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Additive Definition

Substances added together with base oils to enhance or supplement the performance of lubricants

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Type and function

Type and function
Additive Main function
Viscosity Index
Minimizing viscosity change with temperature of lubricant
Dispersant Suppression and acid neutralization of soot, sludge and varnish deposits produced during combustion
Freshener Acid neutralization, rust prevention and suppression of piston lacquer, carbon and varnish deposits Prevents piston ring sticking under high temperature operating conditions
Antioxidant Prevents the formation of corrosive acids or sludges produced by oxidation Extend the service life of lubricant
Rust preventive Suppresses the occurrence of rust caused by the action of oxygen and water
Abrasion resistant Wear protection on metal surfaces
Antifoam Control surface tension to change bubbles
Friction reducing
Lower friction coefficient contributes to reduced friction and improved fuel economy
Pour point
Lower lubricating oil improves low temperature performance
(flows well at low temperatures)
  • 1. Viscosity Index Improver, Viscosity Modifier

    As an additive used to improve viscosity index (stability of viscosity change of oil by temperature change) by reducing viscosity change with temperature, oil-soluble high molecular weight compound of about 10,000 ~ 1,500,000 is usually used. The polymer material aggregates at low temperature and swells at high temperature, and uses it to adjust the viscosity to improve the viscosity index.
    Type: Polymethacrylate (PMA), Polyisobutylene, Olefin Copolymer, etc.

  • 2. Diersant

    t is in the form of colloidal, dispersing sludge produced in relatively low temperature operation conditions in oil, and dispersing soot and other small insoluble particles in oil evenly to prevent formation and acid neutralization of sludge deposits.
    That is, it disperses incomplete combustion and blocks the formation of sludge.
    Type: Polyisobutenyl Succinimides, Polyisobutenyl Esters, etc.

  • 3. Detergent

    When lubricating oil is used under high temperature, incomplete combustion of fuel and lubricating oil produces deterioration, etc. Cleaner prevents and suppresses deposition of deterioration and neutralizes acidic substances. This prevents corrosion of metal surfaces, seizure and rust of piston rings, and prevents the formation of lacquers, varnishes and deposits.
    Type: Metal sulfonates (Neutral & Overbased), Metal Alkyl phenates, etc.

  • 4. Anti-Oxidant

    Lubricants react with oxygen in the air to oxidize. Factors that promote this include operating temperatures, ambient conditions, and catalysts. Antioxidants prolong the service life of lubricants by preventing the formation of corrosive acids or sludges produced by oxidation.
    Type: Phenol Type, Amine Type, Zinc dialkyldithiophosphate (ZnDDP)

  • 5. Corrosion Inhibitor

    It suppresses the occurrence of rust caused by oxygen and water.
    In order to prevent rust, sufficient adsorption to metal and solubility in oil are required. Therefore, strong polar group and moderate size lipophilic group (hydrocarbon group) should be provided.
    종류 : Ethoxylated alkyl phenols or neutral detergent substrate salts, Alkenyl succinicacids and amine phosphates, Overbased substrates and amino compounds 등
    Type: Ethoxylated alkyl phenols or neutral detergent substrate salts, Alkenyl succinicacids and amine phosphates, Overbased substrates and amino compounds, etc.

  • 6. Anti-wear agent

    It is an additive used to prevent wear of equipment by creating a solid lubricating film by adsorption of organic polar compound on metal surface and reaction with metal surface.
    Type: Organic sulfur and chlorine compound, Organic Phosphate Esters, ZDDP, etc.

  • 7. Antifoamer Agent

    It is used to prevent bubbles generated in lubricating oil, and it uses bubbles of lower surface tension than oil such as silicon to change the surface tension on the surface of the bubble, causing the bubbles to break.
    Type: Silicon series, etc.

  • 8. Friction Modifier

    It is a additive that improves lubrication performance by giving low coefficient of friction when sliding between metals. It can improve fuel economy through friction reducing agent.
    Type: Long Chain Alkyl Ester, Amine, Acid, etc.

  • 9. Pour Point Depressant

    It is an additive that lowers the pour point (the lowest temperature at which oil can flow) .It is adsorbed by Wax when Wax is produced at low temperature and prevents Wax from agglomeration.
    Type: Polymethacrylate (PMA), Polyacrylamide, etc.

Additive application

The additives used vary depending on the lubricating oil product line, and additives are used to suit the characteristics / environment of each product line

Additive application
Antiwear agent
Rust inhibitor
Friction modifier
Extreme pressure agent
Antifoam agent
Viscosity modifier
Pour point depressant
Seal swell agent