Metal anti-acidification testing device

Abstract

The utility model discloses a metal anti-acidification testing device which comprises a sample tank for containing metal to be tested and a heating device for adjusting the internal testing temperature of the sample tank, a sealing cover for sealing the sample tank is arranged on the sample tank, a pressure adjusting assembly for adjusting the pressure in the sample tank is arranged on the sealing cover, and a rotating assembly is arranged at the bottom of the sample tank. The device truly simulates and tests the anti-acidification test of the metal material under different temperatures and pressures when the cooling liquid is in an actual use state; the device is simple in structure and convenient to operate, the sample tank is obliquely arranged on the inclined section of the heater by means of the soft connecting pipe of the gas cylinder, the stable gas pressure in the tank is ensured, and the temperature rise rate in the tank is increased, so that the simulation environment is closer to the use state; the air tightness test assembly ensures the stability of the pressure in the sample tank, and further ensures the authenticity of the simulation environment; the rotating assembly ensures that each to-be-tested metal test piece is completely soaked in the cooling liquid in the testing process, and the accuracy of the testing result is ensured.

Description

Technical Field

[0001] The utility model relates to a coolant performance testing device, in particular to a metal acidification resistance testing device. Background Art

[0002] Coolant in the automotive industry primarily protects the proper functioning of engines, providing antifreeze, corrosion, rust, and boiling protection. Aluminum alloys are widely used in automotive engine cooling systems. Coolant circulates within the engine radiator, where its antioxidant and corrosion resistance can be affected by high temperatures, high pressures, or low temperatures. Especially in harsh engine operating conditions, such as high temperatures, hot spots, entrained air, or small cooling systems, coolant can easily form bubbles, causing cavitation or impact corrosion with the radiator. This can compromise the coolant's cooling effectiveness and permanently damage the vehicle's cooling system, severely impacting its service life. Therefore, antioxidant and corrosion resistance are crucial evaluation criteria in coolant development. Currently, testing the acidification resistance of coolant on metal materials typically involves measuring the weight loss of samples before and after immersion at a specific temperature. Immersion tests, with their fixed temperature, pressure, and ambient conditions, cannot be adjusted. This fails to simulate the actual conditions, particularly harsh environments, under which automotive coolant will react to the acidification resistance of various metal materials in the vehicle's cooling system. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a metal acid resistance test device in order to simulate the test of the acid resistance of metal materials under actual use conditions of the coolant.

[0004] Technical solution: The metal acid resistance testing device described in the utility model includes a sample can containing the metal to be tested and a heating device for adjusting the test temperature inside the sample can; the sample can is provided with a sealing cover for sealing it, and the sealing cover is provided with a pressure regulating component for adjusting the pressure inside the sample can.

[0005] Furthermore, the interior of the sample tank is configured to place a test bottle for the metal to be tested. The space between the test bottle and the inner wall of the sample tank is filled with a heat-conducting medium. The test bottle is filled with coolant and the metal test piece to be tested is placed inside to ensure full contact, thereby testing the acid resistance of the metal test piece at a specific temperature.

[0006] Furthermore, the test bottle is made of transparent material, which makes it convenient to observe the changes in the appearance and performance of the coolant after the test is completed; the mouth of the test bottle is closed inward, and the height of the heat-conducting medium is 3-5 cm lower than the height of the mouth of the test bottle. During the test, while ensuring that the heat-conducting medium quickly changes the test temperature in the test bottle, it prevents the heat-conducting medium from entering the test bottle and contaminating the coolant, thereby affecting the accuracy of the test results.

[0007] Furthermore, the pressure regulating assembly includes a gas cylinder sealed with the sample tank and a valve for pressurizing or releasing pressure. The gas cylinder is connected to the sample tank through a connecting pipe. By opening the inflation valve or the deflation valve, the pressure in the test bottle is adjusted to test the acid resistance of the metal specimen under specific temperature and pressure conditions.

[0008] Furthermore, the connecting tube can be the soft connecting tube that comes with the gas cylinder. The heating device includes a container and a heat-insulating medium. A heater is disposed within the container. The heater includes a horizontal section connected to each other and an inclined section for preventing the soft connecting tube from bending. The sample tank is tilted on the inclined section of the heater at an angle of 45-60 degrees. In this case, a separate connecting tube is not required, simplifying the configuration and operation process. The inclined setting avoids bending of the soft connecting tube, thereby ensuring smooth inflation or deflation of the sample tank and stabilizing the internal air pressure. At the same time, the greater the inclination, the longer the heater is, the faster the temperature rise in the sample tank is, and the more accurate the simulation of the changes in material properties under the rapid heating of the engine is.

[0009] Furthermore, an air tightness test assembly is provided on the connecting pipe, and an air tightness test is performed before the sample is tested to ensure the stability of the air pressure in the sample tank during the test.

[0010] Furthermore, a rotating assembly is provided at the bottom of the sample tank for fully mixing the metal to be tested with the coolant, thereby ensuring that each metal specimen to be tested is completely immersed in the coolant during the test.

[0011] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. Real simulation test of the acid resistance of metal materials under different temperatures and pressures under actual use conditions of coolant; 2. Simple structure and easy operation. By using the soft connecting tube of the gas cylinder, the sample tank is tilted and set on the inclined section of the heater, which ensures the stability of the air pressure in the tank and increases the temperature rise rate in the tank to make the simulated environment closer to the use state; 3. The airtightness test component ensures the stability of the pressure in the sample tank, thereby ensuring the authenticity of the simulated environment; 4. The rotating component ensures that each metal test piece to be tested is completely immersed in the coolant during the test, thereby ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure inside the sample tank of the utility model. DETAILED DESCRIPTION

[0014] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0015] Example 1

[0016] like Figure 1 The device for testing metal acid resistance shown in the figure comprises a sample tank 4 for holding the metal to be tested, a sealing cover 5 for sealing the sample tank 4, an air inlet provided on the sealing cover 5, a gas cylinder 8 in a pressure regulating assembly connected to the air inlet via a soft connecting tube 6, a valve 7 for pressurizing or releasing pressure and an air tightness test assembly provided on the soft connecting tube 6; Figure 2 As shown, a test bottle 11 for placing the metal to be tested is disposed within the sample tank 4. A heat-conducting medium 12 is filled between the test bottle 11 and the inner wall of the sample tank 4. The test bottle 4 is made of transparent borosilicate glass with an inwardly tapered mouth. The height of the heat-conducting medium 12 is 3-5 cm lower than the mouth of the test bottle 11. A metal specimen 13 to be tested is secured within the test bottle 11 via a fixture 14. A heating device for adjusting the test temperature within the sample tank 4 comprises a container 1 and a heat-insulating medium 2. A heater 3 is disposed within the container 1. The heater 3 comprises interconnected horizontal sections and an inclined section for preventing bending of the flexible connecting tube 6. The sample tank 4 is tilted 45° onto the inclined section of the heater 3 (the inclination can also be set between 45° and 60° depending on the bending conditions of the hose and the rate of temperature rise). A rotating assembly 9 is disposed at the bottom of the inclined section for thoroughly mixing the metal to be tested with the coolant.

[0017] Example 2

[0018] The difference from Example 1 is that the gas cylinder 8 is connected to the air inlet on the sealing cover 5 through a hard, anti-bending connecting tube 6, the sample tank 4 is arranged on the heater 3 at the bottom of the heating device, and a rotating component 9 is provided at the bottom of the heater 3 for fully mixing the metal to be tested with the coolant.

[0019] The steps of using the above-mentioned testing device to test the acid resistance of the metal to be tested include:

[0020] S1: The metal test piece 13 to be tested is placed in the test bottle 11 through the fixing device 14, and the test bottle 11 is placed in the sample tank 4. The space between the test bottle 11 and the inner wall of the sample tank 4 is filled with the heat-conducting medium 12 (pure water), and the sealing cover 5 is closed.

[0021] S2: Open valve 7 to fill the sample tank 4 with an appropriate amount of gas. After the air tightness test is passed, fill or release air into the sample tank 4 according to the test requirements (the gas to be filled or released can be oxygen or other gases according to the test requirements) and adjust to the required test pressure;

[0022] S3: Fix the sample tank 4 on the heater 3 through the base 10 and connect the rotating assembly 9, start the heater 3 and the rotating assembly 9, and accurately adjust the temperature required for the test through the monitoring system;

[0023] S4 After soaking for a certain period of time under specific temperature and pressure conditions, the test bottle 11 is taken out and the acid resistance of the metal test piece 13 is evaluated by evaluating the physical and chemical properties of the coolant therein and the weight loss of the metal test piece 13 to be tested.

[0024] The results of testing the metal specimens under different conditions in the coolant using the above method are shown in Tables 1 and 2.

[0025] Tables 1 and 2 show that the weight loss of the metal sheet before and after testing varies significantly under different inflation conditions. Under oxygen, the metal sheet experienced a greater weight loss and higher levels of formic acid and acetic acid in the coolant, indicating that the metal sheet was more corroded under conditions of sufficient oxygen. During the coolant development process, by adjusting the coolant's composition and ratio, and measuring the weight loss of the metal sheet and the formic acid and acetic acid content in the coolant using the above method, we can indirectly assess the coolant's acid resistance.

[0026] Table 1 Acid resistance of coolant under oxygen filling conditions

[0027]

[0028] Table 2 Acid resistance of coolant under air filling condition

[0029]

[0030] By adjusting the inflation conditions to simulate the actual usage conditions, the metal sheet to be tested is placed in different coolant samples to test the acid resistance of the metal sheet to be tested, thereby guiding the development of better coolants, thereby reducing corrosion to various metal materials in the vehicle cooling and heat dissipation system, and at the same time increasing the service life of the coolant.

Claims

1. A metal acid resistance testing device, comprising a sample tank (4) for holding the metal to be tested and a heating device for adjusting the test temperature inside the sample tank (4); characterized in that: The sample tank (4) is provided with a sealing cover (5) for sealing the sample tank (4), and the sealing cover (5) is provided with a pressure regulating component for adjusting the pressure in the sample tank (4).

2. The metal acid resistance testing device according to claim 1, characterized in that: The sample tank (4) is internally provided with a test bottle (11) for placing the metal to be tested, and the space between the test bottle (11) and the inner wall of the sample tank (4) is filled with a heat-conducting medium (12).

3. The metal acid resistance testing device according to claim 2, characterized in that: The test bottle (11) is made of a transparent material, and its mouth is closed inwards.

4. The metal acid resistance testing device according to claim 2, characterized in that: The height of the heat-conducting medium (12) is lower than the height of the bottle mouth of the test bottle (11).

5. The metal acid resistance testing device according to claim 1, characterized in that: The pressure regulating assembly comprises a gas cylinder (8) sealedly connected to the sample tank (4) and a valve (7) for pressurizing or releasing pressure. The gas cylinder (8) is connected to the sample tank (4) via a connecting pipe (6).

6. The metal acid resistance testing device according to claim 5, characterized in that: The connecting pipe (6) is a soft connecting pipe; the sample tank (4) is arranged obliquely in the heating device.

7. The metal acid resistance testing device according to claim 6, characterized in that: The heating device comprises a container (1) and a heat-insulating medium (2); a heater (3) is arranged in the container (1); the heater (3) comprises horizontal sections connected to each other and an inclined section for preventing a soft connecting tube (6) from bending; and the sample tank (4) is arranged obliquely on the inclined section of the heater (3).

8. The metal acid resistance testing device according to claim 5 or 6, characterized in that: The sample tank (4) is tilted at 45-60 degrees.

9. The metal acid resistance testing device according to claim 5 or 6, characterized in that: An airtightness test assembly is provided on the connecting pipe (6).

10. The metal acid resistance testing device according to claim 1, characterized in that: The bottom of the sample tank (4) is provided with a rotating assembly (9) for fully mixing the metal to be tested with the coolant.

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