INVESTIGATION OF THE EFFECTS OF FLUORIDE ON CRYOPANEL MATERIALS FOR SPACE CHAMBER PROPULSION TESTS

Abstract

The extent of corrosion by fluorine on several cryopanel materials was evaluated for conditions approximating those which might be expected in a space simulation chamber during rocket engine tests. Four torr of fluorine gas pressure was applied at room temperature; and specimen temperatures were cycled between ambient and 77K. The chamber was periodically pumped to high vacuums. The total exposure time exceeded 1000 hr. Type 304L stainless steel, phosphorus deoxidized copper, and 1100 aluminum were tested. Some specimens were welded, and some were tested with an applied bending stress. No pitting or other microstructural corrosion was detected, but noticeable changes occurred in the surface appearance, especially with aluminum and copper.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1968
Accession Number
AD0675305

Entities

People

  • D. M. Trayer
  • P. G. Waldrep

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Bending Stress
  • Chemistry
  • Composite Materials
  • Corrosion
  • Diffraction
  • Electron Probes
  • Fluorine
  • Materials
  • Optical Properties
  • Pressure Transducers
  • Rocket Engines
  • Stress Corrosion
  • Test Equipment
  • Vacuum
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Combustion and Flow Dynamics.
  • Metallurgy
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster