Standards for TVAC testing:

ESA Thermal vacuum outgassing test for the screening of space materials


Standard for Spacecraft Materials


...Acceptance criteria as follows:
(1) ≤0.1 percent collected volatile condensable materials (CVCM).
(2) ≤1.0 percent total mass loss (TML) less water vapor recovery (WVR), except that
a higher mass loss is permitted if this mass loss has no effect on the functionality
of the material itself and no effect on the functionality of any materials,
components, or systems that could be adversely affected by the subject mass loss.
Many materials contain absorbed water, but the loss of absorbed water does not normally affect
functionality; so the WVR (a measure of the total water vapor lost in the ASTM E595-15 test) is
subtracted from the TML.
... [for] surfaces with optical properties. The approach taken depends on the specific program needs but may include
lowering the CVCM requirement to ≤0.01 percent CVCM, use of optical surfaces in testing to
characterize the effects of deposition, or measurement of outgassing deposition rates as
functions of source and target temperature 

Test data for materials:

NASA outgassing data: (backup copy of table):

ESA Materials database (not maintained):

Space Materials Database:

Other resources

The LIGO Vacuum Compatible Materials List

Materials in Vacuum FAQThe Kurt J. Lesker Company’s TechInfo Department.

Thermal Vacuum Topic Small Satellite Reliability Initiative (SSRI) Knowledge Base.

Finckenor, Miria M. 2016. “Materials for Spacecraft. Chapter 6.”

Dunn, Barrie D. 2016. Materials and Processes: For Spacecraft and High Reliability Applications.

Pereira, A. M., G. Pimenta, and B. D. Dunn. 2008. “Assessment of Chemical Conversion Coatings for the Protection of Aluminium Alloys.” ESA Scientific & Technical Memoranda 276. “Pereira et al. - 2008 - Assessment of Chemical Conversion Coatings for the.Pdf.” n.d. Accessed January 19, 2018.

Cleaning parts: