JPS58162841A - Tester for deterioration - Google Patents

Abstract

PURPOSE:To carry out corrosion cycle tests of immersing and drying under exact testing conditions, by fixing a shielding plate and a sample suspending plate which form partition walls between an air tank and an immersion tank when samples are moved upward or downward to a vertical shaft which is freely movable vertically. CONSTITUTION:Samples 3 are suspended from a suspending plate 5 fixed to a vertical shaft 11 which is freely movable vertically. When the samples 3 are dried in an air tank 1, a shielding plate 8 isolates the tank 1 from an immersion tank 2, and when the samples 3 are held immersed in the tank 2, the plate 5 isolates both tanks. A fan 15 feeds the hot air heated with a heater 14 to the tank 1 and discharges the air through a discharge port 16. Since the tank 1 and the tank 2 are isolated in the cycles of the immersion in the etching soln. and the drying with the hot air as mentioned above, the rise of the soln. temp. is prevented, and the evaporation and concn. of the soln. are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the problem that surface treatments such as paint films, anti-rust oils, plating, etc. and metal materials deteriorate in the natural environment, and has been carried out as one of the accelerated durability tests. This article relates to a cyclic deterioration tester that repeats immersion and drying in a corrosive solution in an accelerated corrosion tester.

FIG. 1 is an explanatory diagram of a conventional method regarding a cycle test of corrosive liquid immersion and drying. The sample 3 immersed in the constant temperature immersion tank 2 is pulled up into the upper air tank 1 and exposed to constant temperature hot air pressure. The upper M4 is used to attach and detach the sample, but some test machines have a door on the side. The sample 3 is suspended M by the sample support arm 5. There is a vertical mechanism (crank mechanism) 6 at the lower end of the central vertical main shaft that supports the support arm, and the sample is raised and lowered by a motor drive.

When drying the sample, constant temperature hot air is sent to the air tank 1.

There is a hot air box 1 with a built-in heater 14, and outside air sent to it by a fan is sent into an air tank where it becomes hot air, and the temperature of the hot air is adjusted by controlling the heater with a temperature controller. The cycle test of the mechanism shown in Fig. 1 was performed as follows: ``The sample falls downward and is immersed in the immersion liquid.

The sample goes up to the upper air tank and is dried with hot air, and the sample is left in the same position at outside temperature, and the cycle is repeated. The drawback of this tester is that the top of the immersion tank is open, so if the liquid temperature is 50°C and the hot air drying temperature is 80°C, the heat will transfer to the liquid during hot air drying and the liquid temperature will rise to 50°C or more. There is a drawback that the at of the liquid may be concentrated and accurate test conditions cannot be maintained.

The testing machine shown in FIG. 2 was devised for the purpose of overcoming the drawbacks of the conventional method.

The difference from the structure of the conventional testing machine shown in FIG. 1 is that a fi 8 that can be opened and closed is provided at the boundary between the air tank 1 and the immersion tank 2. When the signal to immerse sample 3 in the liquid is given, first open/close ★8.

to separate the air tank and liquid tank. However, this testing machine has the following drawbacks. That is, (1) in order to open and close the lid 8, a large space must be seen and the air tank 1 must be raised higher than in the case of the tjs1 diagram. For this reason, the volume of the air tank increases, and the capacity of the hot air heater must be increased. (2) Therefore, the vertical movement distance of the sample increases, the dimensions of the vertical mechanism (crank mechanism) increase, and the capacity and torque of the drive motor must be increased. (3) Therefore, the pedestal of the testing machine must be made higher. In other words, to give reference values: The height of the test 4m (air tank + immersion tank) in Figure 1 is 42℃, and the overall simplicity is 9951, whereas in the case of the testing machine in Figure 2, the height of the test tank is ^^ The length is 66, and the total height is 1351.

The inventor has overcome the drawbacks of the conventional method explained in connection with FIG. 1.2 above, and has created an economically reasonable testing machine that maintains test conditions accurately.

In other words, the present invention provides a deterioration tester that performs a corrosion cycle test of immersion and drying by providing an air tank above the immersion tank. When the shaft is lowered and the sample is immersed, the sample suspension plate forms a partition between the air tank and the immersion tank.

When the vertical axis is raised and the sample is exposed to the air tank, the sample S hanging plate and the shielding plate are fixed to the vertical axis so that the closing plate forms a partition between the air tank and the immersion tank. This is a deterioration tester that is characterized by

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 3 shows a cycle testing machine for immersion, hot air drying, and room temperature air drying according to the present invention. There is an air tank 1 above the immersion tank 2. In the condition shown, sample 3 is exposed to an air bath to dry. The sample is suspended by a suspension plate 5. The m-closed fj8 that isolates the air tank 1 and the immersion tank 2 is a rectangular plate fixed via the SFI plate 5 to the vertical axis 11 of the mechanism for moving the sample up and down, and the center part is high and the peripheral part is low. [Reduce the resistance when rising into the liquid by pulling the liquid separator, and setting the valve 8. During the lowering QK, the valve opens upward to reduce the resistance. Further, the bell closing plate slides up and down through a hole provided in the center of the bell closing plate, which is penetrated by a tube 12 which is fixed upright to the bottom of the dipping tank. When the trailing plate rises and reaches its upper limit, the dipping tank is separated from the air tank by its periphery and a band-shaped packing 10 having the same shape as the periphery. When placing the test PF3 in an air tank, the heater 14 that can adjust the temperature is installed inside the chamber. A blower 15 sends outside air to the hot air box, and the generated hot air is sent to the air tank. The hot air is discharged from the hot air outlet 16 to the outside of the machine. When lowering and immersing the sample, use a rectangular #! When the hanging board descends and reaches the lower limit, its periphery and the band-shaped packing 9, which has the same shape as the rim, will cause
The air tank 1 and the immersion tank 2 are isolated. FIG. 4 shows the state when the sample is immersed.

As explained above, the air tank and the immersion tank are completely isolated by the sample hanging plate or the bell closing plate, and there is no air flow between them. Therefore, even in a cycle test where the liquid temperature is 50°C and the hot air temperature is 80°C, for example, the test can be performed under accurate test conditions without increasing the liquid temperature, preventing liquid evaporation and preventing liquid concentration. can.

Moreover, if the test machine structure is according to the present invention.

As explained with reference to FIG. 2, there is no disadvantage of having to make the test chamber high and the main body high, and the dimensions are the same as the example shown in FIG. 1. The testing machine according to the present invention eliminates all the drawbacks of conventional testing machines, and has the following features:
It is possible to conduct a cycle test of "lifting the product into the air and drying it with hot air, then leaving it in the same position at outside temperature" under accurate test conditions.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams of a conventional testing machine, and FIGS. 3 and 4 are explanatory diagrams of a testing machine according to the present invention. 1... Air tank, 2... Immersion tank, 3... Sample, 4-
Upper sound, 5... Sample support arm, sample hanging plate, 6... Vertical mechanism (crank mechanism), 7... Hot air box, 8...
・Opening/closing lid 1g 1 closing plate, 8...Valve, 9.10...Packing, 11...Vertical shaft, 12...Pipe, 13.14.
...Heater, 15...Blower, 16...Exhaust port. Figure 71 Figure 3

Claims (1)

[Claims] (1) In a deterioration testing machine that has an air tank above the immersion tank and tests the corrosion cycle of immersion and drying, there is a vertical axis in the center of the test tank that is movable up and down, and a vertical axis that is lowered. [When the sample is immersed, the sample suspension plate forms the partition wall of the air tank, and when the sample is exposed to the air tank by rising along the vertical axis, the suspension plate forms the partition wall of the air tank. A deterioration tester characterized in that a sample suspension plate and a value closing plate provided on a frame are fixed to a vertical axis of a skeleton. (2. The closed plate in claim 1 is rectangular with a high center and low periphery, and a valve is provided in the rectangular plate. Deterioration tester/