What does car antifreeze do? What is the role of automotive antifreeze?

Anti-corrosion function, antifreeze.

The boiling point is high. The boiling point of water is 100 °C, high quality antifreeze coolant.

The boiling point is usually above zero 110, so in the summer use, antifreeze coolant is more difficult to boil than water. Cooling water in a water-cooled engine.

A low-freezing cooling liquid prepared with the addition of antifreeze. When the temperature is lower than 0, the use of antifreeze can prevent the failure of the cooling system and the expansion and cracking of parts caused by the freezing of the cooling water, and can also eliminate the work of releasing water after collecting the car and adding water before leaving the car.

Antifreeze is the cooling medium that circulates in the engine cooling system. As we all know, the working state of the cooling system is closely related to the working condition of the car, once the cooling system has a problem, it may even injure the engine and cause the consequences such as pulling the cylinder, which shows that antifreeze is not optional, but very important.

Antifreeze has two qualities: low freezing point and high boiling point. Therefore, it can not only ensure the normal operation of the car cooling system in winter, but also prevent the cooling water from boiling in summer and avoid the situation of "boiling".

In addition, antifreeze usually has the effect of preventing rust and corrosion. In the cooling system, there are metallic materials and non-metallic materials, and the anti-rust and anti-corrosion characteristics of antifreeze can slow down the aging of the entire cooling system. Limescale is also often formed in the cooling system, which can cause clogging of the circulation pipes, which in turn can affect the engine.

Antifreeze has the function of waterproofing and scale, which can reduce this hidden danger.

Is such an important antifreeze to be checked from time to time?

It seems that the role of antifreeze should not be underestimated, so do you have to pay attention to antifreeze at all times? Master Li told that generally speaking, if there is nothing abnormal in the car, there is no need to check the antifreeze. However, if there is a water leak in the car, especially if the leakage is colored liquid, you need to pay attention to whether the antifreeze is leaking.

In addition, if the car has just been repaired, especially if it has just been replaced with parts such as water tanks, pumps, and water pipes; Or if you are going to go on a long journey, it is also necessary to check the antifreeze again.

It is worth mentioning that some people think that the south is not cold and that antifreeze is not very useful, which is not right. In winter, if the car is parked outdoors and the temperature is below freezing, the entire engine block may freeze if there is no antifreeze.

How do I check and change my antifreeze?

The first step is to determine the location of the antifreeze backup box. Open the hood, the antifreeze spare box is usually in a more obvious position, and the antifreeze inside is generally colored, but the specific purple, green, and blue depends on the specific model. There is also an identification mark on the lid of the tank, which must be distinguished from the glass water tank, brake tank and power steering tank.

There are two cordons in this spare box, one for the highest and one for the lowest. If the water level is too low, it means that antifreeze needs to be replenished.

In addition, by looking at the color of the antifreeze, it is possible to determine whether the antifreeze needs to be replaced. In general, the color of the antifreeze has faded and it may need to be replaced. However, Master Li reminded that this observation is not accurate, and the process of replacing antifreeze is more troublesome, so if you feel that you need to replace the antifreeze, you still have to find a professional to operate.

Normally, antifreeze needs to be replaced every two years.

Antifreeze also has several advantages:

The first one is the anti-corrosion function. The engine and its cooling system are made of metal, including copper, iron, aluminum, steel and solder. These metals come into contact with water at high temperatures, and over time, they will be corroded and rusted.

Antifreeze not only does not corrode the engine cooling system, but also has anti-corrosion and rust removal functions.

The second is that the boiling point of antifreeze is high. The boiling point of water is 100 degrees Celsius, and the boiling point of high-quality antifreeze coolant is usually 110 degrees Celsius above zero, so that in the summer, antifreeze coolant is more difficult to boil than water.

The third is that antifreeze can prevent scale, using water as coolant is the most headache for drivers is the problem of scale, scale adheres to the metal surface of the water tank and water jacket, making the heat dissipation effect worse and worse, and it is also difficult to remove. The high-quality antifreeze is made of distilled water and added with anti-scale additives, which not only does not produce limescale but also has the function of descaling. Of course, if your tank is very thick with limescale, it is best to thoroughly wash it with tank cleaner before adding antifreeze.

Antifreeze is a kind of coolant containing special additives, mainly used in liquid-cooled engine cooling system, antifreeze has excellent properties such as antifreeze in winter, boiling in summer, waterproof scale and anti-corrosion throughout the year.

Inferior antifreeze can corrode the tank.

The main function of car antifreeze is to cool down the engine, there is no other role, the characteristics of antifreeze is antifreeze, it will not freeze when stored at low temperature, good fluidity, and good heat dissipation!

The main function of antifreeze for automobiles is to prevent the water pipes of the water tank from freezing in the case of low temperatures in some relatively cold places.

Automobile antifreeze is called automobile engine antifreeze coolant, and its main function is to take away the heat of the engine through the cooling circulation system.

The main role of automobile antifreeze is to cool the engine, which is the same as the original cooling water, and the quality is better than that of cooling water and antifreeze.

1. Cooling effect.

Cooling is the basic function of coolant. The engine generates a lot of heat when it works, 60% of which is dissipated into the surrounding space through the cooling system. Water and methanol coolants have a low boiling point and are prone to boiling, which can cause engine damage or even paralysis even for a short period of time if the vehicle works under coolant boiling conditions.

2. Anti-corrosion.

The radiator, water pump, cylinder block and cylinder head, water distribution pipe and other components in the cooling system are composed of steel, cast iron, brass, copper, aluminum, tin and other metals, due to the different electrode potentials of different metals, electrochemical corrosion is easy to occur under the action of electrolyte, and the acidic products formed after the decomposition of diols in the coolant and the acidic exhaust gas formed after fuel combustion may also penetrate into the cooling system and promote the corrosion of the cooling system.

Corrosion of the cooling system will cause the downwater chamber of the radiator tank, the fuel injector spacer, the cooling pipe, the joint and the water tank pipe to fail, and at the same time the corrosion products will block the pipeline, causing the engine to overheat or even paralyzed, if the corrosion is perforated, the coolant will penetrate into the combustion chamber or crankcase will cause serious damage, because when the coolant or water is mixed with the lubricating oil, the oil and gum will be generated, and the lubrication will be weakened, so that the valve, the hydraulic valve push rod and the piston ring will be bonded. Therefore, a certain amount of anti-corrosion additives are added to the coolant to prevent corrosion in the cooling system.

3. Anti-scaling effect.

The scale in the cooling system is more than calcium ions, magnesium ions and other cations in the water, and these alkaline earth metal cations are easy to react with the anions in the water to form scale under heat load conditions. Scale can wear the pump seal and cover the outer wall of the cylinder block, reducing its thermal conductivity and causing the temperature of the cylinder head to increase sharply in the high temperature area, causing cylinder cracking.

Therefore, in order to reduce the formation of scale, the coolant requires the use of softened deionized water during both production and filling.

4. Anti-freeze effect.

In order to keep the car in low temperature in winter, the engine coolant is added with some substances that can reduce the freezing point of water as antifreeze to keep the cooling system from freezing in low temperatures. For this reason, coolant is sometimes referred to as "antifreeze" or "antifreeze".

1. Lower the freezing point.

2. Increase the boiling point.

3. Anti-corrosion.

4. Antioxidant.

In addition to the main function of using antifreeze to ensure that the engine works normally at low temperatures, there are some other auxiliary functions of antifreeze simple contact fluid.

Anti-corrosion function.

The engine and its cooling system are mainly composed of metal, and the metal will be corroded and easily rusted after being in contact with the oak buried water for a long time at high temperatures. The use of antifreeze not only does not corrode the engine cooling system, but also has anti-corrosion and rust removal functions.

It is not easy to cause Liang to "open the pot".

Antifreeze has a higher boiling point than water, so it is more difficult to boil with antifreeze coolant than water in the summer.

Anti-scale function. When water is used as a coolant for a long time, it will produce scale, which will adhere to the metal surface of the water tank and water jacket, making it less and less effective in heat dissipation, and it is difficult to remove the gutter. High-quality antifreeze is not only made of distilled water, but also added with anti-scale additives, which not only does not produce scale, but also has the function of descaling.

Antifreeze is essentially the medium of heat exchange in the engine, the excess heat of the engine needs to be dissipated, and the engine needs to be cooled before preparation, there are usually two ways, namely air cooling and water cooling, air cooling is not, the original motorcycle is air-cooled, water-cooled, that is, the coolant is heated first, and the hot coolant then imitates the wild clear into the heat dissipation water tank, and blows the water phase through the fan, and then enters the engine water jacket after reducing the temperature of the coolant. The role of coolant is to carry heat. Originally, water-cooled engines used water, which would freeze in winter, so now we sell it with a ridge of cooling medium that can prevent freezing, which is antifreeze.