CN206311483U - The fixture of acoustic emission detection material corrosion performance - Google Patents
The fixture of acoustic emission detection material corrosion performance Download PDFInfo
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- CN206311483U CN206311483U CN201621393376.4U CN201621393376U CN206311483U CN 206311483 U CN206311483 U CN 206311483U CN 201621393376 U CN201621393376 U CN 201621393376U CN 206311483 U CN206311483 U CN 206311483U
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Abstract
The utility model discloses a kind of fixture of acoustic emission detection material corrosion performance, the 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, first external screw thread of ladder screw thread waveguide rod is connected with the internal thread of one-level sleeve, and the second external screw thread of ladder screw thread waveguide rod is placed in the second cavity outside of one-level sleeve；Fixing end is set in the rear end of ladder screw thread waveguide rod, acoustic emission sensor 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 is sleeved on three-level sleeve outside, and sealing ring is set between two-level sleeve and three-level sleeve.Sample of the present utility model is installed by the way of threaded connection, and transmits corrosion acoustic emission signal and electrochemical signals by ladder screw thread waveguide rod, and compared with traditional mode, the installation of the utility model sample, dismounting, cleaning are more portable and efficient.
Description
Technical field
The utility model is related to material corrosion performance testing field, and in particular to a kind of acoustic emission detection material corrosion performance
Fixture.
Background technology
Corrosion is a kind of slow damage process that material occurs in harsh Service Environment, with extremely strong disguised, idol
Right property, it is sudden and serious destructive the features such as.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
To be directed to the destructive detection of small sample, it is therefore intended that prior prediction corrosion proof to material or after-action review, but cannot to
Labour large-scale component corrosion condition carries 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 set
That counts is sufficiently large.Welding point is typically structural member link the weakest, if it is desired to the different zones (weldering of Welded Joints
Seam root, capping, Weld pipe mill, high temperature and low temperature heat affecting etc.) sound emission and Electrochemical Detection are carried out, the limit based on sampling
System, existing test device cannot 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 cannot be simulated；(4) sample
The complex operation of installation and removal.
The content of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of sample for electrochemical corrosion test
Product fixture；
The purpose of this utility model is also resided in and 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.
For the sample clamp of electrochemical corrosion test, by ladder screw thread waveguide rod, one-level sleeve, two-level sleeve, three-level
Sleeve and sealing ring are constituted, and 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 first cavity and the second cavity of one-level sleeve, the second external screw thread is placed in one-level
The second cavity outside 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
Sleeve outside, 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.
When being used, ladder screw thread the second external screw thread of waveguide rod is connected with the internal thread of sample, 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；Using second sleeve
Internal thread is fixedly linked with test device, and carries out electrochemical corrosion test to sample, with sample as working electrode, using 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 the first external screw thread, the second external screw thread, outside 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 first cavity and of one-level sleeve
In two cavitys, the second external screw thread is placed in the second cavity outside of one-level sleeve；Set in the rear end of ladder screw thread waveguide rod and fixed
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 three-level sleeve outside, 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.
When being used, ladder screw thread the second external screw thread of waveguide rod is connected with the internal thread of sample, 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 carries out electrochemical corrosion test to sample, with 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 flange, and the reaction tank lid and reaction tank top are lined with gasket seal, react
Chi Gai and the logical fastener sealing of reaction tank；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 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 in same level at opening, as the sample and auxiliary electrode of working electrode；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 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
Cavity outside；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 three-level sleeve outside, 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 on auxiliary electricity
The fixing end of pole, reference electrode and ladder screw thread waveguide rod is connected, and is then processed 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 are 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 fastening force from causing very much aquarium to rupture greatly.
In the above-mentioned technical solutions, described reaction tank is covered and 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 applying, 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 is 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 is equipped with for the scattered porous foam of bubble, it is therefore an objective to which dispersion input gas simultaneously accelerates its dissolving in corrosive medium；
The air inlet pipe is passed through the 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；The air inlet pipe thread hole not used sets sealing screw and is 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 Shandong gold capillary tube internal thread leads to the external screw thread of the reference electrode
Helicitic texture connection is crossed, and uses rubber seal rings for seal；Registration coupon test surfaces at the opening at the Luggin capillary tip
The center of mouth, and the distance of 0.5~1mm is kept with tested sample.
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
The temperature of oil, in the water that the reaction tank is put into heating and heat-insulating device or oil, 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 or oil in the heater is 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.
When a kind of corrosion electrochemical test system is used, 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；It is fixedly linked using the internal thread and test device of second sleeve, and electrochemical corrosion test is carried out to sample, is with sample
Working electrode, is connected, with the ladder screw thread waveguide rod on the outside of test device using wire to gather the electrochemistry on sample
Corrosion 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 stabilization 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 flange, and the reaction tank lid and reaction tank top are lined with gasket seal, react
Chi Gai and the logical fastener sealing of reaction tank；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 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 in same level at opening, as the sample and auxiliary electrode of working electrode；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 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 three-level sleeve outside, 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 on auxiliary electricity
Pole, reference electrode and ladder screw thread waveguide rod are connected, and are then connected with electrochemical data processing system by signal transmssion line；
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 are 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 fastening force from causing very much aquarium to rupture greatly.
In the above-mentioned technical solutions, described reaction tank is covered and 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 applying, 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 is 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 is equipped with for the scattered porous foam of bubble, it is therefore an objective to which dispersion input gas simultaneously accelerates its dissolving in corrosive medium；
The air inlet pipe is passed through the 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；The air inlet pipe thread hole not used sets sealing screw and is 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 Shandong gold capillary tube internal thread leads to the external screw thread of the reference electrode
Helicitic texture connection is crossed, and uses rubber seal rings for seal；Registration coupon test surfaces at the opening at the Luggin capillary tip
The center of mouth, and the distance of 0.5~1mm is kept with tested sample.
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
The temperature of oil, in the water that the reaction tank is put into heating and heat-insulating device or oil, 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 or oil in the heater is 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.
When a kind of electrochemical testing device of acoustic emission detection material corrosion performance is used, outside ladder screw thread waveguide rod second
Screw thread is connected with the internal thread of sample, and coupling oxidant layer is set in the periphery of sample, rotates the fixing end of ladder screw thread waveguide rod,
So that the test surfaces of 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, with sample as working electrode, is connected with the ladder screw thread waveguide rod on the outside of test device using wire, with
Electrochemical corrosion signal on collection sample；The sound emission elastic wave that sample sends 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 coordinate detection electrolytic cell internal corrosion medium true temperature, test request temperature to be achieved and keep stabilization after can start survey
Examination.
The utility model has the advantages that：
1. the utility model integrates sound emission Dynamic Non-Destruction Measurement technology and Electrochemical Measurement Technology, realizes
Line, dynamic, real-time 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 by water-bath or oil bath mode with attemperator to corrosive medium.
2. tested sample of the present utility model is cylindrical tiny sample, the 19~20mm of area of test surfaces2, length is for only
It is 7mm, can the closely possible damage for reducing sampling process to actual components.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 sealing and wire conduct
The installation of tested sample, dismounting, cleaning are all more portable and efficient.
4. do not limited by checked object material, as long as conductive.
5. 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 labour intensity, testing equipment 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 the profile of Fig. 8；
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-
6-3 bending sections, at 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/LNaCl aqueous solution；
Figure 18 is electrochemical potentials of the two phase stainless steel in the 1mol/LNaCl aqueous solution, current density and testing time
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 acoustic emission waveform (in Figure 18 1 point) of the two phase stainless steel 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.
Specific 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.
For the sample clamp of electrochemical corrosion test, i.e., the sample erecting device in 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 the first external screw thread, the second external screw thread, outside 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 first cavity and of one-level sleeve
In two cavitys, the second external screw thread is placed in the second cavity outside of one-level sleeve；Set in the rear end of ladder screw thread waveguide rod and fixed
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 three-level sleeve outside, 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.
When being used, ladder screw thread the second external screw thread of waveguide rod is connected with the internal thread of sample, 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.Using second sleeve
Internal thread is fixedly linked with test device, and carries out electrochemical corrosion test to sample, with sample as working electrode, using 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, i.e., the sample erecting device in 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 first cavity and the second cavity of one-level sleeve, and the second external screw thread is placed in the second cavity outside 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.
When being used, ladder screw thread the second external screw thread of waveguide rod is connected with the internal thread of sample, 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 carries out electrochemical corrosion test to sample, with 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, and the reaction tank lid and reaction tank top are lined with gasket seal, 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, is vented pipe thread hole with 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
For the sample and auxiliary electrode of working electrode are located 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 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 three-level sleeve outside, 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 electrolytic cell on auxiliary electrode, reference electrode with
And the fixing end of ladder screw thread waveguide rod is connected, and is then connected with electrochemical data processing system by signal transmssion line；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 are 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 fastening force from causing very much aquarium to rupture greatly.
In the above-mentioned technical solutions, described reaction tank is covered and 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 applying, 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 is 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 is equipped with for the scattered porous foam of bubble, it is therefore an objective to which dispersion input gas simultaneously accelerates its dissolving in corrosive medium；
The air inlet pipe is passed through the 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；The air inlet pipe thread hole not used sets sealing screw and is 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 Shandong gold capillary tube internal thread leads to the external screw thread of the reference electrode
Helicitic texture connection is crossed, and uses rubber seal rings for seal；Registration coupon test surfaces at the opening at the Luggin capillary tip
The center of mouth, and the distance of 0.5~1mm is kept with tested sample.
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
The temperature of oil, in the water that the reaction tank is put into heating and heat-insulating device or oil, 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 or oil in the heater is 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.
When a kind of corrosion electrochemical test system is used, 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；It is fixedly linked using the internal thread and test device of second sleeve, and electrochemical corrosion test is carried out to sample, is with sample
Working electrode, is connected, with the ladder screw thread waveguide rod on the outside of test device using wire to gather the electrochemistry on sample
Corrosion 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 stabilization 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 that reaction tank, reaction tank lid, gasket seal, fastener, sample install dress
Put, the reaction tank is cylinder, reaction tank upper end-face edge is provided with flange, and the reaction tank lid and reaction tank top are lined with close
The logical fastener sealing of gasket, reaction tank lid and reaction tank；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 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 in same level at the opening of Luggin capillary, as the sample and auxiliary electrode of working electrode；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 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 outside；Fixing end is set in the rear end of ladder screw thread waveguide rod, the sound hair being in contact with it is set 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 three-level sleeve outside, 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 respectively with electrolytic cell on auxiliary electrode, reference electricity
Pole and ladder screw thread waveguide rod are connected, and are then connected with electrochemical data processing system by signal transmssion line；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 are 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 fastening force from causing very much aquarium to rupture greatly.
In the above-mentioned technical solutions, described reaction tank is covered and 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 applying, 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 is 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 is equipped with for the scattered porous foam of bubble, it is therefore an objective to which dispersion input gas simultaneously accelerates its dissolving in corrosive medium；
The air inlet pipe is passed through the 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；The air inlet pipe thread hole not used sets sealing screw and is 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 Shandong gold capillary tube internal thread leads to the external screw thread of the reference electrode
Helicitic texture connection is crossed, and uses rubber seal rings for seal；Registration coupon test surfaces at the opening at the Luggin capillary tip
The center of mouth, and the distance of 0.5~1mm is kept with tested sample.
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
The temperature of oil, in the water that the reaction tank is put into heating and heat-insulating device or oil, 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 or oil in the heater is 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.
When a kind of electrochemical testing device of acoustic emission detection material corrosion performance is used, outside ladder screw thread waveguide rod second
Screw thread is connected with the internal thread of sample, and coupling oxidant layer is set in the periphery of sample, rotates the fixing end of ladder screw thread waveguide rod,
So that the test surfaces of 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, with sample as working electrode, is connected with the ladder screw thread waveguide rod on the outside of test device using wire, with
Electrochemical corrosion signal on collection sample；The sound emission elastic wave that sample sends 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 coordinate detection electrolytic cell internal corrosion medium true temperature, test request temperature to be achieved and keep stabilization after can start survey
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 for the scattered porous foam of bubble and is inserted into reaction tank bottom, and the other end passes through rubber
Pipe is connected with the gas cylinder of corresponding input gas, and 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.All glass tubes use silica gel sealing with the interface of rubber tube.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, is decayed with reducing corrosion acoustic emission signal, and rubber seal is enclosed within ladder screw thread ripple
On second external screw thread of guide rod, the then a small amount of silica gel of uniform application, afterwards derotation on the sample periphery after mechanical polishing
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 two grades of sets is enclosed within
On cylinder, then whole sample erecting device is connected by the two-level sleeve internal thread with the lateral external screw joint of reaction tank
Connect.
The etchant solution that will have been configured slowly is imported in the reaction tank, to ensure that the sample testing face is completely immersed in corruption
Erosion solution in and do not spill over, it is desirable to inject reaction tank etchant solution volume be 1~1.4L.
The gasket seal of the reaction tank is enclosed within into the reaction tank to cover, is then put down gently on the reaction tank, adjusted
The direction of the reaction tank lid makes the Luggin capillary tip just to the center in the sample testing face.
6 described fasteners are installed, the fastening gasket is close to the lower edge of the flange of reaction tank first, while
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 is set includes that the signal amplifies
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
Accurate acoustic emission sensor described in lead experimental evaluation and the Couplings of the ladder screw thread waveguide rod of breaking of rower.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 to think that the acoustic emission sensor and the ladder screw thread waveguide rod are coupled when being higher than 90dB good
It is good；Then, the gas cylinder valve of input gas is opened, by 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 tested during UNS S31803 two phase stainless steel potentiodynamic polarizations with the present apparatus and sound emission are believed
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 NaCl aqueous solution of 1mol/L.By the present apparatus according to
After above-mentioned step is installed, opening described data collection and analysis software carries out the setting of experiment parameter.Heating 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 Collection 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 the flow velocity pair of 0.1mL/min by flowmeter
Test solution carries out deoxygenation, and the deoxygenation time is 1h.Meanwhile, click begins to warm up, until solution temperature stabilization is 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 there is evolving hydrogen reaction, there is bubble hydrogen to produce in specimen surface.Mainly there is the dissolving of metal, passivation in process of anodic polarization
Film is formed, passivating film dissolves etc..Since corrosion potential, with the rising of current potential, metal surface gradually forms passivating film, in office
Portion region passivating film can occur dissolving and produce sub- point corrosion pit, the sub- point corrosion pit of formation to be likely to 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 the point corrosion pit of stabilization, current density can be drastically
Increase, as shown in Figure 17 6.
Figure 18 is electrochemical potentials of the two phase stainless steel in the 1mol/L NaCl aqueous solution (60 DEG C), current density and survey
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 hair in Figure 19
Penetrate amplitude corresponding with current density with 1,2,3,4,5,6 polarization potentials in Figure 16 respectively.
Figure 20 and Figure 21 are respectively acoustic emission count and energy of the two phase stainless steel in electrochemical corrosion course.Bubble hydrogen
The sound emission that acoustic emission signal amplitude, counting and the energy for rupturing generation form the generation of meta-stable points pit with passivation film rupture is believed
Number amplitude, count and energy is without significant difference.Compared with the acoustic emission signal that meta-stable points pit is produced, stabilization point corrosion pit is produced
Amplitude and energy acoustic emission signal higher, 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
In Figure 19 1,2,3,4,5,6.Burst hydrogen bubbles produce typical sudden acoustic emission signal, and part is passivated film rupture and shape
Mixed type acoustic emission signal is produced into point corrosion pit is stablized.The present apparatus can be realized using acoustic emission and electrochemistry simultaneously completely
The purpose of technical testing material corrosion performance.
Claims (7)
1. the fixture of acoustic emission detection material corrosion performance, it is characterised in that：By ladder screw thread waveguide rod, one-level sleeve, two grades
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 outer spiral shell
Line, 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 of one-level sleeve
In one cavity and the second cavity, the second external screw thread is placed in the second cavity outside of one-level sleeve；After ladder screw thread waveguide rod
End sets fixing end, and the acoustic emission sensor being in contact with it is set in fixing end；In one-level sleeve external screw thread and three-level sleeve
Screw 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 set
Cylinder outside, sealing ring is set between two-level sleeve and three-level sleeve.
2. the fixture of acoustic emission detection material corrosion performance according to claim 1, it is characterised in that：The sealing ring is
Rubber seal.
3. the fixture of acoustic emission detection material corrosion performance according to claim 1, it is characterised in that：The test surfaces of sample
A diameter of 5 ± 0.01mm, length be 7~8mm.
4. the fixture of acoustic emission detection material corrosion performance according to claim 1, it is characterised in that：Ladder screw thread waveguide
Bar is metal material.
5. the fixture of acoustic emission detection material corrosion performance according to claim 1, it is characterised in that：One-level sleeve, two
Level sleeve, three-level sleeve are insulating materials.
6. the fixture of acoustic emission detection material corrosion performance according to claim 1, it is characterised in that：In fixing end harmony
Adhesive phase is set between emission sensor.
7. the fixture of acoustic emission detection material corrosion performance according to claim 1, it is characterised in that：Using magnetic clamp
Acoustic emission sensor is fixed in fixing end.
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