CN104458559A - Device capable of testing stress-electrochemical corrosion - Google Patents
Device capable of testing stress-electrochemical corrosion Download PDFInfo
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- CN104458559A CN104458559A CN201410677141.7A CN201410677141A CN104458559A CN 104458559 A CN104458559 A CN 104458559A CN 201410677141 A CN201410677141 A CN 201410677141A CN 104458559 A CN104458559 A CN 104458559A
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Abstract
The invention relates to a device capable of testing stress-electrochemical corrosion in the presence of anaerobic bacteria. The device comprises an electrochemical workstation, a stress corrosion stretcher, a constant-temperature water bath and a self-control stretching box, wherein the self-control stretching box adopts a cylindrical double-chamber structure; a medium solution flows in the outer chamber of the self-control stretching box; a test solution is contained in the inner chamber of the self-control stretching box; the top end of the outer chamber is sealed; a bracket is arranged on the wall of the inner chamber; the inner chamber is lower than the outer chamber; a polarity of holes are drilled in a box cover; the gap between the box cover and a box body is sealed with a sealing film; the self-control stretching box is sleeved by a layer of cylindrical heat insulation cover; rubber bands are arranged at two ends of the heat insulation cover; two medium solutions can be adopted in the constant-temperature water bath to heat or cool the test solution. The device can prevent the solutions from spilling out of the self-control stretching box, provides a constant-temperature closed stress corrosion environment for a stretching sample and realizes synchronous testing of various testing methods.
Description
Technical field
The present invention relates to a kind of corrosion tester, particularly relate to a kind of stress-galvanic corrosion proving installation that simultaneously can carry out stress corrosion and galvanic corrosion test under anaerobion exists.
Background technology
At present, known stress corrosion proving installation is made up of stretch box and drawing machine.Test specimen is sealed on stretching box, in box, puts into testing liquid bonnet upper box cover, whole stretching box is fixed on stress corrosion drawing machine and tests.But the box body of this stretching box is easily separated with lid, and solution often spills on stress corrosion drawing machine, cause the corrosion of drawing machine transmission shaft.And current stress corrosion proving installation can only at room temperature carry out, and anaerobion suitable growth is in 30 DEG C of constant-temperatureanaerobic anaerobic environment, stress corrosion test under carrying out having anaerobion to exist under room temperature can cause anaerobion activity to reduce, corrosive attack weakens, test findings and truth quite different, easily cause erroneous judgement.
Summary of the invention
The deficiency that existing stress corrosion (cracking) test is only limitted to room temperature condition in order to overcome, solution easily overflows, the invention provides a kind of stress-galvanic corrosion proving installation, this device can not only carry out conventional stress corrosion test, and can isoperibol be provided, carry out the device of the stress-galvanic corrosion synchronism detection under anaerobion existence.
The technical solution adopted for the present invention to solve the technical problems is:
Comprise electrochemical workstation, stress corrosion drawing machine, constant temperature water bath and stretching box, stretching box is fixed on stress corrosion drawing machine, and stretching box intake-outlet is communicated with constant temperature water bath; Described stretching box is two rooms structures, and mistress walks medium solution, and testing liquid is put in interior room; Mistress shuts on top, and chamber wall has support, and support supports lid, and between lid and box body, space sealed membrane seals; Stress loading test specimen is fixed on stretching box bottom end seal beyond the Great Wall, and salt bridge, platinized platinum are arranged on lid and are positioned at stress loading test specimen both sides, and salt bridge connects contrast electrode, and platinized platinum, stress loading test specimen and contrast electrode are connected respectively to the electrode interface of electrochemical workstation.
Described interior room height is lower than mistress.
Described lid is drilled with multiple hole.
Described salt bridge and platinized platinum positive counter stress loading specimen central part.
Described stretching box overcoat has stay-warm case.
Thermometer and nitrogen tube is inserted with in described interior room testing liquid.
Be communicated with by rubber tube between described constant temperature water bath and stretching box, rubber tube level is tied up on drawing machine pillar.
Described platinized platinum is connected to auxiliary electrode interface, and stress loading test specimen is connected to working electrode interface, and contrast electrode is connected to contrast electrode interface.
Constant plus load is constantly applied to stress loading test specimen by drawing machine gearing by described stress corrosion drawing machine.
Water and 95% ethanol two media solution is adopted in described constant temperature water bath.
Advantageous effect of the present invention is as follows:
1, stretching box is cylinder two rooms structures, mistress walks medium solution, testing liquid is put in interior room, medium solution through constant temperature water bath heating after along stretching box external chamber circulation, constantly heat is passed to interior room, be inserted with thermometer in the solution of interior room, the constant accurate control of stress corrosion (cracking) test solution between 0 DEG C to 100 DEG C can be realized, carry out the research that temperature variation affects material stress corrosion.
2, interior room height is lower than mistress, effectively can suppress interior mistress's overflow and blending, stop corrosion drawing machine when the run-off the straight of stretching box.
3, lid is drilled with multiple hole, for connecting three electrodes, can carry out galvanic corrosion and stress corrosion behavior measure simultaneously.
4, between stretching box lid and box body, space sealed membrane seals, and realizes closed environment, meets the growth demand of anaerobion in 30 DEG C of constant temperature, closed environment, and realization adds the stress corrosion (cracking) test under bacterium condition.
5, stretching box overcoat has one deck tubular cotton stay-warm case, and cotton stay-warm case two is with bungee, quick detachable, effectively can reduce heat loss.
6, water and 95% ethanol two media solution can be adopted in constant temperature water bath, can be used for heating and refrigeration test solution.
7, device can be dismantled, simple to operate, and occupation of land space is little.
Accompanying drawing explanation
Fig. 1 is the front sectional view of apparatus of the present invention.
Fig. 2 is the vertical view making stretching box in apparatus of the present invention by oneself.
Fig. 3 is the left view making stretching box in apparatus of the present invention by oneself.
In figure, device is configured to: 1, electrochemical workstation; 2, auxiliary electrode interface; 3, working electrode interface; 4, contrast electrode interface; 5, mistress; 6, interior room; 7, platinized platinum; 8, lid; 9, stress loading test specimen; 10, stretching bar; 11, sealing-plug; 12, contrast electrode; 13, salt bridge, 14, cotton stay-warm case, 15, stretching box intake-outlet, 16, rubber tube, 17, constant temperature water bath, 18, drawing machine gearing, 19, stress corrosion drawing machine, 20, auxiliary electrode socket, 21, thermometer socket, 22, stress loading test specimen lays mouth, 23, nitrogen input pipe socket, 24, contrast electrode socket, 25, carbon dioxide input pipe socket, 26, support.
Embodiment
Below in conjunction with drawings and the embodiments, patent of the present invention is described in further detail.
Embodiment
As Figure 1-3, comprise electrochemical workstation 1, stress corrosion drawing machine 19, constant temperature water bath 17 and stretching box, stretching box is fixed on stress corrosion drawing machine 19, stretching box intake-outlet 15 is communicated with by rubber tube 16 with constant temperature water bath 17, rubber tube level is tied up on drawing machine pillar, adopts water and 95% ethanol two media solution in constant temperature water bath 17; Described stretching box is two rooms structures, and mistress 5 walks medium solution, and testing liquid is put in interior room 6, is inserted with thermometer and nitrogen tube in the testing liquid of interior room; Interior room height is lower than mistress, mistress shuts on top, chamber wall has support 26, support supports lid 8, lid is drilled with multiple hole, hole comprises auxiliary electrode socket 20, thermometer socket 21, stress loading test specimen lay mouth 22, nitrogen input pipe socket 23, contrast electrode socket 24, carbon dioxide input pipe socket 25, and between lid 8 and box body, space sealed membrane seals; Stretching box overcoat has stay-warm case, and stay-warm case two is with bungee; Stress loading test specimen 9 is fixed on stretching box bottom end seal plug 11, salt bridge 13, platinized platinum 7 are arranged on lid 8 and are positioned at stress loading test specimen both sides, salt bridge 13 and positive counter stress loading specimen 9 central part of platinized platinum 7, salt bridge 13 connects contrast electrode 12, platinized platinum 7 is connected to auxiliary electrode interface 2, stress loading test specimen 9 is connected to working electrode interface 3, and contrast electrode is connected to contrast electrode interface 4.Constant plus load is constantly applied to stress loading test specimen by drawing machine gearing 18 by described stress corrosion drawing machine.
Process of the test of the present invention is as follows:
When utilizing this device to carry out stress corrosion (cracking) test under containing the condition of anaerobion, first with silica gel, stress loading test specimen 9 is fixed on stretching box bottom end seal plug 11, after silica gel is air-dry, by itself and salt bridge 13, platinized platinum 7, lid 8 puts into ultraviolet sterilization 15min in ventilating kitchen, then ventilate after processing 15min, by API nutrient culture media and Ku ' erle soil simulation solution, the ratio mixing in 1:2 in aseptic operating platform connects bacterium, to pour in stretching box in room 6 into, by salt bridge 13, platinized platinum 7 is arranged on lid 8, and cover together with lid 8 on stretching box, salt bridge 13 and platinized platinum 7 are positioned at stress loading test specimen both sides, and positive counter stress loading specimen central part, and encapsulation process is carried out to lid edge and hole place sealed membrane.Put cotton stay-warm case 14 to stretching box, more whole stretching box is fixed on stretching bar 10, thermometer and nitrogen tube are inserted in the solution of interior room, open nitrogen cylinder valve, to ensure that whole process of the test is for oxygen-free environment.With rubber tube 16, the intake-outlet of constant temperature water bath 17 is connected with stretching box intake-outlet 15, and locked with screw.The rubber tube 16 level thread of stretching box turnover water end (W.E.) is directly tied up on drawing machine pillar, in order to avoid the Action of Gravity Field of rubber tube 16 brings moment of torsion to stress loading test specimen 9, affects measurement data accuracy.Start constant temperature water bath 17 power supply, established temperature in temperature indicating meter dish after, ON cycle button, then heat up in medium solution limit, edge rubber tube 16 flows into stretching box entrance, flows out, turn back to constant temperature water bath 17 li after stretching box mistress 5 streams one week from water delivering orifice.Heat is constantly passed to interior room solution when flowing through stretching box mistress 5 by water and 95% ethanol two media solution, and solution temperature raises gradually, and after a period of time, temperature reading is stabilized in assigned scale.The medium solution that heating adopts is water, and the medium solution that refrigeration adopts is 95% ethanol, and 95% ethanol is volatile, needs often to supplement.
Then three electrodes are connected, platinized platinum 7 is connected to auxiliary electrode interface 2, stress loading test specimen 9 is connected to working electrode interface 3, contrast electrode 12 is connected to contrast electrode interface 4, then start electrochemical workstation 1 and stress corrosion drawing machine 19, open computer, click electrochemical test icon and slow-drawing stress corrosion test icon, setting test parameters, selects storing path, click start button, on-test.In solution, the continuous counter stress loading specimen 9 of aggressivity negative ion causes galvanic corrosion, simultaneously, constant plus load is constantly applied to stress loading test specimen 9 by drawing machine gearing 18 by stress corrosion drawing machine 19, stress loading test specimen 9 undergos galvanic corrosion and stress corrosion effect simultaneously, and electrochemical workstation 1 and stress corrosion drawing machine 19 record galvanic corrosion and the stress corrosion data of stress loading test specimen 9 respectively automatically.Stress corrosion (cracking) test generally needs lasting two day time, and in process of the test, the medium solution that constant temperature water bath is 17 li continues to flow through stretching box mistress 5, and heat passes to interior room solution endlessly, such that interior room solution temperature is constant maintains assigned scale.After off-test, food preservation test image, turn off electrochemical workstation 1, stress corrosion drawing machine 19 and constant temperature water bath 17 power switch, open stretching box intake-outlet 15 place screw, dismounting stretching box, constant temperature water bath 17 and rubber tube 13 are put to free time place, room 6 in cleaning stretching box, measure stress loading test specimen 9 broken piece size.
Above about specific descriptions of the present invention, be only not limited to the technical scheme described by the embodiment of the present invention for illustration of the present invention.Those of ordinary skill in the art should be appreciated that and still can modify to the present invention or equivalent replacement, to reach identical technique effect.Needs are used, all in protection scope of the present invention as long as meet.
Claims (10)
1. stress-galvanic corrosion proving installation, it is characterized in that comprising electrochemical workstation, stress corrosion drawing machine, constant temperature water bath and stretching box, stretching box is fixed on stress corrosion drawing machine, and stretching box intake-outlet is communicated with constant temperature water bath; Described stretching box is two rooms structures, and mistress walks medium solution, and testing liquid is put in interior room; Mistress shuts on top, and chamber wall has support, and support supports lid, and between lid and box body, space sealed membrane seals; Stress loading test specimen is fixed on stretching box bottom end seal beyond the Great Wall, and salt bridge, platinized platinum are arranged on lid and are positioned at stress loading test specimen both sides, and salt bridge connects contrast electrode, and platinized platinum, stress loading test specimen and contrast electrode are connected respectively to the electrode interface of electrochemical workstation.
2. stress according to claim 1-galvanic corrosion proving installation, is characterized in that described interior room height is lower than mistress.
3. stress according to claim 1-galvanic corrosion proving installation, is characterized in that described lid is drilled with multiple hole.
4. stress according to claim 1-galvanic corrosion proving installation, is characterized in that described salt bridge and platinized platinum positive counter stress loading specimen central part.
5. stress according to claim 1-galvanic corrosion proving installation, is characterized in that described stretching box overcoat has stay-warm case.
6. stress according to claim 1-galvanic corrosion proving installation, is characterized in that being inserted with thermometer and nitrogen tube in described interior room testing liquid.
7. stress according to claim 1-galvanic corrosion proving installation, it is characterized in that being communicated with by rubber tube between described constant temperature water bath and stretching box, rubber tube level is tied up on drawing machine pillar.
8. stress according to claim 1-galvanic corrosion proving installation, it is characterized in that described platinized platinum is connected to auxiliary electrode interface, stress loading test specimen is connected to working electrode interface, and contrast electrode is connected to contrast electrode interface.
9. stress according to claim 1-galvanic corrosion proving installation, is characterized in that constant plus load is constantly applied to stress loading test specimen by drawing machine gearing by described stress corrosion drawing machine.
10. stress according to claim 1-galvanic corrosion proving installation, is characterized in that adopting water and 95% ethanol two media solution in described constant temperature water bath.
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| CN201410677141.7A CN104458559B (en) | 2014-11-24 | 2014-11-24 | Stress electrochemical corrosion test device |
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| CN201410677141.7A CN104458559B (en) | 2014-11-24 | 2014-11-24 | Stress electrochemical corrosion test device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897744A (en) * | 2015-04-23 | 2015-09-09 | 中国石油大学(华东) | Metal hydrogen permeation behavior research device and method |
| CN105300874A (en) * | 2015-09-11 | 2016-02-03 | 中国民航大学 | Stress corrosion and hydrogen measuring electrochemical in-situ measurement device under slow strain speed condition |
| CN106153441A (en) * | 2016-07-26 | 2016-11-23 | 西安交通大学 | The material fracture toughness test system and method being flushed with hydrogen under environment based on controllable temperature electrochemistry |
| CN106442306A (en) * | 2016-10-19 | 2017-02-22 | 辽宁石油化工大学 | Device and method capable of realizing electrochemical corrosion test under different dissolved oxygen content conditions |
| CN106896019A (en) * | 2015-12-17 | 2017-06-27 | 中国科学院金属研究所 | A kind of stress corrosion (cracking) test circulation loop exhaust apparatus and its application method |
| CN108593537A (en) * | 2018-04-24 | 2018-09-28 | 南京工程学院 | A kind of portable metallic material tensile stress electrochemical corrosion device |
| CN108801887A (en) * | 2018-03-23 | 2018-11-13 | 上海大学 | The in-situ electrochemical test device and its method of simulated marine atmosphere corrosion environment |
| CN108982350A (en) * | 2018-09-26 | 2018-12-11 | 中国民航大学 | High temperature stress corrosive environment electrochemical testing device under the conditions of slow strain rate tension |
| CN110715848A (en) * | 2019-10-30 | 2020-01-21 | 西南石油大学 | Stress erosion corrosion experimental apparatus |
| CN111420717A (en) * | 2020-04-17 | 2020-07-17 | 中国航发北京航空材料研究院 | High-low temperature test box capable of changing temperature rapidly and used for dual-temperature-zone thermal mechanical fatigue test |
| CN111504801A (en) * | 2020-05-20 | 2020-08-07 | 西安稀有金属材料研究院有限公司 | Device and method for performing stress corrosion experiment in high-temperature liquid phase corrosion environment |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897744A (en) * | 2015-04-23 | 2015-09-09 | 中国石油大学(华东) | Metal hydrogen permeation behavior research device and method |
| CN105300874A (en) * | 2015-09-11 | 2016-02-03 | 中国民航大学 | Stress corrosion and hydrogen measuring electrochemical in-situ measurement device under slow strain speed condition |
| CN105300874B (en) * | 2015-09-11 | 2018-01-16 | 中国民航大学 | Stress corrosion and survey hydrogen electrochemical in-situ measurement device under the conditions of slow strain rate |
| CN106896019A (en) * | 2015-12-17 | 2017-06-27 | 中国科学院金属研究所 | A kind of stress corrosion (cracking) test circulation loop exhaust apparatus and its application method |
| CN106153441A (en) * | 2016-07-26 | 2016-11-23 | 西安交通大学 | The material fracture toughness test system and method being flushed with hydrogen under environment based on controllable temperature electrochemistry |
| CN106442306B (en) * | 2016-10-19 | 2023-09-01 | 辽宁石油化工大学 | Electrochemical corrosion testing device and method capable of realizing different dissolved oxygen content conditions |
| CN106442306A (en) * | 2016-10-19 | 2017-02-22 | 辽宁石油化工大学 | Device and method capable of realizing electrochemical corrosion test under different dissolved oxygen content conditions |
| CN108801887A (en) * | 2018-03-23 | 2018-11-13 | 上海大学 | The in-situ electrochemical test device and its method of simulated marine atmosphere corrosion environment |
| CN108593537A (en) * | 2018-04-24 | 2018-09-28 | 南京工程学院 | A kind of portable metallic material tensile stress electrochemical corrosion device |
| CN108982350B (en) * | 2018-09-26 | 2021-01-01 | 中国民航大学 | Electrochemical testing device for high-temperature stress corrosion environment under slow strain rate stretching condition |
| CN108982350A (en) * | 2018-09-26 | 2018-12-11 | 中国民航大学 | High temperature stress corrosive environment electrochemical testing device under the conditions of slow strain rate tension |
| CN110715848A (en) * | 2019-10-30 | 2020-01-21 | 西南石油大学 | Stress erosion corrosion experimental apparatus |
| CN111420717A (en) * | 2020-04-17 | 2020-07-17 | 中国航发北京航空材料研究院 | High-low temperature test box capable of changing temperature rapidly and used for dual-temperature-zone thermal mechanical fatigue test |
| CN111504801A (en) * | 2020-05-20 | 2020-08-07 | 西安稀有金属材料研究院有限公司 | Device and method for performing stress corrosion experiment in high-temperature liquid phase corrosion environment |
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