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CN208736825U - For the experiment device for couple corrosion under high temperature and high pressure environment - Google Patents

For the experiment device for couple corrosion under high temperature and high pressure environment Download PDF

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Publication number
CN208736825U
CN208736825U CN201821454809.1U CN201821454809U CN208736825U CN 208736825 U CN208736825 U CN 208736825U CN 201821454809 U CN201821454809 U CN 201821454809U CN 208736825 U CN208736825 U CN 208736825U
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CN
China
Prior art keywords
connector
high temperature
high pressure
pressure environment
experiment device
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Withdrawn - After Issue
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CN201821454809.1U
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Chinese (zh)
Inventor
李大朋
王毛毛
张雷
王亚文
王修云
路民旭
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Bianco Research Institute Of Engineering Technology (beijing) Co Ltd
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Bianco Research Institute Of Engineering Technology (beijing) Co Ltd
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Abstract

The utility model discloses a kind of experiment device for couple corrosion under high temperature and high pressure environment, it includes the connector in cannula-like, the lower end of connector is located in external cap, at least two metallic sheaths are set on the lower end outer wall of connector, insulating sleeve is equipped between two adjacent metallic sheaths, metallic sheath is equipped with radial screw bore and axial threaded hole, offers at least two strip through-holes on the wall surface of connector lower end, wire clamp is connected in the radial screw bore of metallic sheath, wire clamp is for connecting working electrode.Its purpose is to provide a kind of experiment device for couple corrosion under high temperature and high pressure environment, it is poor to solve existing measuring technology leakproofness, safety, and cause test result accuracy poor because three-electrode system installation site is unstable, experimental error problem not easy to control realizes the function under the conditions of high temperature and high pressure condition using electrochemical method and weight-loss method progress metal material galvanic corrosion test.

Description

For the experiment device for couple corrosion under high temperature and high pressure environment
Technical field
The utility model belongs to field of test instrument, is related to metal material galvanic corrosion sensitivity tests, in particular to and one The electrode system device of galvanic corrosion sensitivity assessment under kind high temperature and high pressure environment.
Background technique
With the deep development of domestic and international oil gas field, the Service Environment of down-hole string and ground oil-gas facility is increasingly harsh, Corrosion failure problem takes place frequently.Especially when the metal of unlike material contacts with each other, if current potential difference is larger, electricity will occur Thermogalvanic corrision, so that the lower metal material accelerated corrosion of current potential, fails.Therefore, when carrying out selection design, for existing The metal of two kinds of unlike materials of contact needs when carbon steel and stainless steel or nickel-base alloy contact especially under high temperature and pressure Its galvanic corrosion risk is evaluated.When carrying out galvanic corrosion sensitivity assessment, metal material is tested using electrochemical method The galvanic corrosion feature of material is to study its corrosion behavior and the indispensable experimental method and means of mechanism, it can both make to study By polarization current on electrode interface, and the control and measurement of the electrode potential of Electrode are not interfered, can be realized simultaneously pair The control and measurement of electric current and potential.Currently, the galvanizing corrosion test method provided in standard, document and patent, general only suitable It is also relatively fewer for the introduction of the galvanizing corrosion test method under high temperature and high pressure environment for normal temperature and pressure environment.To meet Galvanic corrosion electro-chemical test and the requirement of immersion corrosion simulation test under harsh environmental conditions, are badly in need of a kind of for high temperature and pressure Under the conditions of galvanic corrosion sensitivity assessment electrode system device.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of galvanizing corrosion tests under high temperature and high pressure environment It is poor to solve existing measuring technology leakproofness, safety for device, and causes test to be tied because three-electrode system installation site is unstable Fruit accuracy is poor, experimental error problem not easy to control, utilizes electrochemical method and weightlessness under the conditions of realization high temperature and high pressure condition The function of method progress metal material galvanic corrosion test.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, the connector including being in cannula-like, institute The lower end for stating connector is located in external cap made of isolation material, the connector and the external cap fixed seal connection, described It is set at least two metallic sheaths on the lower end outer wall of connector, insulating sleeve is equipped between two adjacent metallic sheaths, it is described The outer wall of metallic sheath is equipped with radial screw bore, and the end face of the metallic sheath is equipped with axial threaded hole, the connector lower end At least two strip through-holes are offered on wall surface, the strip through-hole is identical as the quantity of the metallic sheath, the axis on metallic sheath It is arranged in a one-to-one correspondence to threaded hole and strip through-hole, wire clamp is connected in the radial screw bore of the metallic sheath, the wire clamp is worn It crosses external cap and is equipped with sealing element between external cap, the wire clamp is for connecting working electrode.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the tube wall of the upper end of joint Thickness is greater than the pipe thickness of lower end, and the upper end outer tube wall of the connector is equipped with first flange disk, the opening of the external cap Place is equipped with second flange disk, and the connector and the external cap are bolted by first flange disk and second flange disk.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the upper end of the connector and institute State O-ring seal there are two setting between external cap.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the metallic sheath is copper sheathing, The quantity of the copper sheathing is set as three, and the strip through-hole is also set as three.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the end of the connector lower end It is threaded with interior back of the body cap made of an isolation material out.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the end of the wire clamp connects There is fastening bolt, the wire clamp connects working electrode by fastening bolt.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the wire clamp and the outer back Sealing element between cap is O-ring seal.
The utility model be used for high temperature and high pressure environment under experiment device for couple corrosion, wherein the external cap, insulation every Material from set and interior back of the body cap is polytetrafluoroethylene (PTFE).
The experiment device for couple corrosion difference from prior art that the utility model is used under high temperature and high pressure environment is The connector is connect by NPT screw thread with high-temperature high-voltage reaction container, and conductive column is connected by metallic sheath and wire clamp and working electrode It connects, experimental provision realizes sealing by related seals circle, and realizes different operating electrode by inside and outside back of the body cap and insulating sleeve Between and working electrode and reaction vessel between be electrically insulated.Match with the reaction vessel that can satisfy high temperature and pressure experiment operating condition It closes and uses, high temperature pressure corrosion simulated experiment can be carried out.The utility model is by the electrical connection to working electrode and tests dress The leakproofness set is designed so that design device can satisfy under high temperature and high pressure environment the basic demand of galvanizing corrosion test with Leakproofness.Meanwhile using means of testing such as electro-chemical test, corrosion weight losses, carries out metal material galvanic corrosion sensibility and comment Valence test.The experimental rig has install convenient, and leakproofness is good, the true and reliable advantage of experimental result.
The utility model is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the utility model for the experiment device for couple corrosion and high-temperature high-voltage reaction container under high temperature and high pressure environment Assembling schematic diagram;
Fig. 2 is structural schematic diagram of the utility model for the experiment device for couple corrosion under high temperature and high pressure environment;
Fig. 3 is the cross-sectional view of the line A-A along Fig. 2;
Fig. 4 is perspective view of the utility model for the experiment device for couple corrosion under high temperature and high pressure environment;
Fig. 5 is the structural schematic diagram of the utility model center tap;
Fig. 6 is the cross-sectional view of the line B-B along Fig. 5;
Fig. 7 is the perspective view of the utility model center tap;
Fig. 8 is the structural schematic diagram of external cap in the utility model;
Fig. 9 is the cross-sectional view of the line C-C along Fig. 8;
Figure 10 is the perspective view of external cap in the utility model;
Figure 11 is the perspective view of metallic sheath in the utility model;
Figure 12 is the structural schematic diagram of insulating sleeve in the utility model;
Figure 13 is the cross-sectional view of the line D-D along Figure 12;
Figure 14 is the perspective view of insulating sleeve in the utility model;
Figure 15 is the structural schematic diagram of wire clamp in the utility model.
Specific embodiment
As shown in Fig. 2, and combine Fig. 3-11 shown in, the utility model be used for high temperature and high pressure environment under galvanizing corrosion test Device, the connector 2 including being in cannula-like, the lower end of the connector 2 are located in external cap 10 made of isolation material, the connector 2 with 10 fixed seal connection of external cap, be set at least two metallic sheaths 6 on the lower end outer wall of the connector 2, it is adjacent Insulating sleeve 8 is equipped between two metallic sheaths 6, the outer wall of the metallic sheath 6 is equipped with radial screw bore, the metallic sheath 6 End face be equipped with axial threaded hole, at least two strip through-holes are offered on the wall surface of 2 lower end of connector, the bar shaped is logical Hole is identical as the quantity of the metallic sheath 6, and the axial threaded hole on metallic sheath 6 is arranged in a one-to-one correspondence with strip through-hole, the gold Belong to and be connected with wire clamp 5 in the radial screw bore of set 6, the wire clamp 5 is equipped with sealing across external cap 10 and external cap 10 Part, the wire clamp 5 is for connecting working electrode.
The external cap 10 is cylindrical in shape, and the bottom of external cap 10 is equipped with bottom wall, and the upper end of external cap 10 is opening.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the pipe of 2 upper end of the connector Wall thickness is greater than the pipe thickness of lower end, and the upper end outer tube wall of the connector 2 is equipped with first flange disk, the external cap 10 Opening is equipped with second flange disk, and the connector 2 and the external cap 10 are tethered by first flange disk and second flange valve snail It connects.It is connected by fastening bolt 4, enhances stability.
The utility model be used for high temperature and high pressure environment under experiment device for couple corrosion, wherein the upper end of the connector 2 with O-ring seal 3 there are two being set between the external cap 10.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the metallic sheath 6 is copper sheathing, The quantity of the copper sheathing is set as three, and the strip through-hole is also set as three.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the end of 2 lower end of the connector Head, which goes out, is threaded with interior back of the body cap 9 made of an isolation material.As shown in figure 12, and in conjunction with shown in Figure 13,14, the interior back of the body cap 9 be sleeve-shaped, and the inner tube wall of interior back of the body cap 9 is equipped with screw thread, and outer tube wall is equipped with a radial boss, which is used to support Fixed metallic sheath 6.
As shown in figure 15, the wire clamp 5 is strip structure, and the end of the wire clamp 5 is connected with fastening bolt 4, the line Folder 5 connects working electrode by fastening bolt 4.In the present embodiment, wire clamp is elongated cylinder, naturally it is also possible to be other shapes Shape, as cross section is square, the strip structure of rectangle and ellipse.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the wire clamp 5 and described outer Sealing element between back of the body cap 10 is O-ring seal 3.
The utility model is used for the experiment device for couple corrosion under high temperature and high pressure environment, wherein the external cap 10, insulation The material of separation sleeve 8 and interior back of the body cap 9 is polytetrafluoroethylene (PTFE).
The connector 2 is connect by NPT screw thread with high-temperature high-voltage reaction container, and conductive column 1 passes through metallic sheath 6 and wire clamp 5 It is connect with working electrode, experimental provision realizes sealing by related seals circle, and passes through inside and outside back of the body cap 10 and insulating sleeve 8 Realize being electrically insulated between different operating electrode and between working electrode and reaction vessel.With can satisfy high temperature and pressure experiment The reaction vessel of operating condition is used cooperatively, and can carry out high temperature pressure corrosion simulated experiment.The utility model passes through to working electrode Electrical connection and the leakproofness of experimental provision be designed so that design device can satisfy galvanic corrosion under high temperature and high pressure environment The basic demand and leakproofness of test.Meanwhile using means of testing such as electro-chemical test, corrosion weight losses, carry out metal material The test of galvanic corrosion sensitivity assessment.The experimental rig has install convenient, and leakproofness is good, and experimental result is true and reliable Advantage.
The utility model provides a kind of electrode system dress for galvanic corrosion sensitivity assessment under high temperature and high pressure environment It sets.The utility model in conjunction with corresponding reaction vessel, can it is more accurate, efficiently and conveniently test simulation high temperature and pressure is practical The galvanic corrosion electrochemical behavior feature and weightlessness of metal material, reappear corrosion process under operating condition, evaluation analysis corrosion Sensitive question, and constructive suggestions or suggestion are proposed to selection from now on and concrete application.The utility model accuracy is high, experiment It is high-efficient, install convenient is tested, and safety is reliable, it is most important that the test under the conditions of high temperature and high pressure environment can be met.
As shown in Figure 1, the utility model combines the reaction vessel that can satisfy high temperature and pressure experiment operating condition, high temperature can be carried out The corrosion simulated experiment of high pressure.Using a variety of means of testing such as electro-chemical test, corrosion weight loss, to the galvanic corrosion of metal material Sensibility carries out evaluation Journal of Sex Research, carries out research and analysis to specific corrosion behavior and corrosion cause, is later selection And the application under actual condition provides reference.
As shown in Figure 1, metal material involved in the utility model should meet the corrosion resistance requirement of experiment condition.Such as Containing CO2Environment, metal material can select 316L material to meet corrosion resistance requirement, and for containing H2The acidic environment of S, metal Material, which can be selected using C276 as the abros material of representative, meets corrosion resistance requirement;Involved in the utility model Nonmetallic materials should meet the high temperature resistant and anti-aging property requirement of experiment condition.In addition, structure involved in the utility model The weak link of design should meet the resistance to pressure request of experiment condition.
Conductive column 1 is connected with working electrode and realizes electrical connection by the copper sheathing and wire clamp 5.The copper sheathing passes through radial spiral shell Pit connects the wire clamp 5, and the copper sheathing connects the conductive column 1 by axial threaded hole, realizes electrical connection.Conductive column 1 exists It connect that detailed process is as follows with axial threaded hole: when copper sheathing is sleeved on connector lower end 7, making the axial screw of copper sheathing Pitpair should be at the strip through-hole of connector lower end 7, and conductive column 1 walks downward along the inner tube wall of connector 2, logical across bar shaped later It is connected to behind hole in the axial threaded hole of copper sheathing.The copper sheathing is fixed on described connect by interior back of the body cap 9 with the insulating sleeve 8 The outer wall of head lower end 7.The wire clamp 5 includes at least: band notch cylindrical rod, threaded hole, fastening spiral shell for installing, fixing electrode Bolt 4, fluororubber O-type sealing ring;Being threaded on copper sheathing by one end with notch cylindrical rod, and it is provided with fluorubber O-ring seal is sealed with external cap 10;It is described to pass through the fastening bolt 4 and the conducting wire on sample 12 with notch cylindrical rod 11 connections.
Using external cap 10, insulating sleeve 8, interior back of the body cap 9 and make between different operating electrode and working electrode and high temperature Electrical isolation is realized in connection between high-pressure reaction vessel.
The application method of the utility model embodiment is as follows:
Assemble experimental provision according to Fig. 1, open the upper cover of high-temperature high-voltage reaction container matched with connector 2, upper cover and It is sealed between vessel also by sealing ring, connector 2 is mounted on experiment container on lid.Conductive column 1 is passed through experiment to hold Device upper cover centre bore, leads to connector lower end 7.It is distributed alternately using the insulating sleeve 8 with copper sheathing and is placed on the outer of connector lower end 7 Wall, the back of the body cap 9 in 7 end of connector lower end is installed, insulating sleeve 8 is fixed with copper sheathing to realize.Conductive column 1 is adjusted It is whole to appropriate location, be allowed to be fixed by means respectively of the connection of each copper sheathing and 5 end of thread of wire clamp;Then spiral shell will be fastened Bolt 4 is connected with the one end with threaded hole of wire clamp 5, and respective electrode is fixed in fastening bolt 4, constitutes connecting path by wire clamp 5, The working electrode introduced in conductive column 1 and test chamber is set to be in connected state.Later, external cap 10 is placed on copper sheathing and insulation It on 8 outer wall of separation sleeve, is connect by four fastening bolts 4 with 2 upper cover of connector, is kept under connector 2 using double-layer seal rings 3 Leakproofness may make up the electrode system device of galvanic corrosion sensitivity assessment under high-temperature and high-pressure conditions.Remaining operation and connection It is consistent with Conventional electrochemical test process.It is required that least significant end of the testing liquid no more than the system device.
Before experiment, using nitrogen (N2) to the electrode system device of galvanic corrosion sensitivity assessment under high-temperature and high-pressure conditions It hunts leak, if discovery gas leak phenomenon, fastens drain-source and adjusted;If air-tightness is good, the body is connected using meter Be conductor wire end inside and outside device experiment container, detection even electric conductivity it is whether normal, if normally, respectively by galvanic corrosion sample 12 with The device, is then fixed in the electro-chemical test equipment to match and experiment container by conductor connection, and it is quick to prepare galvanic corrosion Perceptual evaluation experimental.
In addition, the utility model has efficiently controlled generated error when the installation of traditional electrode system device is fixed, make The availability of data result greatly improves;Simultaneously the electrode system as a whole, the device of space-closed, with the external world Isolation, only relies on conductor and is connected to, and avoids extraneous factor influence;Suitable for the galvanic corrosion under the conditions of high temperature and high pressure environment Electro-chemical test experiment breaches the galvanic corrosion sensitivity assessment experiment that currently can only carry out under normal temperature conditions, and quasi- True property is high, and test efficiency is high, install convenient, and economic serviceability is strong etc..
Metal material involved in device should meet the corrosion resistance requirement of experiment condition.Such as containing CO2Environment, metal material Material can select 316L material to meet corrosion resistance requirement, and for containing H2The acidic environment of S, metal material can select with C276 is the abros material of representative to meet corrosion resistance requirement.In addition, nonmetallic materials involved in device should expire The high temperature resistant and anti-aging property of sufficient experiment condition require, and the weak link of the design of structure involved in device should meet experiment work The resistance to pressure request of condition.
The utility model has the beneficial effects that by being connect with reaction vessel and other electro-chemical test equipment, to sample The 12 galvanic corrosion electrochemical characteristic test under high-temperature and high-pressure conditions carries out galvanic corrosion sensibility by these features Evaluation, specific corrosion behavior and corrosion cause carry out research and analysis, and to answering under later selection and actual condition With offer reference.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines In range.

Claims (8)

1. a kind of experiment device for couple corrosion under high temperature and high pressure environment, it is characterised in that: the connector including being in cannula-like, The lower end of the connector is located in external cap made of isolation material, the connector and the external cap fixed seal connection, institute It states and is set at least two metallic sheaths on the lower end outer wall of connector, insulating sleeve, institute are equipped between two adjacent metallic sheaths The outer wall for stating metallic sheath is equipped with radial screw bore, and the end face of the metallic sheath is equipped with axial threaded hole, the connector lower end Wall surface on offer at least two strip through-holes, the strip through-hole is identical as the quantity of the metallic sheath, on metallic sheath Axial threaded hole is arranged in a one-to-one correspondence with strip through-hole, and wire clamp, the wire clamp are connected in the radial screw bore of the metallic sheath Sealing element is equipped with across external cap and external cap, the wire clamp is for connecting working electrode.
2. the experiment device for couple corrosion according to claim 1 under high temperature and high pressure environment, it is characterised in that: described The pipe thickness of upper end of joint is greater than the pipe thickness of lower end, and the upper end outer tube wall of the connector is equipped with first flange disk, institute The opening for stating external cap is equipped with second flange disk, and the connector and the external cap pass through first flange disk and second flange disk It is bolted.
3. the experiment device for couple corrosion according to claim 2 under high temperature and high pressure environment, it is characterised in that: described O-ring seal there are two being set between the upper end of connector and the external cap.
4. the experiment device for couple corrosion according to claim 3 under high temperature and high pressure environment, it is characterised in that: described Metallic sheath is copper sheathing, and the quantity of the copper sheathing is set as three, and the strip through-hole is also set as three.
5. the experiment device for couple corrosion according to claim 4 under high temperature and high pressure environment, it is characterised in that: described The end of connector lower end, which goes out, is threaded with interior back of the body cap made of an isolation material.
6. the experiment device for couple corrosion according to claim 5 under high temperature and high pressure environment, it is characterised in that: described The end of wire clamp is connected with fastening bolt, and the wire clamp connects working electrode by fastening bolt.
7. the experiment device for couple corrosion according to claim 6 under high temperature and high pressure environment, it is characterised in that: described Sealing element between wire clamp and the external cap is O-ring seal.
8. the experiment device for couple corrosion according to claim 7 under high temperature and high pressure environment, it is characterised in that: described The material of external cap, insulating sleeve and interior back of the body cap is polytetrafluoroethylene (PTFE).
CN201821454809.1U 2018-09-05 2018-09-05 For the experiment device for couple corrosion under high temperature and high pressure environment Withdrawn - After Issue CN208736825U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821454809.1U CN208736825U (en) 2018-09-05 2018-09-05 For the experiment device for couple corrosion under high temperature and high pressure environment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821454809.1U CN208736825U (en) 2018-09-05 2018-09-05 For the experiment device for couple corrosion under high temperature and high pressure environment

Publications (1)

Publication Number Publication Date
CN208736825U true CN208736825U (en) 2019-04-12

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CN201821454809.1U Withdrawn - After Issue CN208736825U (en) 2018-09-05 2018-09-05 For the experiment device for couple corrosion under high temperature and high pressure environment

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109060925A (en) * 2018-09-05 2018-12-21 安科工程技术研究院(北京)有限公司 For the experiment device for couple corrosion under high temperature and high pressure environment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109060925A (en) * 2018-09-05 2018-12-21 安科工程技术研究院(北京)有限公司 For the experiment device for couple corrosion under high temperature and high pressure environment
CN109060925B (en) * 2018-09-05 2024-02-27 安科工程技术研究院(北京)有限公司 Couple corrosion test device used in high-temperature high-pressure environment

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