CN206862853U - A kind of device of open-circuit potential of the measure metal in Simulated Soil Solution - Google Patents
A kind of device of open-circuit potential of the measure metal in Simulated Soil Solution Download PDFInfo
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- CN206862853U CN206862853U CN201720375800.0U CN201720375800U CN206862853U CN 206862853 U CN206862853 U CN 206862853U CN 201720375800 U CN201720375800 U CN 201720375800U CN 206862853 U CN206862853 U CN 206862853U
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- CN
- China
- Prior art keywords
- oxygen content
- electrochemical workstation
- wire
- soil solution
- simulated soil
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- 239000002689 soil Substances 0.000 title claims abstract description 30
- 239000002184 metal Substances 0.000 title claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000001301 oxygen Substances 0.000 claims abstract description 34
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 13
- 229910052802 copper Inorganic materials 0.000 claims abstract description 13
- 239000010949 copper Substances 0.000 claims abstract description 13
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 11
- 238000010792 warming Methods 0.000 claims abstract description 6
- 229920001971 elastomer Polymers 0.000 claims description 12
- 230000010287 polarization Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 2
- 235000009508 confectionery Nutrition 0.000 claims 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims 1
- 229910052753 mercury Inorganic materials 0.000 claims 1
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229940075397 calomel Drugs 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000000415 inactivating effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
A kind of device of open-circuit potential of measure metal in Simulated Soil Solution, including conical flask（4）, electrochemical workstation（13）, saturated calomel electrode（11）, oxygen content display（14）, oxygen content tester（15）, Pt electrodes（16）, salt bridge（17）, working electrode（18）, heater（19）With warming module（20）.Working electrode connects the working electrode junction of electrochemical workstation by copper conductor（8）；Salt bridge connects saturated calomel electrode, and saturated calomel electrode connects the reference electrode junction of electrochemical workstation（9）；Pt electrodes connect the auxiliary electrode junction of electrochemical workstation by wire（12）；Oxygen content tester connects oxygen content display by wire；Airway tube（2）Pass through rotary switch（5）Connect gas bottle（1）；Computer（10）Connect electrochemical workstation；A heater is put under conical flask.The utility model device can determine open-circuit potential of the metal in Simulated Soil Solution.
Description
Technical field
A kind of device of open-circuit potential of measure metal in Simulated Soil Solution is the utility model is related to, belongs to metal
Corrosion test technical field.
Background technology
The metals such as Q235 steel, galvanized steel make its corrosion rate drop significantly in some corrosive mediums, due to forming passivating film
It is low, and become corrosion resistant metal.But passive state is formed or destroyed under certain electrochemical conditions.In certain current potential bar
Under part, passive state is destroyed, and pitting just generates.Therefore, when the metal for having inactivating performance is carried out anode polarization, make up to
During a certain current potential, electric current is flown up, and is destroyed along with passivity, produces etch pit.Before this current potential, metal keeps blunt
Property, although or produce hot spot, and can is soon passivated again, and this current potential is called open-circuit potential.Critical pitting electricity
Position is usually used in evaluating the pitting tendentiousness of metal material.More just, the resistance to pitting performance of metal is better for open-circuit potential.
In general, open-circuit potential becomes according to the composition of solution, temperature, oxygen content of solution etc..Determine critical hole
It is very necessary to the research resistance to pore performance of metal to lose current potential, does not there is the critical hole for being directed to metal in Simulated Soil Solution at present
Lose the experimental rig of current potential.
The content of the invention
The purpose of this utility model is, in order to determine influence problem of the open-circuit potential to the resistance to pore performance of metal, this reality
A kind of device for determining open-circuit potential of the metal in Simulated Soil Solution is provided with new.
The technical solution of the utility model is as follows：A kind of open-circuit potential of measure metal in Simulated Soil Solution
Device includes conical flask, electrochemical workstation, saturated calomel electrode, oxygen content display, oxygen content tester, Pt electrodes, salt
Bridge, working electrode, heater and warming module.
The conical flask is provided with rubber stopper, be inserted with successively respectively on rubber stopper airway tube, connect working electrode wire,
The wire for connecting salt bridge, the wire, the wire of connection oxygen content tester that connect Pt electrodes；Temperature is there is also mounted in the conical flask
Feel module；Working electrode connects the working electrode junction of electrochemical workstation by copper conductor；Salt bridge is connected full by wire
And calomel electrode, saturated calomel electrode connect the reference electrode junction of electrochemical workstation by wire；Pt electrodes are by leading
Line connects the auxiliary electrode junction of electrochemical workstation；Oxygen content tester connects oxygen content display by wire；Air guide
The pipe other end connects gas bottle outside bottle by rotary switch；Computer connects electrochemical workstation；Put under the conical flask
One heater.
There is a conduit outside the copper conductor of the working electrode connection, through rubber stopper, the conduit and copper conductor are used respectively
First fastener, the second fastener are fixed.
The computer control electrochemical workstation carries out automatically scanning measure polarization curve.
The contact of the working electrode and copper conductor must apply envelope, ensure its insulating properties.
The gas bottle and airway tube can change Simulated Soil Solution oxygen content by adding oxygen or other gases, and
The molten amount of oxygen in Simulated Soil Solution is accurately determined by oxygen content tester.
The beneficial effects of the utility model are that it is critical in Simulated Soil Solution that the utility model device can determine metal
Pitting Potential；The utility model apparatus structure is simple, by computer electrochemical workstation can be controlled to carry out automatically scanning measure
Polarization curve, can the influence of learning gas and temperature to open-circuit potential.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Wherein 1 is gas bottle, and 2 be airway tube, and 3 be rubber stopper, and 4 be conical flask, and 5 be rotary switch, and 6 be the first fastening
Part, 7 be the second fastener, and 8 be working electrode junction, and 9 be reference electrode junction, and 10 be computer, and 11 be saturation calomel
Electrode, 12 be auxiliary electrode connection, and 13 be electrochemical workstation, and 14 be oxygen content display, and 15 be oxygen content tester, 16
It is salt bridge for Pt electrodes, 17,18 be working electrode, and 19 be heater, and 20 be warming module.
Embodiment
Specific embodiment of the present utility model is as shown in Figure 1.
A kind of device for determining open-circuit potential of the metal in Simulated Soil Solution of the present embodiment include conical flask 4,
Electrochemical workstation 13, saturated calomel electrode 11, oxygen content display 14, oxygen content tester 15, Pt electrodes 16, salt bridge 17,
Working electrode 18, heater 19 and warming module 20.
The conical flask 4 of the present embodiment is sealed with rubber stopper 3, and airway tube 2 communicates through the rubber stopper 3 with gas bottle 1, in
Between a rotary switch 5 is set, working electrode 18 is connected with copper conductor, has a conduit outside copper conductor, described through rubber stopper 3
Conduit and copper conductor are fixed with the first fastener 6, the second fastener 7 respectively, and copper conductor is connected with the junction of working electrode 18；
Salt bridge 17 passes through rubber stopper 3, there is a saturated calomel electrode 11, the saturated calomel electrode 11 and reference electrode in the salt bridge 17
Junction 9 is connected, and Pt electrodes 16 pass through rubber stopper 3, are connected with auxiliary electrode junction 12, oxygen content tester 15 and oxygen
Content display 14 is connected, and a temperature-sensitive module 20, the working electrode junction 8, reference electrode connection are set in conical flask 4
Place 9 and auxiliary electrode junction 12 are on electrochemical workstation 13, and the electrochemical workstation 13 is connected with computer 10, institute
State 4 times one heaters 19 of storing of conical flask.
The concrete operation step that the present embodiment is used to test is as follows：
（1）Working electrode to be measured prepares：Working electrode is passivated, it is packaged, it is stand-by；
（2）Connected the line by Fig. 1；
（3）Make the electrochemical workstation progress automatically scanning measure polarization curve that computerizeds control, opened by corrosion potential
Begin to carry out anode polarization to working electrode, crossed after Pitting Potential, when current density increases to certain value, then carried out opposite direction
Polarization, when the current density of flyback is by returning to passive state, terminate experiment.
If studying influence of the Simulated Soil Solution oxygen content to metal critical Pitting Potential, working electrode is positioned over soil
On simulated solution, by gas bottle and airway tube toward logical oxygen or nitrogen in Simulated Soil Solution, change Simulated Soil Solution
Oxygen content, Simulated Soil Solution oxygen content is measured by oxygen content tester at any time, reaches test requirements document, stops ventilation, then
Working electrode is positioned within Simulated Soil Solution, tested.
If studying influence of the temperature to metal critical Pitting Potential, working electrode is positioned on Simulated Soil Solution,
Change the temperature of Simulated Soil Solution by heater, monitor the temperature of Simulated Soil Solution at any time by temperature-sensitive module, treat temperature
Degree reaches test requirements document, stops heating and causes Simulated Soil Solution temperature to keep constant, then working electrode is positioned over soil
Within simulated solution, tested.
Claims (5)
- A kind of 1. device for determining open-circuit potential of the metal in Simulated Soil Solution, it is characterised in that including conical flask, Electrochemical workstation, saturated calomel electrode, oxygen content display, oxygen content tester, Pt electrodes, salt bridge, working electrode, heating Device and warming module；The conical flask is provided with rubber stopper, is inserted with airway tube, the wire for connecting working electrode, connection on rubber stopper successively respectively The wire of salt bridge, the wire for connecting Pt electrodes, the wire for connecting oxygen content tester；Warming mould is there is also mounted in the conical flask Block；Working electrode connects the working electrode junction of electrochemical workstation by copper conductor；Salt bridge is sweet by wire connection saturation Mercury electrode, saturated calomel electrode connect the reference electrode junction of electrochemical workstation by wire；Pt electrodes are connected by wire Connect the auxiliary electrode junction of electrochemical workstation；Oxygen content tester connects oxygen content display by wire；Airway tube is another One end connects gas bottle outside bottle by rotary switch；Computer connects electrochemical workstation；One is put under the conical flask to add Hot device.
- 2. a kind of device of open-circuit potential of the measure metal according to claim 1 in Simulated Soil Solution, its It is characterised by thering is a conduit outside the copper conductor of the working electrode connection, through rubber stopper, the conduit and copper conductor are used respectively First fastener, the second fastener are fixed.
- 3. a kind of device of open-circuit potential of the measure metal according to claim 1 in Simulated Soil Solution, its It is characterised by, the computer control electrochemical workstation carries out automatically scanning measure polarization curve.
- 4. a kind of device of open-circuit potential of the measure metal according to claim 1 in Simulated Soil Solution, its It is characterised by, the contact of the working electrode and copper conductor must apply envelope, ensure its insulating properties.
- 5. a kind of device of open-circuit potential of the measure metal according to claim 1 in Simulated Soil Solution, its It is characterised by, the gas bottle and airway tube can change Simulated Soil Solution oxygen content by adding oxygen or other gases, and The molten amount of oxygen in Simulated Soil Solution is accurately determined by oxygen content tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720375800.0U CN206862853U (en) | 2017-04-12 | 2017-04-12 | A kind of device of open-circuit potential of the measure metal in Simulated Soil Solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720375800.0U CN206862853U (en) | 2017-04-12 | 2017-04-12 | A kind of device of open-circuit potential of the measure metal in Simulated Soil Solution |
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| Publication Number | Publication Date |
|---|---|
| CN206862853U true CN206862853U (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720375800.0U Expired - Fee Related CN206862853U (en) | 2017-04-12 | 2017-04-12 | A kind of device of open-circuit potential of the measure metal in Simulated Soil Solution |
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| CN (1) | CN206862853U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514580A (en) * | 2019-09-16 | 2019-11-29 | 国网浙江平湖市供电有限公司 | The oxygen differential concentration corrosion simulator of distribution line shaft tower down conductor |
-
2017
- 2017-04-12 CN CN201720375800.0U patent/CN206862853U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514580A (en) * | 2019-09-16 | 2019-11-29 | 国网浙江平湖市供电有限公司 | The oxygen differential concentration corrosion simulator of distribution line shaft tower down conductor |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180109 |