CN206281763U - A kind of concrete erosion electrochemical experimental device in Flow Corrosion medium - Google Patents
A kind of concrete erosion electrochemical experimental device in Flow Corrosion medium Download PDFInfo
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- CN206281763U CN206281763U CN201621083884.2U CN201621083884U CN206281763U CN 206281763 U CN206281763 U CN 206281763U CN 201621083884 U CN201621083884 U CN 201621083884U CN 206281763 U CN206281763 U CN 206281763U
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Abstract
The utility model discloses the concrete erosion electrochemical experimental device in a kind of Flow Corrosion medium, including cylindrical glass cavity and its base being provided below and the top cover for setting above；10~12 working electrodes are provided with base, reference electrode is provided with top cover with the correspondence position of base, the center of top cover is provided with 1 auxiliary electrode, be additionally provided with 1 physicochemical property monitoring probe.The working electrode is carbon steel electrode or spheroidal graphite cast-iron electrode, and it is highly 5 18mm, is that experimental provision inner concrete pours gross thickness and intends the difference of monitoring concrete layer thickness value.The utility model has broken single corrosive medium metal electrode system in conventional electrochemical device, realizes application of the electrochemical method in concrete erosion research field；By changing the species and height of working electrode, the corrosion process during various metals concrete bodies tie up to Flow Corrosion medium can be simulated, the life prediction and corrosion protection to urban water supply and sewerage pipeline are significant.
Description
Technical field
The utility model belongs to electrochemical experimental device, relates generally to the concrete erosion electricity in a kind of Flow Corrosion medium
Chemical experiment device.
Background technology
Municipal water supply and sewerage pipeline is important urban infrastructure, and development construction, living standards of the people to city is carried
Height, and the Protection significance of ecological environment is great.By Binder Materials (such as cement) by the concrete of aggregate (sand, stone) cementation and formation
Tubing is widely used in city planting ductwork, and this concrete plug easily occurs corrosion failure in various corrosive mediums.So
And, the research on piping corrosion both at home and abroad is mostly focused on metallic conduit, and the corrosion that but have ignored various concrete plugs is asked
Topic.First, iron metal pipe is typically with cement mortar liner (cement, sand, water cooperation are formed, and belong to concrete material), and
Existing research often have ignored the corrosion and failure analysis of cement mortar liner in corrosive medium, opposite with practical operation situation
From；Second, reinforced concrete sewage pipeline is used as a kind of typical concrete duct, the etching problem pole in the media such as sewage
It is serious, the accident such as easy generation breakage, surface collapse, sewage leakage, causes serious environmental pollution.Therefore, find a kind of
Effective concrete erosion detection method, parsing concrete corrosion behavior it is extremely urgent.
Electrochemical measuring method as observation material corrosion resistance a kind of important means, because it is quick, can be continuous
Monitoring and other advantages and be widely used in the corrosion research of metal water supply line, but its in the corrosion research of concrete plug should
With less.Due to by concrete material poorly conductive, preparing difficult, operation and the condition such as be difficult to standardize and limited, existing electricity
Chemical devices generally immerse corrosive medium as research object with single working metal electrode, it is difficult to for the corrosion of concrete material
Monitoring, thus limit application of the electrochemical method in concrete duct corrosion research field.
The content of the invention
The utility model aims to provide the concrete erosion electrochemical experimental device in a kind of new flow corrosive medium, beats
Limitation of the broken conventional electrochemical device in concrete erosion research is different with concrete in real-time monitoring Flow Corrosion medium
The corrosion condition of depth, and can be used to simulate the corrosion of the cast iron-liner system with cement mortar inner liner, enhance the dress
The general applicability put, the life prediction and corrosion protection to urban water supply and sewerage pipeline is significant.
The utility model is achieved by following technical solution.
A kind of concrete erosion electrochemical experimental device in Flow Corrosion medium, including cavity, base, top cover and work
Electrode, it is characterised in that the cavity is cylindrical glass cavity 1, and base 2, cylinder glass are provided with below cylindrical glass cavity 1
Top cover 5 is provided with above glass cavity 1；
It is provided with base 2 in 10~12 working electrode gaging holes 3, working electrode gaging hole 3 and is provided with working electrode 4；Bottom
Seat 2 is mutually fixed with cylindrical glass cavity 1, and top cover 5 treats that working electrode 4 is installed in cylindrical glass cavity 1, and cast concrete
And after air-drying, hardening, then be fixed on above cylindrical glass cavity 1；
It is provided with the correspondence position of base 2 on top cover 5 in 10~12 reference electrode gaging holes 6, reference electrode gaging hole 6 and is set
It is equipped with reference electrode 7；The center of top cover 5 is provided with 1 auxiliary electrode gaging hole 12, auxiliary electrode gaging hole 12 and is provided with auxiliary electricity
Pole 8；1 corrosive medium physicochemical property detection hole 9 is additionally provided with top cover 5, physicochemical property monitoring probe is stretched by the detection hole
Enter inside experimental provision；
The bottom of the side wall of cylindrical glass cavity 1 is provided with corrosive medium import 11, its side wall upper part and is equipped with corrosive medium and
Mouth 10；
The height of the working electrode 4 is 5-18mm, is that experimental provision inner concrete pours gross thickness and intends monitoring coagulation
The difference of soil thickness value, the height of working electrode (4) is not consistent.
The working electrode 4 be carbon steel electrode or spheroidal graphite cast-iron electrode, be cylinder, the cylindrical sides parcel or
Coating insulating materials, cylinder top is circular and surface exposure metal as working face；The sealing of working electrode 4 is fixed on work
In electrode gaging hole 3, it is connected with outside electro-chemical measuring apparatus by external metal joint；
The reference electrode 7 is saturated calomel reference electrode, is made up of mercury metal, calomel and saturation potassium chloride electrolyte,
It is connected with outside electro-chemical measuring apparatus by external metal joint.
The auxiliary electrode 8 is platinum plate electrode, is connected with the measurement apparatus of outside by external metal joint.
The detection of the working electrode gaging hole 3, reference electrode gaging hole 6, auxiliary electrode gaging hole 12 and corrosive medium physicochemical property
The diameter in hole 9 is 8-10mm.
The base 2 and top cover 5 are polytetrafluoroethylmaterial material.
Described corrosive medium is recycled water or sewage.
The experimental rig exports 10 and accesses the circulatory system by corrosive medium import 11 and corrosive medium, carries out corrosive medium
Electrochemistry dynamic monitoring.
The height of the experimental rig is 80-150mm, and a diameter of 100-150mm, experimental provision inner concrete pours gross thickness
It is 20-30mm.
The utility model has the beneficial effect that：
(1) the utility model is the concrete erosion electrochemical experimental device in a kind of Flow Corrosion medium, has broken biography
Single corrosive medium-metal electrode system, introduces concrete structure in system electrochemical appliance, realizes electrochemical method and exists
The application of concrete erosion research field.
(2) the utility model can simulate various metals-concrete system by changing the species and height of working electrode
Corrosion process, and carry out real-time in-situ monitoring for different depth concrete layer, be easy to study concrete material corrosion and
Failure mechanism, the life prediction and corrosion protection to urban water supply and sewerage pipeline is significant.
(3) the utility model can simulate flowing corrosive medium in armored concrete corrosion, to below concrete surface not
Carry out electrochemical measurement with the corrosion behavior of depth concrete layer, so as to deduce delamination during concrete erosion,
Microstructure and performance, to probe into the corrosion process and corrosion mechanism of concrete duct.
(4) the utility model can simulate the cast iron-interior with different-thickness cement mortar inner liner in flowing corrosive medium
The corrosion of liner body system, investigates influence of the inner liner thickness to protecting cast iron effect, and it is comprehensive that the dissolving of research liner, burn into are peeled off
The mechanism of action is closed, its protective effect in the different corrosion stages to cast-iron pipe is evaluated.
(5) the utility model device can be connected with various single channels, multi-channel electrochemical work station, by AC impedance
The measurement means such as spectrum, dynamic potential scanning, OCP, can accurately obtain the corrosion number in corrosion process under static or current system
According to, it is easy to operate, have a wide range of application, it is easy to set up efficient electrochemical Characterization means.
(6) the utility model is provided with corrosive medium physicochemical property monitoring holes at top, and monitoring probe can be stretched by the hole
Enter and carry out real-time physicochemical property monitoring in flow media, so as to obtain correlation water data information, mix in corrosion process with being analyzed
The process in leaching of soil is coagulated, is conducive to multi-angle to investigate the corrosion and destruction of concrete.
Brief description of the drawings
Fig. 1 is the structural front view of the metal erosion electrochemical experimental device in Flow Corrosion medium；
Fig. 2 is the structure top view of the metal erosion electrochemical experimental device in Flow Corrosion medium.
Reference of the present utility model is as follows：
1 --- cylindrical glass cavity 2 --- base
3 --- working electrode gaging hole 4 --- working electrodes
5 --- top cover 6 --- reference electrode gaging holes
7 --- reference electrode 8 --- auxiliary electrodes
9 --- corrosive medium physicochemical property monitoring holes 10 --- corrosive mediums are exported
11 --- corrosive medium import.12 --- auxiliary electrode gaging hole
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is further described to the utility model.
Referring to Fig. 1, Fig. 2, base 2 is provided with below cylindrical glass cavity 1, it is provided with top cover 5 above；
It is provided with base 2 in 12 working electrode gaging holes 3, working electrode gaging hole 3 and is provided with working electrode 4；Base 2 with
Cylindrical glass cavity 1 is mutually fixed；Top cover 5 is fixed on above cylindrical glass cavity 1；
It is provided with the correspondence position of base 2 on top cover 5 in 12 reference electrode gaging holes 6, reference electrode gaging hole 6 and is provided with
Reference electrode 7；The center of top cover 5 is provided with 1 auxiliary electrode gaging hole 12；1 corrosive medium physics and chemistry is additionally provided with top cover 5
Quality inspection gaging hole 9, physicochemical property monitoring probe is stretched into inside experimental provision by the detection hole；
The working electrode 4 is carbon steel electrode or spheroidal graphite cast-iron electrode, and the height of working electrode 4 is not consistent.
The lower sidewall of cylindrical glass cavity 1 is provided with corrosive medium import 11, its side wall upper part and sets corrosive medium outlet
10。
The specific installation steps of the concrete erosion electrochemical experimental device in Flow Corrosion medium of the present utility model are such as
Under：
First working electrode 4 is inserted in glass cylinder cavity 1 via working electrode gaging hole 3, working electrode 4 and polytetrafluoroethyl-ne
Alkene base 2 carries out sealing fixation, then concrete is from top to bottom poured into appointed thickness and by air-drying, after hardening, then will be poly-
Tetrafluoroethene top cover 5 is fixed on cylindrical glass cavity 1.Each reference electrode 7 inserts cylindrical glass cavity through reference electrode gaging hole 6
In 1, and fixation is sealed with polytetrafluoroethylene (PTFE) top cover 5, and auxiliary electrode 8 is installed simultaneously.Again by working electrode 4, reference electrode 7 and
The external metal joint of auxiliary electrode 8 is connected to electrochemical workstation.Flow Corrosion medium is via the corruption on cylindrical glass sky body 1
Erosion medium entrance 11 and corrosive medium outlet 10 pass through experimental provision.Corrosive medium physicochemical property monitoring holes 9 are passed through physicochemical property
Monitoring probe is with real-time monitoring, so that more data informations are obtained, preferably to analyze Flow Corrosion process.
The utility model is combined with multi-channel electrochemical work station, can simultaneously monitor the electrochemistry of multiple working electrodes on-line
Parameter.Using three-electrode system measuring principle, working electrode 4 is metal material, and auxiliary electrode 8 forms electric current with working electrode 4
Loop to measure the potential difference of working electrode 4 and auxiliary electrode 8, and according to the constant potential of reference electrode 7, you can measure work
The electrode potential of electrode 4.Meanwhile, can draw corresponding electrochemical profiles with reference to the measurement result of electric current.On the other hand, pass through
The measurement means such as ac impedance spectroscopy, dynamic potential scanning, OCP, can accurately obtain under static or current system in corrosion process
Corrosion data, so as to simulate, detect corrosion and the failure mechanism of various concrete layers.
Below as a example by monitoring the corrosion condition of the nodular cast iron pipeline with cement mortar inner liner, the present apparatus sets 12
Branch spheroidal graphite cast-iron working metal electrode, the height of working electrode is respectively 17mm, 4 kinds of specifications of 14mm, 11mm and 8mm, Mei Zhonggui
Lattice correspondence 3.The proportion of composing of cement mortar inner liner is 0.6 for the mass ratio of water, cement and sand:1:3.5.By to be supervised
The thickness of the nodular cast iron pipeline cement mortar inner liner of survey is respectively 3mm, 6mm, 9mm, 12mm, according to the height of working electrode
The principle of the difference of gross thickness and plan monitoring concrete layer thickness is poured for experimental provision inner concrete, so, mixed in experimental provision
Solidifying soil pours gross thickness for 20mm.Reference electrode is saturated calomel electrode SCE (commercially available prod), and corrosive medium is recycled water.Press
Each electrode and import and export are connected according to installation drawing, after the surface velocity about 0.8m/s of experimental provision internal corrosion medium is stable,
Electrochemical workstation is opened, the basic parameter such as spheroidal graphite cast-iron metallic property.So and experiment condition (at 25 DEG C) is input into, selection is dynamic
Potential sweep method (- 0.06V-0.06V, relative to OCP), sweep speed：0.1mV/s.The device continuously runs 3 months
Afterwards, liner depth is measured for 3mm, 6mm, 9mm, and the nodular cast iron corrosion potential at 12mm is respectively -0.57mVSCE,-
0.34mVSCE, -0.20mVSCE, -0.18mVSCE, difference is more apparent, with the basically identical (bibliography of result in document：[1]
Serdar M,L V,D. long-term corrosion behavior [J] of the stainless steel in cement mortar under chloride environment
Corrosion science, 2013,69:149-157.The spheroidal graphite cast-iron lining cement mortar pipelines such as [2] Song Yarong, Tian Yimei, Zhao Xin are again
Corrosion behavior [J] International Electrochemical science in unboiled water, 2016,11:7031-7047.).By the corrosion for comparing spheroidal graphite cast-iron
Speed, can Indirect evaluation inner liner protective value, and combine ac impedance spectroscopy, the measurement such as OCP, draw cement mortar
Liner to the protective effect of metal pipe material with the increase of thickness of inner lining enhanced conclusion.
The utility model is equally applicable to the monitoring of reinforced concrete sewage pipe corrosion condition.
On the one hand the utility model has broken single corrosive medium-metal electrode system in conventional electrochemical device, draws
Enter concrete structure, realize application of the electrochemical method in concrete erosion research field；On the other hand, by changing work
The species and height of electrode, can simulate the corrosion process during various metals-concrete bodies tie up to Flow Corrosion medium, and be directed to
Different depth concrete layer carries out real-time in-situ monitoring, is easy to study corrosion and the failure mechanism of concrete material, and city is given
The life prediction and corrosion protection of drainage pipeline are significant.
Claims (8)
1. a kind of concrete erosion electrochemical experimental device in Flow Corrosion medium, including cavity, base, top cover and work electricity
Pole, it is characterised in that the cavity is cylindrical glass cavity (1), and base (2) is provided with below cylindrical glass cavity (1), circle
Top cover (5) is provided with above post glass chamber (1)；
It is provided with base (2) in 10~12 working electrode gaging holes (3), working electrode gaging hole (3) and is provided with working electrode
(4)；Base (2) is mutually fixed with cylindrical glass cavity (1), and top cover (5) treats that cylindrical glass cavity (1) interior working electrode (4) install
Finish, and cast concrete and by air-drying, after hardening, then it is fixed on above cylindrical glass cavity (1)；
10~12 reference electrode gaging holes (6), reference electrode gaging hole (6) are provided with top cover (5) with the correspondence position of base (2)
Inside it is provided with reference electrode (7)；The center of top cover (5) is provided with 1 auxiliary electrode gaging hole (12), auxiliary electrode gaging hole (12)
It is provided with auxiliary electrode (8)；1 corrosive medium physicochemical property detection hole (9), physicochemical property monitoring are additionally provided with top cover (5)
Probe is stretched into inside experimental provision by the detection hole；
The bottom of cylindrical glass cavity (1) side wall is provided with corrosive medium import (11), its side wall upper part and is equipped with corrosive medium and
Mouth (10)；
The height of the working electrode (4) is 5-18mm, is that experimental provision inner concrete pours gross thickness and intends monitoring concrete
The difference of layer thickness value, the height of working electrode (4) is not consistent.
2. the concrete erosion electrochemical experimental device in a kind of Flow Corrosion medium according to claim 1, its feature
Be that the working electrode (4) is carbon steel electrode or spheroidal graphite cast-iron electrode, is cylinder, the cylindrical sides parcel or
Coating insulating materials, cylinder top is circular and surface exposure metal as working face；Working electrode (4) sealing is fixed on work
Make in electrode gaging hole (3), be connected with outside electro-chemical measuring apparatus by external metal joint.
3. the concrete erosion electrochemical experimental device in a kind of Flow Corrosion medium according to claim 1, its feature
It is that the reference electrode (7) is saturated calomel reference electrode, is made up of mercury metal, calomel and saturation potassium chloride electrolyte, leads to
External metal joint is crossed to be connected with outside electro-chemical measuring apparatus.
4. the concrete erosion electrochemical experimental device in a kind of Flow Corrosion medium according to claim 1, its feature
It is that the auxiliary electrode (8) is platinum plate electrode, is connected with the measurement apparatus of outside by external metal joint.
5. the concrete erosion electrochemical experimental device in a kind of Flow Corrosion medium according to claim 1, its feature
It is, the inspection of the working electrode gaging hole (3), reference electrode gaging hole (6), auxiliary electrode gaging hole (12) and corrosive medium physicochemical property
The diameter of gaging hole (9) is 8-10mm.
6. the concrete erosion electrochemical experimental device in a kind of Flow Corrosion medium according to claim 1, its feature
It is that described corrosive medium is recycled water or sewage.
7. the concrete erosion electrochemical experimental device in a kind of Flow Corrosion medium according to claim 1, its feature
It is that the experimental provision exports (10) and accesses the circulatory system by corrosive medium import (11) and corrosive medium, carries out corrosion Jie
The electrochemistry dynamic monitoring of matter.
8. the concrete erosion electrochemical experimental device in a kind of Flow Corrosion medium according to claim 1, its feature
It is that the height of the experimental provision is 80-150mm, and a diameter of 100-150mm, experimental provision inner concrete pours gross thickness and is
20-30mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621083884.2U CN206281763U (en) | 2016-09-27 | 2016-09-27 | A kind of concrete erosion electrochemical experimental device in Flow Corrosion medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621083884.2U CN206281763U (en) | 2016-09-27 | 2016-09-27 | A kind of concrete erosion electrochemical experimental device in Flow Corrosion medium |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290139A (en) * | 2016-09-27 | 2017-01-04 | 天津大学 | Concrete erosion electrochemical experimental device in Flow Corrosion medium |
| CN107727564A (en) * | 2017-10-24 | 2018-02-23 | 天津大学 | The electrochemical testing device of metal microbiologic(al) corrosion under current system |
| CN109827898A (en) * | 2019-03-29 | 2019-05-31 | 河海大学 | A kind of metal corrosion test device |
| CN109827999A (en) * | 2019-03-19 | 2019-05-31 | 南京工程学院 | A kind of building performance monitoring system based on conducting concrete |
-
2016
- 2016-09-27 CN CN201621083884.2U patent/CN206281763U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290139A (en) * | 2016-09-27 | 2017-01-04 | 天津大学 | Concrete erosion electrochemical experimental device in Flow Corrosion medium |
| CN107727564A (en) * | 2017-10-24 | 2018-02-23 | 天津大学 | The electrochemical testing device of metal microbiologic(al) corrosion under current system |
| CN109827999A (en) * | 2019-03-19 | 2019-05-31 | 南京工程学院 | A kind of building performance monitoring system based on conducting concrete |
| CN109827898A (en) * | 2019-03-29 | 2019-05-31 | 河海大学 | A kind of metal corrosion test device |
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Granted publication date: 20170627 Effective date of abandoning: 20230707 |