What kinds of lubricating oil additives are there?

Net dispersant

Detergent dispersants include detergents and dispersants. Mainly used for internal combustion engine oil (gasoline engine oil, diesel engine oil, railway diesel locomotive oil, two-stroke gasoline engine oil, marine engine oil). Its main function is to keep the engine clean, so that the generated insoluble matter is colloidal suspended and will not further form carbon deposit, paint film or sludge. Specifically, its function can be divided into four aspects: acid neutralization, solubilization, dispersion and washing.

2

Oxygen preservative

Anti-oxidation and anti-corrosion agents can inhibit the oxidation of oil products, which are mainly used in industrial lubricants, internal combustion engine oil and process oil.

three

metallic passivator

Metal passivator is an antioxidant, which has no antioxidant effect, but indirectly "passivates" metal activity, inhibits the catalytic effect of metals and their compounds on oil oxidation, reduces oil deterioration and prolongs the service life of oil.

four

4, the backlog of anti-wear agents

Cumulative antiwear agent refers to an additive that can form a high melting point chemical reaction film with metal surface under the condition of high temperature and high pressure boundary lubrication to prevent melting, adhesion and scratch. Its function is that its decomposition products react with metal at high friction temperature to generate compounds with lower shear stress and melting point than pure metal, thus preventing contact surface from welding and effectively protecting metal surface. Extreme pressure film corrosion inhibitor is mainly used in industrial gear oil, hydraulic oil, guide rail oil, cutting oil and other oil products with extreme pressure requirements to improve the extreme pressure and wear resistance of oil products.

five

Oiliness agent and friction modifier

All additives that can increase oil film strength, reduce friction coefficient, improve wear resistance and reduce friction and wear between moving parts are called oiliness agents.

six

viscosity index improver

Viscosity index improvers are all oil-soluble chain polymers with relative molecular mass of tens of thousands to millions. When they are dissolved in lubricating oil, they exist in the form of coils at low temperature, which has little effect on the viscosity of lubricating oil. With the increase of lubricating oil temperature, the coil is stretched, the effective volume increases, and the flow resistance of lubricating oil increases, resulting in a relatively significant increase in the viscosity of lubricating oil. Viscosity index improvers have different forms at different temperatures and have different effects on viscosity, which can increase viscosity and improve viscosity-temperature performance. Viscosity index improvers are mainly used to improve viscosity index, viscosity-temperature performance and viscosity of lubricating oil. It can be used to prepare thickened oil, so that the prepared oil has excellent viscosity-temperature performance, good low-temperature startability, low oil consumption and certain anti-wear effect.

seven

rust inhibitor

The function of preservative is to form a firm adsorption film on the metal surface to inhibit oxygen and water, especially whoever touches the metal surface will not rust.

eight

Pour point depressant

When the temperature of oil drops to a certain extent, it will lose its fluidity and solidify. The main function of pour point depressant is to lower the freezing point of oil and ensure that oil can flow at low temperature.

nine

defoamer

Oil products such as hydraulic oil and compressor oil may encounter frequent start-stop conditions, and the circulating systems such as internal combustion engine oil and gear box oil are stirred violently, which often produces a lot of foam, resulting in energy transfer and oil supply failure. There are many defoaming methods, which can be divided into physical and mechanical defoaming and chemical defoaming.