CN206330874U - A kind of electrochemical testing device of acoustic emission detection material corrosion performance - Google Patents

A kind of electrochemical testing device of acoustic emission detection material corrosion performance Download PDF

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Publication number
CN206330874U
CN206330874U CN201621393338.9U CN201621393338U CN206330874U CN 206330874 U CN206330874 U CN 206330874U CN 201621393338 U CN201621393338 U CN 201621393338U CN 206330874 U CN206330874 U CN 206330874U
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China
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screw thread
level sleeve
reaction tank
acoustic emission
level
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CN201621393338.9U
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徐连勇
张志强
韩永典
荆洪阳
赵雷
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Tianjin University
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Tianjin University
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Abstract

The utility model discloses a kind of electrochemical testing device of acoustic emission detection material corrosion performance, the device includes electrolytic cell, electrochemical testing device, heater and attemperator, electrolytic cell includes reaction tank, reaction tank lid, gasket seal, fastener, sample erecting device, sample erecting device is by ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring and acoustic emission sensor composition, electrochemical testing device includes auxiliary electrode chuck, reference electrode chuck, working electrode chuck, electrochemical data processing system, auxiliary electrode is gauze platinum electrode, reference electrode is arranged in Luggin capillary, heater is arranged on the outside of reaction tank, attemperator is arranged on the outside of heater.The utility model integrates sound emission Dynamic Non-Destruction Measurement technology and Electrochemical Measurement Technology, realizes online, dynamic, real-time detection material electrochemical corrosion process.

Description

A kind of electrochemical testing device of acoustic emission detection material corrosion performance
Technical field
The utility model is related to material corrosion performance test device field, and in particular to a kind of acoustic emission detection material corrosion The electrochemical testing device of performance.
Background technology
Corrosion is a kind of slow damage process that material occurs in harsh Service Environment, with extremely strong disguise, occasionally The features such as right property, sudden and serious destructiveness.Electrochemistry is a kind of conventional Fast Evaluation material corrosion resistance Method of testing, such as potentiodynamic polarization, constant potential polarization, circulation potentiodynamic polarization, electrochemical impedance test.Electrochemical techniques master Will for small sample destructive detection, it is therefore intended that prior prediction corrosion proof to material or after-action review, but can not to Use as a servant large-scale component corrosion condition and carry out on-line checking.Acoustic emission is a kind of highly sensitive online Dynamic Non-Destruction Measurement.With It is typical acoustic emission source to corrode related passivating film cracking, bubbles burst, stress corrosion cracking etc..Current acoustic emission is It is successfully applied to the fields such as remote conveying oil-piping leak detection, Corrosion of Tanks degree online evaluation.But during corrosion damage The application study of sound emission mechanism harmony transmitting qualitative assessment extent of corrosion is still within the starting stage.Sound is used while existing Lift-off technology and electrochemical techniques detect that the major defect of the test device of material corrosion performance is：(1) traditional test device It is required that tested sample size it is too big, it is impossible to carry out the test of tiny sample.While tested sample is contacted with corrosive medium also It is required that there is enough areas to be connected with waveguide rod or directly with acoustic emission sensor, this requires that the size of tested sample must be set That counts is sufficiently large.Welding point is typically the link of structural member weakness the most, if it is desired to the different zones (weldering of Welded Joints Stitch root, capping, Weld pipe mill, high temperature and low temperature heat affecting etc.) carry out sound emission and Electrochemical Detection, the limit based on sampling System, existing test device can not be realized；(2) for the ease of the installation of acoustic emission sensor, tested sample is used as work Electrode is usually required to be mounted at the bottom of electrolytic cell, therefore existing test device limits heating and the guarantor to corrosive medium Temperature；(3) acoustic emission detection and Electrochemical Detection of material corrosion performance under various mixed gases environment can not be simulated；(4) sample The complex operation of installation and removal.
The content of the invention
The purpose of this utility model be overcome the deficiencies in the prior art there is provided it is a kind of for electrochemical corrosion test sample Product fixture；
The purpose of this utility model, which is also resided in, provides a kind of fixture of acoustic emission detection material corrosion performance；
Another purpose of the present utility model also resides in a kind of corrosion electrochemical test system of offer；
Another purpose of the present utility model also resides in the electrochemistry survey for providing a kind of acoustic emission detection material corrosion performance Trial assembly is put.
The sample clamp tested for electrochemical corrosion, by ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level Sleeve and sealing ring composition, ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level sleeve and sealing ring are coaxially disposed, its In：Ladder screw thread waveguide rod is provided with the first external screw thread, the second external screw thread, and the first external screw thread is connected with the internal thread of one-level sleeve, So that the front end of ladder screw thread waveguide rod is placed in the first cavity and the second cavity of one-level sleeve, the second external screw thread is placed in one-level On the outside of second cavity of sleeve；In the rear end of ladder screw thread waveguide rod, fixing end is set；One-level sleeve external screw thread and three-level sleeve Internal thread is connected, so that one-level sleeve is placed in the 3rd cavity and the 4th cavity of three-level sleeve；Two-level sleeve is sleeved on three-level On the outside of sleeve, sealing ring is set between two-level sleeve and three-level sleeve.
In the above-mentioned technical solutions, the sealing ring is rubber seal.
In the above-mentioned technical solutions, a diameter of 5 ± 0.01mm of the test surfaces of sample, length is 7~8mm.
In the above-mentioned technical solutions, ladder screw thread waveguide rod is metal material, such as ferritic stainless steel.
In the above-mentioned technical solutions, one-level sleeve, two-level sleeve, three-level sleeve are insulating materials, such as polytetrafluoroethyl-ne Alkene.
The internal thread connection in use, the second external screw thread of ladder screw thread waveguide rod and sample is being carried out, in the circumference of sample Face sets coupling oxidant layer, the fixing end of ladder screw thread waveguide rod is rotated, so as to be connected with ladder screw thread the second external screw thread of waveguide rod Sample test surfaces, the second alignment surface of the first alignment surface, three-level sleeve with one-level sleeve is concordant；Utilize second sleeve Internal thread is fixedly linked with test device, and carries out electrochemical corrosion test to sample, using sample as working electrode, utilizes wire It is connected with the ladder screw thread waveguide rod on the outside of test device, to gather the electrochemical corrosion signal on sample.
The fixture of acoustic emission detection material corrosion performance, by ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level Sleeve, sealing ring and acoustic emission sensor composition, ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level sleeve, sealing Circle and acoustic emission sensor are coaxially disposed, wherein：Ladder screw thread waveguide rod is provided with outside the first external screw thread, the second external screw thread, first Screw thread is connected with the internal thread of one-level sleeve, so that the front end of ladder screw thread waveguide rod is placed in the first cavity and of one-level sleeve In two cavitys, the second external screw thread is placed on the outside of the second cavity of one-level sleeve；Set and fix in the rear end of ladder screw thread waveguide rod End, sets the acoustic emission sensor being in contact with it in fixing end；One-level sleeve external screw thread is connected with three-level internal thread of sleeve, with One-level sleeve is set to be placed in the 3rd cavity and the 4th cavity of three-level sleeve；Two-level sleeve is sleeved on the outside of three-level sleeve, two Sealing ring is set between level sleeve and three-level sleeve.
In the above-mentioned technical solutions, the sealing ring is rubber seal.
In the above-mentioned technical solutions, a diameter of 5 ± 0.01mm of the test surfaces of sample, length is 7~8mm.
In the above-mentioned technical solutions, ladder screw thread waveguide rod and fixing end are metal material, such as ferritic stainless steel.
In the above-mentioned technical solutions, one-level sleeve, two-level sleeve, three-level sleeve are insulating materials, such as polytetrafluoroethyl-ne Alkene.
In the above-mentioned technical solutions, adhesive phase is set between fixing end and acoustic emission sensor.
In the above-mentioned technical solutions, acoustic emission sensor is fixed in fixing end using magnetic clamp.
The internal thread connection in use, the second external screw thread of ladder screw thread waveguide rod and sample is carried out, in the periphery of sample Coupling oxidant layer is set, the fixing end of ladder screw thread waveguide rod is rotated, so as to be connected with ladder screw thread the second external screw thread of waveguide rod The test surfaces of sample, the second alignment surface of the first alignment surface, three-level sleeve with one-level sleeve is concordant；Using in second sleeve Screw thread is fixedly linked with test device, and to sample carry out electrochemical corrosion test, using sample as working electrode, using wire with Ladder screw thread waveguide rod on the outside of test device is connected, to gather the electrochemical corrosion signal on sample；Sample is in corrosion During the sound emission elastic wave that sends acoustic emission sensor is reached by ladder screw thread waveguide rod and displacement signal is converted into Electric signal, outwards transmission.
A kind of corrosion electrochemical test system, including electrolytic cell, electrochemical testing device, heater and attemperator；
The electrolytic cell includes reaction tank, reaction tank lid, gasket seal, fastener, sample erecting device, the reaction Pond is cylinder, and reaction tank upper end-face edge is provided with the top of flange, the reaction tank lid and reaction tank and is lined with gasket seal, reacts Chi Gai and reaction tank lead to fastener sealing；Reaction tank covers setting air inlet pipe thread hole, exhaust pipe thread hole, auxiliary electrode spiral shell Pit, digital display thermometer probe screwed hole, Luggin capillary screwed hole；Air inlet pipe thread hole is connected with air inlet pipe, blast pipe spiral shell Pit is connected with blast pipe, and auxiliary electrode screwed hole is connected with described auxiliary electrode, digital display thermometer probe screwed hole and number Aobvious thermometer connection；Luggin capillary screwed hole is connected with the external screw thread of Luggin capillary liquid injection port, so that Luggin capillary Crooked position is in reaction tank, just to the sample as working electrode at its opening, the internal thread of Luggin capillary liquid injection port with Reference electrode external screw thread is connected, so that reference liquid can be flow at the opening of sample in reference electrode；Luggin capillary It is located at opening, as the sample and auxiliary electrode of working electrode in same level；Described sample erecting device is by rank Ladder shell ripple guide rod, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring composition, ladder screw thread waveguide rod, one-level sleeve, two Level sleeve, three-level sleeve and sealing ring are coaxially disposed, wherein：Ladder screw thread waveguide rod is provided with the first external screw thread, the second external screw thread, In the rear end of ladder screw thread waveguide rod, fixing end is set；First external screw thread is connected with the internal thread of one-level sleeve, so that ladder spiral shell The front end of ripple guide rod is placed in the first cavity and the second cavity of one-level sleeve, and the second external screw thread is placed in the second of one-level sleeve On the outside of cavity；One-level sleeve external screw thread is connected with three-level internal thread of sleeve, so that one-level sleeve is placed in the 3rd sky of three-level sleeve In chamber and the 4th cavity；Two-level sleeve is sleeved on the outside of three-level sleeve, and sealing ring is set between two-level sleeve and three-level sleeve；
The electrochemical testing device includes auxiliary electrode chuck, reference electrode chuck, working electrode chuck, electrochemistry number According to processing system；The auxiliary electrode chuck, reference electrode chuck and working electrode chuck respectively with electrolytic cell auxiliary electricity The fixing end of pole, reference electrode and ladder screw thread waveguide rod is connected, and is then handled by signal transmssion line and electrochemical data System is connected；
Described heater is arranged on the outside of reaction tank, and attemperator is arranged on the outside of heater, heating dress The inwall put sets temperature sensor, the temperature change for detecting electrolyte in reaction tank.
In the above-mentioned technical solutions, the quantity of the fastener is 6~8 groups, and fastener is by " bow " shape fastener Chuck, trip bolt and fastening gasket composition, fastener chuck material is 316 austenitic stainless steels；Fastener chuck bag First level section, vertical section and the second horizontal segment are included, the second horizontal segment upper surface is provided with the fastening gasket that thickness is 2~3mm, tightly It is fixedly mounted with and puts the material of pad for polytetrafluoroethylene (PTFE), prevents that fastening force from causing greatly very much aquarium to rupture.
In the above-mentioned technical solutions, described reaction tank, which is covered, is provided with stainless steel locating ring, on the stainless steel locating ring 6~8 trip bolt locating slots are evenly distributed with, a diameter of 4~5mm of trip bolt locating slot, depth are 0.5~0.6mm, tightly Gu screw locating slot is used to position described trip bolt, another effect of the stainless steel locating ring is subject to trip bolt The fastening force of application, it is to avoid the trip bolt damages the reaction tank lid.
In the above-mentioned technical solutions, described air inlet pipe thread hole quantity is 3~4, exhaust pipe thread hole quantity is 1~ 2, Luggin capillary screw thread hole number is 1, and auxiliary electrode screw thread hole number is 1, digital display thermometer probe screw thread hole count Measure as 1~2；Correspondingly, air inlet pipe quantity is 3~4, and blast pipe quantity is 1~2, and Luggin capillary quantity is 1, Auxiliary electrode quantity is 1, and digital display thermometer probe quantity is 1~2；Air inlet pipe, blast pipe, Luggin capillary, auxiliary electricity Pole and digital display thermometer probe respectively at air inlet pipe thread hole, exhaust pipe thread hole, Luggin capillary screwed hole, auxiliary electrode Screwed hole, digital display thermometer probe screwed hole are provided with sealing ring between connecting the latter two.
In the above-mentioned technical solutions, described air inlet pipe and blast pipe are with externally threaded glass tube；The air inlet pipe One end, which is equipped with, is used for the porous foam that bubble disperses, it is therefore an objective to the scattered dissolving for inputting gas and accelerating it in corrosive medium； The air inlet pipe is passed through one kind in high pure nitrogen or carbon dioxide or hydrogen sulfide, high pure nitrogen to corrosive medium deoxygenation, Carbon dioxide, vulcanization can simulate actual corrosive environment；Without using air inlet pipe thread hole set sealing screw sealed, The material of sealing screw is polytetrafluoroethylene (PTFE).
In the above-mentioned technical solutions, described auxiliary electrode is gauze platinum electrode；Described reference electrode is arranged on Lu Jinmao In tubule, the liquid injection port of the Luggin capillary is the structure with inside and outside double thread, the Luggin capillary external screw thread and institute The Luggin capillary screwed hole connection on aquarium is stated, the external screw thread of the golden capillary tube internal thread in the Shandong and the reference electrode leads to Helicitic texture connection is crossed, and uses rubber seal rings for seal；Registration coupon test surfaces at the opening at the Luggin capillary tip Mouthful center, and with tested sample keep 0.5~1mm distance.
In the above-mentioned technical solutions, described temperature sensor quantity is 1~8；Described heater uses resistance Heated water bath or oil bath mode are heated to electrolytic cell, temperature sensor by closed-loop policy automatically control firing rate and water or In the temperature of oil, water or oil that the reaction tank is put into heating and heat-insulating device, water level or oil level in heater are less than Ladder screw thread waveguide rod 2~5cm of lower end；In heater and attemperator, by setting heating target temperature, firing rate Water in the heater or oil are heated, to be heated to after target temperature, heater stop heating, and ensure to add Water or oil in thermal maintain target temperature ± 0.1 DEG C all the time.
In the above-mentioned technical solutions, a diameter of 5 ± 0.01mm of the test surfaces of sample, length is 7~8mm.
In the above-mentioned technical solutions, ladder screw thread waveguide rod is metal material, such as ferritic stainless steel；One-level sleeve, Two-level sleeve, three-level sleeve are insulating materials, such as polytetrafluoroethylene (PTFE).
In the above-mentioned technical solutions, the sealing ring is rubber seal.
In a kind of corrosion electrochemical test system in use, the internal thread of the second external screw thread of ladder screw thread waveguide rod and sample Connection, sample periphery set coupling oxidant layer, rotate ladder screw thread waveguide rod fixing end so that with ladder screw thread waveguide The test surfaces of the connected sample of the external screw thread of bar second, the second alignment surface of the first alignment surface, three-level sleeve with one-level sleeve is put down Together；Be fixedly linked using the internal thread and test device of second sleeve, and to sample carry out electrochemical corrosion test, using sample as Working electrode, is connected using wire with the ladder screw thread waveguide rod on the outside of test device, to gather the electrochemistry on sample Corrode signal；Digital display thermometer is popped one's head in and temperature sensor detects the true temperature of electrolytic cell internal corrosion medium, test to be achieved It is required that temperature and keep it is stable after can start test.
A kind of electrochemical testing device of acoustic emission detection material corrosion performance, including electrolytic cell, electrochemical testing device, Heater and attemperator；
The electrolytic cell includes reaction tank, reaction tank lid, gasket seal, fastener, sample erecting device, the reaction Pond is cylinder, and reaction tank upper end-face edge is provided with the top of flange, the reaction tank lid and reaction tank and is lined with gasket seal, reacts Chi Gai and reaction tank lead to fastener sealing；Reaction tank covers setting air inlet pipe thread hole, exhaust pipe thread hole, auxiliary electrode spiral shell Pit, digital display thermometer probe screwed hole, Luggin capillary screwed hole；Air inlet pipe thread hole is connected with air inlet pipe, blast pipe spiral shell Pit is connected with blast pipe, and auxiliary electrode screwed hole is connected with described auxiliary electrode, digital display thermometer probe screwed hole and number Aobvious thermometer connection；Luggin capillary screwed hole is connected with the external screw thread of Luggin capillary liquid injection port, so that Luggin capillary Crooked position is in reaction tank, just to the sample as working electrode at its opening, the internal thread of Luggin capillary liquid injection port with Reference electrode external screw thread is connected, so that reference liquid can be flow at the opening of sample in reference electrode；Luggin capillary It is located at opening, as the sample and auxiliary electrode of working electrode in same level；Described sample erecting device is by rank Ladder shell ripple guide rod, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring and acoustic emission sensor composition, ladder screw thread waveguide Bar, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring and acoustic emission sensor are coaxially disposed, wherein：Ladder screw thread waveguide Bar is provided with the first external screw thread, the second external screw thread, and the first external screw thread is connected with the internal thread of one-level sleeve, so that ladder screw thread waveguide The front end of bar is placed in the first cavity and the second cavity of one-level sleeve, and the second external screw thread is placed in outside the second cavity of one-level sleeve Side；Fixing end is set in the rear end of ladder screw thread waveguide rod, the acoustic emission sensor being in contact with it is set in fixing end；One-level Sleeve external screw thread is connected with three-level internal thread of sleeve, so that one-level sleeve is placed in the 3rd cavity and the 4th cavity of three-level sleeve It is interior；Two-level sleeve is sleeved on the outside of three-level sleeve, and sealing ring is set between two-level sleeve and three-level sleeve；
The electrochemical testing device includes auxiliary electrode chuck, reference electrode chuck, working electrode chuck, electrochemistry number According to processing system；The auxiliary electrode chuck, reference electrode chuck and working electrode chuck respectively with electrolytic cell auxiliary electricity Pole, reference electrode and ladder screw thread waveguide rod are connected, and are then connected by signal transmssion line with electrochemical data processing system；
Described heater is arranged on the outside of reaction tank, and attemperator is arranged on the outside of heater, heating dress The inwall put sets temperature sensor, the temperature change for detecting electrolyte in reaction tank.
In the above-mentioned technical solutions, the quantity of the fastener is 6~8 groups, and fastener is by " bow " shape fastener Chuck, trip bolt and fastening gasket composition, fastener chuck material is 316 austenitic stainless steels；Fastener chuck bag First level section, vertical section and the second horizontal segment are included, the second horizontal segment upper surface is provided with the fastening gasket that thickness is 2~3mm, tightly It is fixedly mounted with and puts the material of pad for polytetrafluoroethylene (PTFE), prevents that fastening force from causing greatly very much aquarium to rupture.
In the above-mentioned technical solutions, described reaction tank, which is covered, is provided with stainless steel locating ring, on the stainless steel locating ring 6~8 trip bolt locating slots are evenly distributed with, a diameter of 4~5mm of trip bolt locating slot, depth are 0.5~0.6mm, tightly Gu screw locating slot is used to position described trip bolt, another effect of the stainless steel locating ring is subject to trip bolt The fastening force of application, it is to avoid the trip bolt damages the reaction tank lid.
In the above-mentioned technical solutions, described air inlet pipe thread hole quantity is 3~4, exhaust pipe thread hole quantity is 1~ 2, Luggin capillary screw thread hole number is 1, and auxiliary electrode screw thread hole number is 1, digital display thermometer probe screw thread hole count Measure as 1~2；Correspondingly, air inlet pipe quantity is 3~4, and blast pipe quantity is 1~2, and Luggin capillary quantity is 1, Auxiliary electrode quantity is 1, and digital display thermometer probe quantity is 1~2；Air inlet pipe, blast pipe, Luggin capillary, auxiliary electricity Pole and digital display thermometer probe respectively at air inlet pipe thread hole, exhaust pipe thread hole, Luggin capillary screwed hole, auxiliary electrode Screwed hole, digital display thermometer probe screwed hole are provided with sealing ring between connecting the latter two.
In the above-mentioned technical solutions, described air inlet pipe and blast pipe are with externally threaded glass tube；The air inlet pipe One end, which is equipped with, is used for the porous foam that bubble disperses, it is therefore an objective to the scattered dissolving for inputting gas and accelerating it in corrosive medium； The air inlet pipe is passed through one kind in high pure nitrogen or carbon dioxide or hydrogen sulfide, high pure nitrogen to corrosive medium deoxygenation, Carbon dioxide, vulcanization can simulate actual corrosive environment；Without using air inlet pipe thread hole set sealing screw sealed, The material of sealing screw is polytetrafluoroethylene (PTFE).
In the above-mentioned technical solutions, described auxiliary electrode is gauze platinum electrode；Described reference electrode is arranged on Lu Jinmao In tubule, the liquid injection port of the Luggin capillary is the structure with inside and outside double thread, the Luggin capillary external screw thread and institute The Luggin capillary screwed hole connection on aquarium is stated, the external screw thread of the golden capillary tube internal thread in the Shandong and the reference electrode leads to Helicitic texture connection is crossed, and uses rubber seal rings for seal；Registration coupon test surfaces at the opening at the Luggin capillary tip Mouthful center, and with tested sample keep 0.5~1mm distance.
In the above-mentioned technical solutions, described temperature sensor quantity is 1~8；Described heater uses resistance Heated water bath or oil bath mode are heated to electrolytic cell, temperature sensor by closed-loop policy automatically control firing rate and water or In the temperature of oil, water or oil that the reaction tank is put into heating and heat-insulating device, water level or oil level in heater are less than Ladder screw thread waveguide rod 2~5cm of lower end；In heater and attemperator, by setting heating target temperature, firing rate Water in the heater or oil are heated, to be heated to after target temperature, heater stop heating, and ensure to add Water or oil in thermal maintain target temperature ± 0.1 DEG C all the time.
In the above-mentioned technical solutions, a diameter of 5 ± 0.01mm of the test surfaces of sample, length is 7~8mm.
In the above-mentioned technical solutions, ladder screw thread waveguide rod is metal material, such as ferritic stainless steel；One-level sleeve, Two-level sleeve, three-level sleeve are insulating materials, such as polytetrafluoroethylene (PTFE).
In the above-mentioned technical solutions, the sealing ring is rubber seal.
In the above-mentioned technical solutions, adhesive phase is set between fixing end and acoustic emission sensor.
In the above-mentioned technical solutions, acoustic emission sensor is fixed in fixing end using magnetic clamp.
A kind of electrochemical testing device of acoustic emission detection material corrosion performance is in use, outside ladder screw thread waveguide rod second The internal thread connection of screw thread and sample, sets coupling oxidant layer in the periphery of sample, rotates the fixing end of ladder screw thread waveguide rod, So that the test surfaces for the sample being connected with ladder screw thread the second external screw thread of waveguide rod, the first alignment surface, three-level with one-level sleeve Second alignment surface of sleeve is concordant；It is fixedly linked using the internal thread and test device of second sleeve, and electrification is carried out to sample Corrosion test is learned, using sample as working electrode, is connected using wire with the ladder screw thread waveguide rod on the outside of test device, with Gather the electrochemical corrosion signal on sample；The sound emission elastic wave that sample is sent in corrosion process passes through ladder screw thread waveguide Bar reaches acoustic emission sensor and displacement signal is converted into electric signal, outwards transmission；Digital display thermometer is popped one's head in and TEMP Device coordinates the true temperature of detection electrolytic cell internal corrosion medium, and test request temperature to be achieved simultaneously keeps to start to survey after stabilization Examination.
The utility model has the advantages that：
1. the utility model integrates sound emission Dynamic Non-Destruction Measurement technology and Electrochemical Measurement Technology, realize Line, in real time dynamic, detection material electrochemical corrosion process；Sample erecting device of the present utility model is arranged in the side of aquarium Face, heating can be heated or be incubated to corrosive medium by water-bath or oil bath mode with attemperator.
2. tested sample of the present utility model is cylindrical tiny sample, 19~20mm of area of test surfaces2, length is only , can the closely possible damage for reducing sampling process to actual components for 7mm.In addition, the utility model can be realized to reality The sampling of component minute sites, such as welding point different zones (root of weld, capping, Weld pipe mill, high temperature and low temperature hot shadow Ring etc.).
3. sample of the present utility model is installed by the way of threaded connection, and transmits corrosion by ladder screw thread waveguide rod Acoustic emission signal and electrochemical signals, it is of the present utility model compared with the mode that traditional epoxy resin sealing and wire conduct The installation of tested sample, dismounting, cleaning are all more portable and efficient.
4. the utility model includes multiple air inlet pipe, material corrosion mistake under Various Complex corrosive gas environments can be simulated Journey；The utility model secures the distance of Luggin capillary tip and tested sample, has unified Luggin capillary sophisticated and tested Influence of the distance of sample to test result.
5. do not limited by checked object material, as long as conduction.
6. it can be used in severe complicated working condition, as long as operator's remote control under safety, suitable environment , and detect that automatic degree is high, simple to operate, testing efficiency is higher, and labor intensity, detection device power consumption can be greatly reduced It is low, it is easy to carry, it is easy to the detection of operation field.
Brief description of the drawings
Fig. 1 is the electrochemical testing device workflow diagram of acoustic emission detection material corrosion performance of the present utility model；
Fig. 2 is electrolytic cell front view of the present utility model；
Fig. 3 is electrolytic cell side view of the present utility model；
Fig. 4 is electrolytic cell top view of the present utility model；
Fig. 5 is reaction tank schematic diagram of the present utility model；
Fig. 6 is fastener schematic diagram of the present utility model；
Fig. 7 is reaction tank lid schematic diagram of the present utility model；
Fig. 8 is sample erecting device schematic diagram a of the present utility model；
Fig. 9 is Fig. 8 profile；
Figure 10 is ladder screw thread waveguide rod schematic diagram of the present utility model；
Figure 11 is one-level sleeve schematic diagram of the present utility model；
Figure 12 is two-level sleeve schematic diagram of the present utility model；
Figure 13 is three-level sleeve schematic diagram of the present utility model；
Figure 14 is sample schematic diagram of the present utility model and profile；
Figure 15 is the utility model Luggin capillary scheme of installation；
Figure 16 is sample erecting device schematic diagram b of the present utility model；
Wherein：1 fastener；2 reaction tank gasket seals；3 temperature sensors；4 heaters；5 attemperators；6 reactions Chi Gai；7 reaction tanks；8 sample erecting devices；9 flanges；10 lateral external screw joints；
1-1 trip bolts, 1-2 first levels section, 1-3 vertical sections, 1-4 fastening gaskets, the horizontal segments of 1-5 second；6-1 is fastened Screw locating slot, 6-2 stainless steel locating rings, 6-3 air inlet pipe thread holes, 6-4 digital display thermometers probe screwed hole, 6-5 auxiliary electricity Pole screwed hole, 6-6 Luggin capillary screwed holes, 6-7 exhaust pipe thread holes；6-6-1 reference electrodes, 6-6-2 Luggin capillaries, 6- At 6-3 bending sections, 6-6-4 openings；8-1 ladder screw thread waveguide rods, 8-2 fixing ends, 8-3 one-level sleeves, 8-4 two-level sleeves, 8-5 Three-level sleeve, 8-6 sealing rings, 8-7 samples, 8-8 acoustic emission sensors；The external screw threads of 8-1-1 first, the external screw threads of 8-1-2 second；8- The alignment surfaces of 3-1 first, the cavitys of 8-3-2 first, the cavitys of 8-3-3 second, 8-3-4 sealing surfaces, 8-3-5 one-level sleeve external screw threads, 8- 3-6 one-level internal thread of sleeve；8-4-1 two-level sleeve internal threads；The alignment surfaces of 8-5-1 second, the cavitys of 8-5-2 the 3rd, 8-5-3 the 4th Cavity, 8-5-4 three-level internal thread of sleeve；8-7-1 test surfaces, 8-7-2 sample peripheries, 8-7-3 sample internal threads.
Figure 17 is electrochemical corrosion polarization curve of the two phase stainless steel in the 1mol/L NaCl aqueous solution；
Figure 18 is electrochemical potentials, current density and testing time of the two phase stainless steel in the 1mol/L NaCl aqueous solution Relation curve；
Figure 19 is sound emission amplitude of the two phase stainless steel in electrochemical corrosion course；
Figure 20 is acoustic emission count of the two phase stainless steel in electrochemical corrosion course；
Figure 21 is acoustic emission energy of the two phase stainless steel in electrochemical corrosion course；
Figure 22 is two phase stainless steel in the acoustic emission waveform (in Figure 18 1 point) during cathodic polarization；
Figure 23 is acoustic emission waveform (in Figure 18 2 point) of the two phase stainless steel in process of anodic polarization；
Figure 24 is acoustic emission waveform (in Figure 18 3 point) of the two phase stainless steel in process of anodic polarization；
Figure 25 is acoustic emission waveform (in Figure 18 4 point) of the two phase stainless steel in process of anodic polarization；
Figure 26 is acoustic emission waveform (in Figure 18 5 point) of the two phase stainless steel in process of anodic polarization；
Figure 27 is acoustic emission waveform (in Figure 18 6 point) of the two phase stainless steel in process of anodic polarization.
Embodiment
The utility model is further described with reference to the accompanying drawings and examples, but be should not be construed as new to this practicality The limitation of type.
Sample erecting device in the sample clamp tested for electrochemical corrosion, i.e., above-mentioned accompanying drawing 8, by ladder screw thread ripple Guide rod, one-level sleeve, two-level sleeve, three-level sleeve and sealing ring composition, ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, Three-level sleeve and sealing ring are coaxially disposed, wherein：Ladder screw thread waveguide rod is provided with outside the first external screw thread, the second external screw thread, first Screw thread is connected with the internal thread of one-level sleeve, so that the front end of ladder screw thread waveguide rod is placed in the first cavity and of one-level sleeve In two cavitys, the second external screw thread is placed on the outside of the second cavity of one-level sleeve；Set and fix in the rear end of ladder screw thread waveguide rod End；One-level sleeve external screw thread is connected with three-level internal thread of sleeve, so that one-level sleeve is placed in the 3rd cavity and of three-level sleeve In four cavitys；Two-level sleeve is sleeved on the outside of three-level sleeve, and sealing ring is set between two-level sleeve and three-level sleeve.
In the above-mentioned technical solutions, the sealing ring is rubber seal.
In the above-mentioned technical solutions, a diameter of 5 ± 0.01mm of the test surfaces of sample, length is 7~8mm.
In the above-mentioned technical solutions, ladder screw thread waveguide rod is metal material, such as ferritic stainless steel.
In the above-mentioned technical solutions, one-level sleeve, two-level sleeve, three-level sleeve are insulating materials, such as polytetrafluoroethyl-ne Alkene.
The internal thread connection in use, the second external screw thread of ladder screw thread waveguide rod and sample is being carried out, in the circumference of sample Face sets coupling oxidant layer, the fixing end of ladder screw thread waveguide rod is rotated, so as to be connected with ladder screw thread the second external screw thread of waveguide rod Sample test surfaces, the second alignment surface of the first alignment surface, three-level sleeve with one-level sleeve is concordant.Utilize second sleeve Internal thread is fixedly linked with test device, and carries out electrochemical corrosion test to sample, using sample as working electrode, utilizes wire It is connected with the ladder screw thread waveguide rod on the outside of test device, to gather the electrochemical corrosion signal on sample.
Sample erecting device in the fixture of acoustic emission detection material corrosion performance, i.e., above-mentioned accompanying drawing 16, by ladder screw thread Waveguide rod, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring and acoustic emission sensor composition, ladder screw thread waveguide rod, one Level sleeve, two-level sleeve, three-level sleeve, sealing ring and acoustic emission sensor are coaxially disposed, wherein：Ladder screw thread waveguide rod is provided with First external screw thread, the second external screw thread, the first external screw thread are connected with the internal thread of one-level sleeve, so that before ladder screw thread waveguide rod End is placed in the first cavity and the second cavity of one-level sleeve, and the second external screw thread is placed on the outside of the second cavity of one-level sleeve； The rear end of ladder screw thread waveguide rod sets fixing end, and the acoustic emission sensor being in contact with it is set in fixing end；One-level sleeve External screw thread is connected with three-level internal thread of sleeve, so that one-level sleeve is placed in the 3rd cavity and the 4th cavity of three-level sleeve；Two Level sleeve set sets sealing ring on the outside of three-level sleeve between two-level sleeve and three-level sleeve.
In the above-mentioned technical solutions, the sealing ring is rubber seal.
In the above-mentioned technical solutions, a diameter of 5 ± 0.01mm of the test surfaces of sample, length is 7~8mm.
In the above-mentioned technical solutions, ladder screw thread waveguide rod and fixing end are metal material, such as ferritic stainless steel.
In the above-mentioned technical solutions, one-level sleeve, two-level sleeve, three-level sleeve are insulating materials, such as polytetrafluoroethyl-ne Alkene.
In the above-mentioned technical solutions, adhesive phase is set between fixing end and acoustic emission sensor.
In the above-mentioned technical solutions, acoustic emission sensor is fixed in fixing end using magnetic clamp.
The internal thread connection in use, the second external screw thread of ladder screw thread waveguide rod and sample is carried out, in the periphery of sample Coupling oxidant layer is set, the fixing end of ladder screw thread waveguide rod is rotated, so as to be connected with ladder screw thread the second external screw thread of waveguide rod The test surfaces of sample, the second alignment surface of the first alignment surface, three-level sleeve with one-level sleeve is concordant.Using in second sleeve Screw thread is fixedly linked with test device, and to sample carry out electrochemical corrosion test, using sample as working electrode, using wire with Ladder screw thread waveguide rod on the outside of test device is connected, to gather the electrochemical corrosion signal on sample；Sample is in corrosion During the sound emission elastic wave that sends acoustic emission sensor is reached by ladder screw thread waveguide rod and displacement signal is converted into Electric signal, outwards transmission.
A kind of corrosion electrochemical test system, including electrolytic cell, electrochemical testing device, heater and attemperator； The electrolytic cell includes reaction tank, reaction tank lid, gasket seal, fastener, sample erecting device, and the reaction tank is cylinder Shape, reaction tank upper end-face edge is provided with flange, is lined with gasket seal at the top of the reaction tank lid and reaction tank, reaction tank lid and anti- Ying Chitong fasteners are sealed；Reaction tank covers setting air inlet pipe thread hole, exhaust pipe thread hole, auxiliary electrode screwed hole, number Aobvious thermometer probe screwed hole, Luggin capillary screwed hole；Air inlet pipe thread hole is connected with air inlet pipe, exhaust pipe thread hole and row Tracheae is connected, and auxiliary electrode screwed hole is connected with described auxiliary electrode, digital display thermometer probe screwed hole and digital display thermometer Connection；Luggin capillary screwed hole is connected with the external screw thread of Luggin capillary liquid injection port, so that the crooked position of Luggin capillary In reaction tank, just to the sample as working electrode, the internal thread and reference electrode of Luggin capillary liquid injection port at its opening External screw thread is connected, so that reference liquid can be flow at the opening of sample in reference electrode；At the opening of Luggin capillary, make It is located at for the sample and auxiliary electrode of working electrode in same level；Described sample erecting device is by ladder screw thread waveguide Bar, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring composition, ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three Level sleeve and sealing ring are coaxially disposed, wherein：Ladder screw thread waveguide rod is provided with the first external screw thread, the second external screw thread, in ladder spiral shell The rear end of ripple guide rod sets fixing end；First external screw thread is connected with the internal thread of one-level sleeve, so that ladder screw thread waveguide rod Front end be placed in the first cavity and the second cavity of one-level sleeve, the second external screw thread is placed in outside the second cavity of one-level sleeve Side；One-level sleeve external screw thread is connected with three-level internal thread of sleeve, so that one-level sleeve is placed in the 3rd cavity and of three-level sleeve In four cavitys；Two-level sleeve is sleeved on the outside of three-level sleeve, and sealing ring is set between two-level sleeve and three-level sleeve；The electricity Test chemical device includes auxiliary electrode chuck, reference electrode chuck, working electrode chuck, electrochemical data processing system；Institute State auxiliary electrode chuck, reference electrode chuck and working electrode chuck respectively with the auxiliary electrode on electrolytic cell, reference electrode with And the fixing end of ladder screw thread waveguide rod is connected, and is then connected by signal transmssion line with electrochemical data processing system；It is described Heater be arranged on the outside of reaction tank, attemperator is arranged on the outside of heater, and the inwall of heater is set Temperature sensor, the temperature change for detecting electrolyte in reaction tank.
In the above-mentioned technical solutions, the quantity of the fastener is 6~8 groups, and fastener is by " bow " shape fastener Chuck, trip bolt and fastening gasket composition, fastener chuck material is 316 austenitic stainless steels；Fastener chuck bag First level section, vertical section and the second horizontal segment are included, the second horizontal segment upper surface is provided with the fastening gasket that thickness is 2~3mm, tightly It is fixedly mounted with and puts the material of pad for polytetrafluoroethylene (PTFE), prevents that fastening force from causing greatly very much aquarium to rupture.
In the above-mentioned technical solutions, described reaction tank, which is covered, is provided with stainless steel locating ring, on the stainless steel locating ring 6~8 trip bolt locating slots are evenly distributed with, a diameter of 4~5mm of trip bolt locating slot, depth are 0.5~0.6mm, tightly Gu screw locating slot is used to position described trip bolt, another effect of the stainless steel locating ring is subject to trip bolt The fastening force of application, it is to avoid the trip bolt damages the reaction tank lid.
In the above-mentioned technical solutions, described air inlet pipe thread hole quantity is 3~4, exhaust pipe thread hole quantity is 1~ 2, Luggin capillary screw thread hole number is 1, and auxiliary electrode screw thread hole number is 1, digital display thermometer probe screw thread hole count Measure as 1~2；Correspondingly, air inlet pipe quantity is 3~4, and blast pipe quantity is 1~2, and Luggin capillary quantity is 1, Auxiliary electrode quantity is 1, and digital display thermometer probe quantity is 1~2；Air inlet pipe, blast pipe, Luggin capillary, auxiliary electricity Pole and digital display thermometer probe respectively at air inlet pipe thread hole, exhaust pipe thread hole, Luggin capillary screwed hole, auxiliary electrode Screwed hole, digital display thermometer probe screwed hole are provided with sealing ring between connecting the latter two.
In the above-mentioned technical solutions, described air inlet pipe and blast pipe are with externally threaded glass tube；The air inlet pipe One end, which is equipped with, is used for the porous foam that bubble disperses, it is therefore an objective to the scattered dissolving for inputting gas and accelerating it in corrosive medium； The air inlet pipe is passed through one kind in high pure nitrogen or carbon dioxide or hydrogen sulfide, high pure nitrogen to corrosive medium deoxygenation, Carbon dioxide, vulcanization can simulate actual corrosive environment；Without using air inlet pipe thread hole set sealing screw sealed, The material of sealing screw is polytetrafluoroethylene (PTFE)；
In the above-mentioned technical solutions, described auxiliary electrode is gauze platinum electrode；Described reference electrode is arranged on Lu Jinmao In tubule, the liquid injection port of the Luggin capillary is the structure with inside and outside double thread, the Luggin capillary external screw thread and institute The Luggin capillary screwed hole connection on aquarium is stated, the external screw thread of the golden capillary tube internal thread in the Shandong and the reference electrode leads to Helicitic texture connection is crossed, and uses rubber seal rings for seal；Registration coupon test surfaces at the opening at the Luggin capillary tip Mouthful center, and with tested sample keep 0.5~1mm distance.
In the above-mentioned technical solutions, described temperature sensor quantity is 1~8；Described heater uses resistance Heated water bath or oil bath mode are heated to electrolytic cell, temperature sensor by closed-loop policy automatically control firing rate and water or In the temperature of oil, water or oil that the reaction tank is put into heating and heat-insulating device, water level or oil level in heater are less than Ladder screw thread waveguide rod 2~5cm of lower end；In heater and attemperator, by setting heating target temperature, firing rate Water in the heater or oil are heated, to be heated to after target temperature, heater stop heating, and ensure to add Water or oil in thermal maintain target temperature ± 0.1 DEG C all the time.
In the above-mentioned technical solutions, a diameter of 5 ± 0.01mm of the test surfaces of sample, length is 7~8mm.
In the above-mentioned technical solutions, ladder screw thread waveguide rod is metal material, such as ferritic stainless steel；One-level sleeve, Two-level sleeve, three-level sleeve are insulating materials, such as polytetrafluoroethylene (PTFE).
In the above-mentioned technical solutions, the sealing ring is rubber seal.
In a kind of corrosion electrochemical test system in use, the internal thread of the second external screw thread of ladder screw thread waveguide rod and sample Connection, sample periphery set coupling oxidant layer, rotate ladder screw thread waveguide rod fixing end so that with ladder screw thread waveguide The test surfaces of the connected sample of the external screw thread of bar second, the second alignment surface of the first alignment surface, three-level sleeve with one-level sleeve is put down Together；Be fixedly linked using the internal thread and test device of second sleeve, and to sample carry out electrochemical corrosion test, using sample as Working electrode, is connected using wire with the ladder screw thread waveguide rod on the outside of test device, to gather the electrochemistry on sample Corrode signal；Digital display thermometer is popped one's head in and temperature sensor detects the true temperature of electrolytic cell internal corrosion medium, test to be achieved It is required that temperature and keep it is stable after can start test.
A kind of electrochemical testing device of acoustic emission detection material corrosion performance, including electrolytic cell, electrochemical testing device, Heater and attemperator；The electrolytic cell includes reaction tank, reaction tank lid, gasket seal, fastener, sample and installs dress Put, the reaction tank is cylinder, reaction tank upper end-face edge is provided with flange, and reaction tank lid and the reaction tank top is lined with close Gasket, reaction tank lid and reaction tank lead to fastener sealing；Reaction tank covers setting air inlet pipe thread hole, exhaust pipe screw thread Hole, auxiliary electrode screwed hole, digital display thermometer probe screwed hole, Luggin capillary screwed hole；Air inlet pipe thread hole and air inlet pipe Connection, exhaust pipe thread hole is connected with blast pipe, and auxiliary electrode screwed hole is connected with described auxiliary electrode, and digital display thermometer is visited Head thread hole is connected with digital display thermometer；Luggin capillary screwed hole is connected with the external screw thread of Luggin capillary liquid injection port, so that The crooked position of Luggin capillary is in reaction tank, just to the sample as working electrode, Luggin capillary fluid injection at its opening The internal thread of mouth is connected with reference electrode external screw thread, so that reference liquid can be flow at the opening of sample in reference electrode； It is located at the opening of Luggin capillary, as the sample and auxiliary electrode of working electrode in same level；Described sample Erecting device is made up of ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring and acoustic emission sensor, Ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring and acoustic emission sensor are coaxially disposed, wherein： Ladder screw thread waveguide rod is provided with the first external screw thread, the second external screw thread, and the first external screw thread is connected with the internal thread of one-level sleeve, so that The front end of ladder screw thread waveguide rod is placed in the first cavity and the second cavity of one-level sleeve, and the second external screw thread is placed in one-level sleeve The second cavity on the outside of；Fixing end is set in the rear end of ladder screw thread waveguide rod, sets the sound being in contact with it to send out in fixing end Penetrate sensor；One-level sleeve external screw thread is connected with three-level internal thread of sleeve, so that one-level sleeve is placed in the 3rd sky of three-level sleeve In chamber and the 4th cavity；Two-level sleeve is sleeved on the outside of three-level sleeve, and sealing ring is set between two-level sleeve and three-level sleeve； The electrochemical testing device includes auxiliary electrode chuck, reference electrode chuck, working electrode chuck, electrochemical data processing system System；The auxiliary electrode chuck, reference electrode chuck and working electrode chuck are electric with the auxiliary electrode on electrolytic cell, reference respectively Pole and ladder screw thread waveguide rod are connected, and are then connected by signal transmssion line with electrochemical data processing system；Described adds Thermal is arranged on the outside of reaction tank, and attemperator is arranged on the outside of heater, and the inwall of heater sets temperature Sensor, the temperature change for detecting electrolyte in reaction tank.
In the above-mentioned technical solutions, the quantity of the fastener is 6~8 groups, and fastener is by " bow " shape fastener Chuck, trip bolt and fastening gasket composition, fastener chuck material is 316 austenitic stainless steels；Fastener chuck bag First level section, vertical section and the second horizontal segment are included, the second horizontal segment upper surface is provided with the fastening gasket that thickness is 2~3mm, tightly It is fixedly mounted with and puts the material of pad for polytetrafluoroethylene (PTFE), prevents that fastening force from causing greatly very much aquarium to rupture.
In the above-mentioned technical solutions, described reaction tank, which is covered, is provided with stainless steel locating ring, on the stainless steel locating ring 6~8 trip bolt locating slots are evenly distributed with, a diameter of 4~5mm of trip bolt locating slot, depth are 0.5~0.6mm, tightly Gu screw locating slot is used to position described trip bolt, another effect of the stainless steel locating ring is subject to trip bolt The fastening force of application, it is to avoid the trip bolt damages the reaction tank lid.
In the above-mentioned technical solutions, described air inlet pipe thread hole quantity is 3~4, exhaust pipe thread hole quantity is 1~ 2, Luggin capillary screw thread hole number is 1, and auxiliary electrode screw thread hole number is 1, digital display thermometer probe screw thread hole count Measure as 1~2；Correspondingly, air inlet pipe quantity is 3~4, and blast pipe quantity is 1~2, and Luggin capillary quantity is 1, Auxiliary electrode quantity is 1, and digital display thermometer probe quantity is 1~2；Air inlet pipe, blast pipe, Luggin capillary, auxiliary electricity Pole and digital display thermometer probe respectively at air inlet pipe thread hole, exhaust pipe thread hole, Luggin capillary screwed hole, auxiliary electrode Screwed hole, digital display thermometer probe screwed hole are provided with sealing ring between connecting the latter two.
In the above-mentioned technical solutions, described air inlet pipe and blast pipe are with externally threaded glass tube；The air inlet pipe One end, which is equipped with, is used for the porous foam that bubble disperses, it is therefore an objective to the scattered dissolving for inputting gas and accelerating it in corrosive medium； The air inlet pipe is passed through one kind in high pure nitrogen or carbon dioxide or hydrogen sulfide, high pure nitrogen to corrosive medium deoxygenation, Carbon dioxide, vulcanization can simulate actual corrosive environment；Without using air inlet pipe thread hole set sealing screw sealed, The material of sealing screw is polytetrafluoroethylene (PTFE)；
In the above-mentioned technical solutions, described auxiliary electrode is gauze platinum electrode；Described reference electrode is arranged on Lu Jinmao In tubule, the liquid injection port of the Luggin capillary is the structure with inside and outside double thread, the Luggin capillary external screw thread and institute The Luggin capillary screwed hole connection on aquarium is stated, the external screw thread of the golden capillary tube internal thread in the Shandong and the reference electrode leads to Helicitic texture connection is crossed, and uses rubber seal rings for seal；Registration coupon test surfaces at the opening at the Luggin capillary tip Mouthful center, and with tested sample keep 0.5~1mm distance.
In the above-mentioned technical solutions, described temperature sensor quantity is 1~8；Described heater uses resistance Heated water bath or oil bath mode are heated to electrolytic cell, temperature sensor by closed-loop policy automatically control firing rate and water or In the temperature of oil, water or oil that the reaction tank is put into heating and heat-insulating device, water level or oil level in heater are less than Ladder screw thread waveguide rod 2~5cm of lower end；In heater and attemperator, by setting heating target temperature, firing rate Water in the heater or oil are heated, to be heated to after target temperature, heater stop heating, and ensure to add Water or oil in thermal maintain target temperature ± 0.1 DEG C all the time.
In the above-mentioned technical solutions, a diameter of 5 ± 0.01mm of the test surfaces of sample, length is 7~8mm.
In the above-mentioned technical solutions, ladder screw thread waveguide rod is metal material, such as ferritic stainless steel；One-level sleeve, Two-level sleeve, three-level sleeve are insulating materials, such as polytetrafluoroethylene (PTFE).
In the above-mentioned technical solutions, the sealing ring is rubber seal.
In the above-mentioned technical solutions, adhesive phase is set between fixing end and acoustic emission sensor.
In the above-mentioned technical solutions, acoustic emission sensor is fixed in fixing end using magnetic clamp.
A kind of electrochemical testing device of acoustic emission detection material corrosion performance is in use, outside ladder screw thread waveguide rod second The internal thread connection of screw thread and sample, sets coupling oxidant layer in the periphery of sample, rotates the fixing end of ladder screw thread waveguide rod, So that the test surfaces for the sample being connected with ladder screw thread the second external screw thread of waveguide rod, the first alignment surface, three-level with one-level sleeve Second alignment surface of sleeve is concordant；It is fixedly linked using the internal thread and test device of second sleeve, and electrification is carried out to sample Corrosion test is learned, using sample as working electrode, is connected using wire with the ladder screw thread waveguide rod on the outside of test device, with Gather the electrochemical corrosion signal on sample；The sound emission elastic wave that sample is sent in corrosion process passes through ladder screw thread waveguide Bar reaches acoustic emission sensor and displacement signal is converted into electric signal, outwards transmission；Digital display thermometer is popped one's head in and TEMP Device coordinates the true temperature of detection electrolytic cell internal corrosion medium, and test request temperature to be achieved simultaneously keeps to start to survey after stabilization Examination.
Electrochemistry and acoustic emission detection are carried out using aforementioned four technical scheme composition test device, it is specific as follows：
The concrete structure of the reaction tank lid refers to Fig. 7, and 3 air inlet pipe (are not drawn with 1 blast pipe in figure Go out) corresponding air inlet pipe thread hole and exhaust pipe thread hole connection are covered with the reaction tank respectively, and use rubber seal Sealing, air inlet pipe one end is packaged with the porous foam disperseed for bubble and is inserted into reaction tank bottom, and the other end passes through rubber Manage and be connected with the gas cylinder of corresponding input gas, gas flow is controlled by flowmeter；Described blast pipe one end is slightly inserted into In reaction tank, it is ensured that more than corrosive medium liquid level, the other end of the blast pipe is by rubber tube and equipped with alkali lye 5L sealing volumetric flask be connected, in volumetric flask equipped with enough sodium hydroxide lyes (3L) be used for absorb discharge sour gas Body.The interface of all glass tubes and rubber tube uses silica gel sealing.Saturation potassium chloride solution is filled using syringe The Luggin capillary, it is ensured that do not have bubble in the Luggin capillary, then passes through external screw thread and institute by the reference electrode State Luggin capillary internal thread to be attached by helicitic texture, the reference electrode is calomel electrode, reference liquid is saturation chlorine Change aqueous solutions of potassium.The concrete structure of the sample erecting device refers to Fig. 8 and Fig. 9, outside the second of ladder screw thread waveguide rod Appropriate vacuum grease is smeared on screw thread, to reduce corrosion acoustic emission signal decay, and rubber seal ladder screw thread ripple is enclosed within On second external screw thread of guide rod, a small amount of silica gel is uniformly then smeared on the sample periphery after mechanical polishing, derotation afterwards The second external screw thread threaded connection of sample ladder screw thread waveguide rod, sample rotation is enough to after tight, start to rotate ladder spiral shell backward Ripple guide rod, the one-level sleeve is slowly drawn in by the sample, until sample testing face and the first alignment surface, the second alignment surface It is substantially parallel, the unnecessary silica gel being extruded then is wiped using dust-free paper, and sample testing face is repeatedly cleaned with alcohol, then Sample erecting device is put into 24h in drying box, after silica gel is fully cured, the rubber seal is enclosed within two grades of sets On cylinder, then whole sample erecting device is connected by the lateral external screw joint of the two-level sleeve internal thread and reaction tank Connect.
The etchant solution configured is slowly imported in the reaction tank, to ensure that the sample testing face is completely immersed in corruption Lose in solution and do not spill over, it is desirable to which the etchant solution volume for injecting reaction tank is 1~1.4L.
The gasket seal of the reaction tank is enclosed within into the reaction tank to cover, then put down gently on the reaction tank, is adjusted The direction of the reaction tank lid makes center of the Luggin capillary tip just to the sample testing face.
6 described fasteners are installed, the fastening gasket are close to the lower edge of the flange of reaction tank first, simultaneously Trip bolt is directed at the trip bolt locating slot on the stainless steel locating ring, institute is then screwed using diagonal order successively 6 fasteners stated.
Data collection and analysis software is opened, electro-chemical test parameter and sound emission acquisition parameter are set.The electrochemistry The setting of test parameter includes electrochemical test method and corresponding test parameter, such as potentiodynamic polarization need to set open circuit electricity Position stabilization time, scanning potential range, potential scanning speed etc..The sound emission acquisition parameter, which is set, includes the signal amplification Device multiplication factor, threshold value, sample frequency, filter range, real-time display parameters etc..It should be noted that electro-chemical test is joined Number and sound emission acquisition parameter need according to specific sample material, corrosive environment, electrochemical test method and adjust；Then enter Acoustic emission sensor and the Couplings of the ladder screw thread waveguide rod described in the disconnected lead experimental evaluation of rower standard.In the ladder spiral shell Disconnected lead experiment is carried out on acoustic emission sensor installation end on ripple guide rod near the acoustic emission sensor, when collecting Disconnected lead acoustic emission signal amplitude think that the coupling of the acoustic emission sensor and the ladder screw thread waveguide rod is good when being higher than 90dB It is good；Then, the gas cylinder valve of input gas is opened, passes through flowmeter control input gas flow.
Finally, experiment is formally started.To ensure as far as possible in experimentation quiet environment and avoid touching electrolytic cell and Related connection line.After the completion of test, experiment will be automatically stopped.
The polarization curve and sound emission letter tested with the present apparatus during UNS S31803 two phase stainless steel potentiodynamic polarizations Number (electrochemical testing device：Gamry, Interface 1000, acoustic emission test device：PAC, PCI-2；Acoustic emission sensor Model：R15A；Signal amplifier model：2/4/6-AST), test solution is the 1mol/L NaCl aqueous solution.By the present apparatus according to After above-mentioned step is installed, the setting that described data collection and analysis software carries out experiment parameter is opened.Heat target Temperature setting is 60 DEG C.Electro-chemical test parameter setting：Electrochemical test method is potentiodynamic polarization, electric potential scanning scope for- 0.75VSCE-0.6VSCE, sweep speed is 0.5mVSCE/s, and OCP temperature-time is 30min, and setting electric current density connects Continue more than 100 μ A/cm2When, test is automatically stopped.Sound emission acquisition parameter is set：Signal amplifier multiplication factor is 40dB, door Threshold value is 30dB, and sample frequency is 2MSPS, and filter range is 20kHz-1MHz, and real-time acquisition parameter is amplitude, energy, counting And waveform.
The valve of front opening High Purity Nitrogen gas cylinder is tested, high pure nitrogen is controlled with 0.1mL/min flow velocity pair by flowmeter Test solution carries out deoxygenation, and the deoxygenation time is 1h.Meanwhile, click is begun to warm up, until solution temperature is stable 60 in electrolytic cell ±0.1℃.Afterwards, click on and start testing button, test formally starts.Test result is as shown in Figure 17-27.
Figure 17 is electrochemical corrosion polarization curve of the two phase stainless steel in the 1mol/L NaCl aqueous solution (60 DEG C).Figure 17 Polarization curve is divided into Liang Ge branches：Cathodic polarization (as indicated with 1) and anode polarization (shown in 2,3,4,5,6).Cathodic polarization process In it is main occur evolving hydrogen reaction, have bubble hydrogen generation in specimen surface.The dissolving of metal, passivation mainly occur for process of anodic polarization Film formation, passivating film dissolving etc..Since corrosion potential, with the rise of current potential, metal surface gradually forms passivating film, in office Portion region passivating film can occur dissolving and produce sub- point corrosion pit, and the sub- point corrosion pit of formation may also be repaired due to being passivated again, such as 2 in Figure 17, shown in 3,4,5.When current potential exceedes pitting potential, due to the formation of stable point corrosion pit, current density can be drastically Increase, as shown in Figure 17 6.
Figure 18 is electrochemical potentials, current density and survey of the two phase stainless steel in the 1mol/L NaCl aqueous solution (60 DEG C) The relation curve of examination time.
Figure 19 is sound emission amplitude of the two phase stainless steel in electrochemical corrosion course.1,2,3,4,5,6 sound are sent out in Figure 19 Amplitude is penetrated respectively with Figure 16 1, and 2,3,4,5,6 polarization potentials are corresponding with current density.
Figure 20 and Figure 21 are respectively acoustic emission count and energy of the two phase stainless steel in electrochemical corrosion course.Bubble hydrogen Rupture the acoustic emission signal amplitude, counting and the energy that produce and passivating film ruptures the sound emission letter to form the generation of meta-stable points pit Number amplitude, counting and energy are without significant difference.Compared with the acoustic emission signal that meta-stable points pit is produced, stable point corrosion pit is produced Amplitude and the higher acoustic emission signal of energy, but count value do not increase significantly.
Figure 22-27 is distributed as acoustic emission waveform of the two phase stainless steel during potentiodynamic polarization, respectively corresponding diagram 17 or 1,2,3,4,5,6 in Figure 19.Burst hydrogen bubbles produce typical sudden acoustic emission signal, and local passivating film ruptures and shape Mixed type acoustic emission signal is produced into point corrosion pit is stablized.The present apparatus can be realized while using acoustic emission and electrochemistry completely The purpose of technical testing material corrosion performance.

Claims (8)

1. a kind of electrochemical testing device of acoustic emission detection material corrosion performance, it is characterised in that：Including electrolytic cell, electrochemistry Test device, heater and attemperator；The electrolytic cell include reaction tank, reaction tank lid, gasket seal, fastener, Sample erecting device, the reaction tank is cylinder, and reaction tank upper end-face edge is provided with flange, the reaction tank lid and reaction tank Top is lined with gasket seal, and reaction tank lid and reaction tank lead to fastener sealing；Reaction tank covers setting air inlet pipe thread hole, row Gas-pipe thread hole, auxiliary electrode screwed hole, digital display thermometer probe screwed hole, Luggin capillary screwed hole；Air inlet pipe thread hole It is connected with air inlet pipe, exhaust pipe thread hole is connected with blast pipe, and auxiliary electrode screwed hole is connected with described auxiliary electrode, digital display Thermometer probe screwed hole is connected with digital display thermometer；Luggin capillary screwed hole and the external screw thread phase of Luggin capillary liquid injection port Even, so that the crooked position of Luggin capillary is in reaction tank, just to the sample as working electrode, Shandong gold capillary at its opening The internal thread of pipe liquid injection port is connected with reference electrode external screw thread, so that reference liquid can flow to opening for sample in reference electrode At mouthful；It is located at the opening of Luggin capillary, as the sample and auxiliary electrode of working electrode in same level；Described Sample erecting device is by ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring and acoustic emission sensor Composition, ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level sleeve, sealing ring and acoustic emission sensor are coaxially disposed, Wherein：Ladder screw thread waveguide rod is provided with the first external screw thread, the second external screw thread, and the internal thread of the first external screw thread and one-level sleeve connects Connect, so that the front end of ladder screw thread waveguide rod is placed in the first cavity and the second cavity of one-level sleeve, the second external screw thread is placed in On the outside of second cavity of one-level sleeve；Fixing end is set in the rear end of ladder screw thread waveguide rod, sets and is connect with it in fixing end Tactile acoustic emission sensor；One-level sleeve external screw thread is connected with three-level internal thread of sleeve, so that one-level sleeve is placed in three-level sleeve The 3rd cavity and the 4th cavity in；Two-level sleeve is sleeved on the outside of three-level sleeve, is set between two-level sleeve and three-level sleeve Put sealing ring；The electrochemical testing device includes auxiliary electrode chuck, reference electrode chuck, working electrode chuck, electrochemistry Data handling system, the auxiliary electrode chuck, reference electrode chuck and working electrode chuck respectively with the auxiliary on electrolytic cell Electrode, reference electrode and ladder screw thread waveguide rod are connected, and then pass through signal transmssion line and electrochemical data processing system phase Even；Described heater is arranged on the outside of reaction tank, and attemperator is arranged on the outside of heater, heater it is interior Wall sets temperature sensor.
2. a kind of electrochemical testing device of acoustic emission detection material corrosion performance according to claim 1, its feature exists In：The quantity of the fastener is 6~8 groups, and fastener is by " bow " shape fastener chuck, trip bolt and fastening gasket Composition；Fastener chuck includes first level section, vertical section and the second horizontal segment, and the second horizontal segment upper surface is provided with thickness and is 2~3mm fastening gasket.
3. a kind of electrochemical testing device of acoustic emission detection material corrosion performance according to claim 1, its feature exists In：Described reaction tank, which is covered, is provided with stainless steel locating ring, and 6~8 fastening spiral shells are evenly distributed with the stainless steel locating ring Locating slot is followed closely, a diameter of 4~5mm of trip bolt locating slot, depth are 0.5~0.6mm.
4. a kind of electrochemical testing device of acoustic emission detection material corrosion performance according to claim 1, its feature exists In：Described air inlet pipe thread hole quantity is 3~4, and exhaust pipe thread hole quantity is 1~2, Luggin capillary screw thread hole count Measure as 1, auxiliary electrode screw thread hole number is 1, digital display thermometer probe screw thread hole number is 1~2；Correspondingly, air inlet Pipe quantity is 3~4, and blast pipe quantity is 1~2, and Luggin capillary quantity is 1, and auxiliary electrode quantity is 1, digital display Thermometer probe quantity is 1~2；Air inlet pipe, blast pipe, Luggin capillary, auxiliary electrode and digital display thermometer probe difference Popped one's head in air inlet pipe thread hole, exhaust pipe thread hole, Luggin capillary screwed hole, auxiliary electrode screwed hole, digital display thermometer Screwed hole is provided with sealing ring between connecting the latter two.
5. a kind of electrochemical testing device of acoustic emission detection material corrosion performance according to claim 1, its feature exists In：Described air inlet pipe and blast pipe are with externally threaded glass tube；Described air inlet pipe one end, which is equipped with, is used for what bubble disperseed Porous foam；The air inlet pipe is passed through one kind in high pure nitrogen or carbon dioxide or hydrogen sulfide；Without using air inlet pipe Screwed hole sets sealing screw to be sealed.
6. a kind of electrochemical testing device of acoustic emission detection material corrosion performance according to claim 1, its feature exists In：Described temperature sensor quantity is 1~8, and the water level or oil level in heater are less than ladder screw thread waveguide rod lower end 2 ~5cm.
7. a kind of electrochemical testing device of acoustic emission detection material corrosion performance according to claim 1, its feature exists In：A diameter of 5 ± 0.01mm of the test surfaces of sample, length is 7~8mm；Ladder screw thread waveguide rod is metal material, one-level set Cylinder, two-level sleeve, three-level sleeve are insulating materials, and adhesive phase is set between fixing end and acoustic emission sensor.
8. a kind of electrochemical testing device of acoustic emission detection material corrosion performance according to claim 1, its feature exists In：Acoustic emission sensor is fixed in fixing end using magnetic clamp.
CN201621393338.9U 2016-12-19 2016-12-19 A kind of electrochemical testing device of acoustic emission detection material corrosion performance Expired - Fee Related CN206330874U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107884333A (en) * 2017-11-06 2018-04-06 水利部交通运输部国家能源局南京水利科学研究院 A kind of device for being used to measure electrochemical parameter under metal cavitation corrosion state
CN108562534A (en) * 2017-12-29 2018-09-21 浙江大学 A kind of reinforcing bar non-uniform corrosion auxiliary electrode positioning device
CN110044991A (en) * 2019-04-08 2019-07-23 深圳市雷凌广通技术研发有限公司 A kind of glucose sensing device with sealing and function of temperature control

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107884333A (en) * 2017-11-06 2018-04-06 水利部交通运输部国家能源局南京水利科学研究院 A kind of device for being used to measure electrochemical parameter under metal cavitation corrosion state
CN108562534A (en) * 2017-12-29 2018-09-21 浙江大学 A kind of reinforcing bar non-uniform corrosion auxiliary electrode positioning device
CN108562534B (en) * 2017-12-29 2023-09-05 浙江大学 Reinforcing bar non-uniform corrosion auxiliary electrode positioner
CN110044991A (en) * 2019-04-08 2019-07-23 深圳市雷凌广通技术研发有限公司 A kind of glucose sensing device with sealing and function of temperature control
CN110044991B (en) * 2019-04-08 2021-11-02 山东瑞光生物科技有限公司 Glucose sensing device with sealing and temperature control functions

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