The use of car antifreeze

The full name of antifreeze should be called antifreeze coolant, which means coolant with antifreeze function. Antifreeze can prevent the coolant from freezing and causing radiator expansion and engine cylinder block or head damage during cold winter parking. Don't think that antifreeze is only useful in winter, it should be used all year round.
The colors of antifreeze include blue, yellow, green, etc. In fact, the various colors are caused by the addition of dyes in the main component ethylene glycol. Because ethylene glycol is easily soluble in water, and the lowest freezing point can reach -68 ℃, this coolant has the characteristics of high boiling point, low foam tendency, good viscosity temperature performance, corrosion prevention and scale prevention. It is an ideal coolant and the most commonly used one at present. And dyes are only used to distinguish them from other liquids, to distinguish whether there is leakage, and have no other special functions.
Nowadays, the coloring of antifreeze is fluorescein, also known as fluorescent yellow, which is in powder form and incompatible with water. It is soluble in alcohols and when added to ethylene glycol, it appears green and fluorescent. Therefore, it is widely used as a pigment for antifreeze.
The normal operation of the engine relies on the assistance of the cooling system, among which antifreeze is an indispensable cooling medium for the normal operation of the car engine. The main function of antifreeze is to prevent the coolant from freezing and causing radiator expansion and damage to the engine cylinder block or cover during cold winter parking. In summer, when the temperature is high, it can effectively prevent boiling and avoid boiling. In addition, antifreeze also has anti rust, anti-corrosion, and engine insulation effects, making it easy to start the engine.
The chemical properties of antifreeze of different colors and brands may vary greatly, and their compositions are also different. The antifreeze available on the market includes ethylene glycol antifreeze and some phosphate antifreeze. If these two types of antifreeze are mixed, they will produce highly corrosive substances that can cause significant damage to the engine.
In addition, adding tap water only dilutes the antifreeze and reduces its anti freezing ability. Adding some water normally will not cause any problems.
It is generally recommended to travel 50000 kilometers in three years. The temperature difference between the north and south is relatively large. It is recommended to use antifreeze at -45 degrees Celsius in the north and -25 degrees Celsius in the south. It is recommended that private cars be replaced every two years or 100000 kilometers, preferably with the same brand of antifreeze; If not available, it is necessary to thoroughly clean the engine cooling system before adding antifreeze. However, it is best to inquire with the manufacturer and use the original antifreeze provided by the car manufacturer.
Some driver friends use water as coolant throughout the summer, causing a layer of scale to form in the engine cooling system, which can block water pipes in severe cases. Therefore, do not directly supplement tap water. Instead, add distilled water or deionized water. If conditions do not permit, adding cold boiled water is better than adding tap water. When adding antifreeze, pay attention to the upper and lower limit markings of MAX and MIN on the edge of the antifreeze kettle. When the liquid level is below the lower limit during cold driving, add it. The amount added should be based on the markings on the edge of the kettle, as long as it is between the highest (MAX) and lowest (MIN).