| Krytox® GPL 220–227 anticorrosion greases are white greases that contain 2% sodium nitrite. These grades provide rust protection at ambient temperatures, corrosion protection at high temperatures, and antiwear protection. The grease additives may alter the chemical resistance of the grease. The standard grease consistency is NLGI grade 2 penetration (265–295). Softer or harder NLGI penetration grades can be made by special order. Special nonmelting silica thickeners are available for applications that are higher than the 325°C(617°F) melting point of the standard PTFE thickener. These greases are based on Krytox® GPL 100–107 oils - clear, colorless, fluorinated synthetic oils that are nonreactive, nonflammable, safe in chemical and oxygen service, and are long-lasting. Krytox® is a perfluoropolyether (PFPE)—also called perfluoro-alkylether (PFAE) or perfluoropolyalkylether (PFPAE). The polymer chain is completely saturated and contains only carbon, oxygen, and fluorine. On a weight basis, a typical Krytox® oil contains 21.6% carbon, 9.4% oxygen, and 69.0% fluorine. Information provided by DuPont Performance Lubricants. |
