Antifreeze is called a cooling liquid, whichUsed in car cooling systems. According to the percentage composition of G11 and G12 liquids, the ethylene glycol content is 90%, the additives - from 5 to 7%, and water - from 3 to 5%. Many do not know what antifreeze G11 and G12 is, what is the difference between them, and also whether they can be mixed. Today we will try to answer all these questions.
On the composition of liquid G11
Antifreezes with the G11 marking representsolution of silicates with inorganic additives. Cooling liquids of this class were used earlier and are now used for cars that were produced before 1996. This is an ordinary antifreeze.
Features of liquids class G12
Many used for their carsantifreeze G11, or simply antifreeze. These people are wondering about the togmas, and is there a difference between antifreeze and antifreeze G12. Cooling liquids of this class differ in composition based on carboxylate organic substances and compounds. The main difference between antifreeze G11 and G12 is the use of different additives. G12 has a higher boiling point. It is 115-120 degrees.
As for the period of operation,manufacturers state that the product is capable of not losing its properties for 5 years. Therefore, many people use antifreeze G12. Its technical characteristics are much higher. Also, the difference between the G12 is that it is designed for cars where the engine is designed for high speed. Liquids of this class have a high thermal conductivity. These mixtures only affect specific foci of corrosion, but do not cover the whole system with protective films. This greatly increases the efficiency. But if the car is old, it can be filled with antifreeze G11 and G12. What is the difference between them? As we have already said, it's all about additives.
Composition of antifreeze G12
This concentrate contains 90%diatomic ethylene glycol, due to which the liquid does not freeze. Also, the concentrate contains about 5% of distilled water. In addition, dyes are used. Color allows you to identify the coolant class, but there may be exceptions. At least 5% of the composition is occupied by additives.
Ethylene glycol itself is aggressively related tonon-ferrous metals. Therefore, the composition must include phosphate and carboxylate additives. They are based on organic acids that neutralize all negative effects. Antifreezes with additives can work in different ways, and their main difference is the ways of fighting corrosion.
Technical characteristics of composition G12
It is a homogeneous and transparent liquid. There are no mechanical impurities in it, and its color is red or pink. These liquids freeze at a temperature of about -50 degrees, boil at +118. If we answer the question about what antifreeze G11 and G12 are, what is the difference, we can say that these products differ in temperature threshold.
As for the characteristics, they depend onthe concentration of ethylene glycol or propylene glycol in the solution. Often alcohol is not more than 50-60%. This allows to obtain optimal performance characteristics.
Compatibility of two types of coolant
Compatibility of antifreeze G11 and G12 excites mindsnovice motorists. They start with used cars and do not know what was pasted into the expansion tank by the previous owner. If you only need to add a little bit of coolant, then you need to know exactly what is poured into the system at the moment. Otherwise, there is a serious risk to significantly harm SOD, and not only to it, but to the entire engine. Experienced car owners recommend in case of doubt to drain all the old liquid and fill a new one.
Compatibility and color
The color of the liquid does not affect the properties andcharacteristics. Manufacturers can paint their products in different colors, but there are certain standards. The most popular formulations are painted in green, blue, red, pink, and also orange. Some standards even regulate liquids of certain shades. But the color of the coolant is the latest criterion, which must be taken into account.
Very often green means anti-freeze G11. "Lukoil" and other manufacturers produce just such products. It is believed that green is the lowest grade of G11 or a silicate product.
Compatibility by class
G11 can not be mixed with products of class G12. In this case, the latter immediately loses all its unique properties. Also they will be irretrievably lost if you slightly top up G11. The cortex formed by antifreeze seriously hinders the work of the more perfect G12. Overpay for the modern cooling liquid in this case is completely unprofitable. But here with G13, G12 and G12 + antifreeze is quite compatible. This should be remembered for all novice motorists. As for G12, it mixes well with liquids of class G12 +. However, there are G11 compounds of various manufacturers, with which one should be careful. There were cases when additives and components of one class reacted violently to each other, because of what inside the contours of the ODS car was a real jelly.
About the choice of antifreeze
When choosing the right coolant forYour car needs to be oriented not to the color and class of the product. Read what is written on the expansion tank or in the instructions to the car (which the manufacturer recommends). If the radiator was made of non-ferrous metals - brass or copper, then organic mixtures are highly undesirable. The system can rust.
So, now it's obvious that you should not mixantifreeze G11 and G12. What is the difference between them, we already know. As you can see, the main differences in additives. In the first case, organic and inorganic is used, in the second case only the last components are used. Also the 12th group has an extended service life. But it is worth noting another group - the 13th. It appeared only recently. This composition is fundamentally different from all the previous ones and assumes the availability of only environmentally friendly substances. The color of this antifreeze is purple. In Russia, it is rare, unlike the European market. Its cost is several times higher than the price for a conventional red antifreeze from the 12th group. By properties, he almost does not concede, so it makes sense to use the coolant namely G12.</ p>