automatic acquisition multichannel accelerated corrosion test device of the present invention, used ammeter 5 is the universal electric meter with infrared delivery outlet.Ammeter one end connects the resistance common port, and the other end connects the other end of resistance, by the resistance of switch control connection.Each constantly only has a switch connection, and rest switch all is in off-state.The resistance of the small resistor on the integrated circuit parallel branch is 1 Ω, so the magnitude of voltage surveyed of universal electric meter is the current value of sample branch road.The current value that records is imported computer automatically by software driver.
Grouting material of the present invention and concrete material resisting chloride ion penetration erosional competency are mainly estimated with the length of sample etching time.Etching time is to begin to increase during this period of time suddenly to corrosion current from experiment.The accelerated corrosion time that experiment obtains can not be contacted directly with the etching time in the actual engineering, but can obtain the power relatively of the resisting chloride ion penetration erosional competency of various grouting materials.
Automatic acquisition multichannel accelerated corrosion test device of the present invention, contrast electrode adopts saturated calomel electrode, and auxiliary electrode adopts the Pt electrode, and electrolytic solution adopts the NaCl solution of 5wt%.
A collection of grouting sample is prepared in the laboratory.Sample is one section reinforcing bar with the grouting parcel in the pvc pipe cover.Concrete method for making is as follows: earlier bottom and complete pvc pipe cover are bondd, to be injected into 1/3 pipe box with the grouting that distilled water is mixed system again, insert the reinforcing bar that cleaned with acetone in advance, rotating reinforcing bar overflows the bubble in the grouting, and then inject 1/3 grouting, rotate reinforcing bar again, to filling the pvc pipe cover.Reinforcing bar must vertically hit exactly in the pvc pipe cover, so just can make the thickness uniformity of reinforcing bar outside surface.After sample maintenance a period of time, remove part pvc pipe cover, exposed part is exactly the part that chlorion will infiltrate.
After sample production finishes, connect as Fig. 1, the research electrode tip of common three electrode potentiostats 1 links to each other with the common port of surface-mounted integrated circuit, each sample again with Fig. 1 in P1, P2 ... end is connected.Potentiostat imposes on constant potential of sample, is generally 200mvSCE, selects on the surface-mounted integrated circuit to insert resistance, selects active circuit in the software, determines interval time of measurement, is downloaded to surface-mounted integrated circuit.Ammeter just can be measured a certain branch current automatically in each interval like this, and imports computer automatically, and the charactron on the surface-mounted integrated circuit can show this branch road number.Is etching time from loading certain potentials to sample during this period of time to the unexpected increase of sample branch current, and this etching time is used to judge resisting chloride ion penetration erosional competency strong and weak relatively of various grouting material.Typical current-time curve such as Fig. 3.
This laboratory adopts that Portland cement is starched only, cement special base grouting material 1, cement special base grouting material 2 experimentize, and the result goes into following table:
| Water cement ratio | Polarized potential | Etching time | |
| Portland cement is starched only | 0.45 | 200mV SCE | 202h |
| Cement special |
0.27 | 200mV SCE | 435h |
| Cement special |
0.27 | 200mV SCE | 1063h |
Claims (2)
1, a kind of automatic acquisition multichannel accelerated corrosion test device of measuring the resisting chloride ion penetration erosional competency comprises an electrolytic bath, to place sample;
One three electrode potentiostat, so that research electrode, contrast electrode and auxiliary electrode to be provided, described contrast electrode and auxiliary electrode are connected with the electrode tip of electrolytic bath;
One ammeter is connected in the sample testing circuit, to measure the electric current of sample testing circuit; It is characterized in that: described device also comprises
One integral control circuit, circuit comprise the test subcircuits of a plurality of parallel connections, connect into the sample testing circuit with research electrode, each sample and the ammeter of potentiostat of input;
One PC is connected with ammeter and integral control circuit, to control sample testing process and record, processing test data.
2, a kind of automatic acquisition multichannel accelerated corrosion test device of measuring the resisting chloride ion penetration erosional competency according to claim 1, it is characterized in that: described electrolytic bath is made up of the glass cover of a big glassware and design, is respectively equipped with the hole of inserting of a plurality of research electrodes, an auxiliary electrode and a contrast electrode on the glass cover.
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| CN2007100473823A CN101419153B (en) | 2007-10-24 | 2007-10-24 | Automatic acquisition multichannel accelerated attack test device for measuring anti corrosion capability against chloride ion |
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| CN2007100473823A CN101419153B (en) | 2007-10-24 | 2007-10-24 | Automatic acquisition multichannel accelerated attack test device for measuring anti corrosion capability against chloride ion |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004072A (en) * | 2010-09-20 | 2011-04-06 | 中国兵器工业第五九研究所 | Method and device for chlorine ion penetration test of non-conductive coating |
| CN102183453A (en) * | 2011-01-24 | 2011-09-14 | 南通宝钢钢铁有限公司 | Method for measuring potential of micro electrode of chlorine ion corrosion resistant anti-seismic steel |
| CN105092461A (en) * | 2015-09-14 | 2015-11-25 | 北京科技大学 | Metal corrosion high-throughput characterization experimental apparatus based on image |
| CN105954183A (en) * | 2016-06-07 | 2016-09-21 | 宁波工程学院 | Terminal device for detecting or monitoring reinforced concrete structure durability experiment parameters |
| CN107192640A (en) * | 2017-07-12 | 2017-09-22 | 广西路桥工程集团有限公司 | Concrete soak test device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2218520A (en) * | 1988-05-13 | 1989-11-15 | Applied Corrosion Monitoring L | Multichannel corrosion rate measurement apparatus |
| CN2238433Y (en) * | 1995-05-08 | 1996-10-23 | 中国科学院金属腐蚀与防护研究所 | Metallic corrosion speed measuring device |
| DE69915679T2 (en) * | 1998-12-10 | 2005-02-17 | Baker-Hughes Inc., Houston | METHOD AND SYSTEM FOR CORROSION MEASUREMENT THROUGH DETERMINATION OF THE ELECTROCHEMICAL NOISE |
| CN2750317Y (en) * | 2004-12-09 | 2006-01-04 | 中国船舶重工集团公司第七二五研究所 | Multi-channel galvanic corrosion experiment data collecting device |
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2007
- 2007-10-24 CN CN2007100473823A patent/CN101419153B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004072A (en) * | 2010-09-20 | 2011-04-06 | 中国兵器工业第五九研究所 | Method and device for chlorine ion penetration test of non-conductive coating |
| CN102004072B (en) * | 2010-09-20 | 2013-04-24 | 中国兵器工业第五九研究所 | Method and device for chlorine ion penetration test of non-conductive coating |
| CN102183453A (en) * | 2011-01-24 | 2011-09-14 | 南通宝钢钢铁有限公司 | Method for measuring potential of micro electrode of chlorine ion corrosion resistant anti-seismic steel |
| CN105092461A (en) * | 2015-09-14 | 2015-11-25 | 北京科技大学 | Metal corrosion high-throughput characterization experimental apparatus based on image |
| CN105092461B (en) * | 2015-09-14 | 2018-01-02 | 北京科技大学 | A kind of metal erosion iron-enriched yeast experimental provision based on image |
| CN105954183A (en) * | 2016-06-07 | 2016-09-21 | 宁波工程学院 | Terminal device for detecting or monitoring reinforced concrete structure durability experiment parameters |
| CN105954183B (en) * | 2016-06-07 | 2019-05-10 | 宁波工程学院 | A kind of terminal installation for detecting or monitoring for reinforced concrete structure durability experiment parameter |
| CN107192640A (en) * | 2017-07-12 | 2017-09-22 | 广西路桥工程集团有限公司 | Concrete soak test device |
| CN107192640B (en) * | 2017-07-12 | 2023-10-03 | 广西路桥工程集团有限公司 | Concrete soaking test device |
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