CN203758889U - Device applied to environment corrosion split test in wet hydrogen sulfide environment - Google Patents
Device applied to environment corrosion split test in wet hydrogen sulfide environment Download PDFInfo
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- CN203758889U CN203758889U CN201420040019.4U CN201420040019U CN203758889U CN 203758889 U CN203758889 U CN 203758889U CN 201420040019 U CN201420040019 U CN 201420040019U CN 203758889 U CN203758889 U CN 203758889U
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Abstract
The utility model discloses a device applied to an environment corrosion split test in a wet hydrogen sulfide environment, which can be used for implementing the environment corrosion split test below the temperature of 75 DEG C in a closed circulating solution environment containing hydrogen sulfide of different concentrations and mixed gas of the hydrogen sulfide. The device comprises a corrosive solution storage container, a solution circulating system, an environment corrosion split test sample chamber and an electrochemical auxiliary device. The corrosive solution storage container is mainly used for storing plenty of solution, a mixed gas connector or a mixed gas flow meter can be additionally arranged at the front end of the corrosive solution storage container so as to obtain a solution containing hydrogen sulfide or carbon dioxide of different concentrations; the solution circulating system comprises a magnetic pump, a rubber ball and a ball valve so as to realize siphoning of the front end and disconnection between the front end and the environment corrosion split test sample chamber; the environment corrosion split test sample chamber mainly comprises an electrochemical test connector and is used for sealing of a sample and circulation of the solution. The device disclosed by the utility model has the advantages of greatly reducing leakage of the hydrogen sulfide and the solution of the hydrogen sulfide, improving the safety of a tester and the environment, and being convenient to use and applicable to wide test conditions.
Description
Technical field
The utility model relates to environmental corrosion cracking field in the poisonous corrosive environments such as wet sulfuretted hydrogen, be specially environmental corrosion in a kind of wet hydrogen-sulfide environmental cracking easy device, it can realize under the sulfuretted hydrogen of airtight variable concentrations and mixed gas circulation solution environment thereof the device lower than the environmental corrosion split test of 75 DEG C.
Background technology
Petrochemical industry resource is still the energy resource supply main body of whole world industry, along with the demand of economic construction, the oil field of the corrosive environment such as sulfuretted hydrogen, carbon dioxide that contains variable concentrations is exploited, contain in a large number the crude corrosivelies such as sulfuretted hydrogen and refined solution, because making material of being on active service with this understanding etc., a variety of causes need to carry certain load, under corrosion environment, oil and gas pipes, easily there is environmental corrosion cracking in the Local Members in the equipment such as pressure vessel, and environmental corrosion cracking has very large disguise, makes it to exist great potential safety hazard.Therefore study environmental corrosion cracking (comprising corrosion fatigue and stress corrosion) mechanism and the rule in relevant corrosive medium, accumulate relevant data, for the corresponding standard of material selection construction of petrochemical unit has great practical significance.
Environmental corrosion cracking is the main mode in corrosion failure, and the environmental corrosion cracking wetting in hydrogen sulfide medium is particularly serious and responsive because of the existence of sulfuretted hydrogen, the sulfide-stress cracking of low alloy steel is the most responsive at normal temperatures, in industry member, use more with constant load instrument and stress loop, in the standard of anti-special shape environmental cracking laboratory examination in hydrogen-sulfide environmental, corresponding experimental technique and device are all specified at NACE TM0177-2005 and GB/T4157-2006 metal, device employing O type circle and sample are airtight, in the middle of long period of experiments, easily there is sulfuretted hydrogen leakage, while replacing, also easily there is sulfuretted hydrogen leakage in experimental solutions.In current constant load or stress loop experiment, multiple sulfide-stress cracking tests adopt the mode of gas serial or parallel connection, because gas circuit resistance is different or while making to carry out multiple sulfide-stress crackings test before and after gas circuit when series connection, the concentration of hydrogen sulfide in its etchant solution there are differences and affects the precision of test figure.Stress loop device is expensive, and constant load instrument equipment is difficult to buy, therefore adopt tensilometer or universal testing machine to substitute more.Except sulfide-stress cracking test, also there is corrosion fatigue in current petrochemical complex material, and in corresponding device, sample is when device moves back and forth the test specimen that above-mentioned standard provides relatively, and axial seal was easily lost efficacy, and occurred leakage.Development or improve at normal pressure, not too the environmental corrosion cracking device in the environment such as the wet sulfuretted hydrogen of high-temperature is very necessary, there is not yet the report of relevant apparatus at present both at home and abroad.
Utility model content
The purpose of this utility model is to provide the device of the environmental corrosion split test in a kind of wet hydrogen-sulfide environmental, this device can be realized normal pressure, the low cost simple device of the aggressive atmosphere environmental corrosion cracking experiment such as (25-75 DEG C) wet sulfuretted hydrogen under high-temperature not too, this device can be controlled experimental temperature more accurately, control corrosive gas and electro-chemical test in corrosive medium, for the environmental corrosion split test of research petrochemical complex material in the aggressive atmospheres such as wet sulfuretted hydrogen provides condition.
The technical solution of the utility model is:
Environmental corrosion split test device in a kind of wet hydrogen-sulfide environmental, comprise that etchant solution storage follows container and sample chamber, etchant solution storage follows container and is connected by silicone tube with sample chamber, one end of silicone tube is stretched into storage and is followed in container, and the other end of silicone tube stretches in sample chamber from bottom, sample chamber; On described silicone tube, be provided with successively ball valve, threeway and magnetic drive pump, threeway connects rubber ball; The storage of described etchant solution follows container by water-bath control solution temperature in it, the bottle mouth position that etchant solution storage follows container is sealed by rubber plug I, and draft tube, escape pipe, return pipe and thermometer stretch into the storage of etchant solution etchant solution through rubber plug I and follow in container; Described sample chamber is rectangular parallelepiped hollow structure, test specimen through the upper and lower surface of sample chamber and its two ends outside sample chamber.
It is wide-mouth vial that described etchant solution storage follows container, and etchant solution storage follows the etchant solution for wet hydrogen-sulfide environmental and mixed gas thereof under normal pressure, temperature 25-75 DEG C condition in container; Its material of described sample chamber is organic glass.
Described silicone tube stretches into etchant solution storage and follows the bottom of container, and solution top in container is followed in etchant solution storage in one end of return pipe, and the other end of return pipe stretches in sample chamber from the upper surface of sample chamber.
Draft tube stretches into etchant solution storage follows the bottom of container, escape pipe stretch into that etchant solution storage follows in container but its end above solution; Described thermometer stretches in solution.Described escape pipe connects exhaust-gas treatment bottle, and draft tube connects gas cylinder.
Described magnetic drive pump adopts tetrafluoro or engineering plastics magnetic drive pump, and magnetic force delivery side of pump liquid level is at least lower than liquid level of solution 5cm, and the flow control of magnetic drive pump is in 15L/min left and right.
Between described test specimen and sample chamber, seal by the rubber plug II arranging in the upper and lower surface of sample chamber, the outside surface of the rubber plug II arranging on sample chamber is provided with corrosion resistant plate.Realize fixing between the corrosion resistant plate of above and below, sample chamber by fastening bolt.Being bolted on tensile axis of test specimen upper end.
As carry out electrochemical test, can need in sample chamber, insert platinum plate electrode and salt bridge according to experiment.
The utility model design concept is as follows:
Environmental corrosion cracking easy device in the wet hydrogen-sulfide environmental of the utility model is provided with etchant solution storage and follows container, solution recycle system, environmental corrosion split test sample chamber and galvanochemistry servicing unit and temperature control equipment.The environmental corrosion split test sample chamber of this device is that organic glass is made, and the etchant solution of wet hydrogen-sulfide environmental and mixed gas thereof is normal pressure, temperature 25-75 DEG C.Etchant solution container is that glass container can store a large amount of saturated sulfuretted hydrogen or mixed gas solution, realizes the stable of temperature and solution, and water-bath heated solution is realized the temperature control of solution, and the thermometer in solution bottle is realized the measurement of solution actual temperature.
Solution recycle system adopts tetrafluoro or the circulation of engineering plastics magnetic drive pump, adopts ball valve control while leading to environmental corrosion split test sample chamber.Form because the solution container adopting and the circulation system and environmental corrosion split test sample chamber are insulating material, therefore increase electro-chemical test port in upper surface, sample chamber, to realize electro-chemical test.Magnetic drive pump does not have self-suction function, is meeting under airtight condition, increases threeway and connects a rubber sphere, to realize solution siphon between ball valve and magnetic drive pump.
On the rubber plug of the two ends of load sample, increase a pair of corrosion resistant plate, two ends adopt fastening bolt to be fixedly clamped, the effective sealing can realize sample and rubber plug relative motion time.Its gas feed can be connected with gas meter, also can be connected the requirement that realizes variable concentrations with mixing gas cylinder.
The utility model compared with prior art tool has the following advantages:
1, the utility model is with organic glass, silicone tube, and wide-mouth vial is material and other anti-corrosion servicing units, makes simple and conveniently, with low cost, good looking appearance, can simplify experimentation and save cost.
2, solution container of the present utility model can be contained tank solution, can implement multiple tests in the series connection of multiple sample chambers simultaneously, adopt solution series can effectively reduce the impact of solution concentration on test, reduce the error of test figure, and be conducive to realize the temperature stabilization of etchant solution in closed circulation, for condition has been created in the test of research environment corrosion cracking.
3, solution chamber of the present utility model measures gas flow by flowmeter, can conveniently control the content in the corrosive environments such as wet sulfuretted hydrogen in etchant solution, for condition has been created in the corrosion research of different condition, and cost-saving, make simple.
4, small volume of the present utility model, in conjunction with the water bath with thermostatic control experimental temperature of control simulation solution comparatively accurately, can realize lower than 75 DEG C, in sample chamber, increase galvanochemistry servicing unit, can easily realize galvanochemistry Fast Evaluation and the test of respective electrical chemical data, experimentation is very convenient.
Brief description of the drawings
Fig. 1 is the environmental corrosion cracking easy device overview in wet hydrogen-sulfide environmental;
Fig. 2 is the plug layout in Fig. 1;
Fig. 3 is the A-A sectional view of the sample chamber of the environmental corrosion cracking easy device in wet hydrogen-sulfide environmental;
In figure: 1-water-bath; The storage of 2-etchant solution follows container; 3-return pipe; 4-escape pipe; 5-thermometer; 6-draft tube; 7-water delivering orifice; 8-rubber plug I; 9-silicone tube; 10-magnetic drive pump; 11-rubber ball; 12-threeway; 13-ball valve; 14-gas outlet; 15-sample chamber; 16-corrosion resistant plate; 17-platinum plate electrode; 18-salt bridge; 19-rubber plug II; 20-test specimen; 21-rubber plug III; 22-fastening bolt; 23-thermometer socket; 31-storage follows chamber water return outlet; 61-air intake opening.
Embodiment
As Figure 1-3, environmental corrosion split test in the wet hydrogen-sulfide environmental of the utility model comprises that with device etchant solution storage follows container 2 and sample chamber 15, etchant solution storage follows container 2 and is connected by silicone tube 15 with sample chamber 15, one end of silicone tube 9 is stretched into etchant solution storage and is followed in container 2, and the other end stretches in sample chamber from bottom, sample chamber; On described silicone tube 9, be provided with successively ball valve 13, threeway 12 and magnetic drive pump 10, threeway 12 connects rubber ball 11; Described etchant solution storage follows container 2 for wide-mouth vial, control solution temperature in it by water-bath 1, the bottle mouth position that etchant solution storage follows container 2 is sealed by rubber plug I 8, and draft tube 6, escape pipe 4, return pipe 3 and thermometer 5 stretch into etchant solution storage through rubber plug I 8 and follow in container 2; Described sample chamber 15 is rectangular parallelepiped hollow structure, and its material is organic glass, test specimen 20 through the upper and lower surface of sample chamber 15 and its two ends outside sample chamber 15.Described magnetic drive pump adopts tetrafluoro or engineering plastics magnetic drive pump, and magnetic force delivery side of pump liquid level is at least followed the interior liquid level of solution 5cm of container 2 lower than etchant solution storage, and the flow control of magnetic drive pump is in 15L/min left and right.
Etchant solution touches position by organic glass, engineering plastics, and silicone tube etc. insulation corrosion resistant material forms, and can carry out normal pressure, lower than the related experiment under 75 DEG C of (generally lower than 65 DEG C) conditions.
Etchant solution storage follows container 2 and can contain the above solution of 2.5L, specifically determined flexibly by the cycle of being tested and corrosivity, silicone tube 9 inserts etchant solution storage by the water delivering orifice 14 in rubber plug I 8 and follows the bottom of container (being wide-mouth vial) 2, and one end of return pipe 3 follows container water return outlet 31 by the storage in rubber plug I 8 and stretch to solution top, the other end of return pipe 3 stretches in sample chamber 15 from the upper surface of sample chamber 15; Draft tube 6 stretches in solution by the air intake opening 61 in rubber plug I 8, the position of stretching into is on the whole suitable with the position of silicone tube 9,4 of escape pipes stretch into storage by the gas outlet 14 in rubber plug I 8 and follow in container 2 and in solution top, can determine like this content and the corrosivity thereof of the corrosive gas such as oxygen content and sulfuretted hydrogen of etchant solution medium.Described thermometer 5 stretches in solution by the thermometer socket 23 in rubber plug I 8.The external exhaust-gas treatment bottle of described escape pipe 4, the external gas cylinder of draft tube 6.
Described magnetic drive pump adopts tetrafluoro or engineering plastics magnetic drive pump, and the exit liquid level of magnetic drive pump is at least lower than liquid level of solution 2cm, and silicone tube leads to sample chamber and set up ball valve and rubber sphere, so that siphon, the flow velocity of magnetic drive pump is controlled at 15L/min left and right as far as possible.
Between described test specimen 20 and sample chamber 15, seal by the rubber plug II 19 arranging in the upper and lower surface in sample chamber 15, the outside surface of the rubber plug II 19 arranging on sample chamber 15 is provided with corrosion resistant plate 16.Realize fixing between the 15 above and below corrosion resistant plates 16 of sample chamber by fastening bolt 22.Being bolted on tensile axis of test specimen 20 upper ends.
Carrying out constant load, cyclic loading, slow strain etc. is first about to sample lower end of the bolt and fixes, after successively the corrosion resistant plate of below 16, rubber plug II 19, sample chamber 15 are installed after, after the corrosion resistant plate 16 of the rubber plug II 19 of upper end, top is installed, again two corrosion resistant plates 16 of upper and lower are fixed by bolts at two ends, then the upper end of sample is bolted to upper tensile axis.Complete after sample installation in the intake-outlet connection of sample chamber 15.If desired increase electrochemical test, after needing rubber plug III 21 to open, insert corresponding platinum plate electrode 17 and salt bridge 18.
By complete all pipeline connections, ball valve is closed, pour corresponding solution into etchant solution storage and follow container, by corresponding the Temperature Setting of water-bath temperature, connect corresponding gas cylinder and tail gas receiving trap, after whether deoxygenation as requested, then be filled with the gas of corresponding proportion.
Embodiment 1:
In the present embodiment, installing after corresponding sample, in etchant solution storage follows container, pouring 2L NACE A solution (5wt%NaCl+0.5wt%HAc) into, is 24 DEG C by water-bath design temperature, closes ball valve, passes into 100-200ml/min N
2within two hours, to remove the dissolved oxygen DO in solution, the rear speed of taking 200ml/min according to testing requirements is filled with H in solution
2s, by pinching rubber ball, made magnetic drive pump be full of solution after two hours, opened ball valve, started magnetic drive pump, checked after leakproofness, opened test accordingly.
Claims (9)
1. the environmental corrosion split test device in a wet hydrogen-sulfide environmental, it is characterized in that: this device comprises that etchant solution storage follows container (2) and sample chamber (15), etchant solution storage follows container (2) and is connected by silicone tube (9) with sample chamber (15), one end of silicone tube (9) is stretched into etchant solution storage and is followed in container (2), and the other end of silicone tube (9) stretches in sample chamber from bottom, sample chamber; On described silicone tube (9), be provided with successively ball valve (13), threeway (12) and magnetic drive pump (10), threeway (12) connects rubber ball (11); Described etchant solution storage follows container (2) and controls solution temperature in it by water-bath (1), the bottle mouth position that etchant solution storage follows container (2) is sealed by rubber plug I (8), and draft tube (6), escape pipe (4), return pipe (3) and thermometer (5) stretch into etchant solution storage through rubber plug I (8) and follow in container (2); Described sample chamber (15) is rectangular parallelepiped hollow structure, test specimen (20) through the upper and lower surface of sample chamber (15) and its two ends outside sample chamber (15).
2. the environmental corrosion split test device in wet hydrogen-sulfide environmental according to claim 1, it is characterized in that: it is wide-mouth vial that described etchant solution storage follows container (2), etchant solution storage follows the etchant solution for wet hydrogen-sulfide environmental and mixed gas thereof under normal pressure, temperature 25-75 DEG C condition in container (2); Its material of described sample chamber (15) is organic glass.
3. the environmental corrosion split test device in wet hydrogen-sulfide environmental according to claim 1, it is characterized in that: described silicone tube (9) stretches into etchant solution and stores up the bottom of following container (2), solution top in container (2) is followed in etchant solution storage in one end of return pipe (3), and the other end of return pipe (3) stretches in sample chamber (15) from the upper surface of sample chamber (15); Draft tube (6) stretches into etchant solution storage follows the bottom of container (2), escape pipe (4) stretch into that etchant solution storage follows in container (2) but its end above solution; Described thermometer (5) stretches in solution.
4. the environmental corrosion split test device in wet hydrogen-sulfide environmental according to claim 1, is characterized in that: described escape pipe (4) connects exhaust-gas treatment bottle, draft tube (6) connects gas cylinder.
5. the environmental corrosion split test device in wet hydrogen-sulfide environmental according to claim 1, it is characterized in that: described magnetic drive pump adopts tetrafluoro or engineering plastics magnetic drive pump, magnetic force delivery side of pump liquid level is at least lower than liquid level of solution 2cm, and the flow control of magnetic drive pump is in 15L/min left and right.
6. the environmental corrosion split test device in wet hydrogen-sulfide environmental according to claim 1, it is characterized in that: between described test specimen (20) and sample chamber (15), seal by the rubber plug II (19) arranging in the upper and lower surface in sample chamber (15), the outside surface of sample chamber (15) upper rubber plug II (19) arranging is provided with corrosion resistant plate (16).
7. the environmental corrosion split test device in wet hydrogen-sulfide environmental according to claim 6, is characterized in that: realize fixing between sample chamber (15) above and below corrosion resistant plate (16) by fastening bolt (22).
8. the environmental corrosion split test device in wet hydrogen-sulfide environmental according to claim 1, is characterized in that: being bolted on tensile axis of test specimen (20) upper end.
9. the environmental corrosion split test device in wet hydrogen-sulfide environmental according to claim 1, it is characterized in that: as carry out electrochemical test, can need in sample chamber (15), insert platinum plate electrode (17) and salt bridge (18) according to experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420040019.4U CN203758889U (en) | 2014-01-21 | 2014-01-21 | Device applied to environment corrosion split test in wet hydrogen sulfide environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420040019.4U CN203758889U (en) | 2014-01-21 | 2014-01-21 | Device applied to environment corrosion split test in wet hydrogen sulfide environment |
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| CN203758889U true CN203758889U (en) | 2014-08-06 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104458559A (en) * | 2014-11-24 | 2015-03-25 | 辽宁石油化工大学 | Device capable of testing stress-electrochemical corrosion |
| CN104792689A (en) * | 2014-01-21 | 2015-07-22 | 中国科学院金属研究所 | Apparatus for environment corrosion cracking test in wet hydrogen sulfide environment |
| CN104807711A (en) * | 2015-04-21 | 2015-07-29 | 中信重工机械股份有限公司 | Corrosion fatigue test device |
| CN104964911A (en) * | 2015-06-10 | 2015-10-07 | 合肥通用机械研究院 | Corrosion fatigue test apparatus in wet hydrogen sulfide environment, and test method thereof |
| CN108982187A (en) * | 2018-09-07 | 2018-12-11 | 中国石油天然气集团有限公司 | A kind of gas shield sulphur coating unit and its coating method |
| CN110726660A (en) * | 2019-05-21 | 2020-01-24 | 中国船舶重工集团公司第七二五研究所 | Device and method for on-site preservation of corrosion failure state of deep sea environment test material and application |
| CN112834332A (en) * | 2020-12-29 | 2021-05-25 | 江苏容大材料腐蚀检验有限公司 | Loading detection method and monitoring system for sulfide stress corrosion uniaxial tensile test |
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- 2014-01-21 CN CN201420040019.4U patent/CN203758889U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792689A (en) * | 2014-01-21 | 2015-07-22 | 中国科学院金属研究所 | Apparatus for environment corrosion cracking test in wet hydrogen sulfide environment |
| CN104792689B (en) * | 2014-01-21 | 2018-02-23 | 中国科学院金属研究所 | A kind of environmental corrosion split test device in wet hydrogen sulfide environment |
| CN104458559A (en) * | 2014-11-24 | 2015-03-25 | 辽宁石油化工大学 | Device capable of testing stress-electrochemical corrosion |
| CN104458559B (en) * | 2014-11-24 | 2017-12-19 | 辽宁石油化工大学 | Stress electrochemical corrosion test device |
| CN104807711A (en) * | 2015-04-21 | 2015-07-29 | 中信重工机械股份有限公司 | Corrosion fatigue test device |
| CN104964911A (en) * | 2015-06-10 | 2015-10-07 | 合肥通用机械研究院 | Corrosion fatigue test apparatus in wet hydrogen sulfide environment, and test method thereof |
| CN104964911B (en) * | 2015-06-10 | 2018-11-02 | 合肥通用机械研究院有限公司 | A kind of corrosion fatigue test apparatus under wet hydrogen sulfide environment and its test method |
| CN108982187A (en) * | 2018-09-07 | 2018-12-11 | 中国石油天然气集团有限公司 | A kind of gas shield sulphur coating unit and its coating method |
| CN108982187B (en) * | 2018-09-07 | 2024-01-30 | 中国石油天然气集团有限公司 | Gas protection sulfur coating device and coating method thereof |
| CN110726660A (en) * | 2019-05-21 | 2020-01-24 | 中国船舶重工集团公司第七二五研究所 | Device and method for on-site preservation of corrosion failure state of deep sea environment test material and application |
| CN110726660B (en) * | 2019-05-21 | 2021-12-21 | 中国船舶重工集团公司第七二五研究所 | Device and method for on-site preservation of corrosion failure state of deep sea environment test material and application |
| CN112834332A (en) * | 2020-12-29 | 2021-05-25 | 江苏容大材料腐蚀检验有限公司 | Loading detection method and monitoring system for sulfide stress corrosion uniaxial tensile test |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20190121 |
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| CF01 | Termination of patent right due to non-payment of annual fee |