Fuel automobile engine coolant mixing test method

Abstract

The invention discloses a fuel automobile engine coolant mixing test method, which specifically comprises the following steps: uniformly mixing a coolant sample to be mixed with an original coolant, carrying out a high-temperature stability test, if the tested mixed sample is transparent, non-layered and free of precipitates, carrying out the next step, otherwise, judging that mixing cannot be carried out, and ending the test; carrying out an engine coolant glassware corrosion test on the mixed sample, if the corrosion test meets the GB29743.1-2022 requirement, carrying out the next step, otherwise, judging that mixing cannot be carried out, and ending the test; the mixed sample is subjected to an engine coolant cast aluminum alloy heat transfer corrosion test, if engine coolant cast aluminum alloy corrosion meets the GB29743.1-2022 requirement, it is indicated that the two coolants can be mixed, and otherwise it is judged that the two coolants cannot be mixed. The method can quickly and accurately judge whether the cooling liquid can be mixed for use or not, and can prevent insoluble substances generated by mixing use of the cooling liquid from influencing the use performance of the cooling liquid.

Description

Technical Field

[0001] The invention belongs to the technical field of coolants, and in particular relates to a mixing test method for coolants of fuel automobile engines. Background Art

[0002] When car manufacturers or users replace other brands of coolant, some of the original coolant remains in the cooling system, and there are many types of coolants. When users replace coolants, there is a possibility that the new coolant is mixed with the old coolant. Different coolants have different formulas, and additives are easy to react with each other. If the mixing test is not performed before mixing, the additives in the two coolants are easy to react to form insoluble substances, which affects the performance of the coolant. Summary of the invention

[0003] The purpose of the present invention is to provide a fuel automobile engine coolant mixing test method, which can quickly and accurately determine whether fuel automobile engine coolants can be mixed.

[0004] The technical solution adopted by the present invention is a fuel automobile engine coolant mixing test method, which is specifically implemented according to the following steps:

[0005] Step 1, mix the fuel automobile engine coolant sample to be mixed with the original coolant evenly, and perform a high temperature stability test. If the mixed sample is transparent, non-stratified and has no sediment after the test, proceed to the next step, otherwise it is determined that it cannot be mixed and the test is terminated;

[0006] Step 2, subjecting the mixed sample after step 1 to an engine coolant glassware corrosion test. If the corrosion test meets the requirements of GB29743.1-2022, proceed to the next step; otherwise, it is determined that the mixture cannot be mixed and the test is terminated;

[0007] Step 3, subjecting the mixed sample after step 2 to an engine coolant cast aluminum alloy heat transfer corrosion test. If the engine coolant cast aluminum alloy corrosion meets the requirements of GB29743.1-2022, it indicates that the two coolants can be mixed, otherwise it is determined that they cannot be mixed.

[0008] The present invention is also characterized in that:

[0009] In step 1, the test temperature is 90°C-145°C, and the test time is 70h-172h.

[0010] In step 1, a high temperature stability device is used for the high temperature stability test, and the high temperature stability device includes a reactor and a magnetic stirrer. The reactor is located on the magnetic stirrer, and an upper cover is provided on the top of the reactor. A thermocouple is also provided in the reactor; a sampling pipeline is also provided in the reactor, one end of the sampling pipeline extends out of the upper cover, and a sampling valve is provided on the sampling pipeline; a pressure pipeline is also provided in the reactor, one end of the pressure pipeline extends out of the upper cover, a pressure gauge is provided on the pressure pipeline, and branch pipelines are respectively connected on both sides of the pressure pipeline, and a compressed air valve and a pressure relief valve are respectively provided on the two branch pipelines.

[0011] In step 2, the test conditions are: temperature of 88°C-130°C, air flow of 100mL / min-150ml / min, corrosion ion concentration of 100ppm-200ppm, and test time of 120h-336h.

[0012] In step 2, a corrosion test device is used for the glassware corrosion test. The corrosion test device includes a test beaker and a condensation device. A gas flow detector is arranged at the bottom of the test beaker, a rubber plug cover is arranged at the top of the test beaker, a gas diffusion head is arranged in the test beaker, and one end of the gas diffusion head extends out of the rubber plug cover; a metal test piece group is arranged in the test beaker, and the metal test piece group is placed at the bottom of the test beaker. The condensation device is vertically arranged in the test beaker, and one end extends out of the rubber plug cover.

[0013] In step 3, the test conditions are: temperature 135°C-145°C, test pressure 0.19Mpa-0.35Mpa, and test time 72h-168h.

[0014] The beneficial effects of the present invention are as follows: in the method of the present invention, the high temperature stability test is to examine the high temperature stability performance of the mixed coolant during use, the glassware corrosion is to examine the anti-metal corrosion of the mixed coolant, and the cast aluminum heat transfer corrosion is to examine the heat transfer corrosion performance of the cast aluminum alloy between coolants. The present invention finally obtains a coolant mixing test scheme through experimental studies such as pH value, foam tendency, high temperature stability, glassware corrosion, and cast aluminum alloy heat transfer corrosion. The method can quickly and accurately determine whether coolants can be mixed and used, and automobile manufacturers and coolant users can avoid the generation of insoluble substances when mixing coolants, which affects the performance of the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a high temperature stability device in a fuel automobile engine coolant mixing test method of the present invention;

[0016] Figure 2 It is a structural schematic diagram of a corrosion test device in a fuel automobile engine coolant mixing test method of the present invention.

[0017] In the figure, 1. pressure gauge, 2. thermocouple, 3. compressed air valve, 4. upper cover, 5. sampling valve, 6. sampling pipeline, 7. reactor, 8. magnetic stirrer, 9. pressure relief valve, 10. pressure pipeline, 11. test beaker, 12. gas flow detector, 13. upper rubber plug cover, 14. gas diffusion head, 15. condensation device, 16. metal test piece group. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with specific implementation modes and accompanying drawings.

[0019] The fuel automobile engine coolant mixing test method of the present invention is specifically implemented according to the following steps:

[0020] Step 1, mix the fuel automobile engine coolant sample to be mixed with the original coolant evenly, and perform a high temperature stability test. If the mixed sample is transparent, non-stratified and has no sediment after the test, proceed to the next step, otherwise it is determined that it cannot be mixed and the test is terminated;

[0021] The test temperature is 90℃-145℃, and the test time is 70h-172h;

[0022] Step 2, subjecting the mixed sample after step 1 to an engine coolant glassware corrosion test. If the corrosion test meets the requirements of GB29743.1-2022, proceed to the next step; otherwise, it is determined that the mixture cannot be mixed and the test is terminated;

[0023] The test conditions are: temperature of 88°C-130°C, air flow of 100mL / min-150ml / min, corrosion ion concentration of 100ppm-200ppm, and test time of 120h-336h.

[0024] Step 3, subjecting the mixed sample after step 2 to an engine coolant cast aluminum alloy heat transfer corrosion test. If the engine coolant cast aluminum alloy corrosion meets the requirements of GB29743.1-2022, it indicates that the two coolants can be mixed, otherwise it is determined that they cannot be mixed.

[0025] The test conditions are: temperature 135℃-145℃, test pressure 0.19Mpa-0.35Mpa, and test time 72h-168h.

[0026] Wherein, in step 1, a high temperature stability device is used for high temperature stability test, such as Figure 1As shown, it includes a reactor 7 and a magnetic stirrer 8, the reactor 7 is located on the magnetic stirrer 8, an upper cover 4 is arranged on the top of the reactor 7, and a thermocouple 2 is also arranged in the reactor 7; a sampling pipeline 6 is also arranged in the reactor 7, one end of the sampling pipeline 6 extends out of the upper cover 4, and a sampling valve 5 is arranged on the sampling pipeline 6; a pressure pipeline 10 is also arranged in the reactor 7, one end of the pressure pipeline 10 extends out of the upper cover 4, a pressure gauge 1 is arranged on the pressure pipeline 10, and branch pipelines are respectively connected to both sides of the pressure pipeline 10, and a compressed air valve 3 and a pressure relief valve 9 are respectively arranged on the two branch pipelines;

[0027] The working principle of the high temperature stability device is: place the solution to be tested in the reactor 7, install the upper cover 4, use the magnetic stirrer 8 to stir and heat the entire solution to be tested, connect the compressed air valve 3 to the air source to pressurize the inside of the test device, the solution temperature can be tested by the thermocouple 2, and the pressure gauge 1 can measure the pressure value. After the test is completed, stop heating the test device, cool it naturally, open the pressure relief valve 9 to release the pressure, and open the sampling valve 5 to take samples for relevant tests.

[0028] Wherein, in step 2, the glassware corrosion test is conducted using a corrosion test device such as Figure 2 As shown, it includes a test beaker 11 and a condensation device 15. A gas flow detector 12 is arranged at the bottom of the test beaker 11, an upper rubber plug cover 13 is arranged at the top of the test beaker 11, a gas diffusion head 14 is arranged in the test beaker 11, and one end of the gas diffusion head 14 extends out of the upper rubber plug cover 13; a metal test piece group 16 is arranged in the test beaker 11, and the metal test piece group 16 is placed at the bottom of the test beaker 11, and the condensation device 15 is vertically arranged in the test beaker 11, and one end of the gas diffusion head 14 extends out of the upper rubber plug cover 13.

[0029] Put the assembled metal test piece group 16 into the test beaker 11, put the test solution in the test beaker 11, insert the gas diffusion head 14 into the test beaker solution through the upper rubber plug cover 13 to let air in, use the condensation device 15 to perform condensation reflux, use the gas flow detector 12 to measure the air flow value in the solution, and the measured value meets the use requirements.

[0030] Example 1

[0031] Step 1, 50 ml of fuel automobile engine coolant mixed with sample a is added into a 95°C high temperature stability test device for 172 hours.

[0032] Step 2, the fuel automobile engine coolant is mixed with sample a to conduct an engine coolant glassware corrosion test, the temperature is 95°C, the air flow rate is 100ml / min, the corrosion ion is 130ppm, and the test time is 240h.

[0033] Step 3, the fuel automobile engine coolant mixed with sample a is subjected to a coolant cast aluminum alloy heat transfer corrosion test at a temperature of 135°C, a test pressure of 0.25 MPa, a corrosive water of 300 mg sodium chloride dissolved in 1 L of distilled water, and a test time of 144 h.

[0034] After the high temperature stability test in step 1, the mixed sample showed precipitation, and it was determined that the mixed sample a could not be mixed.

[0035] Example 2

[0036] Step 1, 80 ml of fuel automobile engine coolant mixed with sample b is added into a 105°C high temperature stability test device for 160 hours.

[0037] Step 2, the fuel automobile engine coolant is mixed with sample b to conduct an engine coolant glassware corrosion test, the temperature is 105°C, the air flow is 110ml / min, the corrosion ion is 120ppm, and the test time is 200h.

[0038] Step 3, the fuel automobile engine coolant is mixed with sample b to conduct a coolant cast aluminum alloy heat transfer corrosion test, the temperature is 140°C, the test pressure is 0.35Mpa, the corrosion water is 330mg sodium chloride dissolved in 1L of distilled water, and the test time is 120h.

[0039] After the high temperature stability test in step 1, the mixed sample b was transparent, without stratification and without precipitation. The engine coolant glassware corrosion test result of the mixed sample b in step 2 did not meet the requirements of GB29743.1-2022, and it was determined that it could not be mixed.

[0040] Example 3

[0041] Step 1, 100 ml of fuel automobile engine coolant mixed with sample c is added into a 130°C high temperature stability test device for 168 hours.

[0042] Step 2, the fuel automobile engine coolant is mixed with sample c to conduct an engine coolant glassware corrosion test, the temperature is 120°C, the air flow is 120ml / min, the corrosion ion is 150ppm, and the test time is 180h.

[0043] Step 3, the fuel automobile engine coolant mixed sample c is subjected to a coolant cast aluminum alloy heat transfer corrosion test, the temperature is 145°C, the test pressure is 0.45Mpa, the corrosion water is 200mg sodium chloride dissolved in 1L of distilled water, and the test time is 95h.

[0044] After the high temperature stability test in step 1, the mixed sample c is transparent, non-stratified and has no sediment. The engine coolant glassware corrosion test and the engine coolant cast aluminum alloy corrosion test results of the mixed sample c in step 2 meet the requirements of GB29743.1-2022, and it is determined that it can be mixed.

Claims

1. A fuel vehicle engine coolant mixing test method, characterized in that: Follow the steps below to implement it: Step 1, mix the fuel automobile engine coolant sample to be mixed with the original coolant evenly, and perform a high temperature stability test. If the mixed sample is transparent, non-stratified and has no sediment after the test, proceed to the next step, otherwise it is determined that it cannot be mixed and the test is terminated; Step 2, subjecting the mixed sample after step 1 to an engine coolant glassware corrosion test. If the corrosion test meets the requirements of GB29743.1-2022, proceed to the next step; otherwise, it is determined that the mixture cannot be mixed and the test is terminated; Step 3, subjecting the mixed sample after step 2 to an engine coolant cast aluminum alloy heat transfer corrosion test. If the engine coolant cast aluminum alloy corrosion meets the requirements of GB29743.1-2022, it indicates that the two coolants can be mixed, otherwise it is determined that they cannot be mixed.

2. The fuel automobile engine coolant mixing test method according to claim 1, characterized in that: In the step 1, the test temperature is 90° C.-145° C., and the test time is 70 h-172 h.

3. The fuel automobile engine coolant mixing test method according to claim 1, characterized in that: In the step 1, a high temperature stability device is used during the high temperature stability test, and the high temperature stability device comprises a reactor (7) and a magnetic stirrer (8), wherein the reactor (7) is located on the magnetic stirrer (8), and an upper cover (4) is arranged on the top of the reactor (7), and a thermocouple (2) is also arranged in the reactor (7); a sampling pipeline (6) is also arranged in the reactor (7), one end of the sampling pipeline (6) extends out of the upper cover (4), and a sampling valve (5) is arranged on the sampling pipeline (6); a pressure pipeline (10) is also arranged in the reactor (7), one end of the pressure pipeline (10) extends out of the upper cover (4), and a pressure gauge (1) is arranged on the pressure pipeline (10), and branch pipelines are respectively connected to both sides of the pressure pipeline (10), and compressed air valves (3) and pressure relief valves (9) are respectively arranged on the two branch pipelines.

4. The fuel automobile engine coolant mixing test method according to claim 1, characterized in that: In step 2, the test conditions are: temperature of 88°C-130°C, air flow of 100mL / min-150ml / min, corrosion ion concentration of 100ppm-200ppm, and test time of 120h-336h.

5. The fuel automobile engine coolant mixing test method according to claim 1, characterized in that: In step 2, a corrosion test device is used during the glassware corrosion test, wherein the corrosion test device comprises a test beaker (11) and a condensation device (15); a gas flow detector (12) is arranged at the bottom of the test beaker (11); a rubber plug cover (13) is arranged at the top of the test beaker (11); a gas diffusion head (14) is arranged in the test beaker (11), and one end of the gas diffusion head (14) extends out of the rubber plug cover (13); a metal test piece group (16) is arranged in the test beaker (11), and the metal test piece group (16) is placed at the bottom of the test beaker (11); and the condensation device (15) is vertically arranged in the test beaker (11), and one end of the gas diffusion head (14) extends out of the rubber plug cover (13).

6. The fuel automobile engine coolant mixing test method according to claim 1, characterized in that: In step 3, the test conditions are: temperature 135°C-145°C, test pressure 0.19Mpa-0.35Mpa, and test time 72h-168h.

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