JPH0249457B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention uses a single tank that can repeatedly apply conditions such as immersion, drying, temperature and humidity as a corrosion deterioration test,
The present invention also relates to a combined cycle testing machine capable of uniformly corroding a large number of test materials on each surface and on all test materials.

[Conventional technology]

In the conventional so-called immersion corrosion test, an air tank is arranged in the upper stage and an immersion liquid tank is arranged in the lower stage, and the sample is repeatedly immersed and dried by moving it up and down. The conventional example will be explained with reference to FIG. Move the sample frame up and down using 7. FIG. 1 shows a state in which a sample 4 attached to a sample frame is subjected to a dry test, but in the case of an immersion test, the sample frame is lowered into the immersion liquid tank 2 and the sample is immersed. Japanese Patent Application Laid-open No. 56-81437 is similar to the above-mentioned conventional example.

Further, the dry-wet cyclic corrosion testing apparatus disclosed in Utility Model Application Publication No. 54-77089 is capable of repeatedly immersing a sample in dry and wet conditions simply by continuing to introduce a corrosive liquid into the same test tank. A discharge port for the corrosive liquid is provided below the lower end position of the sample placed in the test tank, and an inverted U-shaped tube having a top above the upper end of the sample and an open port below the discharge port is connected to this discharge port. The test tank, the above-mentioned inverted U-shaped tube, and the corrosive liquid tank are used as a circulation system, and when the corrosive liquid is continuously sent to the test tank with a pump, the sample is immersed.
Next, the corrosive liquid is discharged using the siphon principle and the sample is dried, and this drying and wetting operation is subsequently repeated.

[Problem to be solved by the invention]

In the conventional technology of which the above-mentioned Japanese Patent Application Laid-Open No. 56-81437 is a representative example, the air tank and the immersion tank are stacked one above the other, and a mechanism for raising and lowering the sample is required, so a sturdy frame structure and a lifting device are required. , the equipment becomes extremely expensive, and not only does the installation location become a problem, but it also becomes very expensive.

Further, the apparatus of Utility Model Application No. 54-77089 differs from the above-mentioned conventional example in that a single tank is used to conduct the immersion test and the drying test. However, when the test tank containing the sample is continuously fed with corrosive liquid and becomes full, it is drained out in a siphon-like manner, and once the draining is finished, feeding begins. In other words,
The exposure conditions are completely different from those of normal corrosion tests, and it can be said that this is a method in which, for example, the switching operation between immersion and drying in a normal corrosion test is made extremely long and that operation is repeated. Specifically, the test sample is immersed for almost the entire time at the bottom of the test chamber, dried for almost the entire time at the top, and at intermediate depths the immersion time is inversely proportional to the depth and drying time. is proportional to the depth, and therefore there is no uniformity of test results as seen in conventional corrosion tests.

The present invention uses a single tank in which conditions such as immersion, drying, temperature and humidity can be repeatedly applied as a corrosion deterioration test,
Another object of the present invention is to provide a combined cycle testing machine that can uniformly perform corrosion on a large number of test samples on each surface.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an apparatus for performing complex cycle tests such as immersion, drying, temperature/humidity, low temperature, and spraying in the same test tank, in which a sample frame is placed at the bottom of the test tank. The side of the wall is isolated to form a temperature and humidity control room equipped with a temperature and humidity control device and a blower fan for blowing air into the test chamber, and a hakama-shaped double wall with an air outlet at the top of the isolation wall and an exhaust outlet at the bottom. A wall is provided, and the exhaust port is located between the lower part of the inner wall of the hakama-shaped double wall and the bottom surface, and further between the upper end of the partition plate rising from the bottom surface of the hakama-shaped double wall and the top of the hakama-shaped double wall. Between the horizontal plane〓
The structure is such that the immersion liquid can be delivered to and discharged from the test tank, and the temperature and humidity controlled air is sent from the top of the test tank. After reaching and contacting the sample at the bottom via a certain path, the sample is immediately circulated from the sample position through the exhaust port into the temperature and humidity control chamber without being recirculated within the test chamber, and the sample is immersed in the liquid. is a combined cycle testing machine with a structure in which the liquid is shut off by a partition plate.

Flow from the air outlet at the top of the isolation wall is ideal for descending, passing between the samples, and entering the exhaust outlet at the bottom of the isolation wall.

[Effect]

In the present invention, the hakama-shaped double-walled partition plate becomes the wall of the test tank when it is filled with a corrosive liquid. When discharging corrosive liquid and circulating hot air, etc., it enters through the exhaust port at the bottom of the inner wall, rises along the partition plate, and then enters the temperature and humidity control room. The temperature-controlled and humidity-controlled hot air is sent into the test chamber from the air outlet, and ideally flows around the sample forming a circulating flow as shown in FIG.

In addition, the deterioration results from various tests are uniform for each part of the sample surface, for all samples in the sample frame, and for the elapsed time of the test.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. FIGS. 2 and 3 are front sectional views showing the embodiment.
There is a sample frame 3 at the bottom of the test tank 16, an air exhaust port 18 is provided at the side of the test tank, and an inner wall 1 of a hakama-like double wall.
Between 7 and the bottom surface and the partition plate 1 rising from the bottom surface
9 and the top horizontal surface of the hakama-shaped double wall are connected, and the structure is connected to a blower fan 12 in a temperature and humidity control room 10. An immersion liquid tank 20 is located on the other side of the test tank.
There is an immersion liquid inlet and a liquid drain connected to the immersion liquid inlet and outlet.

During the hot air drying test, as shown in Figure 2, a blower 23 installed outside the test tank introduces outside air into the tank, while a blower fan 12 circulates the air inside the tank through the air outlet 14, and at the same time controls the temperature and humidity. The tank is heated by an indoor heater 13 to adjust the temperature inside the tank. At this time, a heater box 24 may be provided at the outlet of the blower 23 to send hot air into the tank.
Note that 27 is an exhaust port for the air inside the tank. Here, the feature of this device is that the air coming out of the air outlet 14 is sent to the exhaust port 18 located at the bottom of the test chamber 16.
In order to return to the temperature and humidity control room 10, the air is completely passed around the sample 4, and the drying effect is fully exhibited.

During the temperature and humidity test, air that has been humidified in the humidity tank 11 and heated by the heater 13 is sent to the test tank through the air outlet by the ventilation fan 12 and circulated to adjust the temperature and humidity. The humidification tank 11 is provided with a heater underwater.

During the low temperature test, the cooler 2 in the temperature and humidity control room 10
The air cooled in step 5 is sent into the test chamber through the air outlet 14, and the temperature is adjusted by circulating the air.

During the salt water spray test, salt water is sprayed by the spray tower 15 to accelerate the deterioration of the sample 4. At this time, the blower fan 12 is stopped, the functions in the temperature and humidity control chamber are stopped, and the temperature in the test chamber 16 is controlled by the heater 26.

FIG. 3 is an example showing a state in which an immersion corrosion test is performed by filling a test tank with an immersion liquid. A test tank 16 separated from the temperature and humidity control chamber by a partition plate 19 is filled with immersion liquid transferred from an immersion liquid tank 20 by a pump 21, and a sample frame 3 is fixed at the bottom of the test tank.
Immerse the sample 4 attached to the water. At this time, the functions of the blower fan 12 and the temperature and humidity control are stopped. Then,
To finish the immersion test and switch to another test,
After the immersion liquid in the test tank is returned to the immersion liquid tank 20 by the pump 22, the next test is conducted. 2nd, 3rd
The partition plate 19 shown in the figure is spaced an appropriate distance from the inner wall 17, and the exhaust port 1 is located at the bottom of the inner wall when the liquid is filled.
The immersion liquid passing through 8 is blocked here from going to the temperature and humidity control chamber, and the height corresponds to the amount of immersion liquid injected into the test tank during the immersion test. Further, instead of the partition plate, a duct having an appropriate cross-sectional area and height corresponding to the exhaust port may be used.

〔Effect of the invention〕

The testing machine of the present invention can perform all tests in a single test tank, and the testing machine as a whole is small, lightweight, and short in height, so there is no difficulty in selecting the installation location, it is easy to transport, and the equipment cost is low. Relatively cheap.

Furthermore, the effect to be emphasized of the present invention is that in hot air drying tests, temperature/humidity tests, low temperature tests, etc., hot air, etc. is introduced from the air outlet 14 and discharged from the exhaust port 18, resulting in a rational circulation flow within the test chamber. The exposed sample is characterized in that the entire surface of each sample is exposed to the same effect on all samples.

[Brief explanation of the drawing]

FIG. 1 is an example of a conventional immersion corrosion testing machine, and FIGS. 2 and 3 are front sectional views of a combined cycle testing machine of the present invention. 1...Air tank, 2...Immersion liquid tank, 3...Sample frame, 4...Sample, 5...Vertical main shaft, 6...Support arm, 7...Electric elevator device, 10...Temperature and humidity control Room, 11...Humidity tank, 12...Blower fan, 13...
Heater, 14...Blower port, 15...Spray tower, 16
...Test chamber, 17...Inner wall, 18...Exhaust port,
19... Partition plate, 20... Immersion liquid tank, 21,
22... pump, 23... blower, 24... heater box, 25... cooler, 26... heater,
27...Exhaust port.

Claims (1)

[Claims] 1 Immersion, drying, temperature and humidity, low temperature,
In equipment that performs complex cycle tests such as spraying, a sample frame is placed at the bottom of the test tank, the sides of the test tank are isolated, and a temperature control device and a fan for blowing air into the test tank are installed. A temperature and humidity controlled room is provided with a hakama-shaped double wall having an air outlet at the upper part of the isolation wall and an exhaust outlet at the lower part, and the exhaust outlet is located between the lower part of the inner wall of the hakama-shaped double wall and the bottom surface. In the middle of this hakama-shaped double wall, the upper end of the partition plate rising from the bottom and the space between the top horizontal surface of the hakama-shaped double wall are connected, and the structure is connected to the temperature and humidity control indoor ventilation fan, and the test tank A combined cycle testing machine characterized by being capable of supplying and discharging an immersion liquid to and from the tank.