CN113029925A - Coastal atmospheric corrosion acceleration test device and method - Google Patents
Coastal atmospheric corrosion acceleration test device and method Download PDFInfo
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- CN113029925A CN113029925A CN202110279095.5A CN202110279095A CN113029925A CN 113029925 A CN113029925 A CN 113029925A CN 202110279095 A CN202110279095 A CN 202110279095A CN 113029925 A CN113029925 A CN 113029925A
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- 238000012360 testing method Methods 0.000 title claims abstract description 94
- 230000007797 corrosion Effects 0.000 title claims abstract description 59
- 238000005260 corrosion Methods 0.000 title claims abstract description 59
- 230000001133 acceleration Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title abstract description 14
- 239000007921 spray Substances 0.000 claims abstract description 17
- 150000003839 salts Chemical class 0.000 claims abstract description 11
- 238000005286 illumination Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 239000013535 sea water Substances 0.000 claims description 43
- 229910052724 xenon Inorganic materials 0.000 claims description 7
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 6
- 229910052753 mercury Inorganic materials 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 239000012267 brine Substances 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 2
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- 239000000463 material Substances 0.000 abstract description 17
- 238000013461 design Methods 0.000 abstract description 8
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- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010998 test method Methods 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
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- 238000005498 polishing Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910002588 FeOOH Inorganic materials 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 241000190070 Sarracenia purpurea Species 0.000 description 1
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- 238000007654 immersion Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- 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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- 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
- G01N17/004—Investigating resistance of materials to the weather, to corrosion, or to light to light
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Abstract
The invention belongs to the technical field of marine atmospheric corrosion tests, and particularly relates to a coastal atmospheric corrosion acceleration test device and a method, under an outdoor environment, according to a simulated regional natural atmospheric environment, salt spray amount and illumination type and frequency are periodically regulated and controlled through automatic control, the corrosion and aging rate of a material under the coastal atmospheric environment is accelerated through two factors, an acceleration result is better consistent with a long-term outdoor exposure test and better in controllability, and has certain contrast with the outdoor natural exposure test, and the acceleration test result can be widely applied to accelerated corrosion prediction and corrosion protection design of typical marine materials, marine engineering facility metal materials, coating materials and the like in the coastal environment, so that a design basis is provided for corrosion protection of the material, and the device and the method have obvious economic benefits and an industry development promoting effect.
Description
The technical field is as follows:
the invention belongs to the technical field of marine atmospheric corrosion tests, and particularly relates to a coastal atmospheric corrosion accelerated test device and method, which are widely applied to accelerated corrosion prediction of typical marine materials, marine engineering facility metal materials, coating materials and the like in a coastal environment.
Background art:
atmospheric corrosion is an important form of corrosion for materials, particularly coastal areas where atmospheric corrosion of metallic materials is particularly severe. The atmospheric exposure test period is long, and can reach dozens of years, which is very unfavorable for the evaluation and screening of new materials. Therefore, an accurate short-term acceleration test is established to simulate the outdoor long-term exposure test result, and further technical support is provided for material protection design, which is very important. At present, a plurality of short-term accelerated test methods for atmospheric exposure are available, mainly including a damp-heat test method, a salt spray test method, a periodic spraying method, a multi-factor circulation composite method and the like, and are generally carried out indoors, so that material corrosion is accelerated to a certain extent, the development of industrial technology is promoted, however, the indoor environment avoids the influence of conditions such as harmful pollutants, harmful gases and the like in the atmosphere, and the test result is greatly different from the actual atmospheric corrosion. For example, Mitsubishi heavy industry company in Japan uses different corrosive media according to the test area, adds ultraviolet irradiation, simulates and accelerates the corrosion of metal materials by a damp-heat test method, removes sulfur dioxide in the media for coastal clean areas, and removes sodium chloride for internal industrial areas. A number of test results indicate that the accelerated test method described above has significant acceleration, but the corrosion products tend to be inconsistent with the atmospheric exposure test.
The core problem of the atmospheric corrosion accelerated test in the prior art is that the correlation between the accelerated test and the atmospheric exposure test is poor, the indoor accelerated test focuses more on the influence of single factors such as temperature, humidity, medium types and concentrations, ultraviolet rays and the like, and the reduction degree of atmospheric characteristics in a simulation area is low, so that corrosion products in the simulation test, particularly initial corrosion products, are difficult to be consistent. The formation, type and structure of the initial corrosion product play a key role in the subsequent development of atmospheric corrosion, and the adoption of an outdoor accelerated corrosion test is one of effective ways for solving the problem. For example, chinese patent 201610525908.3 discloses an atmospheric corrosion accelerated test method, which includes the following steps: (1) firstly, designing an acceleration test device, wherein the test device comprises a machine body, a test hanging frame, a hanging frame lifting device and a controller, wherein the machine body comprises a support frame, a water storage tank arranged at the lower part of the support frame, a rain shielding plate arranged at the upper end of the support frame and a water inlet and drainage mechanism; (2) cutting a sample wire into a rectangular size, polishing the sample wire by using sand paper according to requirements, and fixing the sample wire on a test hanging frame, wherein four corners of the sample are respectively fixed by using a PVC plate and fastening screws; so as to prevent the sample from contacting with the sample hanging frame and avoid the influence of galvanic corrosion on the acceleration process; (3) carrying out an accelerated corrosion test in an outdoor environment, specifically, switching on a power supply, and controlling a water inlet and drainage mechanism to work by a controller to fill seawater into a water storage tank; then, carrying out a dry-wet cycle corrosion test, wherein one process of the dry-wet cycle corrosion test comprises the following steps: the controller controls the hanger lifting device to place the test hanger into the water storage tank and immerse the test hanger in the seawater for T1; then the test rack is lifted in the air for drying, and the drying time is T2; (4) and repeating the dry-wet cycle corrosion test flow until a specified test period, completing the accelerated test, and sampling to analyze the corrosion condition. The outdoor atmospheric corrosion accelerated test device disclosed in the chinese patent 200420055860.7 comprises an exposure frame, an atomization device composed of a water pump, a water tank, a water purifier and a water outlet pipe with a nozzle, wherein the water pump is electrically connected with an automatic spray control device, an inlet pipe of the water pump is communicated to the bottom of the water tank, a water outlet pipeline of the water pump is divided into two paths, one path is connected with the nozzle through the water outlet pipe, and the other path is used as return water and enters the water tank through a valve; the water tank is connected with the water purifier through a pipeline, the lower part of the water tank is provided with a water outlet, the upper part of the water tank is provided with an overflow port, the water purifier is provided with a water inlet and a water outlet, and the water inlet is connected with a tap water pipeline. The outdoor accelerated corrosion test usually adopts fresh water spraying or seawater periodic immersion, and has the advantages of single control condition, slow acceleration and limited application environment. Therefore, a coastal atmosphere corrosion acceleration test device and method are researched and designed, a design basis is provided for corrosion protection of materials, and remarkable economic benefits and industry development promotion effects are achieved.
The invention content is as follows:
the invention aims to overcome the defects in the prior art, and seeks to design a coastal atmospheric corrosion acceleration test device and method, wherein the device and method are used for simulating an atmospheric environment, periodically spraying salt mist and enhancing the illumination intensity under an outdoor environment, accelerating the corrosion rate of a material under the coastal atmospheric environment and providing a design basis for corrosion protection of the material.
In order to achieve the purpose, the main body structure of the coastal atmospheric corrosion acceleration test device comprises a control cabinet, a test bed, a seawater tank, a seawater pump, a water filling port, a water outlet, a seawater cup, a water pipe, a spray head, a fixed plate, a slide rail, a slide way, a lifting frame, a sample fixing frame, a light source frame and a light source; the switch board that mutual independence set up is connected with the test bench electricity, be provided with sea water tank and sea water pump on the side of test bench, the upper portion of sea water tank is provided with the water filling port, the lower part is provided with the outlet, sea water tank passes through sea water pump and water piping connection that sets up on the another side of test bench, the water pipe is connected with the atomising head, the atomising head is connected with the fixed plate, fixed plate and sliding rail connection, the both ends of slide rail are connected with the slide respectively, the both ends of slide are connected with the crane respectively, the crane sets up on the sample mount, the sample mount sets up on the top surface of test bench, still be provided with the light source frame on the test bench, be.
When the coastal atmospheric corrosion acceleration test device related by the invention is used for testing, diluted water aqua of artificial seawater, offshore natural seawater in a test area or the first two kinds of seawater is selected as a medium, and is injected into a seawater tank for filtration and high-temperature sterilization treatment; the test period is 4-6 months, salt fog is sprayed according to multiplying power according to the atmospheric salinity and the illumination characteristics of the simulation test area, and the irradiation of a light source is strengthened: at a temperature of 0: 00-24: 00 within the daily test period, salt spray is sprayed for 1 time every 30min or every 1-6 hours, and the light source adopts the continuous irradiation mode, wherein the irradiation mode is that the irradiation is continuously carried out in the daytime, is closed at night or is divided into 3-6 stages, and the irradiation time is 1-7 hours in each stage.
Compared with the prior art, the invention can periodically regulate and control the salt spray amount and the illumination type and frequency by automatic control according to the simulated regional natural atmospheric environment in the outdoor environment, accelerate the corrosion and aging rate of the material in the coastal atmospheric environment by two factors, has better consistency with the long-term outdoor exposure test and better controllability, has certain contrast with the outdoor natural exposure test, and can be widely applied to the accelerated corrosion prediction and corrosion protection design of typical ship materials, marine engineering facility metal materials, coating materials and the like in the coastal environment, thereby providing design basis for the corrosion protection of the material and having obvious economic benefit and industry development promoting effect.
Description of the drawings:
FIG. 1 is a schematic diagram of the principle of the main structure of a coastal atmospheric corrosion acceleration test device according to the present invention.
The specific implementation mode is as follows:
the invention is further described below by way of an embodiment example in conjunction with the accompanying drawings.
Example 1:
the invention relates to a main body structure of a coastal atmosphere corrosion acceleration test device, which comprises a control cabinet 1, a test bed 2, a seawater tank 3, a seawater pump 4, a water filling port 5, a water discharging port 6, a seawater cup 7, a water pipe 8, a spray head 9, a fixing plate 10, a slide rail 11, a slide rail 12, a lifting frame 13, a sample fixing frame 14, a light source frame 15 and a light source 16; the switch board 1 that mutual independence set up is connected with test bench 2 electricity, be provided with sea water tank 3 and sea water pump 4 on one side of test bench 2, the upper portion of sea water tank 3 is provided with water filling port 5, the lower part is provided with outlet 6, sea water tank 3 passes through sea water pump 4 and is connected with sea water cup 7 and the water pipe 8 that sets up on 2 another sides of test bench, water pipe 8 is connected with atomising head 9, atomising head 9 is connected with fixed plate 10, fixed plate 10 is connected with slide rail 11, slide rail 11's both ends are connected with slide 12 respectively, slide 12's both ends are connected with crane 13 respectively, crane 13 sets up on sample mount 14, sample mount 14 sets up on the top surface of test bench 2, still be provided with light source frame 15 on the test bench 2, be provided with light source 16 on the light.
The control cabinet 1 controls the seawater pump 4 and the spray head 9 to periodically absorb water and spray through automatic software, and controls the light source 16 to enhance illumination; the water pipe 8 is a flexible water pipe; the spray head 9 can freely move and be positioned in a plane through the matching operation of the control cabinet 1, the slide rail 11 and the slide rail 12, and salt mist is uniformly sprayed on the surface of the test sample 100; the spray head 9 can be immersed into the seawater cup 7 filled with seawater through the matching operation of the slide rail 11, the slide way 12 and the lifting frame 13 so as to prevent the blockage of brine crystallization during standby; the light source 16 comprises a mercury lamp and a xenon lamp, which respectively reinforce ultraviolet irradiation and sunlight irradiation, during the test, the mercury lamp or the xenon lamp is selected according to the illumination characteristics of the test region, the mercury lamp is selected for irradiation acceleration along the tropical sea, and the xenon lamp is selected for irradiation acceleration along the temperate sea.
Example 2:
the technological process of the coastal atmospheric corrosion accelerated test method related by the embodiment is as follows:
(1) processing a sample:
selecting a 921A low alloy steel plate with the thickness of 100mm multiplied by 50mm multiplied by 3mm as a sample 100, preparing 3 parallel samples in addition, polishing the surfaces of the sand blasting sample 100 and the parallel samples, removing oxide skin according to acid cleaning, printing steel grade, removing oil by acetone, dehydrating by alcohol, placing in a dryer for 24 hours, and then weighing the original weight;
(2) and (3) testing:
the average of the chlorine ion deposition amount is about 14mg/m according to the offshore of Qingdao2The annual average solar radiation dose per day is about 16500KJ/m2The test period was set to 4 months, at 0: 00-24: 00 in a daily test period, adopting natural seawater (salinity of 32.3 per thousand) near the sea of Qingdao, filtering, sterilizing, diluting by 1000 times, and obtaining chloride ions of about 19.6g/m3The amount of sprayed salt was set to 1ml per sample and 1ml per 4 hours, and the amount of deposited chloride ions was set to 2400mg/m2The daily deposition amount is 171 times, xenon lamp irradiation is selected, the power is 260W, and the irradiation area is 0.65m2Irradiating in 6 stages for 2 hrThe amount is 17200KJ/m2A day; as a comparison, an atmospheric exposure test was performed simultaneously, each check was performed every morning and evening, and the apparent change in appearance or the special cases that occurred were recorded;
(3) evaluation:
the method comprises the following steps of evaluating by analyzing sample weight loss, corrosion morphology and corrosion product results, cleaning by referring to a preparation, cleaning and evaluation specified method of JB/T6074 corrosion sample, calculating the corrosion rate of an outdoor accelerated corrosion test and an atmospheric exposure test by sample weight loss, and displaying the results: the corrosion product of the accelerated test of the embodiment is obviously thicker than that of the contemporaneous exposure test, and the outdoor accelerated corrosion weight loss is 3 times that of the contemporaneous exposure test; the main components of the corrosion products after the accelerated test and the contemporaneous exposure test are Fe2O3、Fe3O4And FeOOH; it can be said that the outdoor accelerated corrosion test has a better correlation with the atmospheric exposure test results.
Claims (3)
1. A coastal atmospheric corrosion accelerated test device is characterized in that the main body structure comprises a control cabinet, a test bed, a seawater tank, a seawater pump, a water filling port, a water discharging port, a seawater cup, a water pipe, a spray head, a fixed plate, a slide rail, a slide way, a lifting frame, a sample fixing frame, a light source frame and a light source; the switch board that mutual independence set up is connected with the test bench electricity, be provided with sea water tank and sea water pump on the side of test bench, the upper portion of sea water tank is provided with the water filling port, the lower part is provided with the outlet, sea water tank passes through sea water pump and water piping connection that sets up on the another side of test bench, the water pipe is connected with the atomising head, the atomising head is connected with the fixed plate, fixed plate and sliding rail connection, the both ends of slide rail are connected with the slide respectively, the both ends of slide are connected with the crane respectively, the crane sets up on the sample mount, the sample mount sets up on the top surface of test bench, still be provided with the light source frame on the test bench, be.
2. The coastal atmospheric corrosion accelerated test device of claim 1, wherein the control cabinet controls the seawater pump and the spray head to periodically absorb water and spray through automatic software, and controls the light source to enhance illumination; the water pipe is a flexible water pipe; the spray head can freely move and be positioned in a plane through the matching operation of the control cabinet, the slide rail and the slide way, and salt mist is uniformly sprayed on the surface of the sample; the spray head can be immersed into a seawater cup filled with seawater through the matching operation of a sliding rail, a slideway and a lifting frame so as to prevent the blockage of brine crystallization during standby; the light source comprises a mercury lamp and a xenon lamp, ultraviolet irradiation and sunlight irradiation are respectively enhanced, during testing, the mercury lamp or the xenon lamp is selected according to the illumination characteristics of a test region, the mercury lamp is selected for irradiation acceleration along the tropical sea, and the xenon lamp is selected for irradiation acceleration along the temperate sea.
3. The coastal atmospheric corrosion acceleration test device according to claim 1, characterized in that, during the test, the diluted water agent of artificial seawater, offshore natural seawater in the test area or the former two kinds of seawater is selected as a medium, and the diluted water agent is injected into a seawater tank to be filtered and sterilized at high temperature; the test period is 4-6 months, salt fog is sprayed according to multiplying power according to the atmospheric salinity and the illumination characteristics of the simulation test area, and the irradiation of a light source is strengthened: at a temperature of 0: 00-24: 00 within the daily test period, salt spray is sprayed for 1 time every 30min or every 1-6 hours, and the light source adopts the continuous irradiation mode, wherein the irradiation mode is that the irradiation is continuously carried out in the daytime, is closed at night or is divided into 3-6 stages, and the irradiation time is 1-7 hours in each stage.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024139170A1 (en) * | 2022-12-27 | 2024-07-04 | 中国电器科学研究院股份有限公司 | Natural environment accelerated corrosion test device and method for air conditioner |
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| CN1789973A (en) * | 2004-12-17 | 2006-06-21 | 中国科学院金属研究所 | Accelerated test method for atmospheric corrosion and special test device therefor |
| CN102175595A (en) * | 2011-03-21 | 2011-09-07 | 中国人民解放军装甲兵工程学院 | Test method for lossless monitoring and detection for material accelerated corrosion under simulated marine environment |
| CN103954550A (en) * | 2014-05-04 | 2014-07-30 | 中国兵器工业第五九研究所 | Marine atmosphere simulated accelerated testing method for coating |
| 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 |
| CN111398144A (en) * | 2020-03-31 | 2020-07-10 | 中国船舶重工集团公司第七二五研究所 | In-situ test detection device and method for simulating corrosion aging of multi-factor atmospheric environment material |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789973A (en) * | 2004-12-17 | 2006-06-21 | 中国科学院金属研究所 | Accelerated test method for atmospheric corrosion and special test device therefor |
| CN102175595A (en) * | 2011-03-21 | 2011-09-07 | 中国人民解放军装甲兵工程学院 | Test method for lossless monitoring and detection for material accelerated corrosion under simulated marine environment |
| CN103954550A (en) * | 2014-05-04 | 2014-07-30 | 中国兵器工业第五九研究所 | Marine atmosphere simulated accelerated testing method for coating |
| 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 |
| CN111398144A (en) * | 2020-03-31 | 2020-07-10 | 中国船舶重工集团公司第七二五研究所 | In-situ test detection device and method for simulating corrosion aging of multi-factor atmospheric environment material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024139170A1 (en) * | 2022-12-27 | 2024-07-04 | 中国电器科学研究院股份有限公司 | Natural environment accelerated corrosion test device and method for air conditioner |
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