WO2010038343A1 - Dispositif pour essai de corrosion atmosphérique accélérée - Google Patents

Dispositif pour essai de corrosion atmosphérique accélérée Download PDF

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Publication number
WO2010038343A1
WO2010038343A1 PCT/JP2009/003576 JP2009003576W WO2010038343A1 WO 2010038343 A1 WO2010038343 A1 WO 2010038343A1 JP 2009003576 W JP2009003576 W JP 2009003576W WO 2010038343 A1 WO2010038343 A1 WO 2010038343A1
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salt water
salt
specimen
corrosion
corroded
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PCT/JP2009/003576
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English (en)
Japanese (ja)
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藤井和美
高橋克仁
大橋健也
宮坂徹
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株式会社日立製作所
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Publication of WO2010038343A1 publication Critical patent/WO2010038343A1/fr

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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
    • G01N17/002—Test chambers

Definitions

  • the present invention relates to a corrosion accelerating test apparatus capable of reproducing the corrosion form of a metal material used in the atmosphere, and more particularly to an apparatus for uniformly attaching a chemical substance that promotes corrosion to a test object.
  • the salt spray test method specified in JIS Z 2371 and the cycle corrosion test method specified in JIS K 5600-7-9 are known. Is used.
  • a conventional test apparatus employs a method in which salt water adjusted to a predetermined concentration is used as a chemical substance that promotes corrosion, and this salt water is sprayed in a mist form from a spray tower to adhere to a test object.
  • the spray amount of the salt water it is required as the accuracy of the test apparatus that there is little variation depending on the salt water collection position in the test tank.
  • a method for reducing variations in salt spray for example, a method for improving the spray tower by making the spray tower have a double structure is disclosed in Patent Document 1.
  • the above-described method of adhering salt particles by spraying salt water cannot reproduce corrosion due to adhesion of salt particles flying in the natural environment, and at the same time, the spray variation is still large, and the test object in the test apparatus is There is a problem that variation due to the installation position cannot be sufficiently resolved.
  • the method in which the salt particles are allowed to fly in a fixed space has a problem that even if the salt particles flying in the natural environment can be reproduced, the variation in the amount of salt particles deposited in the test tank cannot be controlled.
  • An object of the present invention is to provide a test apparatus capable of reproducing the salt particles flying in the natural environment and at the same time reducing the variation in the amount of adhered salt depending on the position of the test object in the test tank.
  • the gist of the present invention for achieving the above object is as follows.
  • the atmospheric corrosion promotion test apparatus is composed of a constant temperature and humidity chamber, a gantry for holding a test object, a mechanism for washing salt particles attached to the test object, and a mechanism for attaching salt water to the test object. This is achieved by controlling the diameter of the salt water droplets attached to the test object and the attachment position of the droplets, and uniformly attaching the salt water droplets attached to the test object without agglomeration.
  • the relationship between the target diameter (R) of the salt water droplets to be adhered and the diameter (r) of the salt water droplets actually adhered to the DUT is 0.9R ⁇ r ⁇ 1.1R
  • the relationship between the interval (L) between the droplets actually attached to the DUT and the target diameter (R) of the salt water droplet to be attached is L ⁇ 1.2R.
  • the object is achieved by adhering salt water droplets satisfying such a relationship to the DUT at regular intervals.
  • salt water droplets that can simulate the natural environment can be attached, and salt water droplets can be uniformly attached in the test tank. Variations in the amount of salt attached due to the location of the test specimen are reduced, and the test accuracy can be improved.
  • Example 1 The block diagram of the atmospheric corrosion acceleration
  • Example 1 the figure which shows the state from which the discharged salt water became a droplet and adhered to the plate-shaped test material.
  • Example 1 the figure which shows the relationship between the salt content and the diameter of a salt water droplet, or the salt concentration in a droplet.
  • Example 3 the figure which shows the state which the discharged salt water became a droplet and adhered to the plate-shaped test material.
  • Example 3 it is a figure which shows the relationship between the amount of salt adhesion, the diameter of a salt water droplet, or the salt concentration in a droplet.
  • FIG. 1 shows the configuration of the atmospheric corrosion acceleration test apparatus of this example.
  • the atmospheric corrosion promotion test apparatus of the present embodiment is a temperature / humidity setting function in which the temperature and humidity can be controlled independently, and a plurality of combination conditions of the temperature and humidity in the constant temperature and humidity chamber can be continuously changed and maintained.
  • Temperature control and humidity chamber 1 which has a controllability, salt water discharge mechanism 2 for discharging (spraying) salt water to adhere salt to the specimen to be corroded, and washing and removing salt attached to the specimen to be corroded
  • a salinity cleaning / drying chamber 3 provided with a cleaning mechanism, and a corrosion test specimen mount 4 for holding the corrosion test specimen.
  • a plate-like test material 5 is installed on a corrosion test specimen base 4 as a corrosion test specimen.
  • the test procedure in this atmospheric corrosion acceleration test apparatus is shown.
  • the plate-shaped test material 5 is washed and dried, it is arranged on the entire surface of the corrosion test specimen mount 4.
  • the salt water discharge mechanism 2 changes to the plate-like test material 5.
  • the plate-like test material 5 is inserted into the constant temperature and humidity chamber 1 under program control, and a corrosion test is started.
  • the plate-like test material 5 to which salt water is attached is subjected to a corrosion test in an environment of a temperature and humidity cycle in which a predetermined temperature and humidity are combined in the constant temperature and humidity chamber 1.
  • the plate-shaped test material 5 is first dried at 60 ° C. for 3 hours in a dry environment with a relative humidity of 35% RH and then at 40 ° C. for a relative humidity of 95%.
  • the cycle of holding in an RH humid environment for 3 hours was repeated 12 times.
  • each transition time from the dry environment to the wet environment or from the wet environment to the dry environment was set to 1 hour, and a series of cycles was set to 8 hours.
  • the plate-like test material 5 installed on the corrosion test stand 4 is taken out through the salt cleaning / drying chamber 3.
  • a water washing nozzle and a hot air drying nozzle (not shown) are installed in the salt washing / drying chamber 3.
  • a predetermined amount of clean water is discharged from the water washing nozzle onto the plate-shaped test material 5, and the salt attached to the plate-shaped test material 5 is washed away.
  • warm air is blown from the warm air drying nozzle, and the plate-shaped test material 5 is dried.
  • the temperature of the washing water was set to 30 ° C.
  • the temperature of the hot air was set to 50 ° C.
  • the corrosion test was continued by repeating this series of salt water adhesion process, temperature / humidity cycle process, and washing and drying process.
  • the drying and wetting in the temperature and humidity cycle process was repeated for 4 weeks or 8 weeks, and in that, the salt water adhesion process and the washing and drying process were performed twice a week.
  • FIG. 2 is a view showing a salt water discharge mechanism in the atmospheric corrosion promotion test apparatus of the present embodiment.
  • a salt water port 6 for supplying salt water
  • a drain port 7 for discharging salt water in the salt water discharge mechanism
  • a water intake port 8 for supplying clean water for cleaning the salt water discharge mechanism as supply and exhaust ports.
  • the salt water in the salt water discharge mechanism is discharged toward the plate-shaped test material from the salt water discharge port 9 by driving a piston 10 installed immediately above the salt water discharge port 9.
  • FIG. 3 shows a state in which the discharged salt water becomes droplets 11 and adheres to the plate-like test material 5.
  • the droplet diameter (r) actually attached to the plate-shaped test material 5 could be controlled within 1.1 times the droplet diameter (R) set by the control of the discharge mechanism. Furthermore, from the relationship between the driving conditions of the piston and the moving speed of the corroded test specimen mount, in order to reproduce the adhesion of salt in a state close to the actual environment without agglomerating the discharged droplets, the interval between the droplets ( It was found that L) is required to be 1.2 times or more the droplet diameter (R) set by the control of the discharge mechanism.
  • Repeatability is determined by whether a certain amount of salt water adheres within a predetermined area, or a certain amount of salt water adheres to an arbitrary unit area of the predetermined area, or more than once in each application. It is judged whether a certain amount of salt water adheres.
  • the condition for depositing salt in a state close to the actual environment is that the salt water droplet diameter (r) adhering to the surface of the specimen to be corroded and the droplet diameter (R) controlled by the salt water discharge mechanism.
  • the relationship is 0.9R ⁇ r ⁇ 1.1R, and the relationship between the interval (L) between the droplets adhering to the surface of the specimen to be corroded and the diameter (R) of the droplet controlled by the salt water discharge mechanism is L ⁇ 1.2R, that is, salt water is adhered to the surface of the corrosion test specimen at regular intervals.
  • FIG. 4 is a diagram in which the relationship between the salt adhesion amount per 1 m 2 of the plate-shaped test material, the diameter of the salt water droplets, and the salt concentration in the droplets in the salt water adhesion form shown in FIG. 3 is examined.
  • NaCl was used as the salinity
  • the salt concentration was examined by changing the salinity concentration from 0.0033 mass% to 35 mass%.
  • the salt adhesion amount can be controlled to 0.1 to 10000 mg / m 2 by controlling the diameter of the salt water droplets adhering to the plate-shaped test material to 10 to 300 ⁇ m and controlling the NaCl concentration in the salt water. It was confirmed that the adhesion state of salt flying in the actual environment can be reproduced with a wide range of adhesion amounts.
  • the variation in the amount of adhering salt in the surface of the corrosion test specimen mount was examined. Forty test materials of 100 mm ⁇ 100 mm were arranged on a corrosion test specimen frame having an area of 600 mm ⁇ 900 mm. Here, titanium was used as a test material. In the same manner as described above, the salt water discharge mechanism was controlled so that the salt adhesion amount of the plate-shaped test material was 1 g / m 2, and the salt content was adhered to the test material. After drying in a constant temperature and humidity chamber, the test material was taken out as it was, and the mass of salt adhering to the surface of the test material was measured with an electronic balance.
  • the mass of salt adhering to one test material was 0.0110 g (1.1 g / m 2 ) at the maximum and 0.00092 g (0.92 g / m 2 ) at the minimum. That is, the mass (m) per 1 cm 2 of the salt actually attached to the surface of the test specimen and the target mass (M) per 1 cm 2 of the salt controlled by the salt water discharge mechanism to be attached to the test specimen surface. In this relationship, 0.9M ⁇ m ⁇ 1.1M, the salt content uniformly adhered to the surface of the specimen.
  • an atmospheric corrosion promotion test apparatus that controls the diameter of the salt water droplets discharged from the salt water discharge mechanism and adhered to the surface of the test material, the interval between the droplets, and the salt concentration in the discharged salt water.
  • FIG. 5 is a configuration diagram of an atmospheric corrosion promotion test apparatus according to Example 2 of the present invention.
  • the atmospheric corrosion promotion test apparatus of the present embodiment is a temperature / humidity setting function in which the temperature and humidity can be controlled independently, and a plurality of combination conditions of the temperature and humidity in the constant temperature and humidity chamber can be continuously changed and maintained.
  • Temperature control and humidity chamber 1 that can be programmed and controlled, salt water discharge mechanism 2 for discharging salt water to adhere salt to the specimen to be corroded, salt water discharge mechanism cleaning and storage room for cleaning and storing the salt water discharge mechanism 12 and a corrosion test specimen mount 4 for holding the corrosion test specimen.
  • a plate-like test material 5 is installed on a corrosion test specimen base 4 as a corrosion test specimen.
  • the test procedure in this atmospheric corrosion acceleration test apparatus is shown.
  • the plate-shaped test material 5 is washed and dried, it is arranged on the entire surface of the corrosion-resistant test specimen mount 4 installed in the constant temperature and humidity chamber 1 that can be controlled by the program.
  • the salt water discharge mechanism 2 moves while discharging salt water over the plate-shaped test material 5 installed on the corrosion test specimen mount 4, and a predetermined amount of salt water is applied to the surface of the plate-shaped test material 5.
  • the plate-like test material 5 to which salt water is attached is subjected to a corrosion test in an environment of a temperature and humidity cycle in which a predetermined temperature and humidity are combined in the constant temperature and humidity chamber 1.
  • the salt water discharge mechanism 2 is provided with a water washing nozzle and a blower nozzle (not shown) for washing the plate-shaped test material 5, and the salt content washing after the plate-shaped test material 5 is exposed for a predetermined period of time.
  • the salt water discharge mechanism 2 again moves on the upper part of the plate-shaped test material 5 installed on the corrosion-resistant test body mount 4.
  • a predetermined amount of clean water is discharged from the attached water washing nozzle to the plate-like test material 5, and the salt attached to the plate-like test material 5 is washed away. It is.
  • the constant temperature and humidity chamber 1 is operated at a constant temperature of 40 ° C. so as not to humidify, and the plate-like test material 5 is dried. After the plate-like test material 5 is dried, the salt water discharge mechanism 2 is moved again to deposit salt. The corrosion test was continued by repeating this series of salt water adhesion process, temperature / humidity cycle process, and washing and drying process.
  • the salt water discharge mechanism 2 is fixed with salt deposited from the salt water while being stored in the salt water discharge mechanism cleaning / storage chamber 12, and the variation in the salt adhesion accuracy in the subsequent salt adhesion step increases. there is a possibility. Therefore, while the salt water discharge mechanism 2 is stored, clean water is supplied from the water supply port provided in the salt water discharge mechanism 2 and discharged from the salt water discharge port, thereby remaining in the salt water discharge mechanism 2. The salt water is washed. As a result, the corrosion test could be continued while maintaining the salt adhesion accuracy shown in Example 1.
  • the atmospheric corrosion promotion test apparatus of this example it is possible to reproduce the salinity state flying in the actual environment, and at the same time, it is possible to reduce variations in the amount of salt adhesion due to the installation position of the test material, The repeatability of the atmospheric corrosion acceleration test can be improved.
  • FIG. 6 is a configuration diagram of an atmospheric corrosion promotion test apparatus according to Example 3 of the present invention.
  • the atmospheric corrosion promotion test apparatus of the present embodiment is a temperature / humidity setting function in which the temperature and humidity can be controlled independently, and a plurality of combination conditions of the temperature and humidity in the constant temperature and humidity chamber can be continuously changed and maintained.
  • Temperature control and humidity chamber 1 which has a controllability, a salt water discharge mechanism 2 for discharging salt water to adhere salt to the material to be corroded, a salt water discharge mechanism cleaning / storage room for cleaning and storing the salt water discharge mechanism 12, a movable corrosion test object base 13 for holding the corrosion test material, and a water washing tank 14 for cleaning the corrosion test material.
  • a plate-like test material 5 is installed on a movable corrosion-resistant test body mount 13 as a corrosion-resistant test material.
  • the test procedure in this atmospheric corrosion acceleration test apparatus is shown.
  • the plate-shaped test material 5 is washed and dried, it is arranged on the entire surface of the movable corrosion-resistant test specimen mount 13 installed in the constant temperature and humidity chamber 1 that can be controlled by the program.
  • the salt water discharge mechanism 2 moves while discharging salt water on the upper part of the plate-like test material 5 installed on the movable corrosion-resistant test object base 13, and a predetermined amount is applied to the surface of the plate-like test material 5.
  • the plate-like test material 5 to which salt water is attached is subjected to a corrosion test in an environment of a temperature and humidity cycle in which a predetermined temperature and humidity are combined in the constant temperature and humidity chamber 1.
  • the corrosion-resistant test material (plate-like test material 5) is immersed in the water washing tank 14 together with the movable corrosion-resistant test object mount 13.
  • the salt adhering to the plate-shaped test material 5 is washed away by the clean water circulating in the washing tank 14.
  • the movable corrosion-resistant test object base 13 is pulled out of the water washing tank 14, and the constant temperature and humidity chamber 1 is operated at a constant temperature of 50 ° C. to dry the plate-like test material 5.
  • the salt water discharge mechanism 2 was moved again to deposit salt, and the corrosion test was continued.
  • FIG. 7 is a view showing a salt water discharge mechanism in the atmospheric corrosion promotion test apparatus of the present embodiment.
  • a salt water port 6 for supplying salt water
  • a drain port 7 for discharging salt water in the salt water discharge mechanism
  • a water intake port 8 for supplying clean water for cleaning the salt water discharge mechanism as supply and exhaust ports.
  • the salt water in the salt water discharge mechanism is discharged toward the plate-shaped test material from the salt water discharge port 9 by driving a piston 10 installed immediately above the salt water discharge port 9.
  • the discharge ports are arranged in two rows in a staggered pattern (staggered arrangement).
  • FIG. 8 shows a state in which the salt water discharged from the discharge port array becomes droplets 11 and adheres to the plate-shaped test material 5. Compared with the adhesion state of Example 1 shown in FIG. 3, it can be seen that the area ratio of the droplets 11 to the plate-like test material 5 is increased.
  • the diameter of the salt water discharge port and the driving condition of the piston were examined in detail, and as a result of attempting to control the droplet diameter from the salt water discharge mechanism to 50 ⁇ m, the diameter of the salt water adhering to the plate-shaped test material 5 was controlled to 50 ⁇ 5 ⁇ m. That is, the droplet diameter (r) actually attached to the plate-shaped test material 5 could be controlled within 1.1 times the droplet diameter (R) set by the control of the discharge mechanism.
  • the interval between the droplets (L ) Is required to be 1.2 times or more the droplet diameter (R) set by controlling the discharge mechanism.
  • the condition for depositing salt in a state close to the actual environment is that the salt water droplet diameter (r) adhering to the surface of the corrosion test material and the droplet diameter (R) controlled by the salt water discharge mechanism.
  • the relationship is 0.9R ⁇ r ⁇ 1.1R, and the relationship between the interval (L) of the droplets adhering to the surface of the corrosion test material and the diameter (R) of the droplets controlled by the salt water discharge mechanism is L ⁇ 1.2R, and salt water is attached to the surface of the corrosion test material at regular intervals.
  • FIG. 9 is a diagram in which the relationship between the salt adhesion amount per 1 m 2 of the plate-shaped test material, the diameter of the salt water droplet, and the salt concentration in the droplet in the salt water adhesion form shown in FIG. 8 is examined.
  • NaCl was used as the salinity
  • the salt concentration was examined by changing the salinity concentration from 0.0033 mass% to 35 mass%.
  • the discharge port array of the present embodiment has a wider control range of the amount of salt adhering than the discharge port array of Example 1 (FIG. 2) in which the discharge ports are arranged in a row, and the adhesion of salt that flies in the actual environment. It was confirmed that the amount could be reproduced in a wider range.
  • an atmospheric corrosion promotion test apparatus that controls the diameter of the salt water droplets discharged from the salt water discharge mechanism and adhered to the surface of the test material, the interval between the droplets, and the salt concentration in the discharged salt water.
  • FIG. 10 is a block diagram of an atmospheric corrosion promotion test apparatus according to Example 4 of the present invention.
  • the atmospheric corrosion promotion test apparatus of the present embodiment can control temperature and humidity independently, and has a function of setting a plurality of conditions of temperature and humidity in a constant temperature and humidity chamber and can be controlled by a program.
  • It comprises a movable corrosion-resistant specimen mount 13 for washing and a water washing tank 14 for washing the corrosion-resistant specimen.
  • a plate-like test material 5 is installed on a movable corrosion-resistant test specimen mount 13 as a corrosion-resistant specimen.
  • the test procedure in this atmospheric corrosion acceleration test apparatus is shown.
  • the plate-shaped test material 5 is washed and dried, it is arranged on the entire surface of the movable corrosion-resistant test object mount 13.
  • the plate-shaped test material 5 is inserted into the temperature-and-humidity chamber 1 that can be controlled by the program and the corrosion test is started, the plate-shaped test material 5 installed on the movable corrosion-resistant test object base 13 is washed with the salt water discharge mechanism.
  • salt water is discharged from the salt water discharge mechanism 2 toward the plate test material 5, so that the surface of the plate test material 5 is discharged. A predetermined amount of salt water adheres.
  • the plate-like test material 5 to which salt water is attached is subjected to a corrosion test in an environment of a temperature and humidity cycle in which a predetermined temperature and humidity are combined in the constant temperature and humidity chamber 1.
  • the plate-like test material 5 was exposed to a combined environment of drying and wetting in a temperature and humidity cycle for a predetermined period.
  • the corroded test body (plate-shaped test material 5) is immersed in the water washing tank 14 together with the movable corrosion-tested specimen mount 13.
  • the salt adhering to the plate-shaped test material 5 is washed away by the clean water circulating in the washing tank 14.
  • the movable corrosion test specimen base 13 is pulled out from the water washing tank 14 and taken out through the salt water discharge mechanism washing / storage chamber 12.
  • a hot air drying nozzle (not shown) is installed in the salt water discharge mechanism cleaning / storage chamber 12, and the plate-like test material 5 is dried by blowing hot air from the hot air drying nozzle.
  • the corrosion test was continued by repeating this series of salt water adhesion process, temperature / humidity cycle process, and washing and drying process.
  • an atmospheric corrosion promotion test apparatus for controlling the diameter of the salt water droplets discharged from the salt water discharge mechanism and adhering to the surface of the test body, the interval between the droplets, and the salt concentration in the discharged salt water.

Abstract

Les dispositifs existants pour essai de corrosion atmosphérique accélérée posent des problèmes en ce que la corrosion provoquée par l'adhésion de particules de sel volant dans le milieu naturel ne peut être reproduite par ceux-ci et la vitesse de pulvérisation varie toujours de façon importante de telle sorte que la variation de la quantité de particules de sel ayant adhérées dans un réservoir d’essai ne peut pas être régulée. L'invention porte sur un dispositif pour essai de corrosion atmosphérique accélérée dans lequel les diamètres et les sites d'adhésion de gouttes de solution saline devant être amenées à adhérer à un matériau d’essai peuvent être régulés et ainsi les gouttes de solution de sel peuvent adhérer de façon uniforme au matériau d’essai sans s'agréger ensemble. Plus spécifiquement, l'invention porte sur un dispositif pour essai de corrosion atmosphérique accélérée comprenant un réservoir à température et humidité constantes, une table de matériau d’essai sur laquelle un matériau d’essai devant être soumis à l’essai de corrosion est placé, un élément de lavage à l'eau et un élément de pulvérisation de solution saline à partir duquel une solution saline est pulvérisée sur le matériau d’essai devant être corrodé, la relation entre le diamètre des gouttes de solution saline adhérant à la surface du matériau d’essai devant être corrodé (r) et le diamètre des gouttes de solution ayant été régulés par l'élément de pulvérisation de solution saline (R) satisfaisant 0,9 R ≤ r ≤ 1,1 R ; la relation entre l'intervalle de gouttes adhérant à la surface du matériau d’essai devant être corrodé (L) et le diamètre de gouttes de solution ayant été commandées par l'élément de pulvérisation de solution saline (R) satisfaisant L ≥ 1,2 R ; et une quantité prédéfinie de la solution saline par unité de surface est amenée à adhérer sur la surface du matériau d’essai devant être corrodé.
PCT/JP2009/003576 2008-09-30 2009-07-29 Dispositif pour essai de corrosion atmosphérique accélérée WO2010038343A1 (fr)

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CN103115864A (zh) * 2013-01-22 2013-05-22 北京科技大学 一种室内综合模拟/快速评价大气环境腐蚀的装置
GB2498059A (en) * 2011-12-27 2013-07-03 Hitachi Ltd Atmospheric corrosion test procedure and apparatus
CN103411876A (zh) * 2013-08-16 2013-11-27 山东方圆建筑工程检测中心 一种耐碱型玻璃纤维网格布耐碱试验装置
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CN106124389A (zh) * 2016-06-28 2016-11-16 芜湖鸣人热能设备有限公司 锅炉用管板的耐腐蚀性能测试箱
CN112697687A (zh) * 2020-12-10 2021-04-23 广东艾斯瑞仪器科技有限公司 测试试验箱

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GB2498059A (en) * 2011-12-27 2013-07-03 Hitachi Ltd Atmospheric corrosion test procedure and apparatus
GB2498059B (en) * 2011-12-27 2014-08-20 Hitachi Ltd Atmospheric corrosion test procedure
CN103115864A (zh) * 2013-01-22 2013-05-22 北京科技大学 一种室内综合模拟/快速评价大气环境腐蚀的装置
CN103411876A (zh) * 2013-08-16 2013-11-27 山东方圆建筑工程检测中心 一种耐碱型玻璃纤维网格布耐碱试验装置
CN104237115A (zh) * 2014-10-11 2014-12-24 无锡鑫宏业特塑线缆有限公司 恒温油槽装置
CN104535483B (zh) * 2014-12-11 2016-11-02 练志伟 一种可恒温恒湿的盐雾测试装置
CN106124389A (zh) * 2016-06-28 2016-11-16 芜湖鸣人热能设备有限公司 锅炉用管板的耐腐蚀性能测试箱
CN112697687A (zh) * 2020-12-10 2021-04-23 广东艾斯瑞仪器科技有限公司 测试试验箱
CN112697687B (zh) * 2020-12-10 2022-11-22 广东艾斯瑞仪器科技有限公司 测试试验箱

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