Why does car antifreeze foam? How to solve?
August 30, 2022
During the operation of the vehicle, the vibration of the body and the like will cause the air to be mixed into the antifreeze liquid, thereby generating foam. The air dissolved in the antifreeze liquid has an oxidation effect on ethylene glycol, and the wall of the foam attachment will aggravate the pitting corrosion, affecting the Heat Conduction. If these bubbles are not dealt with in time, they will cause a lot of damage. At this time, not only will the product quality be affected, but the production schedule will also be affected.
What Causes Antifreeze in Car Engines to Foam? The water channel is too dirty/whether the water tank or piping system is leaking/is the water pump broken/air is not discharged/is there any impurities in the water tank pipeline/is the cylinder gasket flushed, whether water or other products have been added before/the seal on the oil radiator The ring is broken, and the oil will foam white when it encounters antifreeze. Auto repair shops often encounter this problem! It is normal to exclude a moderate amount of foam when using antifreeze above. One of the standards for antifreeze coolant is "foam tendency". The indicator requirements are: the foam volume is not more than 150ml, and the foam disappearance time is not more than 5 seconds. It can be seen from this that it is normal to have a moderate amount of foam when using antifreeze. In addition, it is often reported that foam occurs at low temperatures. This basically happens just a few hours after switching to a new antifreeze. This is because the water tank was not thoroughly cleaned when the new antifreeze was replaced, and a lot of scale remained in the water tank, while the new antifreeze has a descaling function, and the additive reacts with the scale to dissolve the scale and generate carbon dioxide gas at the same time. The gas rose, causing a lot of air bubbles to emerge from the tank cap. In this case, it is recommended that after running for a few days, all are excluded, and new antifreeze can be added to solve the problem. . Foam may also directly affect the cooling effect, and antifreeze without antifreeze defoamer will cause serious damage to the water pipe due to too much pressure and high temperature. The addition amount of defoamer is not high, generally recommended addition amount of 0.1%-1%, the addition amount needs to be tested. 1. Antifreeze is formed by certain chemical components. During the operation of the car, due to the bouncing and vibration of the car body, air will seep into the antifreeze, resulting in foam. 2. In the production process of antifreeze, due to the need to vibrate, add additives, stir, etc., it directly contacts with the gas in the air, resulting in a large amount of foam. The hazards of antifreeze foaming: 1. Antifreeze foam attached to the wall will aggravate corrosion, affect the heat conduction and heat dissipation of the automobile engine, and the service life of the cooling system 2. The foaming of the antifreeze will seriously affect the antifreeze effect of the antifreeze itself, resulting in poor user experience. . Antifreeze defoamer is made of special modified polyether and fluorine-containing raw materials through special process, easily soluble in water, especially suitable for high temperature, strong acid and strong alkali, high shear and high pressure conditions to continuously defoaming and suppress foam . It has good high temperature resistance, acid and alkali resistance; it can be widely used in various temperatures to eliminate foam in various harsh systems.
