Basic knowledge of antifreeze

The full name of antifreeze is “motor engine coolant”, commonly known as “antifreeze fluid”. It is the working medium of automobile cooling system and has antifreeze function. In addition, it also has anti-boiling, anti-corrosion, waterproof scale and lubricating oil cooling system. Features.

Antifreeze has antifreeze function

The freezing point of water is 0°C, and the freezing point of antifreeze can generally be lower than -25°C. In cold winter parking, it is possible to prevent the freezing night from freezing and cracking the radiator and freezing the engine block.

Antifreeze has anti-boil function

Antifreeze has a relatively high boiling point

Antifreeze has a higher boiling point than water

The boiling point refers to the temperature at which the liquid boils. As early as normal atmospheric pressure, the boiling point of water is 100°C, and the boiling point of antifreeze is generally higher than 106°C, which can effectively prevent the “opening” phenomenon of the engine.

Antifreeze has anti-corrosion function

Since the engine cooling system includes several metals such as steel, aluminum alloy, cast iron, copper, and solder used in welding of tanks, the cylinder block and cylinder head are generally made of cast aluminum or cast iron. The modern tank is mainly made of aluminum alloy. The long-term contact of the antifreeze with these metals must be able to protect all these metals. The use of deionized water and appropriate additives can effectively prevent the occurrence of various types of corrosion.

Antifreeze has a certain degree of lubrication

Antifreeze is "oily" and the use of antifreeze can reduce the wear of the circulating pump.

Antifreeze can prevent the formation of scale

Scale is caused by the presence of insoluble salts or oxide crystals on the inner surface of the cooling system. The main substances that produce scale are calcium sulfate, calcium carbonate, and magnesium carbonate. The high-quality antifreeze fluid is made of distilled water and contains anti-fouling additives. It not only has no scale but also has the function of cleaning and descaling.

Antifreeze mainly consists of antifreeze, corrosion inhibitor, defoamer, colorant, buffer, distilled water and other components.