CN113188991A - Device suitable for flow corrosion and electrochemical in-situ test - Google Patents
Device suitable for flow corrosion and electrochemical in-situ test Download PDFInfo
- Publication number
- CN113188991A CN113188991A CN202110564321.4A CN202110564321A CN113188991A CN 113188991 A CN113188991 A CN 113188991A CN 202110564321 A CN202110564321 A CN 202110564321A CN 113188991 A CN113188991 A CN 113188991A
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- seat
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- 238000005260 corrosion Methods 0.000 title claims abstract description 42
- 230000007797 corrosion Effects 0.000 title claims abstract description 42
- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 90
- 238000007789 sealing Methods 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 23
- 230000003628 erosive effect Effects 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 11
- 238000006056 electrooxidation reaction Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 8
- 239000005060 rubber Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
Abstract
The invention discloses a device suitable for flow corrosion and electrochemical in-situ test, which can carry out flow corrosion test independently and can carry out flow corrosion test and electrochemical in-situ test simultaneously. The pipe wall of the mounting pipe is provided with a first mounting channel, a second mounting channel and a third mounting channel which are communicated with the inside of the mounting pipe at intervals; a working electrode is arranged in the first installation channel, the connecting end of the working electrode is positioned outside the installation pipe, and the end surface of the installation end and the side wall of the first installation channel enclose a sample installation chamber; a reference electrode is arranged in the second mounting channel, and a counter electrode is arranged in the third mounting channel; one end of the reference electrode and one end of the counter electrode extend into the mounting tube, and the other end of the reference electrode and the other end of the counter electrode are located outside the mounting tube. Compared with an independent experiment, the state of the metal installation pipe or the metal ship body in the marine environment can be simulated more accurately, and both flowing corrosion and electrochemical corrosion exist, so that the obtained experimental data are more accurate.
Description
Technical Field
The invention belongs to the technical field of electrochemical testing devices, and particularly relates to a device suitable for flow corrosion and electrochemical in-situ testing.
Background
Compared with static corrosion, metal mounting pipes or ship materials in the sea are easily damaged on the surface due to the corrosion of seawater and the reciprocating impact of sea waves for a long time, and the service life is greatly shortened. In order to improve the corrosion resistance of the material, the corrosion performance of the material is usually tested in the new material development stage, and the corrosion mechanism is analyzed. Therefore, the quality loss and electrochemical behavior of the sample at different stages of dynamic corrosion need to be examined, and the corrosion appearance, corrosion rate and corrosion mechanism of the sample are combined to comprehensively evaluate the corrosion resistance of the material.
The dynamic corrosion of materials in marine environments mainly includes electrochemical corrosion and flow corrosion. By forming two electrodes of metal and electrolyte, a corrosion galvanic cell is formed, and the more active metal loses electrons and is oxidized, which is called electrochemical corrosion. Flow erosion refers to the flow erosion of a sample by an erosion medium.
Electrochemical corrosion and flow corrosion tests of new materials are typically performed separately in separate devices. Specifically, a sample is placed in a flowing corrosion system, and after flowing corrosion of a corrosion medium, data such as morphology, mass loss and the like of the sample are collected; and then putting the sample into an electrochemical testing system for electrochemical testing. The above experimental procedures have the disadvantage of being complicated and time consuming.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a device suitable for flow corrosion and electrochemical in-situ test, which can carry out flow corrosion test independently and can carry out flow corrosion test and electrochemical in-situ test simultaneously.
The technical scheme adopted by the invention for solving the technical problems is as follows: the device suitable for the flow corrosion and electrochemical in-situ test comprises an installation pipe, wherein one end of the installation pipe is a liquid inlet, and the other end of the installation pipe is a liquid outlet;
the pipe wall of the mounting pipe is provided with a first mounting channel, a second mounting channel and a third mounting channel at intervals in pairs, and the first mounting channel, the second mounting channel and the third mounting channel are communicated with the inside of the mounting pipe;
a working electrode is arranged in the first installation channel, one end of the working electrode is a connecting end, and the other end of the working electrode is an installation end; the connecting end is positioned outside the mounting pipe, and the end surface of the mounting end and the side wall of the first mounting channel enclose a sample mounting chamber;
a reference electrode is arranged in the second mounting channel, and a counter electrode is arranged in the third mounting channel; one end of each of the reference electrode and the counter electrode extends into the mounting tube, and the other end of each of the reference electrode and the counter electrode is located outside the mounting tube.
Further, the device also comprises a first mounting seat;
the pipe wall of the installation pipe is provided with a first through hole, and the first installation seat is positioned in the first through hole and is detachably connected with the pipe wall of the installation pipe;
the first mounting channel is disposed in the first mounting seat.
Further, the working electrode comprises a conductive rod and a conductive block;
the conductive block is positioned in the first mounting channel and is clamped with the first mounting seat; the conductive block is provided with an end face adjacent to the inside of the mounting tube, and the end face and the side wall of the first mounting channel enclose a sample mounting chamber;
the tail part of the conductive rod is connected with the conductive block; the head of the conducting rod is positioned outside the first mounting seat.
Furthermore, the first through hole is a unthreaded hole, and the first mounting seat is clamped with the pipe wall of the mounting pipe.
Furthermore, a first sealing ring is arranged between the first mounting seat and the pipe wall of the mounting pipe.
Further, the device also comprises a second mounting seat and a third mounting seat;
the pipe wall of the mounting pipe is provided with a second through hole and a third through hole at intervals;
the second mounting seat is positioned in the second through hole and is detachably connected with the pipe wall of the mounting pipe; the third mounting seat is positioned in the third through hole and is detachably connected with the pipe wall of the mounting pipe;
the second mounting channel is disposed in a second mounting socket and the third mounting channel is disposed in a third mounting socket.
Furthermore, the second mounting seat and the third mounting seat are respectively clamped with the pipe wall of the mounting pipe.
Furthermore, a second sealing ring is arranged between the second mounting seat and the pipe wall of the mounting pipe, and a third sealing ring is arranged between the third mounting seat and the pipe wall of the mounting pipe.
The adjusting device further comprises an adjusting seat, wherein the adjusting seat is arranged on the first mounting seat and is positioned outside the mounting pipe;
the conductive block is of a cylindrical structure and is coaxially arranged with the conductive rod; the diameter of the conductive block is larger than that of the conductive rod;
the first mounting channel is provided with a coaxially arranged adjusting section, and the conductive block is mounted in the adjusting section; the length of the adjusting section along the axial direction of the conducting rod is greater than that of the conducting block along the axial direction of the conducting rod;
the conducting rod penetrates through the adjusting seat and is in threaded connection with a threaded hole in the adjusting seat.
Further, a sealing layer is arranged between the conductive block and the side wall of the first mounting channel.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a device suitable for flow corrosion and electrochemical in-situ test, which can carry out flow corrosion test independently and can carry out flow corrosion test and electrochemical in-situ test simultaneously. The device has wide application range and strong universality. Compared with an independent experiment, the state of the metal installation pipe or the metal ship body in the marine environment can be simulated more accurately, and both flowing corrosion and electrochemical corrosion exist, so that the obtained experimental data are more accurate. Also has the advantages of simple structure, convenient installation, low manufacturing cost and the like.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention after the reference electrode, the working electrode and the counter electrode are all mounted;
FIG. 2 is a schematic view of the first, second and third mounting blocks of the present invention mounted on a mounting tube;
FIG. 3 is a schematic structural diagram of the mounting tube of the present invention with the liquid inlet and the liquid outlet connected to the medium conduit, respectively;
FIG. 4 is a schematic view of the structure of one embodiment of the conditioning segment of the present invention;
FIG. 5 is a schematic structural view of another embodiment of an adjustment segment of the present invention;
FIG. 6 is a schematic structural view of yet another embodiment of an adjustment segment of the present invention;
reference numerals: 1-installing a pipe; 101-a first via; 102-a second via; 103-a third via; 104-a first platform; 105-a second platform; 106-a third platform; 2-a first installation channel; 201-a conditioning section; 3-a second installation channel; 4-a third installation channel; 5-a first mounting seat; 501-a first limit boss; 6-a conductive rod; 7-a conductive block; 8-a first sealing ring; 9-a second mount; 901-a second limit boss; 10-a third mount; 1001-third limit boss; 11-a second sealing ring; 12-a third sealing ring; 13-an adjusting seat; 14-a reference electrode; 15-counter electrode; 16-sample.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in the attached drawings, the device suitable for the flow corrosion and electrochemical in-situ test comprises an installation tube 1, wherein one end of the installation tube 1 is a liquid inlet, and the other end of the installation tube 1 is a liquid outlet; the pipe wall of the installation pipe 1 is provided with a first installation channel 2, a second installation channel 3 and a third installation channel 4 at intervals in pairs, and the first installation channel 2, the second installation channel 3 and the third installation channel 4 are all communicated with the inside of the installation pipe 1; a working electrode is arranged in the first installation channel 2, one end of the working electrode is a connecting end, and the other end of the working electrode is an installation end; the connecting end is positioned outside the mounting tube 1, and the end surface of the mounting end and the side wall of the first mounting channel 2 enclose a sample mounting chamber; a reference electrode 14 is installed in the second installation channel 3, and a counter electrode 15 is installed in the third installation channel 4; one end of each of the reference electrode 14 and the counter electrode 15 extends into the installation tube 1, and the other end of each of the reference electrode 14 and the counter electrode 15 is located outside the installation tube 1.
The pipe wall of the installation pipe 1 provides installation support for a reference electrode 14, a working electrode and a counter electrode 15, the working electrode is installed in the first installation channel 2, the reference electrode 14 is installed in the second installation channel 3, and the counter electrode 15 is installed in the third installation channel 4. The sample 16 is attached to the mounting end of the working electrode and is located in the sample mounting chamber. One end of each of the reference electrode 14 and the counter electrode 15 extends into the installation tube 1, so that the reference electrode 14 and the counter electrode 15 can be completely contacted with corrosive liquid after the corrosive liquid is introduced into the installation tube 1. The other ends of the reference electrode 14 and the counter electrode 15 are both located outside the mounting tube 1.
When the length of the installation pipe 1 is short, preferably, before the test, a liquid inlet and a liquid outlet of the installation pipe 1 are respectively connected with a medium pipeline.
When only the flow corrosion test is performed, the reference electrode 14 and the counter electrode 15 are taken out, and the second installation path 3 and the third installation path 4 are plugged with a filler. The working electrode is not energized at this time and provides only a connection mounting support for the sample 16. Corrosive liquid is introduced into the installation pipe 1, flows in the installation pipe 1, and simulates the flowing erosion of seawater on the sample 16. The etching liquid is usually 3.5% sodium chloride solution, and a tungsten plate with a hard coating on the surface is selected as the sample 16.
When the flow corrosion test and the electrochemical in situ test are performed simultaneously, the reference electrode 14 is inserted into the second mounting channel 3 and the counter electrode 15 is inserted into the third mounting channel 4. The connecting end of the working electrode is electrically connected with a working electrode interface of the workstation, one end of the reference electrode 14, which is positioned outside the installation tube 1, is electrically connected with the reference electrode interface of the workstation, and one end of the counter electrode 15, which is positioned outside the installation tube 1, is electrically connected with the counter electrode interface of the workstation. Corrosive liquid is introduced into the installation tube 1, the sample 16 is contacted with the corrosive liquid, and the end part of the reference electrode 14 extending into the installation tube 1 and the end part of the counter electrode 15 extending into the installation tube 1 are both immersed in the corrosive liquid. At this time, the reference electrode 14, the working electrode and the counter electrode 15 are all electrified, and the electrochemical in-situ test is carried out while the flowing corrosion test is carried out. Compared with an independent experiment, the method can more accurately simulate the state of the metal pipeline or the metal ship body in the marine environment, and not only has flowing corrosion, but also has electrochemical corrosion, so that the obtained experimental data are more accurate.
The working electrode can be directly mounted through the wall of the mounting tube 1, and the wall should be thick enough to ensure stable mounting of the working electrode. Preferably, the device further comprises a first mounting seat 5; a first through hole 101 is formed in the pipe wall of the mounting pipe 1, and the first mounting seat 5 is located in the first through hole 101 and detachably connected with the pipe wall of the mounting pipe 1; the first mounting channel 2 is arranged in a first mounting seat 5. The first mounting base 5 is installed through the first through hole 101 in the pipe wall, and is detachably connected with the pipe wall, so that the first mounting base is convenient to detach and install. The first mounting channel 2 is disposed in the first mounting seat 5 and communicates with the inside of the mounting tube 1.
After the sample 16 is mounted, the end surface of the first mounting seat 5 located in the mounting tube 1 is arranged in the same plane with one side surface of the sample 16.
The working electrode may have a cylindrical structure and is installed in the first installation passage 2. Preferably, the working electrode comprises a conductive rod 6 and a conductive block 7; the conductive block 7 is positioned in the first mounting channel 2 and is clamped with the first mounting seat 5; the conductive block 7 is provided with an end face adjacent to the inside of the mounting tube 1, and the end face and the side wall of the first mounting channel 2 enclose a sample mounting chamber; the tail part of the conductive rod 6 is connected with a conductive block 7; the head of the conducting rod 6 is positioned outside the first mounting seat 5. The head of the conducting rod 6 is used as the connecting end of the working electrode and is electrically connected with the working electrode interface of the workstation. The end of the conductive block 7 away from the conductive rod 6 is used as a mounting end to connect the sample 16, and the sample 16 and the conductive block 7 are usually adhered by conductive adhesive. The conducting rod 6 and the conducting block 7 are connected together to form a working electrode. The current is transmitted to the sample 16 via the conductive rod 6 and the conductive block 7.
The connection of the tail part of the conductive rod 6 and the conductive block 7 has various specific embodiments:
in the first embodiment, the tail of the conductive rod 6 is welded to the conductive block 7. In the second embodiment, the tail of the conductive rod 6 is screwed with the threaded hole on the conductive block 7. In the third embodiment, the conductive rod 6 and the conductive block 7 are integrally formed.
The conductive rod 6 and the conductive block 7 may be made of aluminum, preferably copper.
The first mounting seat 5 has various structural forms, and can be a cylindrical structure, a prismatic structure and the like. If the first mounting seat 5 is a cylindrical structure, the first through hole 101 on the tube wall may be a threaded hole or a unthreaded hole. When the first through hole 101 is a threaded hole, the first mounting seat 5 of the cylindrical structure is in threaded connection with the pipe wall. When the first through hole 101 is a unthreaded hole, the first mounting seat 5 of the cylindrical structure is clamped with the pipe wall. If the first mounting seat 5 has a prism structure, the first through hole 101 on the tube wall is a light hole adapted to the first mounting seat 5 having the prism structure. The first mounting seat 5 with the prism structure is clamped with the pipe wall.
In order to prevent the corrosive liquid in the installation pipe 1 from seeping out from the joint of the first installation seat 5 and the pipe wall, the first installation seat 5 may be in interference fit with the first through hole 101, so that the first installation seat 5 is in close contact with the side wall of the first through hole 101. Preferably, a first sealing ring 8 is arranged between the first mounting seat 5 and the pipe wall of the mounting pipe 1. The first sealing ring 8 plays a role in sealing, and prevents corrosive liquid in the installation pipe 1 from seeping out from the connection part of the first installation seat 5 and the pipe wall.
The first sealing ring 8 may be disposed between the first mounting seat 5 and the sidewall of the first through hole 101, preferably, a first limiting boss 501 is disposed on the periphery of the first mounting seat 5, and the first limiting boss 501 is located outside the mounting pipe 1. At this time, the outer wall of the mounting tube 1 is provided with the first platform 104, and the first seal ring 8 is disposed between the first limit boss 501 of the first mounting seat 5 and the first platform 104. The first limit boss 501 limits the first seal ring 8, and prevents the first seal ring 8 from falling off.
The second installation channel 3 and the third installation channel 4 can also be directly arranged on the tube wall of the installation tube 1, and the tube wall should be thick enough to ensure the stable installation of the reference electrode 14 and the counter electrode 15. Preferably, the device further comprises a second mounting seat 9 and a third mounting seat 10; the pipe wall of the installation pipe 1 is provided with a second through hole 102 and a third through hole 103 at intervals; the second mounting seat 9 is positioned in the second through hole 102 and detachably connected with the pipe wall of the mounting pipe 1; the third mounting seat 10 is positioned in the third through hole 103 and is detachably connected with the pipe wall of the mounting pipe 1; the second mounting channel 3 is arranged in a second mounting seat 9 and the third mounting channel 4 is arranged in a third mounting seat 10. The reference electrode 14 is mounted through the second mounting passage 3 on the second mount 9, and the counter electrode 15 is mounted through the third mounting passage 4 on the third mount 10.
In the embodiment shown in fig. 1-3, the first through holes 101 are located between the second through holes 102 and the third through holes 103, and are arranged two by two at intervals in the circumferential direction of the installation tube 1.
The second mounting seat 9 and the third mounting seat 10 have various structural forms, and can be of a cylindrical structure, a prism structure and the like. If the second mounting seat 9 and the third mounting seat 10 are cylindrical structures, at this time, the second through hole 102 and the third through hole 103 on the tube wall may be both a threaded hole and a unthreaded hole. When the second through hole 102 and the third through hole 103 are threaded holes, the second mounting seat 9 of the cylindrical structure and the third mounting seat 10 of the cylindrical structure are respectively in threaded connection with the pipe wall. When the second through hole 102 and the third through hole 103 are unthreaded holes, the second mounting seat 9 of the cylindrical structure and the third mounting seat 10 of the cylindrical structure are respectively clamped with the pipe wall. If the second mounting seat 9 and the third mounting seat 10 are prism structures, at this time, the second through hole 102 on the tube wall is a light hole matched with the second mounting seat 9 of the prism structure, and the third through hole 103 is a light hole matched with the third mounting seat 10 of the prism structure. The second mounting seat 9 and the third mounting seat 10 are respectively clamped with the pipe wall.
In order to prevent the corrosive liquid in the installation pipe 1 from seeping out from the joint between the second installation seat 9 and the installation pipe 1 and prevent the corrosive liquid from seeping out from the joint between the third installation seat 10 and the installation pipe 1, it is preferable that a second sealing ring 11 is arranged between the second installation seat 9 and the pipe wall of the installation pipe 1, and a third sealing ring 12 is arranged between the third installation seat 10 and the pipe wall of the installation pipe 1. The second sealing ring 11 seals the joint of the second mounting seat 9 and the pipe wall, and the third sealing ring 12 seals the joint of the third mounting seat 10 and the mounting pipe 1. The corrosive liquid in the mounting pipe 1 is prevented from leaking out from the joint between the second mounting seat 9 and the mounting pipe 1 and the joint between the third mounting seat 10 and the mounting pipe 1.
The second sealing ring 11 may be disposed between the second mounting seat 9 and the sidewall of the second through hole 102, and preferably, a second limiting boss 901 is disposed on the periphery of the second mounting seat 9, and the second limiting boss 901 is located outside the mounting pipe 1. At this time, the outer wall of the mounting tube 1 is provided with the second platform 105, and the second seal ring 11 is disposed between the second limit boss 901 of the second mounting seat 9 and the second platform 105. The second limiting boss 901 limits the second sealing ring 11, and prevents the second sealing ring 11 from falling off.
The third sealing ring 12 may be disposed between the third mounting seat 10 and the sidewall of the third through hole 103, and preferably, a third limiting boss 1001 is disposed on the outer periphery of the third mounting seat 10, and the third limiting boss 1001 is located outside the mounting pipe 1. At this time, the outer wall of the mounting pipe 1 is provided with the third land 106, and the third seal ring 12 is disposed between the third stopper boss 1001 of the third mount 10 and the third land 106. The third limit boss 1001 limits the third seal ring 12, and prevents the third seal ring 12 from falling off.
In order to detect samples 16 with different thicknesses, the device preferably further comprises an adjusting seat 13, wherein the adjusting seat 13 is arranged on the first mounting seat 5 and is positioned outside the mounting tube 1; the conductive block 7 is of a cylindrical structure and is coaxially arranged with the conductive rod 6; the diameter of the conductive block 7 is larger than that of the conductive rod 6; the first mounting channel 2 is provided with a coaxially arranged adjusting section 201, and the conductive block 7 is mounted in the adjusting section 201; the length of the adjusting section 201 along the axial direction of the conducting rod 6 is greater than the length of the conducting block 7 along the axial direction of the conducting rod 6; the conducting rod 6 penetrates through the adjusting seat 13 and is in threaded connection with a threaded hole in the adjusting seat 13. The conductive rod 6 is rotated outside the installation tube 1, the conductive block 7 is driven to do linear motion along the axial direction of the conductive rod 6 through the matching of the conductive rod 6 and the adjusting seat 13, and the position of the conductive block 7 in the adjusting section 201 is adjusted to match samples 16 with different thicknesses. Meanwhile, the weight of the conductive block 7 can be supported through the matching of the conductive rod 6 and the adjusting seat 13, so that the conductive block 7 is stably installed. The adjustment seat 13 is preferably of block-like construction. It should be ensured that the conductive piece 7 is in the adjusting section 201, the axial movement of which along the conductive rod 6 is not interfered and no loosening in the radial direction occurs. In the first embodiment, the outer wall of the conductive block 7 is attached to the side wall of the adjusting section 201, so as to prevent the conductive block 7 from loosening in the radial direction. In the second embodiment, a sealing layer is disposed between the outer wall of the conductive block 7 and the side wall of the adjusting section 201, and the sealing layer not only can perform a sealing function, but also can prevent the conductive block 7 from loosening in the radial direction. The first installation channel 2 may be integrally formed as the adjustment section 201, and the adjustment section 201 may also be disposed in the middle of the first installation channel 2 or at an end of the first installation channel 2 adjacent to the inside of the installation tube 1.
Preferably, the thread direction of the threaded hole on the adjusting seat 13 is opposite to the thread direction of the threaded hole on the conductive block 7. When the conducting rod 6 is rotated, the conducting rod 6 is reliably connected with the conducting block 7, and the conducting rod 6 is prevented from rotating out of the threaded hole of the conducting block 7.
The adjusting base 13 may be bonded or welded to the first mounting base 5, or may be integrally formed with the first mounting base 5.
The first, second and third mounts 5, 9, 10 are made of a material that is inert with respect to the sample 16, such as: gold, silver, ceramic, silica gel, rubber, polytetrafluoroethylene, PP, PS, PE, PVC and the like.
The first sealing ring 8, the second sealing ring 11 and the third sealing ring 12 have various specific embodiments, and only the sealing effect needs to be ensured. Such as: the first sealing ring 8, the second sealing ring 11 and the third sealing ring 12 can be sealing adhesive products. Preferably, the first seal ring 8, the second seal ring 11 and the third seal ring 12 are all rubber rings.
Preferably, a sealing layer is arranged between the conductive block 7 and the side wall of the first mounting channel 2. The sealing layer can be a sealing glue product, a rubber sleeve, a silica gel sleeve and the like. Corrosive liquid in the installation pipe 1 is prevented from penetrating into the gap between the conductive block 7 and the side wall of the first installation channel 2. As mentioned before, the sealing layer is preferably arranged between the outer wall of the conductive block 7 and the side wall of the adjustment segment 201.
The above is a specific embodiment of the present invention, and it can be seen from the implementation process that the present invention provides a device suitable for flow corrosion and electrochemical in-situ test, which can perform a flow corrosion test alone, and can perform a flow corrosion test and an electrochemical in-situ test simultaneously. The device has wide application range and strong universality. Compared with an independent experiment, the state of the metal installation pipe or the metal ship body in the marine environment can be simulated more accurately, and both flowing corrosion and electrochemical corrosion exist, so that the obtained experimental data are more accurate. Also has the advantages of simple structure, convenient installation, low manufacturing cost and the like.
Claims (10)
1. The device suitable for flow corrosion and electrochemical in-situ test is characterized in that: the device comprises a mounting pipe (1), wherein one end of the mounting pipe (1) is a liquid inlet, and the other end of the mounting pipe is a liquid outlet;
the pipe wall of the mounting pipe (1) is provided with a first mounting channel (2), a second mounting channel (3) and a third mounting channel (4) at intervals in pairs, and the first mounting channel (2), the second mounting channel (3) and the third mounting channel (4) are communicated with the inside of the mounting pipe (1);
a working electrode is arranged in the first installation channel (2), one end of the working electrode is a connecting end, and the other end of the working electrode is an installation end; the connecting end is positioned outside the mounting tube (1), and the end surface of the mounting end and the side wall of the first mounting channel (2) enclose a sample mounting chamber;
a reference electrode (14) is arranged in the second mounting channel (3), and a counter electrode (15) is arranged in the third mounting channel (4); one end of each of the reference electrode (14) and the counter electrode (15) extends into the installation tube (1), and the other end of each of the reference electrode (14) and the counter electrode (15) is located outside the installation tube (1).
2. The apparatus adapted for flow erosion and electrochemical in situ testing of claim 1, wherein: the device also comprises a first mounting seat (5);
a first through hole (101) is formed in the pipe wall of the mounting pipe (1), and the first mounting seat (5) is positioned in the first through hole (101) and detachably connected with the pipe wall of the mounting pipe (1);
the first mounting channel (2) is arranged in a first mounting seat (5).
3. The apparatus for flow erosion and electrochemical in situ testing according to claim 2, wherein: the working electrode comprises a conductive rod (6) and a conductive block (7);
the conductive block (7) is positioned in the first mounting channel (2) and is clamped with the first mounting seat (5); the conductive block (7) is provided with an end face adjacent to the inside of the mounting tube (1), and the end face and the side wall of the first mounting channel (2) enclose a sample mounting chamber;
the tail part of the conductive rod (6) is connected with the conductive block (7); the head of the conducting rod (6) is positioned outside the first mounting seat (5).
4. The apparatus for flow erosion and electrochemical in situ testing according to claim 2, wherein: first through-hole (101) are the unthreaded hole, first mount pad (5) and the pipe wall joint of installation pipe (1).
5. The apparatus for flow erosion and electrochemical in situ testing according to claim 2, wherein: a first sealing ring (8) is arranged between the first mounting seat (5) and the pipe wall of the mounting pipe (1).
6. The apparatus adapted for flow erosion and electrochemical in situ testing of claim 1, wherein: the device also comprises a second mounting seat (9) and a third mounting seat (10);
the pipe wall of the mounting pipe (1) is provided with second through holes (102) and third through holes (103) at intervals;
the second mounting seat (9) is positioned in the second through hole (102) and is detachably connected with the pipe wall of the mounting pipe (1); the third mounting seat (10) is positioned in the third through hole (103) and is detachably connected with the pipe wall of the mounting pipe (1);
the second mounting channel (3) is arranged in a second mounting seat (9) and the third mounting channel (4) is arranged in a third mounting seat (10).
7. The apparatus adapted for flow erosion and electrochemical in situ testing of claim 6, wherein: and the second mounting seat (9) and the third mounting seat (10) are respectively clamped with the pipe wall of the mounting pipe (1).
8. The apparatus adapted for flow erosion and electrochemical in situ testing of claim 6, wherein: and a second sealing ring (11) is arranged between the second mounting seat (9) and the pipe wall of the mounting pipe (1), and a third sealing ring (12) is arranged between the third mounting seat (10) and the pipe wall of the mounting pipe (1).
9. The apparatus for flow erosion and electrochemical in situ testing according to claim 3, wherein: the device is characterized by further comprising an adjusting seat (13), wherein the adjusting seat (13) is arranged on the first mounting seat (5) and is positioned outside the mounting pipe (1);
the conductive block (7) is of a cylindrical structure and is coaxially arranged with the conductive rod (6); the diameter of the conductive block (7) is larger than that of the conductive rod (6);
the first mounting channel (2) has a coaxially arranged adjusting section (201), and the conductive block (7) is mounted in the adjusting section (201); the length of the adjusting section (201) along the axial direction of the conducting rod (6) is greater than the length of the conducting block (7) along the axial direction of the conducting rod (6);
the conducting rod (6) penetrates through the adjusting seat (13) and is in threaded connection with a threaded hole in the adjusting seat (13).
10. The apparatus for flow erosion and electrochemical in situ testing according to claim 3, wherein: and a sealing layer is arranged between the conductive block (7) and the side wall of the first mounting channel (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110564321.4A CN113188991A (en) | 2021-05-24 | 2021-05-24 | Device suitable for flow corrosion and electrochemical in-situ test |
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| CN202110564321.4A CN113188991A (en) | 2021-05-24 | 2021-05-24 | Device suitable for flow corrosion and electrochemical in-situ test |
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| CN116840138A (en) * | 2023-09-01 | 2023-10-03 | 中铁十七局集团第二工程有限公司 | Three-pipe communicating vessel type reinforcing steel bar anodic polarization test device |
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Application publication date: 20210730 |