CN105651682A - Soil corrosion simulation device and corrosion simulation method thereof for oil-gas pipelines - Google Patents
Soil corrosion simulation device and corrosion simulation method thereof for oil-gas pipelines Download PDFInfo
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Abstract
The invention discloses a soil corrosion simulation device and a corrosion simulation method thereof for oil-gas pipelines. The soil corrosion simulation device comprises a hermetic box body with a heat insulation layer (13), a support (5) is arranged in the box body, a soil experiment box (1) is arranged on the support and is filled with compacted soil, the upper end of the soil experiment box is provided with an opening, corrosion test pieces (2) are embedded in the soil, two symmetrically arranged titanium alloy plates (3) are mounted on the side wall of the soil experiment box and are connected in a corrosion power supply circuit, and a waveform generator and a waveform amplifier (14) for outputting nonlinear wave power source are used as a power supply source of the corrosion power supply circuit.
Description
Technical field
The present invention relates to metallic corrosion protection field, it is specifically related to a kind of corrosion simulated device of oil and gas pipes edatope and corrosion simulation method thereof.
Background technology
Material corrosion problem in edatope is not only in corrosion science research field an important problem, and is the practical problems that solution is badly in need of in underground works application. Along with the development of the development of national economy, particularly energy industry, and the propelling of development of the West Regions, also underground facilities such as having a large amount of underground pipelines, piling bar, sleeve pipe, storage tank and cable is dropped into and build and use. These underground structures Chang Yin suffers soil corrosion and stray current corrosion and construction to national economy causes huge loss, sets up, improves and the research method of development soil corrosion and stray current corrosion has important scientific meaning and economic worth. It it is the important component part in corrosion research field to the metallic corrosion Study on Problems in edatope. Due to the complicacy of soil media, all individually multifactor or interact affect soil corrosion process so that the actual corrosion behavior of metal in edatope become very complicated and be difficult to predicts.
For a long time, the Corrosion monitoring of buried oil and gas pipes is mainly by hand excavation's Site Detection, but there is the shortcomings such as engineering amount is big, cost height, easily destruction preservative coat. Especially use in urban pipe network, it more difficult to implement, and excavation test result is with certain randomness, randomness. For this reason, research and develop a kind of can the corrosion simulated device of simulated oil feed channel soil true environment and corrosion simulation method thereof, for in laboratory simulation soil corrosion and stray current corrosion experimental study, thus explore mechanism of corrosion and the means of defence of oil and gas pipes, it is problem anxious to be resolved at present.
Summary of the invention
Technical problem to be solved by this invention is that proposition is a kind of with the simulator of electric current simulated oil feed channel accelerated corrosion, i.e. the corrosion simulated device of oil and gas pipes edatope and corrosion simulation method thereof.
The present invention is achieved through the following technical solutions:
The corrosion simulated device of oil and gas pipes edatope, comprise the box body that sealed and be provided with thermal insulation layer, it is provided with support in box body, support is provided with soil water experiment box, in soil water experiment box, compacting has soil, soil water experiment box upper end open, corrosion coupon it is embedded with in soil, the sidewall of soil water experiment box is provided with 2 symmetrically arranged titanium alloy sheets, 2 titanium alloy sheets are connected in corrosion current supply circuit, and the power supply of described corrosion current supply circuit is the waveform generator and the waveform amplifier that export non-linear wave power supply. Non-linear wave comprises square wave or sinusoidal wave or cosine wave or zigzag wave or shear wave etc., namely gets rid of straight wave so that native system can study the impact that edatope is corroded corrosion coupon by different wave power supply. Different voltage, electric current, waveform, rate-adaptive pacemaker are set according to test demand, for whole corrosion test district provides power supply support. The power supply of the corrosion current supply circuit of prior art is generally direct-current switch power supply, the power supply exported is straight wave, in research corrosive environment, the change of the grade of voltage, electric current, corrosive environment is on the impact of corrosion coupon, it does not have include the impact of waveform in corrosion research. Waveform generator in waveform generator and waveform amplifier generates electric current, the current amplifying process that waveform generator is generated by waveform amplifier.
Waveform is introduced corrosion simulation test device by the present invention, in existing corrosion simulation test device patent, is all realized by direct supply to the simulation of stray current, and only corrosion is had impact by electric current, voltage. And by earthing pole field test, find that near location, pole, between soil, voltage waveform is physical presence, corrosion is had impact by shape and the size of waveform, so introducing waveform in corrosion simulation test device, there is no the corrosion testing apparatus that any open source literature describes analog DC earthing pole stray current waveform at present.
The principle of design of said structure is: structure based on soil water experiment box, in soil water experiment box, soil is set, the environment that simulated oil feed channel contacts with soil, in order to obtain accelerated corrosion effect, in soil water experiment box both sides, titanium alloy sheet is set, make soil, titanium alloy sheet forms a structure by electric current, as long as titanium alloy sheet being connected in corrosion current supply circuit, the above-mentioned structure by electric current can be made to pass through electric current, internal corrosion test piece is conducted electricity, thus reach the effect of accelerated corrosion, the current class that can arrange corrosion current supply circuit obtains the corrosion simulated experiment of different acceleration effect. and corrosion current supply circuit wherein can adopt more existing current supply circuits, it is also possible to adopt the current supply circuit designed herein below. waveform generator outward current in waveform generator and waveform amplifier, the electric current that waveform amplifier amplification process waveform generator exports.
Preferably, in order to the temperature in keeping box body, reaching the effect of environment temperature simulation, the present invention is also provided with resistive heater and blower fan, that is, be provided with resistive heater and blower fan below support, and the residing height of resistive heater is consistent with fan outlet height. When temperature exceedes valve value in box body, power to resistive heater and blower fan so that resistive heater heating, blower fan are rotated, and finally form hot blast in box body, reach temperature in environment and raise.
Preferably, in order to the humidity in keeping box body, reach the effect of environment rainfall simulation, above soil water experiment box, it is provided with rainfall pipe, rainfall pipe is provided with working shaft, at least 1 shower nozzle.
Preferably, in order to the humidity in keeping box body, reach the effect of ambient moisture simulation, when box body humidity exceedes valve value, power to adding seam humidifier so that seam humidifier plays and forms steam in box body, reach environment humidity and raise, consequently, it is desirable to be provided with seam humidifier in box body.
In order to realize control each device above-mentioned, the present invention also comprises Controlling System, and described Controlling System comprises control device, information collecting device, data transmission device, waveform generator and waveform amplifier; Control device and waveform generator and waveform amplifier, information collecting device are connected, and information collecting device is connected with data transmission device;
Electric current accelerated corrosion simulator, rainfall simulation system, temperature simulation system, humidity simulation system can be obtained by above-mentioned Controlling System;
Electric current accelerated corrosion simulator: comprise corrosion Mgs, resistor, reometer, waveform generator and waveform amplifier; Waveform generator and waveform amplifier, corrosion Mgs, resistor, reometer series connection formation corrosion current supply circuit; 2 titanium alloy sheets of soil water experiment box form corrosion target, and corrosive medium is connected in corrosion current supply circuit;
The signals collecting end of information collecting device is connected with resistor, reometer;
The control end of control device is connected with the controlled end of corrosion Mgs, the controlled end of resistor.
Waveform generator and waveform amplifier provide power supply support for whole testing apparatus comprises corrosion current supply circuit, and according to test demand, export voltage, the electric current of different wave and size by control device control.
Temperature simulation system: be provided with resistive heater and blower fan below support, the residing height of resistive heater is consistent with fan outlet height, also comprise heating Mgs, waveform generator and waveform amplifier, heating Mgs, resistive heater series connection formation heating current supply circuit;
The signals collecting end of information collecting device is connected with the temperature sensor being placed in box body;
The control end of control device is connected with the controlled end of heating Mgs.
Humidity simulation system: be provided with seam humidifier in box body, also comprises and adds wet Mgs, waveform generator and waveform amplifier, add wet Mgs, seam humidifier series connection formation add wet current supply circuit;
The signals collecting end of information collecting device is connected with the humidity sensor being placed in box body;
The control end of control device is connected with the controlled end adding wet Mgs.
Rainfall simulation system: be provided with rainfall pipe above soil water experiment box, rainfall pipe is provided with working shaft, at least 1 shower nozzle, and the control end of control device is connected with the controlled end of working shaft.
In said apparatus, information collecting device gathers the parameter of related device, the parameter of reometer, resistor, waveform generator and waveform amplifier, temperature sensor, humidity sensor can be gathered, then by data transmission device, the parameter of above-mentioned device is transferred to backstage to record, it is convenient to post analysis.
Based on the corrosion simulation method of the corrosion simulated device of oil and gas pipes edatope, comprise the following steps:
Comprise electric current accelerated corrosion simulation steps: set the voltage of power supply, electric current, waveform in corrosion current supply circuit, start corrosion current supply circuit, making electric current by the soil in 2 titanium alloy sheets, soil testing box, corrosion coupon, abrasion cycle observes the etch state of corrosion coupon after terminating.
Described corrosion simulation method, also comprises the following step of at least one:
Temperature simulation step: control device control waveform generator and waveform amplifier outward current, control device control heating Mgs closes, resistive heater generates heat, blower fan air-supply forms hot blast, box body inner air is heated, resistive heater and blower fan are arranged on below support, and the residing height of resistive heater is consistent with fan outlet height, waveform generator and waveform amplifier, heating Mgs, resistive heater series connection formation heating current supply circuit;
Humidity simulation step: control device control waveform generator and waveform amplifier outward current, control device controlling moisture Mgs closes, seam humidifier ejection steam, seam humidifier is arranged in box body, waveform generator and waveform amplifier, add wet Mgs, seam humidifier series connection formation add wet current supply circuit;
Rainfall simulation step: control device control working shaft, current are flowed into the ejection of rainfall Guan Houcong shower nozzle through working shaft, and rainfall pipe is arranged on above soil water experiment box, and working shaft is connected with rainfall pipe, and rainfall pipe is provided with at least 1 shower nozzle.
The present invention compared with prior art, has following advantage and useful effect: the function that can realize the corrosive environments such as simulated soil humiture, natural precipitation, stray current, has simple to operate, level of automation advantages of higher.
Accompanying drawing explanation
Accompanying drawing described herein be used to provide to the embodiment of the present invention it is further understood that form the application a part, do not form the restriction to the embodiment of the present invention. In the accompanying drawings:
Fig. 1 is the schematic layout pattern of each parts of the present invention.
The component title of mark and correspondence in accompanying drawing:
1, soil testing box; 2, corrosion coupon; 3, titanium alloy sheet; 4, humidity sensor; 5, support; 6, blower fan; 7, resistive heater; 8, temperature sensor; 9, rainfall pipe; 10, reometer; 11, Mgs is corroded; 111, Mgs, 112, add wet Mgs are heated; 12, resistor; 13, thermal insulation layer; 14, waveform generator and waveform amplifier; 15, data transmission device; 16, information collecting device; 17, control device; 18, seam humidifier.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only for explaining the present invention, not as a limitation of the invention.
Embodiment 1
As shown in Figure 1, the corrosion simulated device of oil and gas pipes edatope, comprise the box body that sealed and be provided with thermal insulation layer 13, support 5 it is provided with in box body, being provided with soil water experiment box 1 on support, in soil water experiment box, compacting has soil, is embedded with corrosion coupon 2 in soil, the sidewall of soil water experiment box is provided with 2 symmetrically arranged titanium alloy sheets, 3,2 titanium alloy sheets 3 and is connected in corrosion current supply circuit. The power supply of described corrosion current supply circuit is the waveform generator and the waveform amplifier 14 that export non-linear wave power supply.
The principle of design of said structure is: structure based on soil water experiment box, in soil water experiment box, soil is set, the environment that simulated oil feed channel contacts with soil, in order to obtain accelerated corrosion effect, in soil water experiment box both sides, titanium alloy sheet is set, make soil, titanium alloy sheet forms a structure by electric current, as long as titanium alloy sheet being connected in corrosion current supply circuit, the above-mentioned structure by electric current can be made to pass through electric current, internal corrosion test piece is conducted electricity, thus reach the effect of accelerated corrosion, the current class that can arrange corrosion current supply circuit obtains the corrosion simulated experiment of different acceleration effect. and corrosion current supply circuit wherein can adopt more existing current supply circuits, it is also possible to adopt the current supply circuit designed herein below.
Preferably, in order to the temperature in keeping box body, reaching the effect of environment temperature simulation, the present invention is also provided with resistive heater and blower fan, that is, be provided with resistive heater 7 and blower fan 6 below support, and the residing height of resistive heater 7 is consistent with fan outlet height. When temperature exceedes valve value in box body, power to resistive heater and blower fan so that resistive heater heating, blower fan are rotated, and finally form hot blast in box body, reach temperature in environment and raise. Preferably, in order to the humidity in keeping box body, reach the effect of environment rainfall simulation, above soil water experiment box, it is provided with rainfall pipe 9, rainfall pipe 9 is provided with working shaft, at least 1 shower nozzle.
Preferably, in order to the humidity in keeping box body, reach the effect of ambient moisture simulation, when box body humidity exceedes valve value, power to adding seam humidifier so that seam humidifier plays and forms steam in box body, reach environment humidity and raise, consequently, it is desirable to be provided with seam humidifier 8 in box body.
In order to realize control each device above-mentioned, the present invention also comprises Controlling System, and described Controlling System comprises control device 17, information collecting device 16, data transmission device 15, waveform generator and waveform amplifier 14; Control device 17 and waveform generator and waveform amplifier 14, information collecting device 16 are connected, and information collecting device 16 is connected with data transmission device 15;
Electric current accelerated corrosion simulator, rainfall simulation system, temperature simulation system, humidity simulation system can be obtained by above-mentioned Controlling System;
Electric current accelerated corrosion simulator: comprise corrosion Mgs 11, resistor 12, reometer 10, waveform generator and waveform amplifier 14; Waveform generator and waveform amplifier 14, corrosion Mgs 11, resistor 12, reometer 10 series connection formation corrosion current supply circuit; 2 titanium alloy sheets of soil water experiment box form corrosion target, and corrosive medium is connected in corrosion current supply circuit;
The signals collecting end of information collecting device 16 is connected with resistor, reometer;
The control end of control device 17 is connected with the controlled end of corrosion Mgs, the controlled end of resistor.
Waveform generator and waveform amplifier 14 provide power supply support for whole testing apparatus comprises corrosion current supply circuit, and according to test demand, export by voltage, the electric current of control device control output different wave and size.
Temperature simulation system: be provided with resistive heater 7 and blower fan 6 below support, the residing height of resistive heater 7 is consistent with fan outlet height, also comprise heating Mgs 111, waveform generator and waveform amplifier 14, heating Mgs 111, resistive heater series connection formation heating current supply circuit;
The signals collecting end of information collecting device 16 is connected with the temperature sensor 8 being placed in box body;
The control end of control device 17 is connected with the controlled end of heating Mgs 111.
Humidity simulation system: be provided with seam humidifier 8 in box body, also comprises and adds wet Mgs 112, waveform generator and waveform amplifier 14, add wet Mgs 112, seam humidifier 10 formation of connecting add wet current supply circuit;
The signals collecting end of information collecting device 16 is connected with the humidity sensor 4 being placed in box body;
The control end of control device 17 is connected with the controlled end adding wet Mgs 112.
Rainfall simulation system: be provided with rainfall pipe 9 above soil water experiment box, rainfall pipe 9 is provided with working shaft, at least 1 shower nozzle, and the control end of control device 17 is connected with the controlled end of working shaft.
In said apparatus, information collecting device 16 gathers the parameter of related device, the parameter of reometer, resistor, waveform generator and waveform amplifier, temperature sensor, humidity sensor can be gathered, then by data transmission device, the parameter of above-mentioned device is transferred to backstage to record, it is convenient to post analysis.
Embodiment 2
Based on the corrosion simulation method of the corrosion simulated device of oil and gas pipes edatope, comprise the following steps:
Comprise electric current accelerated corrosion simulation steps: set the voltage of power supply, electric current, waveform in corrosion current supply circuit, start corrosion current supply circuit, make electric current by the soil in 2 titanium alloy sheets 3, soil testing box, corrosion coupon, observe the etch state of corrosion coupon afterwards.
Embodiment 3
On the basis of embodiment 2, described corrosion simulation method, also comprises the following step of at least one:
Temperature simulation step: control device control waveform generator and waveform amplifier 14 outward current, control device control heating Mgs closes, resistive heater generates heat, blower fan 6 is blown and is formed hot blast, box body inner air is heated, resistive heater 7 and blower fan 6 are arranged on below support, and the residing height of resistive heater 7 is consistent with fan outlet height, waveform generator and waveform amplifier 14, heating Mgs 111, resistive heater series connection formation heating current supply circuit;
Humidity simulation step: control device control waveform generator and waveform amplifier 14 outward current, control device controlling moisture Mgs closes, seam humidifier 10 sprays steam, seam humidifier 8 is arranged in box body, waveform generator and waveform amplifier 14, add wet Mgs 112, seam humidifier 10 formation of connecting add wet current supply circuit;
Rainfall simulation step: control device control working shaft, current are flowed into the ejection of rainfall Guan Houcong shower nozzle through working shaft, and rainfall pipe 9 is arranged on above soil water experiment box, and working shaft is connected with rainfall pipe 9, and rainfall pipe 9 is provided with at least 1 shower nozzle. In said apparatus and method:
Described waveform generator and waveform amplifier are the offer power supply support of whole testing apparatus, and arrange voltage, the electric current output of different wave and size according to test demand.
Described temperature control system is made up of resistive heater, blower fan, control device, waveform generator and waveform amplifier, heating Mgs.
Described moisture control system by humidity sensor, add wet Mgs, seam humidifier, control device form.
Described rainfall system is made up of rainfall pipe, shower nozzle, working shaft, control device.
The described soil testing box two ends that corrosion coupon is housed arrange titanium alloy sheet, and test box end face lowest part is provided with screw blind hole road, it is possible to open water filling or draining, ensure the homogeneity of soil humidity. In test casing, 1 ~ 10 soil water experiment box is set, 2 titanium alloy sheets of two soil water experiment boxes are combined into series connection loop or loop in parallel by terminal block, two layers can also be divided by 10 soil water experiment boxes, upper strata series circuit, lower floor's shunt circuit, can be formed and compare, the corrosive effect of research series and parallel connections.
Described information collecting device gathers the signal of related device, and by Signal transmissions to control device.
Described control device can also arrange touch-screen, for regulable control temperature, humidity, according to gas pipeline physical environment climate characteristic, 24 hours temperature, humidity, wind speed, rainfall change rules are set by touch-screen, control device sends instruction control heating, ventilation, rainfall, carry out the control of correlation parameter.
Described data transmission device, it is possible to adopt based on the wireless data transmission device of 4G or WIFI, data output to Central Control Room or technician office carries out the storage of the supervision of process of the test, control and historical data.
Each joint described adopts water proof and dust proof joint, and main effect is prevent the water tested in casing or dust to wire and components and parts junction corrosion-damaged, plays the effect of obstruct water, dirt.
Described thermal insulation layer is assembled by lagging material, for test casing provides a constant temp environment.
Above-described embodiment; the object of the present invention, technical scheme and useful effect have been further described; it is it should be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment of making, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the corrosion simulated device of oil and gas pipes edatope, it is characterized in that: comprise the box body that sealed and be provided with thermal insulation layer (13), support (5) it is provided with in box body, support is provided with soil water experiment box (1), in soil water experiment box, compacting has soil, soil water experiment box upper end open, corrosion coupon (2) it is embedded with in soil, the sidewall of soil water experiment box is provided with 2 symmetrically arranged titanium alloy sheets (3), 2 titanium alloy sheets (3) are connected in corrosion current supply circuit, the power supply of described corrosion current supply circuit is the waveform generator and the waveform amplifier (14) that export non-linear wave power supply.
2. the corrosion simulated device of oil and gas pipes edatope according to claim 1, is characterized in that: be provided with resistive heater (7) and blower fan (6) below support, and the residing height of resistive heater (7) is consistent with fan outlet height.
3. the corrosion simulated device of oil and gas pipes edatope according to claim 1, is characterized in that: be provided with rainfall pipe (9) above soil water experiment box, rainfall pipe (9) is provided with working shaft, at least 1 shower nozzle.
4. the corrosion simulated device of oil and gas pipes edatope according to claim 1, is characterized in that: be provided with seam humidifier (8) in box body.
5. the corrosion simulated device of oil and gas pipes edatope as claimed in any of claims 1 to 4, is characterized in that:
Also comprising Controlling System, described Controlling System comprises control device (17), information collecting device (16), data transmission device (15); Control device (17) and waveform generator and waveform amplifier (14), information collecting device (16) are connected, and information collecting device (16) is connected with data transmission device (15);
Also comprise corrosion Mgs (11), resistor (12), reometer (10), waveform generator and waveform amplifier (14), corrosion Mgs (11), resistor (12), reometer (10) series connection formation corrosion current supply circuit; 2 titanium alloy sheets of soil water experiment box form corrosion target, and corrosive medium is connected in corrosion current supply circuit;
The signals collecting end of information collecting device (16) is connected with resistor, reometer;
The control end of control device (17) is connected with the controlled end of corrosion Mgs, the controlled end of resistor.
6. the corrosion simulated device of oil and gas pipes edatope according to claim 5, is characterized in that:
Resistive heater (7) and blower fan (6) it is provided with below support, the residing height of resistive heater (7) is consistent with fan outlet height, also comprise heating Mgs (111), waveform generator and waveform amplifier (14), heating Mgs (111), resistive heater series connection formation heating current supply circuit;
The signals collecting end of information collecting device (16) is connected with the temperature sensor (8) being placed in box body;
The control end of control device (17) is connected with the controlled end of heating Mgs (111).
7. the corrosion simulated device of oil and gas pipes edatope according to claim 5, is characterized in that:
Be provided with seam humidifier (8) in box body, also comprise and add wet Mgs (112), waveform generator and waveform amplifier (14), add wet Mgs (112), seam humidifier (10) series connection formation add wet current supply circuit;
The signals collecting end of information collecting device (16) is connected with the humidity sensor (4) being placed in box body;
The control end of control device (17) is connected with the controlled end adding wet Mgs (112).
8. the corrosion simulated device of oil and gas pipes edatope according to claim 5, is characterized in that:
Being provided with rainfall pipe (9) above soil water experiment box, rainfall pipe (9) is provided with working shaft, at least 1 shower nozzle, the control end of control device (17) is connected with the controlled end of working shaft.
9., based on the corrosion simulation method of the corrosion simulated device of any one oil and gas pipes edatope in claim 1 to 8, it is characterized in that, comprise the following steps:
Comprise electric current accelerated corrosion simulation steps: set the voltage of power supply, electric current, waveform in corrosion current supply circuit, start corrosion current supply circuit, make electric current by the soil in 2 titanium alloy sheets (3), soil testing boxes, corrosion coupon, after abrasion cycle terminates, observe the etch state of corrosion coupon.
10. corrosion simulation method according to claim 9, is characterized in that, also comprises the following step of at least one:
Temperature simulation step: control device control waveform generator and waveform amplifier (14) outward current, control device control heating Mgs closes, resistive heater generates heat, blower fan (6) air-supply forms hot blast, box body inner air is heated, resistive heater (7) and blower fan (6) are arranged on below support, the residing height of resistive heater (7) is consistent with fan outlet height, waveform generator and waveform amplifier (14), heating Mgs (111), resistive heater series connection formation heating current supply circuit;
Humidity simulation step: control device control waveform generator and waveform amplifier (14) outward current, control device controlling moisture Mgs closes, seam humidifier (10) ejection steam, seam humidifier (8) is arranged in box body, waveform generator and waveform amplifier (14), add wet Mgs (112), seam humidifier (10) series connection formation add wet current supply circuit;
Rainfall simulation step: control device control working shaft, current are flowed into the ejection of rainfall Guan Houcong shower nozzle through working shaft, rainfall pipe (9) is arranged on above soil water experiment box, and working shaft is connected with rainfall pipe (9), and rainfall pipe is provided with at least 1 shower nozzle on (9).
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| CN106872347A (en) * | 2017-03-21 | 2017-06-20 | 国家电网公司 | A kind of metal erosion acceleration test apparatus and method |
| CN111007001A (en) * | 2019-12-27 | 2020-04-14 | 遵义师范学院 | Testing device and method for researching metal corrosion speed in soil degradation process |
| CN112798520A (en) * | 2020-12-31 | 2021-05-14 | 华南理工大学 | Simulation device for electrochemical corrosion of stray current to buried metal in soil environment |
| CN113466118A (en) * | 2021-07-02 | 2021-10-01 | 兰州城市学院 | Corrosion test device for petroleum conveying equipment |
| CN117554277A (en) * | 2024-01-11 | 2024-02-13 | 北京工业大学 | External corrosion acceleration test device considering internal pressure of buried water supply pipeline |
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| CN106872347A (en) * | 2017-03-21 | 2017-06-20 | 国家电网公司 | A kind of metal erosion acceleration test apparatus and method |
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| CN117554277B (en) * | 2024-01-11 | 2024-03-29 | 北京工业大学 | External corrosion acceleration test device considering internal pressure of buried water supply pipeline |
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