SPI Vacuum Greases
Advantages of being halogen-free
If halogens are present, in the presence of radiation, molecules containing Fl,
Cl, or Br can be evolved from the lubricant. Since these gases tend to be
corrosive and highly reactive, damage to sensitive equipment or instrumentation
could occur.
Additionally, at high temperatures, instead of the grease just volatilizing away,
the above mentioned halogen compounds are released. Pure hydrocarbon greases,
however, just evaporate "cleanly" without leaving so much of a residue.
On the other hand, halogens, especially perfluorinated polyether oils and also,
PTFE additives can enhance certain properties of a grease. So one must consider
the total situation but if such property enhancements are not important, then a
lubricant free of halogens might be more advantageous.
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