Lube
Petro Chemicals 2025-03-02
Definition & Function
Lubricants are substances designed to reduce friction and minimize wear between interacting surfaces.
- Primary Roles:
- Friction reduction
- Heat dissipation
- Corrosion prevention
- Contaminant removal
Classification by Base Material
| Type |
Composition |
Temperature Range |
Example Applications |
| Mineral Oil |
Refined petroleum hydrocarbons |
-20°C to 120°C |
Engine oils, gear oils |
| Synthetic Oil |
PAO, esters, silicones |
-50°C to 300°C+ |
Jet engines, high-performance motors |
| Grease |
Oil + thickener (Li/Ca soap) |
-30°C to 150°C |
Bearings, chassis components |
| Solid Lube |
Graphite, MoS₂, PTFE |
Up to 350°C |
High-load, dry environments |
Key Properties
| Property |
Test Method |
Industrial Relevance |
| Viscosity |
ASTM D445 (Kinematic) |
Determines flow and film strength |
| Viscosity Index |
ASTM D2270 |
Temperature stability rating |
| Flash Point |
ASTM D92 |
Safety during storage/use |
| Pour Point |
ASTM D97 |
Low-temperature performance |
Additives & Enhancements
| Additive |
Function |
Example Compound |
| Anti-wear (AW) |
Forms protective films |
Zinc dialkyldithiophosphate (ZDDP) |
| Detergent |
Prevents sludge buildup |
Calcium sulfonates |
| Anti-oxidant |
Extends oil life |
Hindered phenols |
| Friction Modifier |
Reduces stick-slip |
Molybdenum disulfide (MoS₂) |
Application-Specific Selection
| Application |
Recommended Lube |
Key Requirement |
| Engine Oils |
Synthetic 5W-30 |
High VI, shear stability |
| Industrial Gear |
EP (Extreme Pressure) grease |
Load-bearing additives |
| Food Machinery |
NSF H1-certified oil |
Non-toxic, incidental contact |
| Aerospace |
Perfluoropolyether (PFPE) |
Wide temp range (-70°C to 320°C) |
Disclaimer: The above content is for reference and communication only among industry insiders, and does not guarantee its accuracy or completeness. According to relevant laws and regulations and the regulations of this website, units or individuals who purchase related items should obtain valid qualifications and qualification conditions.
