What is antifreeze for trucks supposed to do? How to choose?The function of antifreeze
Antifreeze, as the name suggests, has antifreeze function, but the freezing point of various antifreezes is different, which is also determined by different ambient temperatures in different regions. The freezing point of today's antifreeze is generally between -15°C and -68°C.
Because the engine cooling system contains five kinds of metals: cast iron, aluminum alloy, steel, copper and solder used for welding the water tank. Antifreeze is in contact with these metals all the time, so it must have anti-corrosion function, and the corrosion of metal by inferior antifreeze is extremely serious. High-quality antifreeze, compared with water, can better protect the water tank and prolong the life of the engine.
3. Raise the boiling point
The boiling point of high-quality antifreeze is generally greater than 105°C, and high-quality antifreeze has a good function of "boiling" the waterproof box.
How to choose antifreeze
1. Whether there is any peculiar smell: the main component of antifreeze is ethylene glycol, and there is no peculiar smell.
2. The main components of inferior antifreeze are industrial methanol, or various types of fusel alcohol and other industrial waste. These substances have a pungent smell and are highly volatile.
3. Whether there are signs of leakage at the bottleneck: the outer packaging of inferior antifreeze is often very beautiful, but these manufacturers do not have professional filling equipment, and manual canning often has poor sealing performance, and there are signs of leakage at the bottleneck of transportation.
The antifreeze is replaced every 2-3 years. During the replacement process, there are two colors of blue and red. Different types of antifreeze cannot be mixed, otherwise it will cause chemical reactions and generate precipitation or air bubbles. Reduce the effect of use.