CN111781227A - Device and method for detecting high-temperature oxidation resistance of coating - Google Patents
Device and method for detecting high-temperature oxidation resistance of coating Download PDFInfo
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Abstract
A detection device and method of high-temperature oxidation resistance of a coating, the detection device includes the test platform, the first electrode slips and clamps on the test platform vertically, the first electrode can slip horizontally on the test platform, the second electrode is fixed in test platform vertically; a coating sample is fixedly connected between the upper part of the first electrode and the upper part of the second electrode, a first cooling water sleeve is fixedly installed inside the first electrode, the first cooling water sleeve is respectively communicated with a first cooling water inlet pipe and a first cooling water outlet pipe, a second cooling water sleeve is fixedly installed inside the second electrode, and the second cooling water sleeve is respectively communicated with a second cooling water inlet pipe and a second cooling water outlet pipe; the first electrode and the second electrode are electrically connected with the two ends of a power supply and the two ends of a transformer, a power controller is connected between the power supply and the transformer and connected with a program controller, the program controller is connected with a temperature measuring instrument through a data line, a detection probe of the temperature measuring instrument is aligned to the middle part of a coating sample, and the program controller is also connected with a computer through the data line for remote monitoring.
Description
Technical Field
The application relates to the technical field of coating performance detection, in particular to a device and a method for detecting high-temperature oxidation resistance of a coating.
Background
With the continuous development of science and technology, the application temperature of high-temperature materials is continuously improved, especially in the aerospace and national defense fields, along with the continuous upgrading and updating of engines, higher temperature tolerance and high-temperature performance requirements are provided for the high-temperature materials, especially the requirements for the use temperature and the oxidation resistance of high-temperature oxidation resistant coatings are greatly improved, such as heat-resistant high-strength structural materials of supersonic aircrafts, rockets and missiles, parts of control and regulation devices and the like, and the parts are exposed to the gas medium environment and need to be coated with special coatings on the surfaces to prevent the oxidation of alloys at high temperature, such as engine combustion chambers, missile engine nosecones, nozzles, exhaust pipes and other important parts, the use temperature is improved to 1600-2000 ℃ from 1200-1400 ℃, and the detection of the high-temperature oxidation resistance of the high-temperature oxidation resistant coatings is always difficult, especially 1600 to 2000 ℃. The traditional muffle furnace is used for heating below 1400 ℃, when the temperature reaches 1600 ℃, the muffle furnace can be detected for a short time due to high temperature, and when the temperature is increased again, the muffle furnace cannot bear the high-temperature requirement due to the limitation of a furnace body heat-insulating material. When the temperature reaches 1700-2000 ℃, no effective detection means is available. And the accurate time that can't observe surface coating change and coating inefficacy when heating and keeping warm with the muffle furnace can only take out the observation after cooling blowing out, and it is high to detect the power consumption with the muffle furnace heating, and the time cycle of rising and falling the temperature cycle is long, and the muffle furnace adopts the thermocouple temperature measurement, and temperature control is undulant greatly, and the accuracy is low, is unfavorable for experiment and scientific research.
Chinese patent No. 201810096718.3 discloses a device for detecting the heat-insulating property of a steel-structure fireproof coating, which detects the heat-insulating property of the coating by heating with a spray gun for liquefied gas.
A Chinese patent with the application number of 201810509214.X discloses a device for quantitatively detecting the flexibility of an organic coating. And (3) quantitatively detecting the flexibility of the organic coating through traction bending.
Chinese patent with application number 201811416024.X discloses a coating material thermal shock performance detection experimental device and an experimental auxiliary device thereof, which are used for detecting the thermal shock service life of a coating through induction heating.
The prior art mentioned in the above patent describes a coating detection device and method for detecting the thermal insulation property of the coating, the flexibility of the coating, and the thermal shock life of the coating. The aerospace engine has the disadvantages of high manufacturing difficulty, long period and high cost, the cost of engine identification test run, particularly high-altitude simulation test run, is high (million-yuan starting), and the performance test of the engine material by using the engine test run, particularly the performance after batch production, is undoubtedly infeasible. How to economically, effectively and reliably detect the oxidation resistance protection capability, namely the oxidation resistance, of the coating is the first problem which needs to be solved for the development of the refractory alloy oxidation resistance coating and the key problem which needs to be solved for the engineering application of the alloy and the coating.
Disclosure of Invention
The application provides a device and a method for detecting high-temperature oxidation resistance of a coating, and aims to solve the problems that the high-temperature oxidation resistance of the coating under a high-temperature working condition of 1600-2000 ℃ is difficult to detect, the detection precision is low, and the cost is high in the prior art.
The technical scheme adopted by the application is as follows:
a device for detecting the high-temperature oxidation resistance of a coating comprises a detection platform, wherein a first electrode is vertically clamped on the detection platform in a sliding manner, the first electrode can horizontally slide on the detection platform, and a second electrode is vertically fixed in the detection platform; a coating sample is fixedly connected between the upper part of the first electrode and the upper part of the second electrode, a first cooling water sleeve is fixedly installed inside the first electrode, the first cooling water sleeve is respectively communicated with a first cooling water inlet pipe and a first cooling water outlet pipe, a second cooling water sleeve is fixedly installed inside the second electrode, and the second cooling water sleeve is respectively communicated with a second cooling water inlet pipe and a second cooling water outlet pipe; the electrode I and the electrode II are electrically connected with two ends of a power supply and a transformer, a power controller is further connected between the power supply and the transformer, the power controller is connected with a program-controlled instrument, the program-controlled instrument is connected with a temperature measuring instrument through a data line, a detection probe of the temperature measuring instrument is aligned to the middle part of the coating sample, and the program-controlled instrument is further connected with a computer through the data line for remote monitoring.
Preferably, an electrode sliding groove is formed in the detection platform, the first electrode is vertically clamped in the electrode sliding groove in a sliding mode through a limiting block, and a spring is arranged between the inner side of the electrode sliding groove and the side face, far away from the coating sample, of the first electrode.
Preferably, protruding rods are correspondingly arranged on the inner side of the electrode sliding groove and the side face, far away from the coating sample, of the first electrode, and two ends of the spring are respectively sleeved on the two protruding rods.
Preferably, the limiting block is of a flange-shaped structure sleeved outside the first electrode.
Preferably, an electrode mounting lug for mounting the coating sample is arranged at the upper part of the electrode I, and one end of the coating sample is fixedly clamped between the electrode mounting lug and the movable copper block I through a bolt I; and the upper part of the second electrode is provided with a second electrode mounting lug corresponding to the first electrode mounting lug, and the other end of the coating sample is fixedly clamped between the second electrode mounting lug and the second movable copper block through a second bolt.
Preferably, the first cooling water sleeve is arranged inside the first electrode, and the lower part of the first cooling water sleeve is fixedly connected with the first electrode through a first nut sleeved outside the bottom end of the first electrode; and the second cooling water sleeve is arranged inside the second electrode, and the lower part of the second cooling water sleeve is fixedly connected with the second electrode through a second nut sleeved outside the bottom end of the second electrode.
Preferably, the first cooling water inlet pipe and the first cooling water outlet pipe are respectively arranged at the bottom of the first cooling water sleeve, and the second cooling water inlet pipe and the second cooling water outlet pipe are respectively arranged at the bottom of the second cooling water sleeve.
Preferably, the thermometer is an infrared thermometer.
Another technical scheme adopted by the application is as follows:
according to the detection method of the coating high-temperature oxidation resistance detection device, the electrode II is vertically fixed on the detection platform, the electrode I is vertically clamped in the electrode sliding groove on the detection platform in a sliding mode through the limiting block, the spring capable of enabling the electrode I to horizontally slide is installed between the electrode sliding groove and the electrode I, and when a coating sample is heated and expanded, the electrode I moves leftwards to keep the coating sample not to deform; the first cooling water sleeve is arranged in the first electrode and fixedly connected through a first nut, the second cooling water sleeve is arranged in the second electrode and fixedly connected through a second nut, the first cooling water inlet pipe and the second cooling water inlet pipe are respectively connected with a cooling water source, the first cooling water outlet pipe and the second cooling water outlet pipe are connected into a drainage pool, or a cooling circulating water system can be used, cooling circulating water is communicated with the first cooling water inlet pipe and the second cooling water inlet pipe and is connected with the pool through a circulating pump, and the first cooling water outlet pipe and the second cooling water outlet pipe are communicated and drained into the pool; placing a coating sample between a first electrode and a second electrode, fixedly clamping one end of the coating sample between a first electrode mounting lug and a first movable copper block through a first bolt, and fixedly clamping the other end of the coating sample between a second electrode mounting lug and a second movable copper block through a second bolt; the first electrode and the second electrode are electrically connected with two ends of a power supply and a transformer, a power controller is connected between the power supply and the transformer, the power controller is connected with a program-controlled instrument, the program-controlled instrument is connected with a temperature measuring instrument through a data line, a detection probe of the temperature measuring instrument is aligned to the middle part of the coating sample, and the program-controlled instrument is connected with a computer through the data line for remote monitoring; opening a computer for remote monitoring operation, then opening a cooling water valve, controlling energization to start a heating program through the program controller, starting heating of a coating sample, detecting real-time temperature by the infrared thermometer and transmitting the real-time temperature to the program controller, automatically adjusting heating output power by the program controller according to the received real-time temperature, starting keeping constant temperature when the temperature rises to a set target detection value, and automatically adjusting the heating power output ratio by the program controller to control the temperature to be kept at a target detection temperature value if the temperature deviates due to surface state change of the coating sample in the constant temperature process; and in the constant temperature process, observing the state change of the coating on the surface of the coating sample, when the surface of the sample begins to generate convex spots, enabling the coating to lose efficacy, closing the heating program through the program control instrument, stopping detection, and recording the duration of constant temperature, wherein the duration of constant temperature without losing efficacy at the target detection temperature is the static high-temperature oxidation resistance of the coating at the target detection temperature.
The beneficial effects of adopting the technical scheme of the application are as follows:
1. the method for detecting the service life of the coating under the laboratory condition is provided, the number of times of identifying and trial run of the coating material of the high-temperature component of the aerospace engine can be effectively reduced, the development and production cost of the engine is reduced, the trial run cost is saved, and favorable conditions are provided for the development of the aerospace material technology.
2. The detectable temperature range is large, the detection temperature range is from room temperature to 2000 ℃, the data reliability is high, and the problem that the high-temperature static performance of the high-temperature oxidation-resistant coating at 1600-2000 ℃ is difficult to detect is solved.
3. Accurate temperature control is realized by adjusting output power, the temperature lifting speed is high, an infrared thermometer is adopted for temperature measurement, temperature detection and monitoring are accurate, a detection sample is directly exposed, the change of the coating can be observed at any time, the observation on the surface change of the coating is extremely convenient, the failure time of the coating can be accurately monitored, and the experiment and scientific research are extremely favorable.
4. The detection technology can be popularized in the civil field such as chemical industry, steel, energy and the like besides military and aerospace application, and has an important promotion effect on promoting high-end application and technical development of refractory metals.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a control schematic diagram of a device for detecting the high-temperature oxidation resistance of a coating according to the present invention;
FIG. 2 is a schematic structural diagram of a device for detecting high-temperature oxidation resistance of a coating according to the present invention;
FIG. 3 is a schematic view showing the structure of the connecting portion of the two electrodes and the coating sample in the direction A in FIG. 2;
illustration of the drawings:
the device comprises a detection platform, a spring, a limiting block, a first electrode, a coating sample, a second electrode, a cooling water sleeve, a second nut, a second cooling water outlet pipe, a second cooling water inlet pipe, a first cooling water sleeve, a first cooling water outlet pipe, a first cooling water inlet pipe, a first cooling water sleeve, a 12 nut, a first cooling water outlet pipe, a first cooling water inlet pipe, a 15 electrode mounting lug, a first movable copper block, a first electrode mounting lug, a second movable copper block, a first bolt, a second bolt, a 20 bolt, a 21 infrared thermometer, a 22 computer, a 23 program controller and a 24 power controller.
Detailed Description
Referring to fig. 1 and fig. 2, a control schematic diagram and a structural schematic diagram of a device for detecting the high-temperature oxidation resistance of a coating are shown.
The device for detecting the high-temperature oxidation resistance of the coating comprises a detection platform 1, wherein a first electrode 4 is vertically clamped on the detection platform 1 in a sliding manner, the first electrode 4 can horizontally slide on the detection platform 1, and a second electrode 6 is vertically fixed in the detection platform 1; a coating sample 5 is fixedly connected between the upper part of the first electrode 4 and the upper part of the second electrode 6, a first cooling water sleeve 11 is fixedly installed inside the first electrode 4, the first cooling water sleeve 11 is respectively communicated with a first cooling water inlet pipe 14 and a first cooling water outlet pipe 13, a second cooling water sleeve 7 is fixedly installed inside the second electrode 6, and the second cooling water sleeve 7 is respectively communicated with a second cooling water inlet pipe 10 and a second cooling water outlet pipe 9; the first electrode 4 and the second electrode 6 are electrically connected with two ends of a power supply and two ends of a transformer, a power controller 24 is further connected between the power supply and the transformer, the power controller 24 is connected with a program controller 23, the program controller 23 is connected with a temperature measuring instrument through a data line, a detection probe of the temperature measuring instrument is aligned to the middle part of the coating sample 5, and the program controller 23 is further connected with a computer 22 through the data line for remote monitoring.
The detection platform 1 is provided with an electrode sliding groove, the electrode I4 is vertically clamped in the electrode sliding groove in a sliding mode through the limiting block 3, the spring 2 is arranged between the inner side of the electrode sliding groove and the side face, far away from the coating sample 5, of the electrode I4, when the coating sample 5 is heated and expanded, the electrode I4 moves leftwards to compress the spring 2, the coating sample 5 can be guaranteed not to deform, and cracks are prevented from being generated on the coating sample 5 due to bending under pressure.
The inner side of the electrode sliding groove and the side face, far away from the coating sample 5, of the electrode I4 are correspondingly provided with convex rods, and two ends of the spring 2 are respectively sleeved on the two convex rods to fix the spring 2.
The limiting block 3 is of a flange-shaped structure sleeved outside the first electrode 4, and is simple and practical in limiting structure and convenient to assemble.
As shown in fig. 3, an electrode mounting lug 15 for mounting the coating sample 5 is arranged on the upper part of the electrode I4, and one end of the coating sample 5 is fixedly clamped between the electrode mounting lug 15 and the movable copper block I16 through a bolt I19; the upper part of the second electrode 6 is provided with a second electrode mounting lug 17 corresponding to the first electrode mounting lug 15, the other end of the coating sample 5 is fixedly clamped between the second electrode mounting lug 17 and the second movable copper block 18 through a second bolt 20, the connection is reliable, the conductivity of the movable copper block is good, the power consumption is low, the coating sample 5 can be conveniently heated by electrifying, the temperature rising speed of the coating sample 5 is high, the detection temperature of the coating sample 5 can reach 2000 ℃, and the coating sample 5 can be directly exposed outside to observe the coating change at any time, so that the coating test device is safe and easy to operate.
The cooling water sleeve I11 is arranged inside the electrode I4, and the lower part of the cooling water sleeve I11 is fixedly connected with the electrode I4 through a nut I12 sleeved outside the bottom end of the electrode I4; the cooling water sleeve II 7 is arranged inside the electrode II 6, the lower part of the cooling water sleeve II 7 is fixedly connected with the electrode II 6 through a nut II 8 sleeved outside the bottom end of the electrode II 6, the cooling water sleeve and the electrode are reliably fixed, and the electrode can be uniformly cooled in the electrifying process.
The cooling water inlet pipe 14 with the cooling water outlet pipe 13 set up respectively in the bottom of cooling water sleeve pipe 11, cooling water inlet pipe two 10 with the cooling water outlet pipe two 9 set up respectively in the bottom of cooling water sleeve pipe two 7, all set up and be convenient for connect cooling water and drainage pond in cooling water sleeve pipe bottom, be convenient for arrange the water pipe.
The temperature measuring instrument is an infrared temperature measuring instrument 21, the temperature measuring accuracy can reach +/-1 ℃, the temperature detection and monitoring are accurate, and the detectable temperature range is large.
According to the detection method of the coating high-temperature oxidation resistance detection device, the electrode II 6 is vertically fixed on the detection platform 1, the electrode I4 is vertically clamped in an electrode sliding groove on the detection platform 1 in a sliding manner through the limiting block 3, the spring 2 capable of enabling the electrode I4 to horizontally slide is arranged between the electrode sliding groove and the electrode I4, and when the coating sample 5 is heated and expanded, the electrode I4 moves leftwards to keep the coating sample 5 not deformed; the first cooling water sleeve 11 is arranged in the first electrode 4 and fixedly connected through a first nut 12, the second cooling water sleeve 7 is arranged in the second electrode 6 and fixedly connected through a second nut 8, the first cooling water inlet pipe 14 and the second cooling water inlet pipe 10 are respectively connected with a cooling water source, the first cooling water outlet pipe 13 and the second cooling water outlet pipe 9 are connected into a drainage pool, or a cooling circulating water system can be used, cooling circulating water is communicated with the first cooling water inlet pipe 14 and the second cooling water inlet pipe 10 and is connected with the pool through a circulating pump, and the first cooling water outlet pipe 13 and the second cooling water outlet pipe 9 are communicated and discharged into the pool; placing a coating sample 5 between a first electrode 4 and a second electrode 6, fixedly clamping one end of the coating sample 5 between a first electrode mounting lug 15 and a first movable copper block 16 through a first bolt 19, and fixedly clamping the other end of the coating sample 5 between a second electrode mounting lug 17 and a second movable copper block 18 through a second bolt 20; the first electrode 4 and the second electrode 6 are electrically connected with two ends of a power supply and two ends of a transformer, a power controller 24 is connected between the power supply and the transformer, the power controller 24 is connected with a program controller 23, the program controller 23 is connected with a thermodetector through a data line, a detection probe of the thermodetector is aligned to the middle part of the coating sample 5, and the program controller 23 is connected with a computer 22 through the data line for remote monitoring; the computer 22 is started to remotely monitor operation, then the cooling water valve is opened, the program controller 23 controls power-on to start a heating program, the coating sample 5 starts to be heated, the infrared thermometer 21 detects real-time temperature and transmits the real-time temperature to the program controller 23, the program controller 23 automatically adjusts heating output power according to the received real-time temperature, when the temperature rises to a set target detection value, the constant temperature is kept, and if the temperature deviates due to the change of the surface state of the coating sample 5 in the constant temperature process, the program controller 23 automatically adjusts the heating power output ratio to control the temperature to be kept at the target detection temperature value; and in the constant temperature process, observing the state change of the coating on the surface of the coating sample 5, when the surface of the sample begins to generate convex spots, enabling the coating to lose efficacy, closing the heating program through the program control instrument 23, stopping detection, and recording the duration of constant temperature, wherein the duration of constant temperature without losing efficacy at the target detection temperature is the static high-temperature oxidation resistance of the coating at the target detection temperature.
The invention uses an internal heating method, namely the coating sample is electrified and heated by low voltage and large current, and the accurate control of the detection temperature of the coating sample is realized by adjusting the output power of the current and the temperature measuring device. The invention has the advantages that: the temperature rise and fall speed is fast, the detection temperature range is from room temperature to 2000 ℃, the detectable temperature range is large, the problem that the high-temperature oxidation resistance of the coating under the high-temperature working condition of 1600-2000 ℃ is difficult to detect is solved, the temperature measuring device adopts an infrared thermometer, the temperature measuring accuracy can reach +/-1 ℃, the temperature detection and monitoring are accurate, the detection sample is directly exposed, the change of the coating can be observed at any time, the observation on the change of the surface of the coating is extremely convenient, the time for the coating to lose efficacy can be accurately monitored, the device and the detection method are extremely beneficial to experiments and scientific research, the automation and the accuracy are high, the power consumption is low, and the device and the detection method are safe.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (9)
1. The device for detecting the high-temperature oxidation resistance of the coating is characterized by comprising a detection platform (1), wherein a first electrode (4) is vertically clamped on the detection platform (1) in a sliding manner, the first electrode (4) can horizontally slide on the detection platform (1), and a second electrode (6) is vertically fixed in the detection platform (1); a coating sample (5) is fixedly connected between the upper part of the first electrode (4) and the upper part of the second electrode (6), a first cooling water sleeve (11) is fixedly installed inside the first electrode (4), the first cooling water sleeve (11) is respectively communicated with a first cooling water inlet pipe (14) and a first cooling water outlet pipe (13), a second cooling water sleeve (7) is fixedly installed inside the second electrode (6), and the second cooling water sleeve (7) is respectively communicated with a second cooling water inlet pipe (10) and a second cooling water outlet pipe (9); the electrode I (4) and the electrode II (6) are electrically connected with two ends of a power supply and two ends of a transformer, a power controller (24) is connected between the power supply and the transformer, the power controller (24) is connected with a program controller (23), the program controller (23) is connected with a thermodetector through a data line, a detection probe of the thermodetector is aligned to the middle part of the coating sample (5), and the program controller (23) is further connected with a computer (22) through the data line for remote monitoring.
2. The device for detecting the high-temperature oxidation resistance of the coating according to claim 1, wherein an electrode sliding groove is formed in the detection platform (1), the first electrode (4) is vertically clamped in the electrode sliding groove in a sliding mode through a limiting block (3), and a spring (2) is arranged between the inner side of the electrode sliding groove and the side face, far away from the coating sample (5), of the first electrode (4).
3. The device for detecting the high-temperature oxidation resistance of the coating according to claim 2, wherein protruding rods are correspondingly arranged on the inner side of the electrode sliding groove and the side face, far away from the coating sample (5), of the electrode I (4), and two ends of the spring (2) are respectively sleeved on the two protruding rods.
4. The device for detecting the high-temperature oxidation resistance of the coating according to claim 2, wherein the limiting block (3) is of a flange-shaped structure sleeved outside the first electrode (4).
5. The device for detecting the high-temperature oxidation resistance of the coating according to claim 1, wherein an electrode mounting lug (15) for mounting the coating sample (5) is arranged at the upper part of the electrode I (4), and one end of the coating sample (5) is fixedly clamped between the electrode mounting lug (15) and the movable copper block I (16) through a bolt I (19); and a second electrode mounting lug (17) is arranged on the upper part of the second electrode (6) and corresponds to the first electrode mounting lug (15), and the other end of the coating sample (5) is fixedly clamped between the second electrode mounting lug (17) and the second movable copper block (18) through a second bolt (20).
6. The device for detecting the high-temperature oxidation resistance of the coating according to claim 1, wherein the first cooling water sleeve (11) is arranged inside the first electrode (4), and the lower part of the first cooling water sleeve (11) is fixedly connected with the first electrode (4) through a first nut (12) sleeved outside the bottom end of the first electrode (4); and the second cooling water sleeve (7) is arranged inside the second electrode (6), and the lower part of the second cooling water sleeve (7) is fixedly connected with the second electrode (6) through a second nut (8) sleeved outside the bottom end of the second electrode (6).
7. The device for detecting the high-temperature oxidation resistance of the coating according to claim 1, wherein the first cooling water inlet pipe (14) and the first cooling water outlet pipe (13) are respectively arranged at the bottom of the first cooling water sleeve (11), and the second cooling water inlet pipe (10) and the second cooling water outlet pipe (9) are respectively arranged at the bottom of the second cooling water sleeve (7).
8. The device for detecting the high-temperature oxidation resistance of the coating according to claim 1, wherein the temperature measuring instrument is an infrared temperature measuring instrument (21).
9. The detection method of the detection device for the high-temperature oxidation resistance of the coating according to any one of claims 1 to 8, characterized in that the second electrode (6) is vertically fixed on the detection platform (1), the first electrode (4) is vertically slidably clamped in an electrode sliding groove on the detection platform (1) through a limiting block (3), a spring (2) capable of enabling the first electrode (4) to horizontally slide is installed between the electrode sliding groove and the first electrode (4), and when the coating sample (5) is heated and expanded, the first electrode (4) moves leftwards to keep the coating sample (5) not deformed; the cooling water sleeve I (11) is arranged in the electrode I (4) and fixedly connected through a nut I (12), the cooling water sleeve II (7) is arranged in the electrode II (6) and fixedly connected through a nut II (8), the cooling water inlet pipe I (14) and the cooling water inlet pipe II (10) are respectively connected with a cooling water source, the cooling water outlet pipe I (13) and the cooling water outlet pipe II (9) are connected into a drainage pool, a cooling circulating water system can also be used, cooling circulating water is communicated with the cooling water inlet pipe I (14) and the cooling water inlet pipe II (10) and is connected with the pool through a circulating pump, and the cooling water outlet pipe I (13) and the cooling water outlet pipe II (9) are communicated and discharged into the pool; placing the coating sample (5) between the first electrode (4) and the second electrode (6), fixedly clamping one end of the coating sample (5) between the first electrode mounting lug (15) and the first movable copper block (16) through a first bolt (19), and fixedly clamping the other end of the coating sample (5) between the second electrode mounting lug (17) and the second movable copper block (18) through a second bolt (20); the first electrode (4) and the second electrode (6) are electrically connected with two ends of a power supply and two ends of a transformer, a power controller (24) is connected between the power supply and the transformer, the power controller (24) is connected with a program controller (23), the program controller (23) is connected with a thermodetector through a data line, a detection probe of the thermodetector is aligned to the middle part of the coating sample (5), and the program controller (23) is connected with a computer (22) through the data line for remote monitoring; opening a computer (22) for remote monitoring operation, then opening a cooling water valve, controlling energization to start a heating program through a program controller (23), starting heating of a coating sample (5), detecting real-time temperature by an infrared thermometer (21) and transmitting the real-time temperature to the program controller (23), automatically adjusting heating output power by the program controller (23) according to the received real-time temperature, starting to keep constant temperature when the temperature rises to a set target detection value, and automatically adjusting the heating power output ratio by the program controller (23) to control the temperature to be kept at a target detection temperature value if the temperature deviates due to surface state change of the coating sample (5) in the constant temperature process; and in the constant temperature process, observing the change of the coating state on the surface of the coating sample (5), when the surface of the sample begins to generate convex spots, enabling the coating to lose efficacy, closing the heating program through the program control instrument (23), stopping detection, recording the duration of constant temperature, wherein the duration of constant temperature without losing efficacy of the coating at the target detection temperature is the static high-temperature oxidation resistance of the coating at the target detection temperature.
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| CN202010570413.9A CN111781227B (en) | 2020-06-19 | 2020-06-19 | Device and method for detecting high-temperature oxidation resistance of coating |
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| CN202010570413.9A CN111781227B (en) | 2020-06-19 | 2020-06-19 | Device and method for detecting high-temperature oxidation resistance of coating |
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