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Effects of hydraulic fluid CVCM on silver-TeflonChanges in the solar absorptance of silver-Teflon (Ag/FEP) surfaces were measured after contamination by the outgassing products of hydraulic fluid and irradiation by solar simulators. Although radiator surfaces are selected for stability to the solar ultraviolet and particulate environment, contaminant deposition and their interaction with solar exposure can degrade their performance. The test procedure to deposit the hydraulic fluid collected volatile condensible material (CVCM), irradiate, and determine solar absorptance changes by reflectance measurements using a spectrophotometer and a solar simulator is described. The tests showed that for the estimated deposition rates on the Ag/FEP, the hydraulic fluid CVCM fraction remaining under normal conditions (above -40 C) would not degrade its performance. The residual CVCM can be easily removed from Ag/FEP by wiping with a solvent saturated flannel. The changes in solar absorptance with the CVCM film thickness and the radiation exposure duration are reported, concluding that vacuum ultraviolet radiation did not prevent easy removal of CVCM.
Document ID
19790059267
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Muscari, J. A.
(Martin Marietta Aerospace Denver, Colo., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Subject Category
Spacecraft Design, Testing And Performance
Meeting Information
Meeting: The enigma of the eighties: Environment, economics, energy; Twenty-fourth National Symposium and Exhibition
Location: San Francisco, CA
Start Date: May 8, 1979
End Date: May 10, 1979
Accession Number
79A43280
Funding Number(s)
CONTRACT_GRANT: NAS9-15436
Distribution Limits
Public
Copyright
Other

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