Corrosion Testing Machine

Abstract

To prevent solution from adhering to a wick, to enable accurate humidity measurement over a long period of time, and to reduce the frequency of wick replacement.SOLUTION: In a corrosion testing machine that performs corrosion testing by solution spraying (salt water spray test, CASS test, composite cycle corrosion test, etc.), a cover 6 is installed above a temperature sensor 3 for wet bulb temperature detection and below a temperature sensor 2 for dry bulb temperature detection in a corrosion test chamber to prevent the solution from adhering to a wick attached to the temperature sensors. Since the sprayed solution descends toward the wick 5 from above, the installation of the cover 6 above the wick 5 can prevent the solution from falling on the wick 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to a technique for preventing inaccurate humidity measurements by a humidity sensor caused by solution adhering to a wick in a corrosion testing machine that performs corrosion testing by spraying a solution. [Background technology]

[0002] In a corrosion tester that uses a solution spray, accurate measurement of humidity is an important factor in ensuring the reliability and reproducibility of test results. To measure humidity, a wick is attached to a temperature sensor for detecting the wet bulb temperature, the bottom end of the wick is immersed in water stored in a wick pan, and the temperature of the water in the wick pan is measured by the temperature sensor for detecting the wet bulb temperature. The humidity is then calculated based on this data. However, it is inevitable that the solution will adhere to the wick, and if the solution or dirt adheres, the amount of water that can soak into the wick will decrease, hindering accurate humidity measurement.

[0003] Therefore, the wick is washed with water to wash away substances contained in the solution (such as salt, cupric chloride, and acetic acid) and dirt. The applicant proposed a device that includes a cleaning water discharge nozzle that supplies cleaning water to a wick that is placed over a temperature sensor for detecting the wet-bulb temperature, and that discharges cleaning water during periods when it is not necessary to detect the wet-bulb temperature, thereby washing away any solution that has adhered to the wick (Patent Publication No. 2015-152468). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-152468 A Summary of the Invention [Problem to be solved by the invention]

[0005] Even when washing the wick with water to wash away the substances and dirt contained in the solution that have adhered to the wick, it is not possible to completely wash away the substances and dirt contained in the solution, and the wick must be replaced from time to time. However, in the field where corrosion tests are performed, replacing the wick is a cumbersome task, and it is sometimes not replaced at the appropriate time, which can lead to inaccurate humidity measurements and a decrease in the reliability of the test results.

[0006] This invention is a corrosion testing machine that performs corrosion tests by spraying a solution (salt spray test, CASS test, combined cycle corrosion test, etc.), A temperature sensor for detecting the wet-bulb temperature is installed, and a temperature sensor for detecting the dry-bulb temperature is installed above it. a wick attached to the temperature sensor for detecting the wet-bulb temperature, the wick being disposed above the temperature sensor for detecting the wet-bulb temperature and below the temperature sensor for detecting the dry-bulb temperature, for preventing the solution from adhering to the wick attached to the temperature sensor for detecting the wet-bulb temperature; Fixed cover Installed The fixed cover always prevents the solution from adhering to the wick, and always allows measurement by the temperature sensor for detecting the wet-bulb temperature. It is a corrosion testing machine. DISCLOSURE OF THE INVENTION [Means for solving the problem]

[0007] This invention relates to a corrosion testing machine (salt spray test, CASS test, combined cycle corrosion test, etc.) that performs corrosion tests by spraying a solution. A cover is installed above the temperature sensor for detecting the wet-bulb temperature and below the temperature sensor for detecting the dry-bulb temperature in the corrosion test chamber to prevent the solution from adhering to the wick attached to the temperature sensor.

[0008] Since the sprayed solution descends from above toward the wick, placing a cover above the wick can prevent the solution from falling onto the wick. The cover covers the wet-bulb temperature sensor and directs the solution away from the wick. While the cover may be a horizontally placed flat plate, it is preferable to use a rod-shaped cover with a top above the wet-bulb temperature sensor and downwardly sloping surfaces on both sides of the top (claim 2). By providing a slope, the descending solution can be moved sideways, preventing the solution from adhering to the sides of the wick. The appropriate angle of the slope is considered to be within 40 degrees. If the cover has side walls surrounding the wick, it can be more effective in preventing the solution from splashing from the sides of the wick (Claim 3). In this case, the side walls may cover all four sides of the wick, or may be provided only on the sides corresponding to the front and back surfaces of the wick (two sides), or may be provided on three sides.

[0009] In carrying out the present invention, it is optional to provide a cleaning water discharge nozzle for supplying cleaning water to the wick. [Effects of the Invention]

[0010] According to this invention, a cover is installed above the temperature sensor for detecting the wet-bulb temperature, which prevents the sprayed solution descending from above from adhering to the wick attached to the temperature sensor for detecting the wet-bulb temperature. This prevents substances contained in the solution from adhering to the wick, enabling accurate humidity measurement over a long period of time and reducing the frequency of wick replacement. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a front cross-sectional view showing an outline of a first embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. 10 is a front cross-sectional view showing an outline of a second embodiment of the present invention. [Figure 4] FIG. [Figure 5] This is a cross-sectional view taken along line AA in FIG. [Figure 6] 5 is a cross-sectional view taken along the line AA in FIG. 4 in an example in which side walls are provided on three sides. [Figure 7] 5 is a cross-sectional view taken along the line AA in FIG. 4 in an example in which side walls are provided on two sides. [Example]

[0012] An embodiment of the present invention will now be described. Example 1

[0013] Figures 1 and 2 show the temperature sensor part in the corrosion test chamber of a corrosion tester that performs corrosion tests by spraying a solution. Inside the corrosion test chamber 1, from top to bottom, there are installed a temperature sensor for detecting dry-bulb temperature (hereinafter referred to as the "dry-bulb sensor") 2, a temperature sensor for detecting wet-bulb temperature (hereinafter referred to as the "wet-bulb sensor") 3, and a wick pan 4. The wet-bulb sensor 3 is equipped with a wick 5, the lower end of which is immersed in water stored in the wick pan 4. With this configuration, the dry-bulb sensor 2 measures the ambient temperature inside the test chamber, and the wet-bulb sensor 3 measures the temperature of the water in the wick pan 4 sucked up by the wick 5, and the humidity is detected based on this.

[0014] A cover 6 is installed above the wet-bulb sensor 3. This cover 6 has a top above the rod-shaped wet-bulb temperature sensor 3 and has slopes on both sides of the top that slope downward at about 30 degrees, so that it covers the wet-bulb temperature sensor 3 when viewed from the front. Its size is slightly larger than that of the wick pan 4 in both the front and side views. In the figure, reference numeral 7 denotes a wick cleaning nozzle.

[0015] According to this embodiment, the descending solution is blocked by the cover 6 and does not strike the wick 5 from above. In addition, because the cover 6 has an inclined surface, the descending solution flows sideways along the inclined surface, which also prevents the solution from adhering to the side surface of the wick 5. Example 2

[0016] 3 and 4 also show a temperature sensor portion in a corrosion test chamber 1 of a corrosion tester that performs a corrosion test by spraying a solution, and the only difference from Example 1 is the state of the cover 6. In this embodiment, the cover 6 has a top plate 6a, which is a rectangular flat plate in plan view, and side walls 6b provided on all four sides of the top plate 6a. The top plate 6a is equal to or slightly larger than the wick pan 4 in plan view, and the bottom ends of the side walls 6b are located close to the top end of the wick pan 4. It should be noted that no wick cleaning nozzle is provided.

[0017] According to this embodiment, the wick 5 is covered from above and all around with the cover 6, so that the solution does not flow near the wick, and adhesion of the solution to the wick 5 is prevented.

[0018] 6 and 7 show other embodiments of side walls, with FIG. 6 showing side walls provided on only two sides facing the width faces of the wick 5, and FIG. 7 showing side walls provided on only three sides. The shape of the top plate is not limited to a square in plan view, but may be a circle, ellipse, polygon, or the like in plan view. [Industrial Applicability]

[0019] The present invention enables accurate humidity measurement over a long period of time in a corrosion tester, reduces the frequency of wick replacement, and has industrial applicability. [Explanation of symbols]

[0020] 1. Corrosion Test Chamber 2 Temperature sensor for detecting dry-bulb temperature 3 Temperature sensor for detecting wet bulb temperature 4 Wick Pan 5 Wick 6 Cover 6a Top plate 6b side wall 7 Wick cleaning nozzle

Claims

1. A corrosion testing machine that performs corrosion tests by spraying a solution, in which a temperature sensor for detecting wet-bulb temperature is installed in a corrosion test chamber, and a temperature sensor for detecting dry-bulb temperature is installed above it, and a fixed cover is installed above the temperature sensor for detecting wet-bulb temperature and below the temperature sensor for detecting dry-bulb temperature to prevent solution from adhering to a wick attached to the temperature sensor for detecting wet-bulb temperature, so that the fixed cover always prevents solution from adhering to the wick while allowing measurement by the temperature sensor for detecting wet-bulb temperature at all times.

2. 2. The corrosion testing machine according to claim 1, wherein the cover has a top portion above the rod-shaped temperature sensor for detecting the wet-bulb temperature and has downwardly sloping inclined surfaces on both sides of the top portion.

3. 3. The corrosion testing machine according to claim 1, wherein the cover has a peripheral wall surrounding the wick.

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