What are the common additives for industrial oils?
- 2018-09-29-

Shanghai Zhuoli Luluene Co., Ltd. industrial oil additives mainly include extreme pressure additives, detergents, dispersants, foam inhibitors, anti-corrosion rust inhibitors, flow point improvers, viscosity index improvers, etc.

The additives sold in the market are generally composites of the above single additives, the difference being that the composition of the single additive is different and the ratio of several single additives inside the composite additive is different.

Industrial oil ——Anti - wear agent

It refers to the ability of industrial oil to form a film on the friction surface under light and medium load conditions to prevent wear. Such as: sulfurized fats, phosphates, metal dithiophosphates.

Industrial oil - extreme pressure agent

It refers to the ability of industrial oil to prevent sintering and scratching of the friction surface under the conditions of low speed high load or high speed impact load friction, that is, under so-called extreme pressure conditions.

Extreme pressure agent contains sulfur phosphorus Active substances such as chlorine, the extreme pressure agent chemically reacts with the metal on the friction surface to form a compound having a lower shear force and a lower melting point than the original metal, forming an extremely pressure solid lubricating film to prevent sintering. Commonly used extreme pressure agents such as: sulfurized lard, phosphate, nitride, chlorinated paraffin.

Industrial oil ——Antifoaming agent

Industrial oils are often affected by shocks, agitation, etc., so that air enters the lubricating oil, so that the formation of bubbles will affect the lubricating properties of the lubricating oil, accelerate the oxidation rate, cause oil loss, and hinder the oil. The transmission causes the oil supply to be interrupted, hinders lubrication, and affects the transmission of pressure to the hydraulic oil.

The antifoaming effect is mainly to suppress the generation of foam and to increase the speed of eliminating the foam so as not to form a stable foam. It can adsorb on the foam and form a film that is unstable, thus achieving the purpose of destroying the foam. A commonly used antifoaming agent is a methyl silicone oil antifoaming agent.

Industrial oil ——Antioxidant

An important additive to prevent oil aging, which can effectively improve the service life of oil. Also talk about the solid additives commonly used in the market.

There are many additives in the market that claim to improve the oil protection function, and different brands promote their functions with different mechanisms of action. Here are a few simple types:

Graphite, molybdenum disulfide solid suspension type Mainly used for anti-friction and anti-wear, but can only be applied to solid lubrication and low-speed and high-load equipment. When the engine revolution exceeds 1000r/min , they have no effect.

In addition, its state in the lubricating oil is unstable, and precipitation occurs under a certain time and temperature conditions. The precipitates cause blockage of the oil circuit and accelerate the formation of sludge.

Teflon resin particle type As an anti-wear agent, it has been widely used in the United States, but it is deposited in the oil passage and the oil pump filter at low temperatures, causing clogging, and it is deactivated in the piston ring groove and accelerates the formation of sludge. Less recommended.

Coating film containing heavy metal particles such as copper and lead It can form a metal film on the friction surface, which acts as anti-wear and anti-extreme pressure. However, it is necessary to use an oil filter with a slightly larger filter element aperture, otherwise it will be filtered out to block the oil pump and oil circuit. In addition, the use of it for a long time will form a film on the surface of the piston and the cylinder body, causing the two to bond, and the phenomenon of sticking loops is likely to occur.

Magnetic oil It is a surface metal magnetizer, mainly used for anti-friction and anti-wear. The effective time of such products is too short, need to be added continuously, the cost is high, and it will interfere with the normal operation of the electronic components on the car.

The chlorine-containing " chlorine " is a good extreme pressure agent, but it is not suitable for the high temperature and high speed working environment of the engine, and it will produce acid under suitable conditions, posing a potential danger to the metal in the engine. In addition, chlorine additives may be associated with existing additives in industrial oils , causing other side effects.