Pour Point Depressants | Low-temperature machinery lubrication | Purity: 95% (ISO 208) ▲98% (GB/T 1885) ▲100% (ASTM D-XXX) Pour Point Depression: -20°C (ASTM D97) ▲-25°C (GB/T 3535) ▲-30°C (ISO 3016) | Ensures consistent performance in extreme cold; meets GB standards | Higher cost for advanced purity; requires proper storage for volatile additives |
Viscosity Modifiers | Heavy machinery in fluctuating temps | Viscosity Index: 120 (ISO 3104) ▲140 (GB/T 265) ▲160 (ASTM D2270) Shear Stability: 10% loss (ASTM D5169) ▲5% loss (GB/T 11137) | Broad temperature adaptability; reduces friction in varied conditions | Potential shear degradation over time in high-torque environments |
Anti-Oxidants | High-heat engine oils | Oxidation Inhibition: 800h at 150°C (ASTM D2241) ▲1000h (GB/T 7329) ▲1200h (ASTM D943) | Extends oil lifespan in engines; prevents sludge formation | May darken oil over time; requires precise dosing to avoid over-stabilization |
Corrosion Inhibitors | Marine/chemical equipment | Corrosion Resistance: 2mm loss (ASTM D665) ▲1mm loss (GB/T 11143) ▲0.5mm loss (ISO 12206) | Protects metal surfaces in humid/corrosive environments (e.g., steel barrels) | May interact with other additives; less effective in extreme acid/alkali conditions |
Anti-Wear Agents | High-load gearboxes | Wear Reduction: 30% (ASTM D5182) ▲35% (GB/T 269) ▲40% (ISO 12156-1) Friction Coefficient: 0.15 (ASTM D2714) ▲0.12 (GB/T 3142) | Reduces metal-on-metal wear; extends equipment lifespan | Can increase oil viscosity; may require compatibility checks with base oils |
Thermal Stabilizers | Industrial turbines/engines | Thermal Stability: 300h at 200°C (ASTM D5290) ▲400h (GB/T 3536) ▲500h (ISO 12156-1) Volatility: 10% evaporation (ASTM D86) ▲5% (GB/T 6536) | Maintains oil properties under prolonged high heat; prevents volatility loss | Limited effectiveness in extreme thermal shock scenarios; costly for advanced grades |