When load capacity is the primary performance requirement — deep drawing, heavy forming, gear EP — the weld point on a 4-Ball EP test is the defining metric. Formulators replacing chlorinated paraffins need an alternative that can match or exceed 800 kgf weld points without introducing chlorine, heavy metals, or restricted sulfur compounds.
How Amine Phosphate EP Additives Work
Amine phosphate chemistry provides extreme pressure performance through a tribochemical film-forming mechanism. Under high contact pressure and temperature at the asperity level, the amine phosphate reacts with the metal surface to form a protective iron phosphate layer that prevents adhesive wear and welding. Unlike sulfur-based EP additives (which can corrode copper alloys) or chlorine-based packages (which generate corrosive byproducts), amine phosphates are mild, non-corrosive, and compatible with a broad range of metals and base fluids.
Desilube 77 Performance Profile
- 4-Ball EP weld point: > 800 kgf
- Base oil compatibility: Soluble in Group I, II, III, IV base oils; selective Group V compatibility
- Water compatibility: Emulsifiable for water-dilutable metalworking fluid systems
- Metal compatibility: Non-corrosive to ferrous and non-ferrous metals
- Treat rate: 2–15% by weight; active at lower concentrations than chlorinated paraffin equivalents
- Applications: Drawing oils, deep drawing, tube and wire drawing, gear oils, hammer oils, industrial greases
Synergy with Solid Lubricants
Desilube 77 is frequently used in combination with MoS₂ solid lubricant dispersions in heavy-duty forming and drawing lubricants. The amine phosphate provides chemical EP activity at high loads, while MoS₂ provides lamellar film lubrication that reduces friction and tool wear throughout the contact zone. The combination allows lower treat rates of both components while exceeding the performance of either alone.
Desilube also offers NSF HX1-certified EP/AW alternatives (Desilube 88, 98F) where food-safe metalworking fluid performance is required alongside chlorinated-paraffin replacement.
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