Method of glycol concentration quality in antifreeze index

According to the survey, more than 50% of global automotive engine failures originate from the cooling system! This shows the importance of a rational choice of antifreeze. Most of the antifreeze liquids sold on the market are ethylene glycol-based products, and then add appropriate amounts of organic or inorganic salts to achieve anti-corrosion and rust prevention. At present, more than 95% of water-based antifreeze fluids using ethylene glycol at home and abroad are compared with tap water. The most significant feature of ethylene glycol is antifreeze, and water cannot prevent freezing. Secondly, ethylene glycol has a high boiling point, low volatility, moderate viscosity and small changes with temperature, and good thermal stability. Therefore, ethylene glycol antifreeze is an ideal coolant.



As the weather turns cold, the tank is prone to cracking due to freezing and the choice of antifreeze is a top priority for the health of the car's heart. Antifreeze is called antifreeze coolant. It has antifreeze in winter and anti-boiling in summer. It protects the engine's cooling system, improves heat dissipation, and improves engine efficiency.



The basic indicators of antifreeze are freezing point and boiling point. Under normal circumstances, the lower the better the freezing point, the freezing point of the selected antifreeze should generally be less than the local minimum temperature of 10 °C or more, in preparation for sudden changes in the weather. For example, the multi-effect antifreeze produced by Great Wall Lubricants has a freezing point in the range of -25°C to -50°C, which can meet the antifreeze requirements of vehicles in most regions in northern China.



The freezing point of ethylene glycol and water antifreeze is not linear with the mass fraction of ethylene glycol. The freezing point of its aqueous solution does not completely decrease with increasing concentration. When the concentration exceeds 70%, the freezing point rises instead. Therefore, in the preparation process, reasonable selection should be made from the actual point of view in order to achieve the requirements of antifreeze and economy, and prepare the antifreeze solution. In Jiangnan of China, the proportion of ethylene glycol with a mass fraction of 40% is generally used, while in the cold northern China, the proportion of about 50% of the mass fraction of ethylene glycol is appropriate.



Formulation of loader antifreeze

name

Said

ingredient%

Composition ratio

Condensation point °C

≤

Ethylene glycol

alcohol

glycerin

water

Ethylene glycol

antifreeze

60

 

 

40

Volume ratio

-55

55

 

 

45

-40

50

 

 

50

-32

40

 

 

60

-twenty two

alcohol

glycerin

antifreeze

 

30

10

60

Weight ratio

-18

 

40

15

45

-26

 

42

15

43

-32


In the preparation process, reasonable selection should be made from the actual point of view in order to achieve the requirements of antifreeze and economy. In Jiangnan of China, the proportion of glycol with a mass fraction of 40% is generally used, while in cold northern China, the proportion of about 50% of the mass fraction of ethylene glycol is appropriate.



PAL-91S and PAL-92S Mini Digital Glycol Refractometer, known as Antifreeze Concentration Meter, Freezing Point Concentration Meter, is professionally applied to the measurement of ethylene glycol solution, and shows its solution concentration and freezing temperature. Its simple operation, quick display, and stable repeatability can better help our customers in the measurement of frozen liquids (name: antifreeze refractometer), ensuring the normal operation and service life of the car.



For more antifreeze, snowmelt, and freezing point measurement solutions, we will enthusiastically provide a complete, fast on-site analysis trial, please contact Guangzhou AiSheng Scientific Instrument Co., Ltd. Looking forward to your inquiry

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