CN112082932B - Electrolysis bath device for simulating corrosion electrochemistry measurement under heat exchange effect - Google Patents
Electrolysis bath device for simulating corrosion electrochemistry measurement under heat exchange effect Download PDFInfo
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- 230000007797 corrosion Effects 0.000 title claims abstract description 22
- 238000005260 corrosion Methods 0.000 title claims abstract description 22
- 230000000694 effects Effects 0.000 title claims description 5
- 238000005259 measurement Methods 0.000 title description 7
- 230000005518 electrochemistry Effects 0.000 title description 3
- 238000005868 electrolysis reaction Methods 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 230000007613 environmental effect Effects 0.000 claims abstract description 34
- 238000002848 electrochemical method Methods 0.000 claims abstract description 6
- 239000011810 insulating material Substances 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 abstract description 3
- 238000010998 test method Methods 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 59
- 238000000034 method Methods 0.000 description 8
- 238000005192 partition Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000006056 electrooxidation reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001453 impedance spectrum Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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Abstract
本发明公开了一种模拟热交换作用下腐蚀电化学测量的电解池装置，包括环境水槽、电解池、参比电极、第一温控装置和第二温控装置；电解池设于环境水槽内，电解池设有电极放置口，电解池的内部通过电极放置口与环境水槽内部导通，电极放置口用于密封放置待测电极，以使待测电极的一侧朝向环境水槽内、另一侧朝向电解池内；参比电极设于电解池内，参比电极与待测电极分离布置；第一温控装置与环境水槽连接，第一温控装置用于对环境水槽装载的介质进行温度调控；第二温控装置与电解池连接，第二温控装置用于对电解池装载的介质进行温度调控；所以此装置实现了热交换环境的温度模拟，切实解决了现有测试方法忽略换热管腐蚀机理的问题。
The invention discloses an electrolytic cell device for simulating corrosion electrochemical measurement under the action of heat exchange, comprising an environmental water tank, an electrolytic cell, a reference electrode, a first temperature control device and a second temperature control device; the electrolytic cell is arranged in the environmental water tank , the electrolytic cell is provided with an electrode placement port, the interior of the electrolytic cell is connected to the interior of the environmental water tank through the electrode placement port, and the electrode placement port is used to seal the electrode to be tested, so that one side of the electrode to be tested faces the environmental water tank and the other The side faces into the electrolytic cell; the reference electrode is arranged in the electrolytic cell, and the reference electrode and the electrode to be tested are arranged separately; the first temperature control device is connected with the environmental water tank, and the first temperature control device is used for the temperature control of the medium loaded in the environmental water tank; The second temperature control device is connected to the electrolytic cell, and the second temperature control device is used to control the temperature of the medium loaded in the electrolytic cell; therefore, this device realizes the temperature simulation of the heat exchange environment, and effectively solves the problem that the existing test method ignores the heat exchange tube Corrosion Mechanisms.
Description
Technical Field
The invention relates to the field of corrosion research of heat exchange tubes, in particular to an electrolytic cell device for simulating corrosion electrochemistry measurement under the action of heat exchange.
Background
The heat exchange tube is a core component of heat exchange devices such as air conditioners, condensers and the like, and has high corrosion safety requirements. During operation, because media with different temperatures on two sides of the heat exchange tube exchange heat through the heat exchange tube, the corrosion risk is large. From the corrosion influence factor, the heat exchange tube is not only subjected to electrochemical corrosion of corrosive media (such as cooling seawater) during service, but also has a heat exchange effect at a material interface, and the heat exchange process has an important influence on the electrochemical corrosion process of the heat exchange tube material, and is a non-negligible environmental factor in the research of the corrosion mechanism of the heat exchange tube.
At present, the corrosion research of the heat exchange tube mainly adopts an electrochemical test method. Conventional electrochemical corrosion measurements typically employ three-electrode system cells, but conventional cells do not achieve the corrosion measurement requirements under heat exchange conditions for corrosive electrochemical processes with heat exchange processes. The heat exchange at the interface has certain influence on the interface corrosion process, and when electrochemical measurements such as a potentiodynamic polarization curve, zero resistance current, an impedance spectrum and the like are carried out by adopting the traditional electrolytic cell device at present, because of no heat exchange environment, the measured data has larger deviation with the actual process, the corrosion mechanism and the corrosion trend of the actual heat exchange tube can not be reflected, and the larger defect exists.
Disclosure of Invention
The invention aims to provide an electrolytic cell device for corrosion electrochemical measurement under the simulated heat exchange effect, so as to solve the problem that the corrosion mechanism of a heat exchange tube is neglected in a testing method.
In order to solve the technical problem, the invention provides an electrolytic cell device for simulating corrosion electrochemical measurement under the action of heat exchange, which comprises an environmental water tank, an electrolytic cell, a reference electrode, a first temperature control device and a second temperature control device, wherein the environmental water tank is connected with the electrolytic cell through a pipeline; the electrolytic cell is arranged in the environment water tank, the electrolytic cell is provided with an electrode placing opening, the interior of the electrolytic cell is communicated with the interior of the environment water tank through the electrode placing opening, and the electrode placing opening is used for hermetically placing an electrode to be detected, so that one side of the electrode to be detected faces the interior of the environment water tank, and the other side of the electrode to be detected faces the interior of the environment water tank; the reference electrode is arranged in the electrolytic cell, and the reference electrode and the electrode to be detected are separately arranged; the first temperature control device is connected with the environment water tank and is used for regulating and controlling the temperature of the medium loaded by the environment water tank; the second temperature control device is connected with the electrolytic cell and is used for regulating and controlling the temperature of the medium loaded in the electrolytic cell.
In one embodiment, an auxiliary electrode is further arranged in the electrolytic cell, and the reference electrode is arranged between the electrode to be measured and the auxiliary electrode.
In one embodiment, the auxiliary electrode is mesh-shaped.
In one embodiment, the reference electrode is centrally disposed between the electrode to be measured and the auxiliary electrode.
In one embodiment, a slot is arranged in a cell wall of the electrolytic cell, the upper portion of the slot penetrates through the top of the electrolytic cell, the lower portion of the slot is communicated with the electrode placing port, and the slot is used for allowing the electrode to be tested to be inserted into the electrode placing port.
In one embodiment, the electrolytic cell is provided with a removable top plate that covers the opening of the receptacle in the upper part of the electrolytic cell.
In one embodiment, the electrolytic cell is made of a thermally insulating material.
In one embodiment, the insulating material is polytetrafluoroethylene.
In one embodiment, a partition board is arranged at the bottom of the environmental water tank, the electrolytic cell is arranged on the partition board, and the electrolytic cell, the partition board and the environmental water tank are connected and fixed into a whole.
The invention has the following beneficial effects:
the electrode placing opening is used for hermetically placing an electrode to be tested, so that one side of the electrode to be tested faces the environment water tank, and the other side of the electrode to be tested faces the electrolytic cell, when different media are loaded in the environment water tank and the electrolytic cell, two opposite sides of the electrode to be tested can be in contact with the different media; because the first temperature control device is used for regulating and controlling the temperature of the medium loaded by the environmental water tank and the second temperature control device is used for regulating and controlling the temperature of the medium loaded by the electrolytic cell, the device realizes the temperature simulation of the heat exchange environment and practically solves the problem that the corrosion mechanism of the heat exchange tube is neglected in the existing test method.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a structure provided by a first embodiment of an electrolytic cell unit of the present invention;
FIG. 2 is a schematic diagram of the cell configuration of FIG. 1;
FIG. 3 is a schematic view of the structure provided by a second embodiment of the electrolytic cell unit of the present invention.
The reference numbers are as follows:
10. an ambient water tank;
20. an electrolytic cell; 21. an electrode placement port; 22. a slot; 23. a top plate;
31. a reference electrode; 32. an electrode to be tested; 33. an auxiliary electrode;
41. a first temperature control device; 411. a first heating rod; 42. a second temperature control device; 421. a second heating rod;
50. daub;
61. a partition plate; 62. a bolt; 63. and a nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The invention provides an electrolytic cell device for simulating corrosion electrochemical measurement under the action of heat exchange, wherein a first embodiment of the electrolytic cell device is shown in figures 1 and 2 and comprises an environmental water tank 10, an electrolytic cell 20, a reference electrode 31, a first temperature control device 41 and a second temperature control device 42; the electrolytic cell 20 is arranged in the environmental water tank 10, the electrolytic cell 20 is provided with an electrode placing opening 21, the interior of the electrolytic cell 20 is communicated with the interior of the environmental water tank 10 through the electrode placing opening 21, and the electrode placing opening 21 is used for hermetically placing an electrode 32 to be detected, so that one side of the electrode 32 to be detected faces the interior of the environmental water tank 10, and the other side of the electrode 32 to be detected faces the interior of the electrolytic cell 20; the reference electrode 31 is arranged in the electrolytic cell 20, and the reference electrode 31 is arranged separately from the electrode to be measured 32; the first temperature control device 41 is connected with the environmental water tank 10, and the first temperature control device 41 is used for regulating and controlling the temperature of the medium loaded in the environmental water tank 10; the second temperature control device 42 is connected with the electrolytic cell 20, and the second temperature control device 42 is used for temperature regulation and control of the medium loaded in the electrolytic cell 20.
When in application, the electrode 32 to be tested is firstly installed in the electrode placing opening 21, and then the gap between the electrode 32 to be tested and the electrode placing opening 21 is filled with the daub 50 for sealing so as to block the conduction between the interior of the environmental water tank 10 and the interior of the electrolytic cell 20, wherein the working area of the electrode 32 to be tested is calculated according to the actual working area after the sealing daub 50 is coated; after the electrode 32 to be measured is installed, adding a first medium (such as hot water) into the environmental water tank 10, and starting the first temperature control device 41 to regulate and control the temperature of the first medium, so that the temperature of the first medium in the environmental water tank 10 is kept constant; similarly, a second medium (e.g. cold water) is added into the electrolytic cell 20, the electrode to be tested 32 and the reference electrode 31 can operate for testing, and at this time, the second temperature control device 42 can regulate and control the temperature of the second medium to ensure that the temperature difference between the two sides of the electrode to be tested 32 is kept constant, so that the device realizes temperature simulation of a heat exchange environment and practically solves the problem that the existing testing method neglects a corrosion mechanism of a heat exchange tube.
The first temperature control device 41 is arranged at the bottom of the environmental water tank 10 and penetrates into the environmental water tank 10 through the first heating rod 411, so that the medium in the environmental water tank 10 is heated; similarly, the second temperature control device 42 is disposed at the bottom of the ambient water tank 10 and penetrates into the interior of the electrolytic cell 20 through the second heating rod 421, so as to heat the medium in the interior of the electrolytic cell 20.
As shown in fig. 1 and fig. 2, the cell wall of the electrolytic cell 20 of this embodiment is provided with an insertion slot 22, the upper portion of the insertion slot 22 penetrates the top of the electrolytic cell 20, the lower portion of the insertion slot 22 is communicated with the electrode placing port 21, and the insertion slot 22 is used for inserting the electrode 32 to be tested into the electrode placing port 21.
Wherein, this embodiment's electrolytic cell 20 is equipped with roof 23 that can dismantle, and roof 23 closing cap slot 22 is at the opening on electrolytic cell 20 upper portion, so after assembly roof 23, roof 23 can protect slot 22, avoids slot 22 to produce the seepage phenomenon, provides the guarantee for the steady operation of electrode 32 that awaits measuring, and the back is dismantled at roof 23 in addition, also is convenient for add the medium in electrolytic cell 20, has brought the facility for the detection operation.
As shown in fig. 1, a partition 61 is disposed at the bottom of the environmental water tank 10, the electrolytic cell 20 is disposed on the partition 61, and the electrolytic cell 20, the partition 61 and the environmental water tank 10 are integrally connected, so as to prevent the accuracy of the experimental measurement data from being affected by the shaking of the electrolytic cell 20 during the experiment; the fixing manner of the electrolytic cell 20 is various, and may be fastening, bonding or welding, and in this embodiment, the bolts 62 and the nuts 63 are arranged at the four corners of the electrolytic cell 20 for installation and matching, so that the installation is convenient and fast, and the fastening performance after installation can also meet the use requirement.
In this embodiment, it is more preferable to configure the electrolytic cell 20 to be made of a heat insulating material, for example, the heat insulating material is polytetrafluoroethylene, so as to avoid interference of heat transfer on the side wall of the electrolytic cell 20, and provide important help for improving the inspection accuracy.
A second embodiment of the cell arrangement is shown in figure 3 and corresponds substantially to the first embodiment of the cell arrangement, except that an auxiliary electrode 33 is also provided in the cell 20, and that a reference electrode 31 is placed between the electrode to be measured 32 and the auxiliary electrode 33.
Namely, the reference electrode 31, the auxiliary electrode 33 and the electrode to be measured 32 form a three-electrode test system, and compared with a two-electrode system, the three-electrode test system can measure current and potential, and simultaneously ensure the accuracy of measurement, namely further improve the service performance of the electrolysis device.
In this embodiment, it is also preferable to set the auxiliary electrode 33 to be a mesh, for example, the auxiliary electrode 33 is a mesh platinum wire electrode, which has a slightly larger area than the electrode to be tested 32 and is placed at the position facing the electrode to be tested 32, so as to ensure that the current between the electrode to be tested 32 and the auxiliary electrode 33 is uniformly distributed during the test, and the mesh form is adopted to reduce the influence of the auxiliary electrode 33 on the temperature field inside the test electrolytic cell 20.
In addition, in this embodiment, it is preferable to dispose the reference electrode 31 centrally between the electrode to be measured 32 and the auxiliary electrode 33, and to maintain a separated state from the electrode to be measured 32 and the auxiliary electrode 33, so as to improve the detection accuracy.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010975517.8A CN112082932B (en) | 2020-09-16 | 2020-09-16 | Electrolysis bath device for simulating corrosion electrochemistry measurement under heat exchange effect |
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| CN202010975517.8A CN112082932B (en) | 2020-09-16 | 2020-09-16 | Electrolysis bath device for simulating corrosion electrochemistry measurement under heat exchange effect |
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| CN112082932B true CN112082932B (en) | 2021-11-19 |
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