The foam produced in lubricating oil will have a great effect on the effect of use. A large number of stable foam, will lead to increased volume of lubricants, easy to make oil from the oil tank overflow, while increasing the compressibility of lubricants, so that the oil pressure reduced. Because of this, industrial lubricants in the production of the use of anti-foaming agent.
The main role of the anti-foaming agent is to inhibit the production of oil bubbles and to rupture the foam. The bubble will affect the lubricant evenly along the oil pipeline to the entire lubrication surface, damage to the normal work of lubricating oil, especially in the hydraulic system, the oil supply is hindered will bring very serious consequences, therefore, the use of lubricants under these conditions, the need to add an additive, is not easy to blister oil, even if it has been foaming, can also disappear in a very short time.
Anti-foaming agents are usually insoluble in oil, and are highly dispersed colloidal ions present in the presence of oil. Dispersed anti-foaming agent particles can be adsorbed on the foam, then invade the foam, become a part of the bubble, and then expand on the film. With the smaller expansion of the inhibitor, the membrane becomes thinner and the final rupture is achieved to break the membrane.