 Wysłany: Wto 13:09, 25 Sty 2011 Temat postu: moncler doudoune The concept of engine coolant and |
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| The concept of engine coolant and function
Construction Machinery vehicles like the cylinder is cast iron, and water tank is mainly made of copper and brass. Antifreeze corrosion is very serious all the time, many tanks in the use of antifreeze, the weld cracking and leaking, because antifreeze caused serious corrosion of the solder. In fact, contemporary high-quality antifreeze, can significantly compared with the protection of water tanks to extend the life of the engine, cooling system antifreeze to inhibit the corrosion of various metals is key to the quality antifreeze. Engine coolant at work to access a variety of metal materials, if it is corrosive metal, will affect the engine work, and even cause accidents. To make the engine coolant has good corrosion resistance, to maintain the state of the cooling liquid is alkaline, PH value of the coolant between 7.5-11.0 for the good, out of range will adversely affect the metal. Engine coolant is a concoction of chemicals, some organic coatings have an adverse effect on the vehicle. Therefore, in the cooling liquid formulations, compatibility should be strictly controlled, so that coolant can not produce damage to the vehicle coating, such as peeling, bubbling and fading and so on. Antifreeze has a set of qualified long-lasting excellent corrosion inhibitor, through a variety of reagents and metal to achieve a balance, protective film on the metal surface. Central Plains to the circulatory system and can be any corrosion products and the body stripped down to prevent it from continuing corrosion of the body. Test shows that qualified for the corrosion of metals than the antifreeze water is 50 to 100 times. (2) anti-cavitation function. Cavitation is a kind of corrosion, corrosion of the principle that it is caused by numerous air bubbles against the metal. Cavitation devastating in the engine, there are two main locations of cavitation, one is outside the cylinder, the cylinder and the coolant contact surface; the other is on the pump circulating water pump. Some drivers in the use of a common antifreeze after bad,moncler doudoune, you will find on the cylinder had the same waves lapping as being uneven, water tanks have leaks, and this is cavitation. Cylinder liner cavitation will penetrate severe, resulting in antifreeze into the combustion chamber, this high-power engine is particularly prominent. If you open the pump that there are many pits on the pump, which is the phenomenon of cavitation. Cavitation is the enemy of the cooling system, a high-quality antifreeze must have excellent anti-cavitation ability to extend the life of the engine. (3) high boiling point functions. Driver in the operation of the most annoying thing is boil water tanks, some drivers still are therefore burns. A high quality antifreeze should have a good anti-boil performance, which requires it has a high boiling point. 2o century in 50 to 60 years, the main raw material antifreeze is alcohol, the boiling point of only 80clC. Boiling water tank so often cause the vehicle not running. Are generally greater than the boiling point of antifreeze 105 ��. So hard to qualified antifreeze than water boil, if you use antifreeze boil, carefully check to mechanical problems, such as water pumps are working properly, the thermostat is sensitive and so on. (4) does not have a scale, can not afford to bubble. Scale of the cooling effect of the engine cooling system a great influence in the tank have a scale, will affect the radiator's cooling effect, leading to rising water temperatures boil. Tests showed that the scale of the thermal conductivity is much less than cast iron, even more backward than aluminum. Therefore,moncler outlet, coolant at work, should not have a scale. If the engine coolant bubble will not only reduce the heat transfer, increased cavitation, while the coolant overflow will result in the loss. Scaling because the water tank usually contains calcium and magnesium ions, water, heating the gas after the reaction of calcium carbonate precipitation occurs, is the scale. And quality antifreeze with distilled water (deionized water), and add a scale control additives, has largely removed the calcium, magnesium and other metal ions, generally do not have scaling problems. Even if a small number of ions, without the formation of precipitation in the past has antifreeze chemicals combine to form water-soluble substances, and will not form scale. Antifreeze in the summer many drivers will let go to join the tap water, tap water has many minerals, evaporation in the heating,ugg stiefel, these minerals form a scale deposited on the metal surface. As with the kettle boiling water, you can find that bottle will slowly form a layer of inner scale,tory burch outlet, the engine cooling system inside and the same. After the formation of scale, so that adverse thermal effects. It is against the cylinder wall. After the formation of carbon fouling, due to combustion heat can not be passed in time antifreeze, so that cylinder temperature, cylinder liner and piston parts to adjust the gap properly, resulting in abrasions gas ring and cylinder liner wear, the piston will be serious stuck, the engine has fatal damage. (5) antifreeze function. Antifreeze with antifreeze function is a matter of course,tory burch reva, the freezing point of antifreeze can be adjusted, which is at different places, different temperature determined the freezing point of antifreeze today generally between a 1568 ��. 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