1, the role of function
Antifreeze to prevent freezing, to prevent the cylinder, only the most basic function of the cracking radiator antifreeze, antifreeze there are other important functions, such as anti-boil, anti-scale and anti-corrosion. Summer use of antifreeze can effectively prevent the tank, “boil”, year-round use of antifreeze prevent furring cooling system, inhibit corrosion of various metals. Drivers usually ignore friends “scale” the harm, in fact, the scale of damage to the car is quite large, the thermal conductivity of the scale is very small, 1/25 is cast iron, brass 1/50. Once you have the scale thermal conductivity of the coolant is greatly reduced, the engine temperature increases, corrosion increase, which in turn prompted scale increase, creating a vicious cycle, the scale may clog cooling pipe system, causing more accidents, according to the domestic information It reported that the maintenance of normal use of the automobile engine, six percentage engine cooling system failure, the failure is mainly due to scale and corrosion of metal parts, metal corrosion and scale shows parts of the engine cooling system how much harm, so year-round use good quality antifreeze can not only effectively protect the vehicle cooling system, but also effectively save money.
According to the survey, the global automotive engine failure more than 50% comes from the cooling system! This shows the importance of reasonable matching antifreeze. At present, most antifreeze sold on the market is based on ethylene glycol as the main raw material products, then add the right amount of organic or inorganic salts to achieve corrosion preventive effect.
2 merits description
Antifreeze measure of the merits of antifreeze are the following points: First, the effect of antifreeze, water freezes at 0 deg.] C, ordinary type antifreeze can reach -40 deg.] C, and quality antifreeze should reach about -60 deg.] C, which is an important indicator of the quality of the calibration antifreeze; other antifreeze boiling, the boiling point of water is 100 deg.] C, the antifreeze liquid should reach at least 108 deg.] C, that is, the lower the freezing point, the higher the boiling point, the greater the temperature difference which, relatively speaking, the better the quality of antifreeze.
Of course,These two indicators to measure only one aspect, corrosion preventive antifreeze properties are also extremely important, because a long time corrosion metal member generating a large amount of rust, severe corrosion will gradually wear and cause leakage of the metal plate, which is directly related to the life of the vehicle cooling system, the most common antifreeze essentially by adding an organic or inorganic salt to solve this problem, the high point and low consumption antifreeze has been used for production of chemical reaction technique, comprising a stable ASEC salt (phosphate-free), and through a rigorous hot surface aluminum corrosion test ASTMD 4340, it can control the amount of precipitate in hard water, and to provide excellent corrosion protection to the cooling system, which is different from the existing market type sold by conventional glycol-based antifreeze. Can be said to have been completely out of the traditional production process antifreeze, antifreeze is a new technology, and meet the latest US 6580 standard. Its advantages are: anti-coagulation, overheating, rust and corrosion protection of all metal surfaces of the refrigeration system, including aluminum parts. Without damaging the radiator hoses, gaskets and other rubber components, while also preventing excessive foam, the hardness of the water to prevent calcium and magnesium precipitation caused, thereby avoiding the formation of hot spots at the end portions and the plugging portion. And heavy duty diesel engine can be used without having to purchase additional cooling additives (the SCA), compatible with ethylene glycol antifreeze and all grades of auxiliary additives, it can also be used for various types of water-cooled bus all free aluminum or aluminum parts, small cars and heavy the cooling system of the vehicle.
Antifreeze Another point is that the anti-fouling properties. According to the survey, more than 70 percentage automotive cooling system gave birth to scale and rust, seriously affecting the cooling system cooling function up! Most owners believe that antifreeze should be used during the winter, other seasons you can use tap water, in fact, this is a misunderstanding. We know that hard water containing a large amount of a basic substance, was separated into the scale after heating, the metal adhered to the surface within the heat sink, if not clean up its regular thick layer of scale will seriously affect the cooling system the function, leading to boil, water shortages, and even stick cylinder, bush-burning. Therefore, we should first tank of scale and rust spots cleaned before replacing antifreeze. Water tank clean-up agents to choose double-effect one of the cleaning rust cleaning agent is better, now has two products on the market, one is the early products, in addition to the removal of scale without any other function, while the other is more advanced high-end products,Of course, the high-grade referred to here is not the price, there are a lot of very good new products in the very reasonable price, is the higher cost of multi-function products, with the exception cleanup scale, rust function, but also lubrication and protection of the cooling system, because in the antifreeze circulation in the cooling system, the lubrication of these protective agents will be attached to the metal surface, forming a protective film, the material is completely isolated from the outside water, the cooling system to prevent the internal node and again green scale internal corrosion of metal parts cooling system. After a good clean-water tank, then add antifreeze effect is better. Antifreeze should be replaced every two years under normal circumstances once, because the indicators have reached less than two years after the antifreeze original care requirements, it should be replaced, do not be busy working in order to save a little money or the bear false replacement time, allowing you more harm than good.
3, the replacement cycle
1. Some owners should select good quality antifreeze, antifreeze these relatively long period, mostly to 2 – 3 years, and confirm that the product is valid when adding within;.
2 is not less than the case where antifreeze tick generally recommended every two years or 40,000 km with replacement.
4, well-known brand
Finally, we also need to remind you, has certified the world’s authoritative testing organizations is also important. Currently, more authoritative testing standards are: light vehicle aluminum block engine test standard ASTM D3306 and heavy-duty vehicle engine type cast iron wet cylinder test standard ASTM D4985. Previously, respectively, two different types of standard antifreeze compatibility is not strong, easily gumming silicate material in the composition, clogging of the cooling system, reduces the transmission efficiency of the circulating liquid; In addition, since phosphate easy formation of scale and rust in hard water, it has been gradually substituted by new generation of products. Currently on the market the latest high-quality antifreeze should also meet the ASTM standard D3306 and D4985 two, and to comply with US material experimentsSociety hot surface aluminum corrosion test standard D4340, SAE J1034 and J1941 standards of automobile manufacturers and national recognition.
5, Storage Precautions
stored in a dry, cool place, sun exposure is prohibited;
6, purchase Notes
antifreeze (antifreeze coolant) purchase Notes
1, antifreeze usually two years or every 60,000 km travel is changed once a maintenance cycle between different models may differ slightly.
2, because various models, the amount of antifreeze are not the same, you can query a specific car maintenance manuals.
3, color: the same must be replaced with the original car color antifreeze, such as the original car is green, only the green replacement.
Now antifreeze on the market there are many colors, you must have heard the advice of professional technicians, “XX must use color antifreeze.” This is mainly due to the different brands, different formula system; and the same brand of different freezing point of the product, formula system may vary. If the mix, (such as various inorganic components) may occur between the different chemical composition adverse chemical reaction, resulting in failure or mechanical failure antifreeze. To this end, the brands have adopted the method of adding color to identify, which is why the market will have a variety of colors antifreeze products.
4, freezing point: selecting a low freezing point antifreeze products, basic indicators antifreeze freezing point and boiling point. In the winter season should choose to use antifreeze low freezing point, the lower the freezing point, the stronger the antifreeze frost resistance. Typically, the choice of freezing point of antifreeze should generally be lower than the minimum temperature above 10 ℃, to prepare mutated weather.
5, different brands of antifreeze products can not be mixed, prior to replacement of other brands, the tank should be cleaned.
6, some owners prefer tap water directly added to tap water in the summer or diluted antifreeze in the winter, it is veryBad behavior! Tap water minerals will corrode the tank components and produce a large scale precipitation, eventually causing serious harm.
7. Further, if the poor antifreeze selected, the same system components may corrode tanks, leading to tank leakage, pipe blockage, rapid warming and other conditions of the vehicle and eventually lead to operational failure or an accident.
boil water tank summer or winter freeze tanks ruptured, the vehicle is a common seasonal problem, select the correct antifreeze temperature range can effectively avoid these problems, but if you choose properly, it will cause the opposite effect.