CN106525708A - Chanel type dynamic medium electrochemical test apparatus and method - Google Patents
Chanel type dynamic medium electrochemical test apparatus and method Download PDFInfo
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- CN106525708A CN106525708A CN201611114599.7A CN201611114599A CN106525708A CN 106525708 A CN106525708 A CN 106525708A CN 201611114599 A CN201611114599 A CN 201611114599A CN 106525708 A CN106525708 A CN 106525708A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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Abstract
The invention provides a channel type dynamic medium electrochemical test apparatus. The main body of the apparatus is a closed channel, and is formed by a cover plate and a channel, and three electrodes are arranged to realize electrochemical test. The apparatus can implement the electrochemical test under a corrosion medium dynamic condition, the closed channel enlarges the adjustable range of a flow velocity, the working surface of each of the three electrodes and the channel are in the same horizontal plane, the flow state of the medium is stable, and obtained test result facilitates analysis of the flow corrosion mechanism.
Description
Technical field
The invention belongs to electrochemical corrosion field of measuring technique, is related to a kind of dynamic media electrochemical testing device and side
The electrochemical testing device of coating Dynamic Corrosion and method in method, more particularly to a kind of metal and metal.
Background technology
Erosion corrosion (i.e. Dynamic Corrosion) is the metal that metal surface is caused due to high speed relative motion with corrosive fluids
Phenomenon is damaged, is the result that material is washed away and corroded coordinative role.Compared with static corrosion, erosion corrosion is to metal material
Damage it is more rapid and serious；In ocean engineering, erosion corrosion is of common occurrence, the pipeline that caused due to erosion corrosion, appearance
The device damages such as device, heat exchanger, failure, increased production and maintenance cost, cause serious accident when serious.
Carry out numerous studies for erosion corrosion, wherein most common is weight-loss method, using simulation flow loop simulating apparatus,
Water pump promotes water body to wash away the metal surface of pipeline, and advantage is pipe design, water volume flow rate, the simulation of water body composition and reality
Unanimously.Shortcoming is the absence of monitoring or measurement for corrosion process such as polarization curve and impedance spectrum.
Rotating disk method and rotatingcylinder can carry out electrochemical measurement to the working electrode of scour process, but rotate
Status of processes washed away with pipeline, and the state of ship's navigation differ larger, it is difficult to the actual scouring state of reflection.
Jiang Shengli etc. exists《Pipe flow type inner wall erosion corrosion test device》(number of patent application 201310248151.4) intermediary
Continued a kind of pipe flow type inner wall erosion corrosion test device, lower pipe surface tangential force structure stream different in flow rate in simulation pipe flow
Type, real-time measurement of weightless measurement and electrochemical parameter of material etc..Wan Beibei etc. exists《A kind of electrochemistry of metal Dynamic Corrosion
Experimental apparatus for testing》A kind of electro-chemical test reality of metal Dynamic Corrosion is described in (number of patent application 201610034098.1)
Experiment device, is designed using gutter channel, carries out the electro-chemical test of Dynamic Corrosion.
Above research method and design have a certain degree of research to the process of erosion corrosion, but as electrochemistry is surveyed
Design and installation in examination to three electrodes, and the aspect such as the control of flow velocity and fluidised form has strict demand, related research work
It is constantly in during constantly improving.
The content of the invention
Ship's navigation cannot be reacted for existing static corrosion and circumgyration and pipe flushing corrodes actual condition
Problem, the invention provides a kind of flow channel type dynamic media electrochemical testing device, realizes simulation ship's navigation and pipeline punching
The dynamic media electro-chemical test of brush corrosion.
For solving above-mentioned technical problem, the present invention provides a kind of flow channel type dynamic media electrochemical testing device, its main body
For closed runner, be made up of cover plate and runner two parts, electro-chemical test is realized by arranging three electrodes.
Wherein, the electrochemical testing device also includes pressing plate, sample working electrode, reference electrode, impressed current anode, runner
Outlet, runner water inlet, seal groove.
Wherein, the sample working electrode includes that working electrode body, working electrode wire and working electrode touch mouth.
Wherein, shown reference electrode includes reference electrode lead and reference electrode body.
Wherein, the runner and cover plate are processed by PVC material.
Wherein, the runner is located at lower section, and bottom offers reference electrode through hole, for installing fixed reference electrode, stream
Road bottom opens up impressed current anode groove along current direction, for installing impressed current anode.
Wherein, it is cover plate above runner, is provided with through hole on cover plate, for installing sample working electrode, runner and cover plate
The corresponding position in edge respectively opens up row's screw hole, for stationary flowpath and cover plate.
Wherein, between runner and cover plate, contact surface opens up seal groove, installs rubber seal rings for seal, prevents medium from letting out
Leakage.
Wherein, the also external electrochemical workstation of described device, medium circulation system, temperature control system, water flow test instrument.
The present invention also provides the method for carrying out dynamic media electro-chemical test using above-mentioned test device, specially：
In experiment, corrosive medium flows through working electrode face, reference electrode and impressed current anode by guiding is imported and exported, by adjusting
The pressure and rate-of flow of blood circulation can change the flow rate of medium in runner, realize the polarization of lower sample different in flow rate
The electrochemical measurement such as curve and AC impedance.
Beneficial technique effect
(1) the flow channel type dynamic media electrochemical testing device that the present invention is provided, can be to the gold in dynamic corrosion test
Category or coating sample carry out electrochemical measurement；
(2) in device of the invention, the setting of three electrodes easily can be connected with electrochemical workstation；
(3) in device of the invention, reference electrode is fixed by pressing plate, and working electrode and impressed current anode pass through Wear Characteristics of Epoxy Adhesive
Knot is fixed and seals, and passes through seal with elastometic washer, it is ensured that runner ne-leakage between reference electrode and runner, between runner and cover plate；
(4) in device of the invention, the setting of three electrodes can ensure that the unimpeded of runner, and the setting of relief area can be with
The stability of corrosive medium fluidised form is improved, so as to improve measuring stability；
(5) in device of the invention, blood circulation and flow velocity tester can adjust the flow velocity of corrosive liquid and flow velocity is carried out
Measurement, closed runner design cause in runner flow velocity to be directly proportional change with flow, improve flow rate regulation efficiency and precision, from
And improve testing efficiency and accuracy；
(6) temperature control system in device of the invention with the temperature of corrosive medium during monitoring and test, and can pass through to add
Heat or refrigeration system carry out temperature adjustment, keep the constant of test process medium temperature parameter, to ensure the accurate of test result
Degree.
Description of the drawings
Fig. 1 dynamic media electrochemical testing device A-A profiles；
Fig. 2 dynamic media electrochemical testing device B-B profiles；
Fig. 3 dynamic media Electrochemical results.
Reference：1- flow path bodies；2- cover plates；3- working electrode leads；4- working electrode bodies；5- working electrodes are touched
Mouthful；6- impressed current anodes；7- runner outlets；8- reference electrode bodies；9- reference electrode leads；10- pressing plates；11- water inlets；
12- seal grooves.
Specific embodiment
The present invention provides a kind of flow channel type dynamic media electrochemical testing device, and its main body is closed runner, by cover plate
Constitute with runner two parts.
The electrochemical testing device also includes pressing plate, sample working electrode, reference electrode, impressed current anode, runner water outlet
Mouth, runner water inlet, seal groove.
The sample working electrode includes that working electrode body, working electrode wire and working electrode touch mouth.
Shown reference electrode includes reference electrode lead and reference electrode body.
The runner and cover plate are processed by PVC material.
The runner is located at lower section, and bottom offers reference electrode through hole, for installing fixed reference electrode, runner bottom
Impressed current anode groove is opened up along current direction, for installing impressed current anode.
It is cover plate above runner, is provided with through hole on cover plate, for installing sample working electrode, runner and side edge thereof phase
Corresponding position respectively opens up row's screw hole, for stationary flowpath and cover plate.
Between runner and cover plate, contact surface opens up seal groove, installs rubber seal rings for seal, prevents dielectric leakage.
The also external electrochemical workstation of described device, medium circulation system, temperature control system, water flow test instrument.
In the runner back reference electrode riding position pressing plate, for fixing reference electrode, aperture use on pressing plate, is opened up
In reference electrode is connected with external tapping.
The sample working electrode adopts metal sample or metal surface applying coating sample, and sample working electrode is welded
It is placed in after wire in the through hole of cover plate, sample, the external electrochemical workstation of wire is fixed by epoxy resin.
The impressed current anode makes " ┓ " shape, and horizontal component is installed in the groove of runner bottom, and vertical portion passes through
Outlet through runner bottom can external work station, outlet sealing is cohered using epoxy resin.
Runner water inlet distance test area arranges relief area, and working electrode work surface is in same level with cover plate plane
Interior, reference electrode is in same level with runner bottom with the work surface of impressed current anode, reduces current disorder degree with this,
Improve the stability of current.
The composition of the medium circulation system scalable corrosive liquid of matched with devices, flow velocity, temperature control system adjust the temperature of corrosive liquid
Degree, current tachymeter monitor the flow velocity of corrosive liquid.
In experiment, corrosive medium flows through working electrode face, reference electrode and impressed current anode by guiding is imported and exported, by adjusting
The pressure and rate-of flow of blood circulation can change the flow rate of medium in runner, realize the polarization of lower sample different in flow rate
The electrochemical measurement such as curve and AC impedance.In the experimental provision of the present invention, working electrode is installed in upper cover plate, by mark
Standardization is designed, and is conducive to the control and calculating of electrode reaction area, realizes that sample batches prepare, easy for installation, improves test effect
Rate.The access way of three electrodes and relief area are provided with beneficial to keeping medium fluid stable in runner so that test result
It is more reliable and more stable, be conducive to corrosion mechanism of the more preferable analysis of material in Dynamic Corrosion environment.
Below using embodiment and accompanying drawing describing embodiments of the present invention in detail, how skill is applied to the present invention whereby
Art means solving technical problem, and reach technique effect realize that process can fully understand and implement according to this.
As depicted in figs. 1 and 2, the flow channel type dynamic media electrochemical testing device that the present invention is provided, its main body are closed
Formula runner, is made up of cover plate 2 and 1 two parts of runner, and the runner 1 is located at lower section, and bottom offers reference electrode through hole, is used for
Fixed reference electrode body 8 is installed, runner bottom opens up impressed current anode groove along current direction, for installing impressed current anode 6, institute
State reference electrode body 8 to be fixed by pressing plate 10, open up aperture on pressing plate 10 and reference electrode lead 9 is connected with external tapping.
It is cover plate 2 above runner 1, is provided with through hole on cover plate, for installing sample working electrode 4, runner and cover plate side
The corresponding position of edge respectively opens up row's screw hole, for stationary flowpath and cover plate.The sample working electrode body 4 is using gold
Category sample or metal surface applying coating sample, will be placed in the through hole of cover plate after 4 welding lead of sample working electrode body, lead to
Cross epoxy resin and fix sample, 3 external electrochemical workstation of working electrode wire.
The impressed current anode 6 makes " ┓ " shape, and horizontal component is installed in the groove of runner bottom, and vertical portion passes through
Outlet through runner bottom can external electrochemical workstation, outlet sealing is cohered using epoxy resin.
Between runner 1 and cover plate 2, contact surface opens up seal groove 12, installs rubber seal rings for seal, prevents dielectric leakage.
Test device also includes runner outlet 7, runner water inlet 11, in experiment connects the external interface of three electrodes respectively
Electrochemical workstation is connect, electrochemical workstation, circulation and temperature control system is opened, can be carried out under the conditions of dynamic media
Electrochemical test, observes the experimental results such as the Dynamic Corrosion electrochemical tests and AC impedance of sample by computer.It is real
Test process as follows：Corrosive liquid flows into inlet by blood circulation, then by reference electrode 8, working electrode 7 and impressed current anode 6, leads to
Cross liquid outlet subsequent cycle is entered into blood circulation.
In the device of the present invention, blood circulation and flow velocity tester can adjust the flow velocity of corrosive liquid and flow velocity is surveyed
Amount, the flow velocity for obtaining setting carry out electrochemical measurement.The following is carbon steel material to survey under 0m/s, 5m/s and 10m/s flow velocity respectively
The polarization curve for obtaining, as shown in Figure 3.As a result show, the device of the present invention can enter row metal or coating dynamic media electrochemistry
Test, flow channel type are washed away and more conform to the actual operating mode of ship's navigation or pipeline, and apparatus structure is simple, stable working state, behaviour
Facilitate, convenient, stable laboratory facilities are provided for studying the corrosion mechanism of metal or coating sample under dynamic media.
All above-mentioned this intellectual properties of primarily enforcement, setting limit this new product of enforcement of other forms
And/or new method.Those skilled in the art will be using this important information, and the above modification, to realize similar execution feelings
Condition.But, all modifications or transformation belong to the right of reservation based on new product of the present invention.
The above, is only presently preferred embodiments of the present invention, is not the restriction for making other forms to the present invention, is appointed
What those skilled in the art possibly also with the disclosure above technology contents changed or be modified as equivalent variations etc.
Effect embodiment.But it is every without departing from technical solution of the present invention content, according to the technical spirit of the present invention to above example institute
Any simple modification, equivalent variations and the remodeling made, still falls within the protection domain of technical solution of the present invention.
Claims (10)
1. a kind of flow channel type dynamic media electrochemical testing device, it is characterised in that：Main body is closed runner, by cover plate and stream
Road two parts are constituted, and realize electro-chemical test by arranging three electrodes.
2. electrochemical testing device as claimed in claim 1, it is characterised in that：Also include pressing plate, sample working electrode, reference
Electrode, impressed current anode, runner outlet, runner water inlet, seal groove.
3. electrochemical testing device as claimed in claim 1 or 2, it is characterised in that：The sample working electrode includes work
Electrode body, working electrode wire and working electrode touch mouth.
4. the electrochemical testing device as described in claims 1 to 3, it is characterised in that：Shown reference electrode includes reference electrode
Lead and reference electrode body.
5. the electrochemical testing device as described in Claims 1-4, it is characterised in that：The runner and cover plate are added by PVC material
Work is formed.
6. the electrochemical testing device as described in claim 1 to 5, it is characterised in that：The runner is located at lower section, and bottom opens up
There is reference electrode through hole, for installing fixed reference electrode, runner bottom opens up impressed current anode groove along current direction, for pacifying
Dress impressed current anode.
7. the electrochemical testing device as described in claim 1 to 6, it is characterised in that：It is cover plate above runner, arranges on cover plate
There is through hole, for installing sample working electrode, the runner position corresponding with side edge thereof respectively opens up row's screw hole, for solid
Constant current road and cover plate.
8. the electrochemical testing device as described in claim 1 to 7, it is characterised in that：Between runner and cover plate, contact surface is opened
If seal groove, rubber seal rings for seal is installed, dielectric leakage is prevented.
9. the electrochemical testing device as described in claim 1 to 8, it is characterised in that：The also external electrochemical operation of described device
Stand, medium circulation system, temperature control system, water flow test instrument.
10. the method that test device described in claim 1 to 9 carries out dynamic media electro-chemical test, it is characterised in that：
In experiment, corrosive medium flows through working electrode face, reference electrode and impressed current anode by guiding is imported and exported, by adjusting circulation
The pressure and rate-of flow of system can change the flow rate of medium in runner, realize the polarization curve of lower sample different in flow rate
With the electrochemical measurement such as AC impedance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611114599.7A CN106525708A (en) | 2016-12-06 | 2016-12-06 | Chanel type dynamic medium electrochemical test apparatus and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611114599.7A CN106525708A (en) | 2016-12-06 | 2016-12-06 | Chanel type dynamic medium electrochemical test apparatus and method |
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| Publication Number | Publication Date |
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| CN106525708A true CN106525708A (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611114599.7A Pending CN106525708A (en) | 2016-12-06 | 2016-12-06 | Chanel type dynamic medium electrochemical test apparatus and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444236A (en) * | 2018-10-29 | 2019-03-08 | 中国船舶重工集团公司第七二五研究所 | A kind of pipeline erosion corrosion and electrochemical testing device |
| CN111257213A (en) * | 2020-02-14 | 2020-06-09 | 大连科迈尔防腐科技有限公司 | Device and method for in-situ monitoring of underwater anticorrosive coating of marine structure |
| CN113109244A (en) * | 2021-05-08 | 2021-07-13 | 中国船舶重工集团公司第七二五研究所 | Electrochemical testing device for crevice corrosion under medium flowing state |
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| CN201594066U (en) * | 2009-12-21 | 2010-09-29 | 钢铁研究总院青岛海洋腐蚀研究所 | Simulated petrochemical pipeline erosion-corrosion monitoring test device |
| CN105547989A (en) * | 2016-01-19 | 2016-05-04 | 南昌航空大学 | Electrochemical testing experimental device for dynamic corrosion of metal |
| CN205333566U (en) * | 2016-01-08 | 2016-06-22 | 中国石油大学(华东) | Pipeline normal position electrochemistry testing experiment device |
| CN205483964U (en) * | 2016-04-07 | 2016-08-17 | 青岛科技大学 | Duct flow formula developments galvanic corrosion test fixture device |
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- 2016-12-06 CN CN201611114599.7A patent/CN106525708A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201594066U (en) * | 2009-12-21 | 2010-09-29 | 钢铁研究总院青岛海洋腐蚀研究所 | Simulated petrochemical pipeline erosion-corrosion monitoring test device |
| CN205333566U (en) * | 2016-01-08 | 2016-06-22 | 中国石油大学(华东) | Pipeline normal position electrochemistry testing experiment device |
| CN105547989A (en) * | 2016-01-19 | 2016-05-04 | 南昌航空大学 | Electrochemical testing experimental device for dynamic corrosion of metal |
| CN205483964U (en) * | 2016-04-07 | 2016-08-17 | 青岛科技大学 | Duct flow formula developments galvanic corrosion test fixture device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444236A (en) * | 2018-10-29 | 2019-03-08 | 中国船舶重工集团公司第七二五研究所 | A kind of pipeline erosion corrosion and electrochemical testing device |
| CN109444236B (en) * | 2018-10-29 | 2020-11-27 | 中国船舶重工集团公司第七二五研究所 | Pipeline erosion corrosion and electrochemistry testing arrangement |
| CN111257213A (en) * | 2020-02-14 | 2020-06-09 | 大连科迈尔防腐科技有限公司 | Device and method for in-situ monitoring of underwater anticorrosive coating of marine structure |
| CN111257213B (en) * | 2020-02-14 | 2023-05-23 | 大连科迈尔防腐科技有限公司 | Device and method for in-situ monitoring of underwater anti-corrosion coating of marine structure |
| CN113109244A (en) * | 2021-05-08 | 2021-07-13 | 中国船舶重工集团公司第七二五研究所 | Electrochemical testing device for crevice corrosion under medium flowing state |
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