ASTM E595-06

Standard Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in a Vacuum Environment

SCOPE
1.1 This test method covers a screening technique to determine volatile content of materials when exposed to a vacuum environment. Two parameters are measured: total mass loss (TML) and collected volatile condensable materials (CVCM). An additional parameter, the amount of water vapor regained (WVR), can also be obtained after completion of exposures and measurements required for TML and CVCM.
1.2 This test method describes the test apparatus and related operating procedures for evaluating the mass loss of materials being subjected to 125C at less than 7 103 Pa (5 105 torr) for 24 h. The overall mass loss can be classified into noncondensables and condensables. The latter are characterized herein as being capable of condensing on a collector at a temperature of 25C. Note 1Unless otherwise noted, the tolerance on 25 and 125C is 1C and on 23C is 2C. The tolerance on relative humidity is 5 %.
1.3 Many types of organic, polymeric, and inorganic materials can be tested. These include polymer potting compounds, foams, elastomers, films, tapes, insulations, shrink tubings, adhesives, coatings, fabrics, tie cords, and lubricants. The materials may be tested in the "as-received" condition or prepared for test by various curing specifications.
1.4 This test method is primarily a screening technique for materials and is not necessarily valid for computing actual contamination on a system or component because of differences in configuration, temperatures, and material processing.
1.5 The criteria used for the acceptance and rejection of materials shall be determined by the user and based upon specific component and system requirements. Historically, TML of 1.00 % and CVCM of 0.10 % have been used as screening levels for rejection of spacecraft materials.
1.6 The use of materials that are deemed acceptable in accordance with this test method does not ensure that the system or component will remain uncontaminated. Therefore, subsequent functional, developmental, and qualification tests should be used, as necessary, to ensure that the material's performance is satisfactory.
This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Oct-2006
• ICS: 23.160 - Vacuum technology
• Technical Committee: E21 - Space Simulation and Applications of Space Technology
• Drafting Committee: E21.05 - Contamination

Relations

• Replaces: ASTM E595-93(2003)e2 - Standard Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in a Vacuum Environment
• Effective Date: 01-Nov-2006
• Replaced By: ASTM E595-07 - Standard Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in a Vacuum Environment
• Effective Date: 01-Dec-2007
• Referred By: ASTM E1548-09(2022) - Standard Practice for Preparation of Aerospace Contamination Control Plans
• Effective Date: 01-Nov-2006
• Referred By: ASTM E2217-12(2019) - Standard Practice for Design and Construction of Aerospace Cleanrooms and Contamination Controlled Areas
• Effective Date: 01-Nov-2006
• Referred By: ASTM D6412/D6412M-99(2020) - Standard Specification for Epoxy (Flexible) Adhesive For Bonding Metallic And Nonmetallic Materials
• Effective Date: 01-Nov-2006
• Referred By: ASTM E2352-19 - Standard Practice for Aerospace Cleanrooms and Associated Controlled Environments—Cleanroom Operations
• Effective Date: 01-Nov-2006
• Referred By: ASTM D6411/D6411M-99(2020) - Standard Specification for Silicone Rubber Room Temperature Vulcanizing Low Outgassing Materials
• Effective Date: 01-Nov-2006
• Referred By: ASTM E1559-09(2022) - Standard Test Method for Contamination Outgassing Characteristics of Spacecraft Materials
• Effective Date: 01-Nov-2006
• Referred By: ASTM E2311-04(2021) - Standard Practice for QCM Measurement of Spacecraft Molecular Contamination in Space
• Effective Date: 01-Nov-2006
• Referred By: ASTM E1216-21 - Standard Practice for Sampling for Particulate Contamination by Tape Lift
• Effective Date: 01-Nov-2006
• Referred By: ASTM E2312-11(2019) - Standard Practice for Tests of Cleanroom Materials
• Effective Date: 01-Nov-2006
• Referred By: ASTM D4067-23 - Standard Classification System and Basis for Specification for Reinforced and Filled Poly(Phenylene Sulfide) (PPS) Injection Molding and Extrusion Materials Using ASTM Methods
• Effective Date: 01-Nov-2006
• Referred By: ASTM E1997-15(2021) - Standard Practice for the Selection of Spacecraft Materials
• Effective Date: 01-Nov-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E595–06
Standard Test Method for
Total Mass Loss and Collected Volatile Condensable
1
Materials from Outgassing in a Vacuum Environment
This standard is issued under the fixed designation E595; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope subsequent functional, developmental, and qualification tests
should be used, as necessary, to ensure that the material’s
1.1 This test method covers a screening technique to deter-
performance is satisfactory.
mine volatile content of materials when exposed to a vacuum
1.7 This standard does not purport to address all of the
environment. Two parameters are measured: total mass loss
safety concerns associated with its use. It is the responsibility
(TML) and collected volatile condensable materials (CVCM).
of the user of this standard to establish appropriate safety and
An additional parameter, the amount of water vapor regained
health practices and determine the applicability of regulatory
(WVR), can also be obtained after completion of exposures
limitations prior to use.
and measurements required for TML and CVCM.
1.2 Thistestmethoddescribesthetestapparatusandrelated
2. Referenced Documents
operating procedures for evaluating the mass loss of materials
2
−3 −5
2.1 ASTM Standards:
being subjected to 125°C at less than 7 310 Pa (5 310
E177 Practice for Use of the Terms Precision and Bias in
torr) for 24 h. The overall mass loss can be classified into
ASTM Test Methods
noncondensables and condensables. The latter are character-
2.2 ASTM Adjuncts:
ized herein as being capable of condensing on a collector at a
3
Micro VCM Detailed Drawings
temperature of 25°C.
NOTE 1—Unless otherwise noted, the tolerance on 25 and 125°C is 3. Terminology
61°C and on 23°C is 62°C.The tolerance on relative humidity is 65%.
3.1 Definitions:
1.3 Many types of organic, polymeric, and inorganic mate-
3.1.1 collected volatile condensable material, CVCM—the
rials can be tested. These include polymer potting compounds, quantity of outgassed matter from a test specimen that con-
foams, elastomers, films, tapes, insulations, shrink tubings, denses on a collector maintained at a specific constant tem-
adhesives, coatings, fabrics, tie cords, and lubricants. The
perature for a specified time. CVCM is expressed as a
materials may be tested in the “as-received” condition or percentage of the initial specimen mass and is calculated from
prepared for test by various curing specifications.
thecondensatemassdeterminedfromthedifferenceinmassof
1.4 This test method is primarily a screening technique for the collector plate before and after the test.
materials and is not necessarily valid for computing actual
3.1.2 total mass loss, TML—total mass of material out-
contamination on a system or component because of differ- gassed from a specimen that is maintained at a specified
ences in configuration, temperatures, and material processing.
constant temperature and operating pressure for a specified
1.5 The criteria used for the acceptance and rejection of time. TML is calculated from the mass of the specimen as
materials shall be determined by the user and based upon
measured before and after the test and is expressed as a
specific component and system requirements. Historically, percentage of the initial specimen mass.
TML of 1.00% and CVCM of 0.10% have been used as
3.1.3 water vapor regained, WVR—the mass of the water
screening levels for rejection of spacecraft materials. vapor regained by the specimen after the optional recondition-
1.6 The use of materials that are deemed acceptable in
ing step. WVR is calculated from the differences in the
accordance with this test method does not ensure that the specimen mass determined after the test for TML and CVCM
system or component will remain uncontaminated. Therefore,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This test method is under the jurisdiction of ASTM Committee E21 on Space contactASTM Customer Service at [e-mail]. ForAnnual Book ofASTM
Simulation andApplications of SpaceTechnology and is the direct responsibility of Standards volume information, refer to the standard’s Document Summary page on
Subcommittee E21.05 on Contamination. the ASTM website.
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Current edition approved Nov. 1, 2006. Published December 2006. Originally Available fromASTM International, 100 Barr Harbor Dr., PO Box C700,West
e2
approved in 1977. Last previous edition approved in 2003 as E595–93 (2003) . Conshohocken, PA 19428–2959. Order Adjunct ADJ
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