The full name of antifreeze should be called antifreeze coolant, which means coolant with antifreeze function. Antifreeze can prevent the coolant from freezing and cracking the radiator and freezing the engine cylinder block or head during cold winter parking. Many people think that antifreeze is only used in winter, but we need to correct this misunderstanding. In fact, antifreeze is not only used in winter, it must be used all year round.

The full name of antifreeze should be called antifreeze coolant, which means coolant with antifreeze function. Antifreeze can prevent the coolant from freezing and cracking the radiator and freezing the engine cylinder when parking in cold seasons. However, we need to correct a misunderstanding. Antifreeze is not only used in winter. In the normal maintenance project of the car, the engine antifreeze needs to be replaced every year of driving, and the frequency of antifreeze replacement for special vehicles is higher.
There are many types of automobile antifreeze, such as inorganic calcium chloride (CaCl2), organic methanol (CH3OH), ethanol (C2H5OH, commonly known as alcohol), ethylene glycol (C2H4(OH)2, commonly known as sweet alcohol), glycerol (C3H5(OH)3, commonly known as glycerin), lubricating oil and our Common sugar, honey, etc. in daily life can be used as the mother liquor of antifreeze. After adding an appropriate amount of pure soft water (water containing no or a small amount of calcium and magnesium ions, such as distilled water, uncontaminated rainwater, snow water, etc., the total hardness component concentration of the water is between 0-30ppm), it can become an antifreeze in a general sense.
Because methanol and ethanol are more volatile, they are not suitable for use in northern vehicles. In addition to antifreeze, antifreeze also has the following advantages:

Anti-corrosion function: The engine and its cooling system are made of metal, including copper, iron, aluminum, steel and solder. When these metals come into contact with water at high temperatures, they will corrode and rust over time. Antifreeze not only does not cause corrosion to the engine cooling system, but also has anti-corrosion and rust removal functions.