Metal coupon corrosion device capable of mixing various gases into lubricating oil

Abstract

The invention discloses a metal coupon corrosion device capable of mixing various gases into lubricating oil. A metal coupon corrosion system of the metal coupon corrosion device comprises a sample tube, a hanging bracket and a base, the sample tube is supported on the base; the heating element is located at the sample tube bottom; the hanging bracket is mounted in the sample tube; the gas supply system comprises a gas conveying pipe, and a gas mass flow meter and a flow control valve which are mounted on the gas conveying pipe; the exhaust system comprises an exhaust pipe and a condenser; the exhaust pipe is mounted at the top of the sample pipe through the condenser and is used for communicating the interior of the sample pipe with the atmosphere; the condenser is mounted between the sample tube and the exhaust tube; the monitoring system is used for controlling the heating element according to the temperature of the lubricating oil in the sample tube and controlling the gas mass flow meter and the flow control valve according to the gas concentration in the sample tube. According to the metal coupon corrosion device, various environmental conditions can be provided by simulating a complex actual use environment, and the corrosion resistance of metal parts can be comprehensively evaluated.

Description

Technical Field

[0001] The invention belongs to the technical field of metal material corrosion, and in particular relates to a metal hanging piece corrosion device capable of mixing multiple gases into lubricating oil. Background Art

[0002] In the process of in-depth research on the corrosion resistance of mechanical parts and systematically exploring the behavior of parts in different working environments, the influence of the gas environment is particularly critical. By changing and controlling the gas environment, the corrosion mechanism of metal parts in lubricants containing different gases can be accurately studied. The gas environment plays an important role in corrosion resistance experiments. For example, the use of inert gases such as nitrogen or argon can effectively prevent oxidation of the material surface, which is crucial for analyzing the corrosion resistance and oxidation resistance of metal parts. This control helps to maintain the original state of the material surface and reduce changes in surface morphology and performance caused by oxidation.

[0003] In addition to controlling the gas environment during the corrosion process, it can also eliminate the interference of impurities and moisture in the air on the experimental results. Accurate environmental control not only improves the stability and repeatability of experimental conditions, but also makes the comparison of the corrosion resistance of parts under different working environments more scientific and reliable. Research in different gas environments can more comprehensively understand the performance of mechanical parts under different working conditions, and provide important data support for optimizing design and improving engineering practice.

[0004] Experiments to evaluate the corrosion resistance of metal parts include a variety of methods: salt spray tests are used to simulate corrosion in marine environments, immersion tests test performance in specific liquids, wet heat tests detect corrosion in high humidity environments, electrochemical tests analyze corrosion behavior in electrochemical environments, accelerated corrosion tests quickly evaluate corrosion resistance under extreme conditions, creep corrosion tests focus on corrosion under high temperature and high stress, dew point tests simulate corrosion at dew point temperatures, hydrogen corrosion tests evaluate embrittlement in hydrogen environments, and environmental corrosion tests simulate corrosion in actual use environments. These methods help optimize material selection and design.

[0005] In order to simulate the corrosion of parts in different liquids, different hydrogen and different temperature environments, and provide a reliable data basis for the use and research of parts, we combine immersion tests, hydrogen corrosion resistance tests and wet heat tests. However, the existing immersion tests can only simulate corrosion in a specific liquid environment, which takes a long time and has limited evaluation of gas corrosion and local corrosion. Wet heat tests face the problems of difficult environmental control, limitations and poor actual representativeness, and may not accurately simulate complex actual conditions. Hydrogen corrosion resistance tests are challenging due to complex testing, high costs, not applicable to all metals, and difficulty in simulating actual usage. Summary of the invention

[0006] The present invention provides a metal coupon corrosion device capable of mixing a variety of gases into lubricating oil. The metal coupon corrosion device provides a variety of environmental conditions by simulating a complex actual use environment, thereby ensuring that the test is more representative and accurate. At the same time, it has efficient environmental control and testing capabilities, reduces time consumption and operation complexity, and can comprehensively evaluate the corrosion resistance of metal parts under various conditions.

[0007] In order to achieve the above object, the present invention adopts the following specific technical solutions:

[0008] A metal hanging piece corrosion device capable of mixing multiple gases into lubricating oil, the metal hanging piece corrosion device comprising a metal hanging piece corrosion system, a gas supply system, an exhaust system and a monitoring system;

[0009] The metal coupon corrosion system comprises a sample tube, a hanger and a base; the sample tube is supported on the base and is used to contain lubricating oil and mixed gas; a heating element is arranged in the base, and the heating element is located at the bottom of the sample tube; the hanger is installed in the sample tube and is used to hang the metal coupon to be tested;

[0010] The gas supply system includes a gas delivery pipe, a gas mass flow meter and a flow control valve installed on the gas delivery pipe, which are used to deliver gas into the sample tube to simulate various gas environments;

[0011] The exhaust system includes an exhaust pipe and a condenser; the exhaust pipe is installed on the top of the sample tube through the condenser, and is used to connect the interior of the sample tube with the atmosphere; the condenser is installed between the sample tube and the exhaust pipe, and is used to cool the oil vapor discharged from the sample tube to make it reflux;

[0012] The monitoring system is connected to the heating element, the gas mass flow meter and the flow control valve, and is used to control the heating element according to the temperature of the lubricating oil in the sample tube, and to control the gas mass flow meter and the flow control valve according to the gas concentration in the sample tube.

[0013] Furthermore, the condenser includes a condenser pipe, a water inlet pipeline and a drain pipeline;

[0014] The condenser is connected between the sample tube and the exhaust pipe, the bottom end is connected with the water inlet pipeline, and the top end is provided with the water outlet pipeline.

[0015] Furthermore, the gas supply system further comprises a plurality of gas cylinders and a gas mixing tube;

[0016] Each gas cylinder is used to store different gases;

[0017] The gas delivery pipe corresponds to the gas cylinders one by one, one end of the gas delivery pipe is connected to the corresponding gas cylinder, and the other end is connected to one end of the gas mixing pipe;

[0018] The other end of the gas mixing tube extends into the bottom end of the sample tube, and is used to fully mix the gases provided by the various gas cylinders and pass the gases into the lubricating oil in the sample tube.

[0019] Furthermore, the gas supply system further comprises a plurality of gas generators and gas mixing tubes;

[0020] Each gas generator is used to produce different gases;

[0021] The gas delivery pipe corresponds to the gas generator one by one, one end of the gas delivery pipe is connected to the corresponding gas generator, and the other end is connected to one end of the gas mixing pipe;

[0022] The other end of the gas mixing tube extends into the bottom end of the sample tube, and is used to fully mix the gases provided by the various gas generators and pass the gases into the lubricating oil in the sample tube.

[0023] Furthermore, the top of the sample tube is provided with a conical opening;

[0024] A conical plastic buckle is arranged on the top of the hanger; the conical plastic buckle is snapped into the conical opening, thereby keeping the height of the hanger in the sample tube fixed.

[0025] Furthermore, the monitoring system includes a temperature controller, a sensor and a first thermocouple thermometer;

[0026] The first thermocouple thermometer is inserted into the lubricating oil in the sample tube to measure the temperature of the lubricating oil;

[0027] The sensor is connected between the temperature controller and the first thermocouple thermometer, and is used to transmit the temperature information measured by the first thermocouple thermometer to the temperature controller;

[0028] The temperature controller is used to control the heating element according to the temperature information measured by the first thermocouple thermometer.

[0029] Furthermore, the monitoring system further comprises a second thermocouple thermometer;

[0030] The second thermocouple thermometer is installed at the outer bottom of the sample tube to measure the temperature of the outer side of the sample tube near the heating element to prevent the heating element from drying out and causing a short circuit due to excessive temperature;

[0031] The sensor is connected to the second thermocouple thermometer and is used to transmit the temperature information measured by the second thermocouple thermometer to the temperature controller;

[0032] The temperature controller is used to control the heating element according to temperature information measured by the first thermocouple thermometer and the second thermocouple thermometer.

[0033] Furthermore, the monitoring system further comprises a gas sensor installed outside the sample tube;

[0034] The gas sensor is used to detect the gas environment outside the sample tube.

[0035] Furthermore, it also includes a ventilation device connected to the monitoring system;

[0036] When the gas sensor detects the gas leakage, the monitoring system controls the ventilation device to open to realize indoor air circulation.

[0037] Furthermore, the ventilation device is an exhaust fan.

[0038] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0039] 1. The metal coupon corrosion device of the present invention can transport various gases into the sample tube of the metal coupon corrosion system through the gas supply system, and after the various gases are mixed, they are introduced into the lubricating oil in the sample tube. The gas mass flowmeter and flow control valve of the gas transmission pipe can accurately adjust the flow of each gas to ensure that they are evenly mixed in the pipeline. The concentration of the mixed gas can be controlled by the gas mass flowmeter to ensure the stability of the concentration of the mixed gas, which can effectively simulate various complex gas environments, reduce gas stratification or unevenness, and improve mixing efficiency and experimental accuracy; at the same time, a heating element is arranged in the base supporting the sample tube, and the temperature of the lubricating oil in the sample tube can be controlled by the heating element, so that the above-mentioned metal coupon corrosion device can simulate the actual use environment of metal parts; in addition, the exhaust gas can also be cooled by the condenser arranged in the exhaust pipe, so that the vaporized lubricating oil vapor is cooled and refluxed, reducing the evaporation loss of the lubricating oil, and at the same time, it is beneficial to protect the environment.

[0040] 2. The metal coupon corrosion device of the present invention completely separates the gas, liquid and circuit systems, effectively avoiding interference and potential dangers between different systems; by preventing combustion or electrical failures caused by liquid or gas leakage, safety is ensured in high-risk experiments; each system is independently controlled and monitored, which improves the ability of fault detection and processing and enhances the overall safety of operation.

[0041] 3. The metal coupon corrosion device of the present invention is also equipped with a ventilation system, which can timely discharge harmful gases generated during the experiment and maintain good air quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the principle structure of the metal coupon corrosion device of the present invention.

[0043] Among them, 1-sample tube, 2-hanger, 3-base, 4-heating element, 5-tube cover, 6-metal hanging plate, 11-gas pipe, 12-gas mass flow meter, 13-gas source, 14-gas mixing pipe, 21-exhaust pipe, 22-condenser, 23-water inlet pipe, 24-drainage pipe, 31-temperature controller, 32-sensor, 33-first thermocouple thermometer, 34-second thermocouple thermometer. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] This embodiment provides a metal coupon corrosion device that can mix multiple gases into lubricating oil, such as Figure 1 As shown in the structure, the metal coupon corrosion device includes a metal coupon corrosion system, a gas supply system, an exhaust system and a monitoring system; wherein:

[0046] The metal coupon corrosion system includes a sample tube 1, a hanger 2 and a base 3; the sample tube 1 is supported on the base 3 and is used to contain lubricating oil and mixed gas. The mixed gas is filled into the lubricating oil to dissolve the gas in the lubricating oil, thereby simulating the specific use environment of the metal parts; the base 3 is used to support the sample tube 1, and is provided with a mounting hole that matches the shape of the sample tube 1, so that the sample tube 1 can be installed by inserting it into the mounting hole of the base 3; a heating element 4 is provided in the base 3, and the heating element 4 is located at the bottom of the sample tube 1. The sample tube 1 and the lubricating oil inside are heated by the heating element 4, so that the temperature of the lubricating oil is close to the actual use temperature; the hanger 2 is installed in the sample tube 1, and is used to hang the metal coupon 6 to be tested; the metal coupon 6 is formed by cutting metal parts. The sample tube 1 also has a tube cover 5 installed on the top. In order to facilitate the disassembly and assembly of the hanger 2 and the metal hanging piece 6, the top of the hanger 2 can be installed at the top opening of the sample tube 1, and the bottom end of the hanger 2 can be extended into the inner bottom of the sample tube 1, so that the metal hanging piece 6 hung on the hanger 2 is completely immersed in the lubricating oil; the top of the sample tube 1 is provided with a conical opening that is larger at the top and smaller at the bottom; the top of the hanger 2 is provided with a conical plastic buckle; the conical plastic buckle is clamped to the conical opening through the conical surface, so as to keep the height of the hanger 2 in the sample tube 1 fixed.

[0047] The gas supply system includes a gas pipe 11, a gas mass flow meter 12 installed on the gas pipe 11, and a flow control valve, which are used to transport gas into the sample tube 1 to simulate various gas environments; the gas supply system can provide any gas required for corrosion into the sample tube 1 to simulate a real working environment. The gas supply system includes a gas source 13, a gas pipe 11, a gas mass flow meter 12, a flow control valve, and a gas mixing tube 14; Figure 1In the figure, two gas sources 13 are provided as an example for explanation. The gas source 13 can be a gas cylinder or a gas generator; each gas source 13 is connected to a gas delivery pipe 11, and the other ends of the two gas delivery pipes 11 are connected to the inlet of the gas mixing pipe 14. A gas mass flow meter 12 and a flow control valve (not shown in the figure) are installed in each gas delivery pipe 11. The gas mass flow meter 12 measures the gas mass flow, and the flow control valve can control the size of the gas flow to simulate the concentration of different gases. The gas mixing pipe 14 can enter the sample tube 1 through the pipe cover 5. When the gas source 13 uses a gas cylinder, each gas cylinder stores different gases; the gas delivery pipe 11 corresponds to the gas cylinder one by one, one end is connected to the corresponding gas cylinder, and the other end is connected to one end of the gas mixing pipe 14; the other end of the gas mixing pipe 14 extends into the bottom end of the sample tube 1, which is used to fully mix the gas provided by each gas cylinder and pass it into the lubricating oil in the sample tube 1. When the gas source 13 adopts a gas generator, each gas generator is used to generate different gases. For example, when hydrogen is needed, hydrogen can be generated by electrolyzing water through a hydrogen generator. The gas delivery pipe 11 corresponds to the gas generator one by one, one end of which is connected to the corresponding gas generator, and the other end is connected to one end of a gas mixing pipe 14. The other end of the gas mixing pipe 14 extends into the bottom end of the sample tube 1, and is used to fully mix the gases provided by each gas generator and pass them into the lubricating oil in the sample tube 1. For example, hydrogen, air and nitrogen oxides (NO X )Simulate the gas environment of automobile exhaust.

[0048] The exhaust system includes an exhaust pipe 21 and a condenser; the exhaust pipe 21 is installed on the top of the sample tube 1 through the condenser, and is used to connect the inside of the sample tube 1 with the atmosphere; the condenser is installed between the sample tube 1 and the exhaust pipe 21, and is used to cool the oil vapor discharged from the sample tube 1 so that it can flow back to the sample tube 1; the condenser includes a condenser 22, a water inlet pipeline 23 and a water outlet pipeline 24; the condenser 22 is connected between the sample tube 1 and the exhaust pipe 21, and is provided with a water inlet pipeline 23 at the bottom and a water outlet pipeline at the top. The condenser 22 cools the high-temperature oil vapor by continuously passing flowing normal temperature water, so that it cools down and flows back to the sample tube 1, so that the volume of the corrosive oil sample remains constant.

[0049] The monitoring system is connected to the heating element 4, the gas mass flowmeter 12 and the flow control valve, and is used to control the heating element 4 according to the temperature of the lubricating oil in the sample tube 1, and control the gas mass flowmeter 12 and the flow control valve according to the gas concentration in the sample tube 1. The monitoring system may include a temperature controller 31, a sensor 32, a first thermocouple thermometer 33 and a second thermocouple thermometer 34; the first thermocouple thermometer 33 is inserted into the lubricating oil in the sample tube 1, and is used to measure the temperature of the lubricating oil; the sensor 32 is connected between the temperature controller 31 and the first thermocouple thermometer 33, and is used to transmit the temperature information measured by the first thermocouple thermometer 33 to the temperature controller 31; the temperature controller 31 is used to control the heating element 4 according to the temperature information measured by the first thermocouple thermometer 33. The second thermocouple thermometer 34 is installed at the bottom of the outer side of the sample tube 1, and is used to measure the outer temperature of the sample tube 1 near the heating element 4, so as to prevent the heating element 4 from drying out and causing a short circuit due to excessive temperature; the sensor 32 is connected to the second thermocouple thermometer 34, and is used to transmit the temperature information measured by the second thermocouple thermometer 34 to the temperature controller 31; the temperature controller 31 is used to control the heating element 4 according to the temperature information measured by the first thermocouple thermometer 33 and the second thermocouple thermometer 34. In the corrosion test, according to the national standard, corrosion needs to be carried out at 135°C. At this time, the first thermocouple thermometer 33 is needed to measure the real-time temperature of the corrosive engine oil. When it reaches 135°C, the heating element 4 stops heating, and when the temperature drops to 130°C, the heating element 4 starts heating.

[0050] In the above-mentioned metal coupon corrosion device, a ventilation device connected to the monitoring system is also included; the monitoring system also includes a gas sensor installed outside the sample tube 1; the gas sensor is used to detect the gas environment outside the sample tube 1. The ventilation device can be an exhaust fan. When the gas sensor detects a gas leak, the monitoring system controls the ventilation device to open to realize indoor air circulation. The purpose of setting the ventilation device is to prevent the dangerous gas in the test room from reaching the set concentration, such as: hydrogen reaches the explosion concentration (4%-75%). Therefore, when it is detected that the hydrogen concentration reaches the lower explosion limit, an alarm will be issued. The experimenter will start the ventilation device such as the exhaust fan through monitoring and observe it, and the residual hydrogen will be discharged from the laboratory through the ventilation device. The same is true for the gas control of nitrogen oxides. The exhaust fan can be installed on the roof of the house in the laboratory, with the air suction port facing the roof of the house, and the exhaust port is connected to the outside of the window through the air pump rack to extract the hydrogen accumulated in the test room during the test exhaust process, so as to prevent the accumulation of hydrogen to a concentration of 4%, resulting in the risk of explosion in the test room and other dangerous situations.

[0051] The above-mentioned metal coupon corrosion device can transport various gases to the sample tube 1 of the metal coupon corrosion system through the gas supply system, and after the various gases are mixed, they are introduced into the lubricating oil in the sample tube 1. The gas mass flowmeter 12 and the flow control valve of the gas supply pipe 11 can accurately adjust the flow of each gas to ensure that they are evenly mixed in the pipeline. The control of the gas mass flowmeter 12 can ensure the stability of the concentration of the mixed gas, which can effectively simulate various complex gas environments, reduce gas stratification or unevenness, and improve mixing efficiency and experimental accuracy; at the same time, a heating element 4 is arranged in the base 3 supporting the sample tube 1, and the temperature of the lubricating oil in the sample tube 1 can be controlled by the heating element 4, so that the above-mentioned metal coupon corrosion device can simulate the actual use environment of metal parts; in addition, the exhaust gas can also be cooled by the condenser arranged in the exhaust pipe 21, so that the vaporized lubricating oil vapor is cooled and refluxed, reducing the evaporation loss of the lubricating oil, and at the same time is beneficial to protecting the environment.

[0052] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A metal coupon corrosion device capable of mixing multiple gases into lubricating oil, characterized in that: Including metal coupon corrosion system, gas supply system, exhaust system and monitoring system; The metal coupon corrosion system comprises a sample tube, a hanger and a base; the sample tube is supported on the base and is used to contain lubricating oil and mixed gas; a heating element is arranged in the base, and the heating element is located at the bottom of the sample tube; the hanger is installed in the sample tube and is used to hang the metal coupon to be tested; The gas supply system includes a gas delivery pipe, a gas mass flow meter and a flow control valve installed on the gas delivery pipe, which are used to deliver gas into the sample tube to simulate various gas environments; The exhaust system includes an exhaust pipe and a condenser; the exhaust pipe is installed on the top of the sample tube through the condenser, and is used to connect the interior of the sample tube with the atmosphere; The condenser is installed between the sample tube and the exhaust pipe, and is used to cool the oil vapor exhausted from the sample tube to make it reflux; The monitoring system is connected to the heating element, the gas mass flow meter and the flow control valve, and is used to control the heating element according to the temperature of the lubricating oil in the sample tube, and to control the gas mass flow meter and the flow control valve according to the gas concentration in the sample tube.

2. The metal coupon corrosion device according to claim 1, characterized in that: The condenser comprises a condenser pipe, a water inlet pipe and a drainage pipe; The condenser is connected between the sample tube and the exhaust pipe, the water inlet pipeline is arranged at the bottom end, and the water outlet pipeline is arranged at the top end.

3. The metal coupon corrosion device according to claim 1, characterized in that: The gas supply system also includes a plurality of gas cylinders and a gas mixing tube; Each gas cylinder is used to store different gases; The gas delivery pipe corresponds to the gas cylinders one by one, one end of the gas delivery pipe is connected to the corresponding gas cylinder, and the other end is connected to one end of the gas mixing pipe; The other end of the gas mixing tube extends into the bottom end of the sample tube, and is used to fully mix the gases provided by the various gas cylinders and pass the gases into the lubricating oil in the sample tube.

4. The metal coupon corrosion device according to claim 1, characterized in that: The gas supply system also includes a plurality of gas generators and gas mixing tubes; Each gas generator is used to produce different gases; The gas delivery pipe corresponds to the gas generator one by one, one end of the gas delivery pipe is connected to the corresponding gas generator, and the other end is connected to one end of the gas mixing pipe; The other end of the gas mixing tube extends into the bottom end of the sample tube, and is used to fully mix the gases provided by the various gas generators and pass the gases into the lubricating oil in the sample tube.

5. The metal coupon corrosion device according to claim 1, characterized in that: The top of the sample tube is provided with a conical opening; A conical plastic buckle is arranged on the top of the hanger; the conical plastic buckle is snapped into the conical opening, thereby keeping the height of the hanger in the sample tube fixed.

6. The metal coupon corrosion device according to claim 1, characterized in that: The monitoring system includes a temperature controller, a sensor and a first thermocouple thermometer; The first thermocouple thermometer is inserted into the lubricating oil in the sample tube to measure the temperature of the lubricating oil; The sensor is connected between the temperature controller and the first thermocouple thermometer, and is used to transmit the temperature information measured by the first thermocouple thermometer to the temperature controller; The temperature controller is used to control the heating element according to the temperature information measured by the first thermocouple thermometer.

7. The metal coupon corrosion device according to claim 6, characterized in that: The monitoring system also includes a second thermocouple thermometer; The second thermocouple thermometer is installed at the outer bottom of the sample tube to measure the temperature of the outer side of the sample tube near the heating element to prevent the heating element from drying out and causing a short circuit due to excessive temperature; The sensor is connected to the second thermocouple thermometer and is used to transmit the temperature information measured by the second thermocouple thermometer to the temperature controller; The temperature controller is used to control the heating element according to temperature information measured by the first thermocouple thermometer and the second thermocouple thermometer.

8. The metal coupon corrosion device according to any one of claims 1 to 7, characterized in that: The monitoring system also includes a gas sensor installed outside the sample tube; The gas sensor is used to detect the gas environment outside the sample tube.

9. The metal coupon corrosion device according to claim 8, characterized in that: Also included is a ventilation device connected to the monitoring system; When the gas sensor detects the gas leakage, the monitoring system controls the ventilation device to open to realize indoor air circulation.

10. The metal coupon corrosion device according to claim 9, characterized in that: The ventilation device is an exhaust fan.

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