CN106501168A - A kind of deep-sea simulated environment local corrosion test device and its method of testing - Google Patents
A kind of deep-sea simulated environment local corrosion test device and its method of testing Download PDFInfo
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- CN106501168A CN106501168A CN201611012989.3A CN201611012989A CN106501168A CN 106501168 A CN106501168 A CN 106501168A CN 201611012989 A CN201611012989 A CN 201611012989A CN 106501168 A CN106501168 A CN 106501168A
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- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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Abstract
The present invention provides a kind of deep-sea simulated environment local corrosion test device and method of testing, belongs to abyssal environment simulated test facility field.The assay device includes testing nacelle, test hatchcover and electrode assemblie；Electrode assemblie is fixed on experimental cabin lid by electrode watertight connector based on three-electrode system, and electrode watertight connector adopts line line dock needle stand, wherein：Working electrode is the electrod-array of branched microelectrode composition, and microelectrode is using matching somebody with somebody with working electrode watertight connector；Reference electrode is fixed in supporting with reference electrode watertight connector on plug wire cable, and auxiliary electrode is fixed in supporting with auxiliary electrode watertight connector on plug wire cable.Above-mentioned assay device is based on, present invention also offers a kind of test method.Present configuration is simple, easy for installation, highly versatile, it is achieved that array electrode test request under simulation deep-sea high-pressure environment, meets test environment sealing requirements；Can be used for deep-sea simulated environment local corrosion behavior and the research of mechanism.
Description
Technical field
The invention belongs to abyssal environment simulated test facility technical field, is related to a kind of deep-sea simulated environment local corrosion and surveys
Trial assembly is put and its method of testing.
Background technology
21 century is the century of ocean, deepens continuously with development in science and technology and to ocean research, increasing deep
The deep sea equipments such as extra large platform, bathyscaph have obtained development and application, while the etching problem of deep sea equipment material is also produced therewith.
The corrosion of material is often that the local corrosion of material is sensitive by locally germinating and developing, in the presence of the huge static pressure in deep-sea
Property can improve, cause its corrosion behavior and neritic environment to there is larger difference, local corrosion of the research material under abyssal environment
Behavior becomes one of deciding factor of deep sea equipment development.
Natural Environmental Test and artificial accelerated exposure testing are included to the deep-sea corrosion research of material at present.The former mainly adopts
With weightless lacing film method, accurate characterization can be carried out to the material corrosion behavior under abyssal environment, yet with deep-sea electrochemistry
The shortage of means of testing, only can be analyzed to the extent of corrosion of sample after off-test, it is impossible to the corrosion process to material
Studied；The object of study of the latter generally, based on block or plate electrode, cannot equally obtain the electricity of local corrosion of material
Chemical information.There is larger limitation to the research of material abyssal environment local corrosion at present, have impact on the corrosion research of material deep-sea
Deeply understand and widely studied.
Content of the invention
The technical assignment of the present invention is for the deficiencies in the prior art, seeks a kind of deep-sea simulated environment local of development and design
Corrosion tester and its method of testing.The device is realized to simulating deep-sea high-pressure environment material based on array electrode technology
The research of material local corrosion behavior, solving cannot carry out electricity to local corrosion of material under the conditions of simulation deep-sea high-pressure environment in the past
The problem of test chemical.
For solving above-mentioned technical problem, the present invention is achieved by the following technical solutions：
1st, the present invention provides a kind of deep-sea simulated environment local corrosion test device, and its agent structure includes testing nacelle, test
Hatchcover, electrode assemblie, external compression system, external electrochemical testing device and computer；
There is the test nacelle peristome, test hatchcover to be fixed on the peristome and be constituted with the test nacelle closed
Shell, electrode assemblie are sealed in the sealing shell, are opened up plus relief port on sealing shell, are provided with pressure on the outside of sealing shell
Sensor and/or pressure gauge, in order to the pressure value that tests inside seal casinghousing；
The electrode assemblie is based on three-electrode system, and which includes working electrode, reference electrode and auxiliary electrode, and electrode assemblie is through son
Matrix watertight connector is fixed on experimental cabin lid, the primary and secondary head end separate type grafting of the primary-secondary type watertight connector, primary-secondary type
Watertight connector A ends connection electrode component, and stretch in experimental cabin body, B ends are fixed on experimental cabin lid and stretch cable lead
Go out to outside test hatchcover, wherein：
Working electrode is the electrod-array of branched microelectrode sample composition, and microelectrode sample is using the primary and secondary supporting with working electrode
Formula watertight connector A ends sequentially correspondingly connect according to cable numbering, lay electrode according to test requirements document as electrod-array wiring
Array, and carry out package curing；Reference electrode is fixed in the primary-secondary type watertight connector A ends supporting with reference electrode, auxiliary electricity
Pole is fixed in the primary-secondary type watertight connector A ends supporting with auxiliary electrode；
The external compression system is by adding relief port for test nacelle pressurization；
The external electrochemical testing device includes electrod-array test device and electrochemical workstation, electrod-array test device
The cable lead at the primary-secondary type watertight connector B ends supporting with electrode assemblie is connected, for acquisition electrode current potential and CURRENT DISTRIBUTION
Information；Electrochemical workstation and the supporting primary-secondary type watertight connector B ends of reference electrode, auxiliary electrode and single microelectrode sample
Cable lead be connected, for gathering the electrochemical signals of reference electrode, auxiliary electrode, single microelectrode sample；
The computer is connected with external electrochemical testing device, for carrying out to the data that external electrochemical testing device is gathered
Record, analysis and process.
Specifically, the reference electrode and auxiliary electrode share a primary-secondary type watertight supporting with reference/auxiliary electrode
Fixed using nylon cable tie the position of both adapter, reference electrode and auxiliary electrode.
Specifically, the external side of the experimental cabin arranges thermal insulating groove.
Specifically, the working electrode is at least two groups, and every group between working electrode and reference electrode and auxiliary electrode
Relative distance is identical.
Specifically, the external compression system adopts wriggling hydraulic pump.
Specifically, sealed by sealing ring between the test hatchcover and test nacelle, and locked using fastening bolt.
Specifically, the A ends for being connected with electrode assemblie with the supporting primary-secondary type watertight connector of electrode assemblie are female
End, the B ends being fixed on experimental cabin lid are sub- head end.
Specifically, the described and supporting primary-secondary type watertight connector of electrode assemblie is fixed on B ends and examination on experimental cabin lid
The attachment structure conformance with standard SEACON watertight connector mounting means of hatch checking lid, and electricity is connected with according to the corresponding grafting of the order of connection
The A ends of pole component.
2nd, the present invention separately provides a kind of abyssal environment local corrosion method of testing, comprises the steps：
S1, making electrod-array：Microelectrode sample is adopted the primary-secondary type watertight connector A ends supporting with working electrode as electricity
Pole array wiring, sequentially correspondingly connects according to cable numbering, lays electrod-array according to test requirements document, and carry out package curing；
S2, reference electrode is fixed in the primary-secondary type watertight connector A ends supporting with reference electrode, by auxiliary electrode be fixed in
The supporting primary-secondary type watertight connector A ends of auxiliary electrode；
S3, working electrode cable, reference electrode cable and auxiliary electrode cable are correspondingly mounted in the primary and secondary supporting with electrode assemblie
The B ends of formula watertight connector, it is ensured that sealing；
S4, by primary-secondary type watertight connector A ends and the grafting of B ends, load corrosive liquid into experimental cabin body to nearly cabin Yan Chu, and cover
Test hatchcover is sealed fixation；
S5, with experimental solutions as pressurized fluid, using external compression system to test nacelle in pressurize, reach setting pressure after stop
Pressurization；
S6, carry out corrosion test：By electrod-array test device and the cable of the supporting primary-secondary type watertight connector of electrode assemblie
Lead is connected, acquisition electrode current potential and CURRENT DISTRIBUTION information；By electrochemical workstation and reference electrode, auxiliary electrode and Dan Zhiwei
The cable lead of the supporting primary-secondary type watertight connector of electrode samples is connected, collection reference electrode, auxiliary electrode, single microelectrode
The electrochemical signals of sample；
During test, by the way of adding test nacelle after injecting psychrolusia in thermal insulating groove or corrosive liquid is lowered the temperature,
Control corrosion rate liquid low-temperature test environment is simultaneously incubated；
Specifically, the corrosive liquid is natural sea-water or simulated seawater.
In actual use, pressure setting is carried out by pressure transducer and pressure gauge, when in Laboratory Module pressure reach pre-
If during value, can disconnect external compression system according to demand, test device can carry out independent pressurize.
A kind of deep-sea simulated environment local corrosion test device and its method of testing of the present invention, compared with prior art,
Produced beneficial effect is：
Using array electrode technology, the requirement to local corrosion of material electrochemical measurement is realized, using primary-secondary type watertight connector
Array electrode test request under simulation deep-sea high-pressure environment is achieved, Laboratory Module simple structure, easy for installation, highly versatile are full
Sufficient test environment sealing requirements, with independent pressurize, can be used for grinding for deep-sea simulated environment local corrosion behavior and mechanism
Study carefully.
Description of the drawings
Structural representation of the accompanying drawing 1 for present invention test hatchcover；
Accompanying drawing 2 is present invention test nacelle and the installation and internal structure schematic diagram for testing hatchcover.
In figure, 1, reference/auxiliary electrode primary-secondary type watertight connector hole, 2, lifting screw hole, 3, pressure transducer hole, 4,
Working electrode primary-secondary type watertight connector hole, 5, plus relief port, 6 and the supporting primary-secondary type watertight connector of reference/auxiliary electrode
B ends, 7, pressure gauge, 8, pressure transducer, 9 and the supporting primary-secondary type watertight connector B ends of working electrode, 10, plus relief tube,
11st, thermal insulating groove, 12, test nacelle, 13, test hatchcover.
Specific embodiment
1-2 is described in further detail to the present invention with specific embodiment below in conjunction with the accompanying drawings：
Embodiment：
As shown in Figure 2, a kind of deep-sea simulated environment local corrosion test device of the invention, its agent structure include experimental cabin
Body 12, test hatchcover 13, electrode assemblie, external compression system, external electrochemical testing device and computer.
As shown in accompanying drawing 1,2, test nacelle 12 have a peristome, test hatchcover 13 be fixed on the peristome and with institute
State test nacelle 12 and constitute sealing shell, and realize sealing pressurize.Electrode assemblie is sealingly mounted on the test hatchcover 13, examination
Open up on hatch checking lid 13 plus relief port 5, pressure transducer hole 3,13 edge of test hatchcover arranges four lifting screw holes 2.Adding
Set at relief port 5 plus relief tube 10, pressure transducer 8 and pressure gauge 7 is set at pressure transducer hole 3, in order to test seal casinghousing
Internal pressure value, sets lifting screw at lifting screw hole 2.
In above-mentioned technical proposal, plus pressurization pipeline section stretches into 12 bottom of test nacelle in relief tube 10, and relief tube section is located at
In test nacelle 12 more than corrosive liquid liquid surface.
Electrode assemblie is based on three-electrode system, and which includes working electrode, reference electrode and auxiliary electrode, and electrode assemblie is through son
Matrix watertight connector is fixed on test hatchcover 13, the primary and secondary head end separate type grafting of the primary-secondary type watertight connector, and will
Wherein one end of primary and secondary head end is designated as A ends, and the other end is designated as B ends, and A ends are identical with the quantity of B end interfaces.Primary-secondary type watertight connects
Device A ends connection electrode component, and stretch in test nacelle 12, B ends are fixed on test hatchcover 13 and extend out to cable lead
Outside test hatchcover 13.For simplicity, supporting with electrode assemblie in Fig. 2 primary-secondary type watertight connector only depicts A ends.
Working electrode is the electrod-array of branched microelectrode sample composition, and microelectrode sample is using supporting with working electrode
Sequentially correspondingly weld according to cable numbering, laid according to test requirements document as electrod-array wiring in primary-secondary type watertight connector A ends
Electrod-array, and carry out package curing；Reference electrode is welded on the primary-secondary type watertight connector A ends supporting with reference electrode, auxiliary
Electrode welding is helped at the primary-secondary type watertight connector A ends supporting with auxiliary electrode；
External compression system adopts hydraulic pressurization mode, external compression system preferably to wriggle hydraulic pump, by plus relief port 5 be examination
Hatch checking body 12 pressurizes.
External electrochemical testing device includes electrod-array test device and electrochemical workstation, electrod-array test device
The cable lead at the primary-secondary type watertight connector B ends supporting with electrode assemblie is connected, for acquisition electrode current potential and CURRENT DISTRIBUTION
Information；Electrochemical workstation and the supporting primary-secondary type watertight connector B ends of reference electrode, auxiliary electrode and single microelectrode sample
Cable lead be connected, for gathering the electrochemical signals of reference electrode, auxiliary electrode, single microelectrode sample.
Computer is connected with external electrochemical testing device, for carrying out to the data that external electrochemical testing device is gathered
Record, analysis and process.
On the basis of said structure, in order to easy accessibility, reference electrode and auxiliary electrode share one with reference/auxiliary
The supporting primary-secondary type watertight connector of electrode, the position of both reference electrode and auxiliary electrode is fixed using nylon cable tie.Three electricity
Polar body system is by testing the reference/auxiliary electrode primary-secondary type watertight connector hole 1, working electrode primary-secondary type water opened up on hatchcover 13
Close connecter hole 4 is on the test hatchcover 13.
On the basis of said structure, as a kind of temperature controlled mode of corrosive liquid, arrange absolutely on the outside of test nacelle 12
Edge heat preservation tank 11.The preferred PVC of 11 material of thermal insulating groove, thereon along being located at the 1/2 of test nacelle 12, diameter is than experimental cabin body
12 20 mm of length.
On the basis of said structure, be ensure test result accuracy, working electrode be at least two groups, per group of work
Relative distance between electrode and reference electrode and auxiliary electrode is identical.In the present embodiment, working electrode is two groups, reference electrode
When arranging with auxiliary electrode, set gradually along test 13 diametric(al) of hatchcover, when two groups of working electrodes are arranged, vertical test hatchcover
13 radial direction both sides are symmetrical arranged.
On the basis of said structure, by rubber o-ring helixseal between test hatchcover 13 and test nacelle 12, and adopt
Locked with fastening bolt.
On the basis of said structure, the primary-secondary type watertight connector supporting with electrode assemblie is connected with the A of electrode assemblie
Hold as female end, the B ends being fixed on test hatchcover 13 are sub- head end.
On the basis of said structure, the primary-secondary type watertight connector supporting with electrode assemblie is fixed on test hatchcover 13
B ends and test hatchcover 13 attachment structure conformance with standard SEACON watertight connector mounting means, and corresponding according to the order of connection
Grafting is welded with the A ends of electrode assemblie.
It is preferred that the primary-secondary type watertight connector B ends 9 supporting with working electrode be sub- head end, using 10-16 core SEACON lines-
Line dock band needle socket, band needle socket are stretched in test nacelle 12, and cable lead end is stretched out outside test hatchcover 13, with work electricity
Extremely supporting primary-secondary type watertight connector A ends（Not shown）For female end, according to the order of connection, correspond at this A ends 10-16 hole
Welding microelectrode sample.Further preferably supporting with reference/auxiliary electrode primary-secondary type watertight connector B ends 6 are sub- head end, adopt
With 2 core SEACON lines-line dock band needle socket, the primary-secondary type watertight connector A ends supporting with reference/auxiliary electrode（Do not scheme
Show）For female end, according to the order of connection, at this 2 hole of A ends, microelectrode sample is correspondingly welded.
On the basis of said structure, test nacelle 12 is designed as cylindrical vessel, and nominal volume is 5L, and rated pressure is
30MPa.
On the basis of said structure, reference electrode is the deep-sea Ag/AgCl electrodes that maximum pressure is 30MPa.Auxiliary electricity
Extremely platinum plate electrode, unilateral bare area are 10mm*10mm.
On the basis of said structure, test nacelle 12 and fitment material are chosen as 316 rustless steels.
2nd, the present invention separately provides a kind of abyssal environment local corrosion method of testing, comprises the steps：
S1, making electrod-array：Microelectrode sample is adopted the primary-secondary type watertight connector A ends supporting with working electrode as electricity
Pole array wiring, sequentially correspondingly connects according to cable numbering, lays electrod-array according to test requirements document, using epoxy encapsulation
Solidification；
S2, reference electrode is welded on the primary-secondary type watertight connector A ends supporting with reference electrode, by auxiliary electrode be welded on
The supporting primary-secondary type watertight connector A ends of auxiliary electrode；It is preferred that, reference electrode and auxiliary electrode share one with reference/auxiliary
The supporting primary-secondary type watertight connector B ends 6 of electrode, the position of both reference electrode and auxiliary electrode are solid respectively using nylon cable tie
Fixed, it is to avoid contact conducting；
S3, working electrode cable, reference electrode cable and auxiliary electrode cable are correspondingly mounted in the primary and secondary supporting with electrode assemblie
The B ends of formula watertight connector, it is ensured that sealing；
S4, by primary-secondary type watertight connector A ends and the grafting of B ends, load corrosive liquid to nearly cabin Yan Chu into test nacelle 12, and cover
Upper test hatchcover 13 is sealed fixation；
S5, with experimental solutions as pressurized fluid, using external compression system to test nacelle 12 in pressurize, reach setting pressure after stop
Only pressurize；
S6, carry out corrosion test：By electrod-array test device and the cable of the supporting primary-secondary type watertight connector of electrode assemblie
Lead is connected, acquisition electrode current potential and CURRENT DISTRIBUTION information；By electrochemical workstation and reference electrode, auxiliary electrode and Dan Zhiwei
The cable lead of the supporting primary-secondary type watertight connector of electrode samples is connected, collection reference electrode, auxiliary electrode, single microelectrode
The electrochemical signals of sample；
During test, using the side for adding test nacelle 12 after injecting psychrolusia in thermal insulating groove 11 or corrosive liquid being lowered the temperature
Formula, control corrosion rate liquid low-temperature test environment are simultaneously incubated；
Specifically, the corrosive liquid is natural sea-water or simulated seawater.
In actual use, pressure setting is carried out by pressure transducer 8 and pressure gauge 7, when pressure reaches in Laboratory Module
During preset value, pressue device can be disconnected according to demand, test device can carry out independent pressurize.
Above a kind of deep-sea simulated environment local corrosion test device of the present invention is described in detail, its structure letter
Single, accessory is mean square easy, and highly versatile can processing and fabricating shown in by specification accompanying drawing.
Claims (10)
1. a kind of deep-sea simulated environment local corrosion test device, its agent structure include testing nacelle, test hatchcover, electrode group
Part, external compression system, external electrochemical testing device and computer, it is characterised in that
There is the test nacelle peristome, test hatchcover to be fixed on the peristome and be constituted with the test nacelle closed
Shell, electrode assemblie are sealed in the sealing shell, are opened up plus relief port on sealing shell, are provided with pressure on the outside of sealing shell
Sensor and/or pressure gauge, in order to the pressure value that tests inside seal casinghousing；
The electrode assemblie is based on three-electrode system, and which includes working electrode, reference electrode and auxiliary electrode, and electrode assemblie is through son
Matrix watertight connector is fixed on experimental cabin lid, the primary and secondary head end separate type grafting of the primary-secondary type watertight connector, primary-secondary type
Watertight connector A ends connection electrode component, and stretch in experimental cabin body, B ends are fixed on experimental cabin lid and stretch cable lead
Go out to outside test hatchcover, wherein：
Working electrode is the electrod-array of branched microelectrode sample composition, and microelectrode sample is using the primary and secondary supporting with working electrode
Formula watertight connector A ends sequentially correspondingly connect according to cable numbering, lay electrode according to test requirements document as electrod-array wiring
Array, and carry out package curing；Reference electrode is fixed in the primary-secondary type watertight connector A ends supporting with reference electrode, auxiliary electricity
Pole is fixed in the primary-secondary type watertight connector A ends supporting with auxiliary electrode；
The external compression system is by adding relief port for test nacelle pressurization；
The external electrochemical testing device includes electrod-array test device and electrochemical workstation, electrod-array test device
The cable lead at the primary-secondary type watertight connector B ends supporting with electrode assemblie is connected, for acquisition electrode current potential and CURRENT DISTRIBUTION
Information；Electrochemical workstation and the supporting primary-secondary type watertight connector B ends of reference electrode, auxiliary electrode and single microelectrode sample
Cable lead be connected, for gathering the electrochemical signals of reference electrode, auxiliary electrode, single microelectrode sample；
The computer is connected with external electrochemical testing device, for carrying out to the data that external electrochemical testing device is gathered
Record, analysis and process.
2. a kind of deep-sea simulated environment local corrosion test device according to claim 1, it is characterised in that the reference
Electrode and auxiliary electrode share a primary-secondary type watertight connector supporting with reference/auxiliary electrode, reference electrode and auxiliary electricity
Fixed using nylon cable tie the position of both pole.
3. a kind of deep-sea simulated environment local corrosion test device according to claim 1, it is characterised in that the test
Thermal insulating groove is set on the outside of nacelle.
4. a kind of deep-sea simulated environment local corrosion test device according to claim 1 and 2, it is characterised in that described
Working electrode is at least two groups, and every group of relative distance between working electrode and reference electrode and auxiliary electrode is identical.
5. a kind of deep-sea simulated environment local corrosion test device according to claim 1 and 2, it is characterised in that described
External compression system adopts wriggling hydraulic pump.
6. a kind of deep-sea simulated environment local corrosion test device according to claim 1 and 2, it is characterised in that described
Sealed by sealing ring between test hatchcover and test nacelle, and locked using fastening bolt.
7. a kind of deep-sea simulated environment local corrosion test device according to claim 1 and 2, it is characterised in that described
It is female end that the primary-secondary type watertight connector supporting with electrode assemblie is connected with the A ends of electrode assemblie, is fixed on experimental cabin lid
B ends be sub- head end.
8. a kind of deep-sea simulated environment local corrosion test device according to claim 1 and 2, it is characterised in that described
The B ends that the primary-secondary type watertight connector supporting with electrode assemblie is fixed on experimental cabin lid are met with the attachment structure of test hatchcover
Standard SEACON watertight connector mounting means, and the A ends of electrode assemblie are connected with according to the corresponding grafting of the order of connection.
9. a kind of abyssal environment local corrosion method of testing, it is characterised in that comprise the steps：
S1, making electrod-array：Microelectrode sample is adopted the primary-secondary type watertight connector A ends supporting with working electrode as electricity
Pole array wiring, sequentially correspondingly connects according to cable numbering, lays electrod-array according to test requirements document, and carry out package curing；
S2, reference electrode is fixed in the primary-secondary type watertight connector A ends supporting with reference electrode, by auxiliary electrode be fixed in
The supporting primary-secondary type watertight connector A ends of auxiliary electrode；
S3, working electrode cable, reference electrode cable and auxiliary electrode cable are correspondingly mounted in the primary and secondary supporting with electrode assemblie
The B ends of formula watertight connector, it is ensured that sealing；
S4, by primary-secondary type watertight connector A ends and the grafting of B ends, load corrosive liquid into experimental cabin body to nearly cabin Yan Chu, and cover
Test hatchcover is sealed fixation；
S5, with experimental solutions as pressurized fluid, using external compression system to test nacelle in pressurize, reach setting pressure after stop
Pressurization；
S6, carry out corrosion test：By electrod-array test device and the line at the supporting primary-secondary type watertight connector B ends of electrode assemblie
Cable lead is connected, acquisition electrode current potential and CURRENT DISTRIBUTION information；By electrochemical workstation and reference electrode, auxiliary electrode and single
The cable lead at the supporting primary-secondary type watertight connector B ends of microelectrode sample is connected, collection reference electrode, auxiliary electrode, single
The electrochemical signals of microelectrode sample；
During test, by the way of adding test nacelle after injecting psychrolusia in thermal insulating groove or corrosive liquid is lowered the temperature,
Control corrosion rate liquid low-temperature test environment is simultaneously incubated.
10. a kind of abyssal environment local corrosion method of testing according to claim 9, it is characterised in that the corrosive liquid
For natural sea-water or simulated seawater.
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| CN107228823A (en) * | 2017-06-19 | 2017-10-03 | 中国船舶重工集团公司第七二五研究所 | A kind of aluminium alloy local corrosion evaluating apparatus |
| CN107271174A (en) * | 2017-07-21 | 2017-10-20 | 长沙矿山研究院有限责任公司 | A kind of deepwater environment simulator stand and deepwater environment simulation experiment method |
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| CN108709849A (en) * | 2018-04-28 | 2018-10-26 | 中海油信息科技有限公司北京分公司 | A kind of experimental provision and method for deep sea fixed-depth sampling and corrosion simulated experiment |
| CN110208341A (en) * | 2019-06-18 | 2019-09-06 | 厦门大学 | Electrolytic cell device for deep-sea simulated environment |
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