THE COMPATIBILITY OF VARIOUS METALS WITH LIQUID FLUORINE
Abstract
This report covers studies of liquid F and its contaminants, reactions on metal surfaces, fluoride films, and immersion tests of tensile specimens. A method of preparing contaminant free F and its IR analysis is discussed. No liquid phase reaction between F and metals was observed but gas phase reaction occurs during warmup. Small weight changes in metal specimens immersed in liquid F for 15 and 75 minutes were noted. Exposure of hydrocarbon films on metals to F2 leaves carbon deposits while exposure to ClF3 or ClF3 + F2 leaves fluorocarbon films. No detectable F films formed on Al specimens using electron diffraction techniques. At low temperatures gaseous F formed films of less than 200 Angstroms on metal powders with initially rapid film formation tapering off to a negligible rate after one day. Metal powders absorb gaseous fluorine at -279 F. Metal tensile specimens exposed to liquid F for one year corroded less than one mil. These specimens had essentially the same tensile properties as similar ones exposed to liquid N.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1962
- Accession Number
- AD0423551
Entities
People
- James F. Tompkins
- Sidney Kleinberg