CN109900629B - Environment device and test method for corrosion fatigue test of metal material - Google Patents
Environment device and test method for corrosion fatigue test of metal material Download PDFInfo
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- CN109900629B CN109900629B CN201910171512.7A CN201910171512A CN109900629B CN 109900629 B CN109900629 B CN 109900629B CN 201910171512 A CN201910171512 A CN 201910171512A CN 109900629 B CN109900629 B CN 109900629B
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- 238000005260 corrosion Methods 0.000 title claims abstract description 37
- 230000007797 corrosion Effects 0.000 title claims abstract description 37
- 238000009661 fatigue test Methods 0.000 title claims abstract description 27
- 239000007769 metal material Substances 0.000 title claims abstract description 20
- 238000010998 test method Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000003860 storage Methods 0.000 claims abstract description 27
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000007613 environmental effect Effects 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Abstract
The invention relates to an environment device and a test method for corrosion fatigue test of a metal material, and belongs to the technical field of corrosion fatigue test equipment of the metal material in the metallurgical industry. The technical proposal is as follows: the top of the environment box (9) is provided with an environment box upper cover (2), the bottom of the environment box (9) is provided with a sleeve (12), the sleeve (12) is provided with external threads, a rubber plug fixing nut (11) is connected to the sleeve (12) in a threaded manner, and holes are respectively formed in the rubber plug (10) and the environment box upper cover (2); the peristaltic pump (7) with controllable flow is connected with a water inlet (8) of an environment box (9) through a water inlet pipe, a solution storage container (13) is connected with a water outlet (3) of the environment box (9) through a water return pipe, a filtering unit (4) is arranged on the water return pipe, and a constant temperature unit (5) and a PH value detector (6) are arranged in the solution storage container (13). The beneficial effects of the invention are as follows: the sealing performance is good; the real-time monitoring of key parameters such as flow, temperature, PH value and the like can be realized.
Description
Technical Field
The invention relates to an environment device and a test method for corrosion fatigue test of a metal material, and belongs to the technical field of corrosion fatigue test equipment of the metal material in the metallurgical industry.
Background
The dual effects of corrosion and fatigue of the metal material are the main failure modes of engineering structural materials, particularly the performance of the metal material is more obvious in the fields of aerospace, ocean engineering, nuclear power and the like, the performance evaluation of the metal material under the environmental working condition is more and more valued in the industry, the conventional corrosion and fatigue single evaluation cannot meet the requirements, and the fatigue performance test under the corrosion environment is more and more important.
The key point of the corrosion fatigue test of the metal material is the accurate simulation of the corrosion environment. At present, a plurality of environment simulation devices for corrosion fatigue testing are disclosed at home and abroad, and mainly the problems that corrosive liquid is easy to leak, test parameters cannot be monitored in real time and the like exist, so that the accuracy of test results is affected.
Disclosure of Invention
The invention aims to provide an environment device and a test method for corrosion fatigue test of metal materials, which have good sealing performance, can realize real-time monitoring and adjustment of key parameters such as flow, temperature, PH value and the like, improve the accuracy of test results and solve the problems in the background technology.
The technical scheme of the invention is as follows:
the environment device for the corrosion fatigue test of the metal material comprises an environment box upper cover, a water outlet, a filtering unit, a constant temperature unit, a PH value detector, a peristaltic pump with controllable flow, a water inlet, an environment box, a rubber plug fixing nut, a sleeve and a solution storage container, wherein the environment box upper cover is arranged at the top of the environment box; the environment box is provided with a water inlet and a water outlet, the peristaltic pump with controllable flow is connected with the water inlet of the environment box through a water inlet pipe, the solution storage container is connected with the water outlet of the environment box through a water return pipe, the water return pipe is provided with a filtering unit, and the solution storage container is internally provided with a constant temperature unit and a PH value detector.
The center line of the hole on the upper cover of the environment box is overlapped with the center line of the hole on the upper cover of the environment box.
The environment box is a cylindrical container made of acid and alkali resistant transparent materials, and the solution storage container is a corrosion resistant container.
The water inlet of the environment box is arranged at the lower part of the environment box, and the water outlet of the environment box is arranged at the upper part of the environment box.
The constant temperature unit in the solution storage container comprises a heating device, a circulating pump, a thermometer and a corrosion-resistant guide pipe, one end of the corrosion-resistant guide pipe is connected with the peristaltic pump with controllable flow, and the other end of the corrosion-resistant guide pipe is connected with the circulating pump.
The controllable flow peristaltic pump, the heating device in the constant temperature unit and the filtering unit in the water return pipe are all known in the art, wherein the controllable flow peristaltic pump has a flow regulating function and is mainly used for providing circulating power for the solution; the heating device in the constant temperature unit is mainly used for heating the solution in the solution storage container to keep the solution at a certain constant temperature; the main function of the filter unit in the return pipe is to ensure that the liquid flowing into the solution storage container has good cleanliness.
A method for corrosion fatigue testing of metallic materials, employing an environmental apparatus for corrosion fatigue testing of metallic materials as defined above, comprising the steps of:
(1) processing a sample according to the national standard, and carrying out surface polishing treatment on the sample;
(2) placing the sample in an ultrasonic container filled with acetone, cleaning for 10-15 minutes, and then cleaning the surface of the sample;
(3) respectively fixing two ends of a sample in holes of an upper cover of an environment box and a rubber plug, and smearing silica gel between the sample and the rubber plug and between the rubber plug and a sleeve for sealing;
(4) tightening a rubber plug fixing nut on the sleeve;
(5) mounting two ends of a sample on a fatigue testing machine;
(6) adding an etching solution into a solution storage container, wherein the mass percentage of the salinity in the etching solution is 3.34%; the specific gravity of the corrosive liquid is 1.02-1.04, the PH is 7.8-8.5, and the temperature is 30-42 ℃;
(7) and starting the peristaltic pump with controllable flow and the fatigue testing machine, and starting the corrosion fatigue test on the sample according to the national standard until the test is ended.
The beneficial effects of the invention are as follows: the sample and the environment box are subjected to multiple leak-proof sealing through the rubber plug, the rubber plug fixing nut and the silica gel, so that the leak-proof sealing performance is good. The peristaltic pump with controllable flow not only provides liquid circulation power, but also has a flow regulating function; the whole system can realize the real-time monitoring of key parameters such as flow, temperature, PH value and the like, and is convenient for real-time adjustment according to actual conditions in the test, so that the test process meets the standard requirements better.
Drawings
FIG. 1 is a partial schematic view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
in the figure: sample 1, environment case upper cover 2, delivery port 3, filter unit 4, constant temperature unit 5, PH value meter 6, controllable flow peristaltic pump 7, liquid flow direction adjusting button 7-1, liquid flow adjusting button 7-2, water inlet 8, environment case 9, rubber stopper 10, rubber stopper fixation nut 11, sleeve 12, solution storage container 13.
Detailed Description
The invention is further illustrated by way of example with reference to the accompanying drawings.
Referring to fig. 1 and 2, an environmental device for corrosion fatigue test of metal materials comprises an environmental box upper cover 2, a water outlet 3, a filtering unit 4, a constant temperature unit 5, a PH value detector 6, a peristaltic pump 7 with controllable flow, a water inlet 8, an environmental box 9, a rubber plug 10, a rubber plug fixing nut 11, a sleeve 12 and a solution storage container 13, wherein the environmental box upper cover 2 is arranged at the top of the environmental box 9, the sleeve 12 communicated with the environmental box 9 is arranged at the bottom of the environmental box 9, the sleeve 12 and the environmental box 9 are integrated, the sleeve 12 is provided with external threads, the rubber plug fixing nut 11 is connected with the sleeve 12 in a threaded manner, the rubber plug 10 is plugged in the sleeve 12, and holes matched with a sample are respectively arranged on the rubber plug 10 and the environmental box upper cover 2; the environment box 9 is provided with a water inlet 8 and a water outlet 3, the peristaltic pump 7 with controllable flow is connected with the water inlet 8 of the environment box 9 through a water inlet pipe, the solution storage container 13 is connected with the water outlet 3 of the environment box 9 through a water return pipe, the water return pipe is provided with a filtering unit 4, and the solution storage container 13 is internally provided with a constant temperature unit 5 and a PH value detector 6.
In this embodiment, referring to fig. 1 and 2, the environmental chamber 9 is a cylindrical container made of an acid and alkali resistant transparent material, and the solution storage container 13 is a corrosion resistant container. The water inlet 8 of the environment box 9 is arranged at the lower part of the environment box 9, and the water outlet 3 of the environment box 9 is arranged at the upper part of the environment box 9. The center line of the hole in the rubber stopper 10 and the upper cover 2 of the environmental tank coincides.
The peristaltic pump 7 with controllable flow has the functions of flow direction adjustment and flow rate adjustment, and is connected with the water inlet 8 of the environment box 9 through a rubber tube; the filtering unit 4 is connected with the water outlet 3 of the environment box 9 through a rubber pipe. The solution PH meter 6 and the constant temperature unit 5 are installed in the solution storage container 13. The filtering unit 4 is installed on the return line to ensure good cleanliness of the liquid flowing into the solution storage container 13. The constant temperature unit 5 in the solution storage container 13 comprises a heating device, a circulating pump, a thermometer and a corrosion-resistant conduit, one end of the corrosion-resistant conduit is connected with the peristaltic pump 7 with controllable flow, and the other end of the corrosion-resistant conduit is connected with the circulating pump.
The solution flows through the way of the solution storage container 13, the peristaltic pump 7 with controllable flow, the water inlet pipe, the environment box 9, the water return pipe, the filtering unit 4 and the solution storage container 13.
Processing and manufacturing a sample: the processing treatment of the corrosion fatigue test sample is critical, the test sample is processed into dumbbell-shaped round bars according to the requirements of GB/T20120.0-2006, the test sample size is phi 5 mm-phi 18mm, and the surface polishing treatment is carried out. Before the test, degreasing treatment is firstly carried out, acetone is used for cleaning for 10-15 minutes in an ultrasonic container, and then an electric hair dryer is used for drying the surface of the sample.
Etching solution in solution storage container 13: the seawater comprises the components of 3.34 mass percent of salinity, 1.02-1.04 specific gravity, 7.8-8.5 PH and 30-42 ℃.
In the test, the upper end of the sample 1 is fixed in a hole of the upper cover 2 of the environment box, the lower end of the sample 1 passes through the hole in the rubber plug 10, the whole of the sample 1 and the rubber plug 10 is plugged into the sleeve 12 of the environment box 9, and the rubber plug 10 and the sleeve 12 at the bottom of the environment box 9 realize a one-time leakage-proof function through extrusion. The rubber plug fixing nut 11 is screwed on the sleeve 12 of the environment box 9 to realize secondary leakage prevention, silica gel is coated 704 between the sample 1 and the rubber plug 10 and between the rubber plug 10 and the sleeve 12 for sealing, and finally, two ends of the sample are mounted on a fatigue testing machine, and fatigue tests are carried out according to national standards.
Claims (4)
1. An environmental device for corrosion fatigue test of metal materials, which is characterized in that: the device comprises an environment box upper cover (2), a water outlet (3), a filtering unit (4), a constant temperature unit (5), a pH value detector (6), a peristaltic pump (7) with controllable flow, a water inlet (8), an environment box (9), a rubber plug (10), a rubber plug fixing nut (11), a sleeve (12) and a solution storage container (13), wherein the environment box upper cover (2) is arranged at the top of the environment box (9), the sleeve (12) communicated with the environment box (9) is arranged at the bottom of the environment box (9), the sleeve (12) and the environment box (9) are of an integrated structure, the sleeve (12) is provided with external threads, the rubber plug fixing nut (11) is connected onto the sleeve (12) in a threaded manner, the rubber plug (10) is plugged into the sleeve (12), and holes matched with a sample are respectively arranged on the rubber plug (10) and the environment box upper cover (2); the environment box (9) is provided with a water inlet (8) and a water outlet (3), the peristaltic pump (7) with controllable flow is connected with the water inlet (8) of the environment box (9) through a water inlet pipe, the solution storage container (13) is connected with the water outlet (3) of the environment box (9) through a water return pipe, the water return pipe is provided with a filtering unit (4), and the solution storage container (13) is internally provided with a constant temperature unit (5) and a pH value detector (6);
the water inlet (8) of the environment box (9) is arranged at the lower part of the environment box (9), and the water outlet (3) of the environment box (9) is arranged at the upper part of the environment box (9);
the constant temperature unit (5) in the solution storage container (13) comprises a heating device, a circulating pump, a thermometer and a corrosion-resistant guide pipe, one end of the corrosion-resistant guide pipe is connected with the peristaltic pump (7) with controllable flow, and the other end of the corrosion-resistant guide pipe is connected with the circulating pump.
2. An environmental apparatus for corrosion fatigue testing of metallic materials according to claim 1, wherein: the center line of the hole on the rubber plug (10) and the center line of the hole on the upper cover (2) of the environment box are overlapped.
3. An environmental apparatus for corrosion fatigue testing of metallic materials according to claim 1, wherein: the environment box (9) is a cylindrical container made of acid-base resistant transparent materials, and the solution storage container (13) is a corrosion-resistant container.
4. A method for corrosion fatigue testing of a metallic material, characterized by: an environmental apparatus for corrosion fatigue test of metallic materials according to any one of claims 1-3, comprising the steps of:
(1) processing a sample according to the national standard, and carrying out surface polishing treatment on the sample;
(2) placing the sample in an ultrasonic container filled with acetone, cleaning for 10-15 minutes, and then cleaning the surface of the sample;
(3) two ends of a sample are respectively fixed in holes of an upper cover (2) of an environment box and a rubber plug (10), and silica gel is smeared between the sample and the rubber plug (10) and between the rubber plug (10) and a sleeve (12) for sealing;
(4) a rubber plug fixing nut (11) on the sleeve (12) is screwed up;
(5) mounting two ends of a sample on a fatigue testing machine;
(6) adding an etching solution into a solution storage container (13), wherein the mass percentage of the salinity in the etching solution is 3.34%; the specific gravity of the corrosive liquid is 1.02-1.04, the pH is 7.8-8.5, and the temperature is 30-42 ℃;
(7) and starting a peristaltic pump (7) with controllable flow and a fatigue testing machine, and starting a corrosion fatigue test on the sample according to the national standard until the test is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910171512.7A CN109900629B (en) | 2019-03-07 | 2019-03-07 | Environment device and test method for corrosion fatigue test of metal material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910171512.7A CN109900629B (en) | 2019-03-07 | 2019-03-07 | Environment device and test method for corrosion fatigue test of metal material |
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| Publication Number | Publication Date |
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| CN109900629A CN109900629A (en) | 2019-06-18 |
| CN109900629B true CN109900629B (en) | 2024-03-22 |
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| CN110553924A (en) * | 2019-09-11 | 2019-12-10 | 哈尔滨工业大学 | test device and method for realizing corrosion-creep coupling of fiber composite material |
| CN111157383A (en) * | 2019-12-25 | 2020-05-15 | 西南交通大学 | Material stress corrosion test system and method capable of accurately controlling corrosion conditions |
| CN111426572A (en) * | 2020-03-13 | 2020-07-17 | 天津大学 | Constant-load stress corrosion on-line observation test device under hydrofluoric acid environment |
| CN113237784A (en) * | 2021-03-22 | 2021-08-10 | 安徽工程大学 | Device and method for testing frictional wear performance of magnetic fluid |
| CN113624669A (en) * | 2021-07-30 | 2021-11-09 | 中车工业研究院有限公司 | Metal corrosion fatigue crack propagation testing device and method |
| CN113624670A (en) * | 2021-07-30 | 2021-11-09 | 中车工业研究院有限公司 | Metal corrosion fatigue testing device and method |
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