LU501582B1 - Test system and method for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions - Google Patents
Test system and method for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions Download PDFInfo
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- LU501582B1 LU501582B1 LU501582A LU501582A LU501582B1 LU 501582 B1 LU501582 B1 LU 501582B1 LU 501582 A LU501582 A LU 501582A LU 501582 A LU501582 A LU 501582A LU 501582 B1 LU501582 B1 LU 501582B1
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- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a test system and test method for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions. The test system includes an oxygen gas feeding device, an oxygen gas feeding control device, a corrosion container, an exhaust control device and a corrosive liquid feeding device. The oxygen gas feeding device is connected to the oxygen gas feeding control device by means of a sealing member; the oxygen gas feeding control device is connected to the corrosion container by means of a sealing elbow; the corrosion container is connected to the exhaust control device by means of a sealing member and is connected to the corrosive liquid feeding device by means of a sealing elbow; a pressure reducing valve can control output pressure of gas by means of an adjusting knob, so as to ensure that oxygen gas in an oxygen gas bottle can be stably output; and a timing power supply controller has a setting function of timing power-on and power-off. The invention can be used for studying a corrosion rule of a metal in an alternating dry and wet corrosion environment under a condition of fully considering oxygen, so as to evaluate corrosion resistance of the metal.
Description
TEST SYSTEM AND METHOD FOR ACCELERATING METAL CORROSION BY ~~ LU501582
[0001] 1. Technical Field
[0002] The invention relates to the field of indoor tests, in particular to a test system and method for metal corrosion by sufficiently feeding oxygen gas in an alternating dry and wet environment.
[0003] 2. Description of Related Art
[0004] A great variety of metal materials are widely used in people's daily life. There are less metal simple substances in nature, and most of metals are smelted from corresponding oxides, such that metal simple substances are more likely to be corroded, resulting in material failure. The losses caused by material failure are often huge, for example, it is reported that in 2014, China's corrosion cost exceeded 2.1 trillion Yuan, accounting for about 3.34% of the gross domestic product (GDP) of that year, that is, the corrosion cost per capita is 1,555 Yuan. Therefore, it is of vital significance to study metal corrosion.
[0005] The metals used in the outdoor environment are more severely corroded than those in the indoor or closed environment, because the metals in the outdoor environment are exposed to wind, sun and rain for a long time, and are actually in an alternating dry and wet corrosion environment, so as to be more likely to be corroded. Relatively speaking, the alternating dry and wet corrosion environment accelerates metal corrosion, which makes the problem more severe. At present, indoor test study is the main study method. According to the relevant metal corrosion test specifications, a plurality of metal corrosion devices under simulated dry and wet conditions are ended, which are mainly divided into rotating type and lifting type. The common problems of these LU501582 two types of devices are complex structure, troublesome manufacture, and relatively difficult maintenance caused by the use of motors. A corrosion device reported in Transactions of the Institution of Mining and Metallurgy, Section A,(2016) of the Mining Technology Journal has a principle consistent with that of a lifting type testing machine described in the metal corrosion specifications, and also faces the relevant problems.
[0006] Then, the primary cause of metal corrosion is metal oxidation, so oxygen plays an important role in metal corrosion study. However, in the existing study, the importance of oxygen is mentioned, but oxygen in the corrosion environment is controlled seldomly, which may be one of the reasons for the randomness of the relevant corrosion results.
[0007] In the metal corrosion test, the simulated alternating dry and wet environment can better reproduce metal corrosion in the outdoor exposed state, and the oxygen in the corrosion environment can be fully considered and controlled such that the corrosion resistance of the metals can be effectively evaluated.
[0008] The objective of the invention is to provide a test system and method, which may automatically realize an environment for accelerating corrosion by feeding oxygen gas in an alternating dry and wet environment, and may adjust a variety and shape of a metal sample and features of a corrosive liquid according to the study objective and test requirements, so as to solve the problems proposed in the background art.
[0009] In order to achieve the above objective, the invention provides the LU501582 following technical solution:
[0010] the test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions includes an oxygen gas feeding device, an oxygen gas feeding control device, a corrosion container, an exhaust control device and a corrosive liquid feeding device. The oxygen gas feeding device is provided with a control gas valve, an oxygen gas bottle and a pressure reducing valve. The oxygen gas feeding control device is provided with a gas vent solenoid valve, a sealing member, a wire and a timing power supply controller. The corrosion container is provided with an upper sealing top plate, an upper connecting flange, a corrosion device cylinder body, a connecting bolt, a bottom connecting flange, a bottom sealing bottom plate and a sealing elbow. The exhaust control device is provided with a wire, an exhaust solenoid valve, a sealing member and a timing power supply controller. The corrosive liquid feeding device is provided with a corrosive liquid tank body, a vertical water pipe, a sealing elbow, a horizontal water pipe, a sealing elbow and a sealing member.
[0011] Further, the oxygen gas feeding device is connected to the oxygen gas feeding control device by means of the sealing member. The oxygen gas feeding control device is connected to the corrosion container by means of the sealing elbow. The corrosion container is connected to the exhaust control device by means of the sealing member and is connected to the corrosive liquid feeding device by means of the sealing elbow.
[0012] Further, the pressure reducing valve includes a locking bolt, a gas pressure meter, an adjusting knob, a gas inlet and an exhaust port, where one end of the locking bolt is fixed to the gas inlet, and the other end thereof is connected to the control gas valve.
[0013] Further, the gas vent solenoid valve is connected to the timing power LU501582 supply controller by means of the wire. The gas vent solenoid valve includes a gas inlet and a gas outlet. The gas inlet is connected to one end of the sealing member, and one end of the sealing member is connected to the exhaust port, such that the oxygen gas feeding device is connected to the oxygen gas feeding control device.
[0014] Further, the upper connecting flange and the bottom connecting flange are arranged at an upper end and a lower end of the corrosion device cylinder body respectively, and the upper sealing top plate and the bottom sealing bottom plate are connected, in a sealed manner, to the upper connecting flange and the bottom connecting flange respectively by means of the connecting bolts.
[0015] Further, an oxygen gas inlet pipe orifice and a waste gas exhaust pipe orifice are provided in the upper sealing top plate, and a corrosive liquid inlet and outlet pipe orifice is provided in a center of the bottom sealing bottom plate. The oxygen inlet pipe orifice is connected to one end of the sealing elbow, and the other end of the sealing elbow is connected to the gas outlet of the gas vent solenoid valve, such that the oxygen gas feeding control device is connected to the corrosion container.
[0016] Further, the exhaust solenoid valve is connected to the timing power supply controller by means of the wire. The exhaust solenoid valve is provided with an inlet and an exhaust port, where the inlet is connected to one end of the sealing member, and the other end of the sealing member is connected to the waste gas exhaust pipe orifice, such that the corrosion container is connected to the exhaust control device.
[0017] Further, a connector is provided at a bottom of the corrosive liquid tank body, the connector, the sealing member, the vertical water pipe, the sealing elbow,
the horizontal water pipe and the sealing elbow are sequentially connected, and the LU501582 other end of the sealing elbow is connected to the corrosive liquid inlet and outlet pipe orifice, such that the corrosion container is connected to the corrosive liquid tank body.
5 [0018] Further, the pressure reducing valve may control output pressure of gas by means of the adjusting knob, so as to ensure that oxygen gas in the oxygen gas bottle may be stably output.
[0019] Further, an oxygen gas feeding timing power supply controller and an exhaust timing power supply controller should have timing power-on and power-off functions.
[0020] The test method for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions includes:
[0021] 1) making a metal sample, where a shape of the metal sample should be determined according to a study objective without hard requirements, and a volume of a corrosion device cylinder body and a surface area of the metal sample should meet requirements on a ratio of a volume of a solution to a surface area of a corrosion sample in a full-immersion corrosion test specification;
[0022] 2) putting the made sample into a corrosion container, and tightening a connecting bolt to seal the sample;
[0023] 3) powering on a timing power supply controller, opening a gas vent solenoid valve, adjusting a pressure reducing valve to meet a test pressure requirement by rotating an adjusting knob, opening a control gas valve, exhausting gas in the pressure reducing valve and the gas vent solenoid valve, and after 30 seconds, powering off the timing power supply controller and closing the gas vent solenoid valve;
[0024] 4) preparing a corrosive liquid according to the study objective, pouring LU501582 the prepared liquid into a corrosive liquid tank body, and lifting a corrosive liquid feeding device to make a bottom of the corrosive liquid tank body and an upper sealing top plate located at the same horizontal position, so as to ensure that a liquid level of the corrosive liquid feeding device is higher than the corrosion container;
[0025] 5) setting power-on time and duration of an oxygen gas feeding timing power supply controller and an exhaust timing power supply controller respectively according to the study objective;
[0026] 6) opening the exhaust solenoid valve when the exhaust timing power supply controller is powered on, and fully filling the corrosion container with the corrosive liquid by the corrosive liquid feeding device under a principle of communicating vessels, such that after the exhaust timing power supply controller is powered off, the metal sample is fully infiltrated;
[0027] 7) opening the gas vent solenoid valve when the oxygen gas feeding timing power supply controller is powered on, feeding oxygen gas into the corrosion container, and extruding the corrosion liquid in the corrosion container to the corrosive liquid feeding device, such that after the oxygen gas feeding timing power supply controller is powered off, the metal sample is fully exposed; and
[0028] 8) repeating steps 6) and 7) through a timing setting function, so as to realize an automatic dry and wet accelerated corrosion test of the metal sample.
[0029] Compared with the prior art, the invention has the beneficial effects: the invention is simple in structure, reasonable in design and high efficiency in operation, and fully ensures participation and feeding of oxygen. Through the timing power-on and power-off functions of the timing power supply controller, the oxygen gas feeding solenoid valve and the exhaust solenoid valve are controlled to be opened and closed respectively, so as to feed and exhaust the oxygen gas to simulate the alternating dry LU501582 and wet corrosion environment. Through specific setting of a timing function, a duration of dry and wet states in a corrosion device is changed, which may be used for studying metal corrosion without a dry-wet ratio. By changing features of the corrosive liquid, influences of different harmful ions on metal corrosion may be studied.
[0030] FIG. 1 is a schematic diagram of the whole structure of the invention.
[0031] FIG. 2 is a structural schematic diagram of an oxygen gas feeding device of the invention.
[0032] FIG. 3 is a structural detailed diagram of an oxygen gas feeding control device of the invention.
[0033] FIG. 4 is a structure and installation schematic diagram of a corrosion container of the invention.
[0034] FIG. 5 is a structural detailed diagram of an exhaust control device of the invention.
[0035] FIG. 6 is a structural schematic diagram of a corrosive liquid feeding device of the invention.
[0036] In the accompanying drawings, l-oxygen gas feeding device, 101-control gas valve, 102-oxygen gas bottle, 103-pressure reducing valve, 103-1-locking bolt, 103-2-gas pressure meter, 103-3-adjusting knob, 103-4-gas inlet, 103-5-exhaust port, 2-oxygen gas feeding control device, 201-gas vent solenoid valve, 201-1-gas inlet, 201-2-gas outlet, 202-sealing member, 203-wire, 204-oxygen gas feeding timing power supply controller, 3-corrosion container, 301-upper sealing top plate, 301-1-oxygen gas inlet pipe orifice, 301-2-waste gas exhaust pipe orifice, LU501582 302-upper connecting flange, 303-corrosion device cylinder body, 304-connecting bolt, 305-bottom connecting flange, 306-bottom sealing bottom plate, 306-1-corrosive liquid inlet and outlet pipe orifice, 307-sealing elbow, 4-exhaust control device, 401-wire, 402-exhaust solenoid valve, 403-sealing member, 404-exhaust timing power supply controller, 5-corrosive liquid feeding device, 501-corrosive liquid tank body, 502-vertical water pipe, 503-sealing elbow, 504-horizontal water pipe, 505-sealing elbow and 506-sealing member.
[0037] The technical solutions in the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the invention. It should be understood that the embodiments described below are merely a part rather than all of the embodiments of the invention.
All other embodiments obtained on the basis of the embodiments of the invention without creative efforts shall fall within the protection scope of the invention.
[0038] A test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions shown in FIGs. 1-6 includes an oxygen gas feeding device 1, a control gas valve 101, an oxygen gas bottle 102, a pressure reducing valve 103, a locking bolt 103-1, a gas pressure meter 103-2, an adjusting knob 103-3, a gas inlet 103-4, an exhaust port 103-5, an oxygen gas feeding control device 2, a gas vent solenoid valve 201, a gas inlet 201-1, a gas outlet 201-2, a sealing member 202, a wire 203, an oxygen gas feeding timing power supply controller 204, a corrosion container 3, an upper sealing top plate 301, an oxygen gas inlet pipe orifice 301-1, a waste gas exhaust pipe orifice 301-2, an upper connecting flange 302, a corrosion device cylinder body 303, a connecting bolt 304, a bottom connecting flange 305, a bottom LU501582 sealing bottom plate 306, a corrosive liquid inlet and outlet pipe orifice 306-1, a sealing elbow 307, an exhaust control device 4, a wire 401, an exhaust solenoid valve 402, a sealing member 403, an exhaust timing power supply controller 404, a corrosive liquid feeding device 5, a corrosive liquid tank body 501, a vertical water pipe 502, a sealing elbow 503, a horizontal water pipe 504, a sealing elbow 505 and a sealing member 506.
[0039] The oxygen gas feeding device 1 is connected to the oxygen gas feeding control device 2 by means of the sealing member 202. The oxygen gas feeding control device 2 is connected to the corrosion container 3 by means of the sealing elbow 307. The corrosion container 3 is connected to the exhaust control device 4 by means of the sealing member 403 and is connected to the corrosive liquid feeding device 5 by means of the sealing elbow 505.
[0040] The pressure reducing valve 103 includes the locking bolt 103-1, the gas pressure meter 103-2, the adjusting knob 103-3, the gas inlet 103-4 and the exhaust port 103-5, where one end of the locking bolt 103-1 is fixed to the gas inlet 103-4, and the other end thereof is connected to the control gas valve 101.
[0041] The gas vent solenoid valve 201 is connected to the oxygen gas feeding timing power supply controller 204 by means of the wire 203. The gas vent solenoid valve 201 includes the gas inlet 201-1 and the gas outlet 201-2. The gas inlet 201-1 is connected to one end of the sealing member 202, and one end of the sealing member 202 is connected to the exhaust port 103-5, such that the oxygen gas feeding device 1 is connected to the oxygen gas feeding control device 2.
[0042] The upper connecting flange 302 and the bottom connecting flange 305 are arranged at an upper end and a lower end of the corrosion device cylinder body
303 respectively, and the upper sealing top plate 301 and the bottom sealing bottom LU501582 plate 306 are connected, in a sealed manner, to the upper connecting flange 302 and the bottom connecting flange 305 respectively by means of the connecting bolts 304.
[0043] The oxygen gas inlet pipe orifice 301-1 and the waste gas exhaust pipe orifice 301-2 are provided in the upper sealing top plate 301, and the corrosive liquid inlet and outlet pipe orifice 306-1 is provided in a center of the bottom sealing bottom plate 306. The oxygen inlet pipe orifice 301-1 is connected to one end of the sealing elbow 307, and the other end of the sealing elbow 307 is connected to the gas outlet 201-2 of the gas vent solenoid valve 201, such that the oxygen gas feeding control device 2 is connected to the corrosion container 3.
[0044] The exhaust solenoid valve 402 is connected to the exhaust timing power supply controller 404 by means of the wire 401. The exhaust solenoid valve 402 is provided with the inlet 402-1 and the exhaust port 402-2, where the inlet 402-1 is connected to one end of the sealing member 403, and the other end of the sealing member 403 is connected to the waste gas exhaust pipe orifice 301-2, such that the corrosion container 3 is connected to the exhaust control device 4.
[0045] A connector 501-1 is provided at a bottom of the corrosive liquid tank body 501, the connector 501-1, the sealing member 506, the vertical water pipe 502, the sealing elbow 503, the horizontal water pipe 504 and the sealing elbow 505 are sequentially connected, and the other end of the sealing elbow 505 is connected to the corrosive liquid inlet and outlet pipe orifice 306-1, such that the corrosion container 3 is connected to the corrosive liquid tank body 501.
[0046] The pressure reducing valve 103 may control output pressure of gas by means of the adjusting knob 103-3, so as to ensure that oxygen gas in the oxygen gas bottle 102 may be stably output.
[0047] The oxygen gas feeding timing power supply controller 204 and the LU501582 exhaust timing power supply controller 404 should have timing power-on and power-off functions.
[0048] A test method for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions includes:
[0049] 1) make a metal sample, where a shape of the metal sample should be determined according to a study objective without hard requirements, and a volume of a corrosion device cylinder body 303 and a surface area of the metal sample should meet requirements on a ratio of a volume of a solution to a surface area of a corrosion sample in a full-immersion corrosion test specification;
[0050] 2) put the made sample into a corrosion container 3, and tighten a connecting bolt 304 to seal the sample;
[0051] 3) power on a timing power supply controller 204, open a gas vent solenoid valve 201, adjust a pressure reducing valve 103 to meet a test pressure requirement by rotating an adjusting knob 103-3, open a control gas valve 101, exhaust gas in the pressure reducing valve 103 and the gas vent solenoid valve 201, and after 30 seconds, power off the timing power supply controller 204 and close the gas vent solenoid valve 201;
[0052] 4) prepare a corrosive liquid according to the study objective, pour the prepared liquid into a corrosive liquid tank body 501, and lift a corrosive liquid feeding device 5 to make a bottom of the corrosive liquid tank body 501 and an upper sealing top plate 301 located at the same horizontal position, so as to ensure that a liquid level of the corrosive liquid feeding device 5 is higher than the corrosion container 3;
[0053] 5) set power-on time and duration of timing power supply controllers LU501582 204 and 404 respectively according to a study objective;
[0054] 6) open the exhaust solenoid valve 402 when the exhaust timing power supply controller 404 is powered on, and fully fill the corrosion container 3 with a corrosive liquid by the corrosive liquid feeding device 5 under a principle of communicating vessels, such that after the timing power supply controller 404 is powered off, the metal sample is fully infiltrated;
[0055] 7) open the gas vent solenoid valve 201 when the oxygen gas feeding timing power supply controller 204 is powered on, feed oxygen gas into the corrosion container 3, and extrude the corrosion liquid in the corrosion container to the corrosive liquid feeding device 5, such that after the timing power supply controller 204 is powered off, the metal sample is fully exposed; and
[0056] 8) repeating steps 6) and 7) through a timing setting function, so as to realize an automatic dry and wet accelerated corrosion test of the metal sample.
[0057] Obviously, the invention is not limited to the details of the embodiments described above. The embodiments described above should be considered as exemplary rather than limiting. The scope of the invention is defined by the appended claims, and includes all changes which fall within the meaning and scope of equivalency of the claims. Any reference numeral in the claims should not be considered as limiting the related claims.
[0058] In addition, the description should be considered as a whole. The above implementation modes are not unique independent technical solution of the invention. The technical solutions in the embodiments may be appropriately combined and regulated to arrive at other implementation modes understandable by those skilled in theart.
Claims (10)
1. A test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions, comprising: an oxygen gas feeding device(1), an oxygen gas feeding control device(2),a corrosion container(3), an exhaust control device(4) and a corrosive liquid feeding device(5); the oxygen gas feeding device(1) is provided with a control gas valve(101), an oxygen gas bottle (102) and a pressure reducing valve (103).; the oxygen gas feeding control device (2) is provided with a gas vent solenoid valve(201), a first sealing member (202), a first wire (203) and an oxygen gas feeding timing power supply controller (204); the corrosion container (3) is provided with an upper sealing top plate(301), an upper connecting flange (302), a corrosion device cylinder body (303), a connecting bolt (304), a bottom connecting flange (305), a bottom sealing bottom plate (306) and a first sealing elbow (307); the exhaust control device (4) is provided with a second wire (401), an exhaust solenoid valve (402), a second sealing member (403) and an exhaust timing power supply controller (404); the corrosive liquid feeding device (5) is provided with a corrosive liquid tank body (501), a vertical water pipe (502), a second sealing elbow (503), a horizontal water pipe (504), a third sealing elbow (505) and a third sealing member (506). the oxygen gas feeding device (1) is connected to the oxygen gas feeding control device (2) by means of the first sealing member (202); the oxygen gas feeding control device (2) is connected to the corrosion container (3) by means of the first sealing elbow (307);
the corrosion container (3) is connected to the exhaust control device (4) by LUS01582 means of the second sealing member (403) and 1s connected to the corrosive liquid feeding device (5) by means of the third sealing elbow (505).
2. The test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions according to claim 1, the pressure reducing valve (103) includes a locking bolt (103-1) , a gas pressure meter (103-2) , an adjusting knob (103-3), a gas inlet (103-4) and an exhaust port (103-5), where one end of the locking bolt (103-1) is fixed to the gas inlet (103-4), and the other end thereof is connected to the control gas valve (101).
3. The test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions according to claim 2, the gas vent solenoid valve (201) is connected to the oxygen gas feeding timing power supply controller (204) by means of the first wire (203); the gas vent solenoid valve (201) includes a gas inlet (201-1) and a gas outlet (201-2). The gas inlet (201-1) is connected to one end of the first sealing member (202), and the other end of the first sealing member (202) is connected to the exhaust port (103-5), such that the oxygen gas feeding device (1) is connected to the oxygen gas feeding control device (2).
4. The test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions according to claim 1, the upper connecting flange (302) and the bottom connecting flange (305) are arranged at an upper end and a lower end of the corrosion device cylinder body (303) respectively, and the upper sealing top plate (301) and the bottom sealing bottom plate (306) are connected, in a sealed manner, to the upper connecting flange (302) and the bottom connecting flange (305) respectively by means of the connecting bolts (304).
5. The test system for accelerating metal corrosion by feeding oxygen gas under LU501582 dry and wet conditions according to claim 4, an oxygen gas inlet pipe orifice (301-1) and a waste gas exhaust pipe orifice (301-2) are provided in the upper sealing top plate (301), and a corrosive liquid inlet and outlet pipe orifice (306-1) is provided in a center of the bottom sealing bottom plate (306);the oxygen inlet pipe orifice (301-1) is connected to one end of the first sealing elbow (307); and the other end of the first sealing elbow (307) is connected to the gas outlet (201-2) of the gas vent solenoid valve (201), such that the oxygen gas feeding control device (2) is connected to the corrosion container (3).
6. The test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions according to claim 1, the exhaust solenoid valve (402) is connected to the exhaust timing power supply controller (404) timing power supply controller by means of the second wire (401)wire.; The the exhaust solenoid valve (402) is provided with an inlet port (402-1) and an exhaust port (402-2), wherein the inlet port (402-1) is connected to one end of the second sealing member (403), and the other end of the second sealing member (403) is connected to the waste gas exhaust pipe orifice (301-2), such that the corrosion container (3) is connected to the exhaust control device (4).
7. The test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions according to claim 1, a connector (501-1) is provided at a bottom of the corrosive liquid tank body (501), the connector (501-1), the third sealing member (506)the sealing member, the vertical water pipe (502), the second sealing elbow (503), the horizontal water pipe (504) and the third sealing elbow (505) are sequentially connected, and the other end of the third sealing elbow (505) is connected to the corrosive liquid inlet and outlet pipe orifice (306-1), such that the LU501582 corrosion container (3) is connected to the corrosive liquid tank body (501).
8. The test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions according to claim 2, the pressure reducing valve (103) may control output pressure of gas by means of the adjusting knob (103-3), so as to ensure that oxygen gas in the oxygen gas bottle (102) may be stably output.
9. The test system for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions according to claim 1, an oxygen gas feeding timing power supply controller (204) and an exhaust timing power supply controller (404) should have timing power-on and power-off functions.
10. A test method for accelerating metal corrosion by feeding oxygen gas under dry and wet conditions includes: 1) making a metal sample, where a shape of the metal sample should be determined according to a study objective, and a volume of a corrosion device cylinder body (303) and a surface area of the metal sample should meet requirements on a ratio of a volume of a solution to a surface area of a corrosion sample in a full-immersion corrosion test specification; 2) putting the made sample into a corrosion container (3), and tightening a connecting bolt (304) to seal the sample; 3) powering on a timing power supply controller (204), opening a gas vent solenoid valve (201), adjusting a pressure reducing valve to meet a test pressure requirement by rotating an adjusting knob, opening a control gas valve, exhausting gas in the pressure reducing valve and the gas vent solenoid valve, and after 30 seconds, powering off the timing power supply controller and closing the gas vent solenoid valve;
4) preparing a corrosive liquid according to the study objective, pouring the LU501582 prepared liquid into a corrosive liquid tank body, and lifting a corrosive liquid feeding device to make a bottom of the corrosive liquid tank body and an upper sealing top plate located at the same horizontal position, so as to ensure that a liquid level of the corrosive liquid feeding device is higher than the corrosion container;
5) setting power-on time and duration of an oxygen gas feeding timing power supply controller and an exhaust timing power supply controller respectively according to the study objective;
6) opening the exhaust solenoid valve when the exhaust timing power supply controller is powered on, and fully filling the corrosion container with the corrosive liquid by the corrosive liquid feeding device under a principle of communicating vessels, such that after the exhaust timing power supply controller is powered off, the metal sample is fully infiltrated;
7) opening the gas vent solenoid valve when the oxygen gas feeding timing power supply controller is powered on, feeding oxygen gas into the corrosion container, and extruding the corrosion liquid in the corrosion container to the corrosive liquid feeding device, such that after the oxygen gas feeding timing power supply controller is powered off, the metal sample is fully exposed; and
8) repeating steps 6) and 7) through a timing setting function, so as to realize an automatic dry and wet accelerated corrosion test of the metal sample.
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| CN202110237047.XA CN113029923B (en) | 2021-03-03 | 2021-03-03 | Test system and test method for accelerating metal corrosion by introducing oxygen under dry and wet conditions |
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| CN102967548B (en) * | 2012-11-09 | 2015-08-19 | 中国水利水电科学研究院 | A kind of assay method of rock decay speed |
| CN105891094B (en) * | 2016-04-05 | 2019-03-26 | 合肥通用机械研究院有限公司 | A kind of corrosion testing apparatus and its test method of analog complex environment |
| CN106442296A (en) * | 2016-11-04 | 2017-02-22 | 长沙理工大学 | Simulating accelerating test method and device for testing corrosion performance of metal in coastal industrial atmosphere |
| JP7117134B2 (en) * | 2018-04-18 | 2022-08-12 | 日本製鉄株式会社 | Corrosion test apparatus and corrosion test method |
| CN109030336B (en) * | 2018-06-25 | 2020-09-25 | 西南石油大学 | Device for researching corrosion damage of torque shoulder surface of special threaded joint of acid gas well |
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2021
- 2021-03-03 CN CN202110237047.XA patent/CN113029923B/en active Active
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2022
- 2022-03-02 LU LU501582A patent/LU501582B1/en active IP Right Grant
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| CN113029923B (en) | 2023-04-14 |
| CN113029923A (en) | 2021-06-25 |
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