ASTM E2089-15(2020)

Standard Practices for Ground Laboratory Atomic Oxygen Interaction Evaluation of Materials for Space Applications

SIGNIFICANCE AND USE
3.1 These practices enable the following information to be available:  
3.1.1 Material atomic oxygen erosion characteristics.  
3.1.2 An atomic oxygen erosion comparison of four well-characterized polymers.  
3.2 The resulting data are useful to:  
3.2.1 Compare the atomic oxygen durability of spacecraft materials exposed to the low Earth orbital environment.  
3.2.2 Compare the atomic oxygen erosion behavior between various ground laboratory facilities.  
3.2.3 Compare the atomic oxygen erosion behavior between ground laboratory facilities and in-space exposure.  
3.2.4 Screen materials being considered for low Earth orbital spacecraft application. However, caution should be exercised in attempting to predict in-space behavior based on ground laboratory testing because of differences in exposure environment and synergistic effects.
SCOPE
1.1 The intent of these practices is to define atomic oxygen exposure procedures that are intended to minimize variability in results within any specific atomic oxygen exposure facility as well as contribute to the understanding of the differences in the response of materials when tested in different facilities.  
1.2 These practices are not intended to specify any particular type of atomic oxygen exposure facility but simply specify procedures that can be applied to a wide variety of facilities.  
1.3 The values stated in SI units are to be regarded as the standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Oct-2020
• ICS: 27.120.30 - Fissile materials and nuclear fuel technology
• Technical Committee: E21 - Space Simulation and Applications of Space Technology
• Drafting Committee: E21.04 - Space Simulation Test Methods

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E2089 − 15 (Reapproved 2020)
Standard Practices for
Ground Laboratory Atomic Oxygen Interaction Evaluation of
1
Materials for Space Applications
This standard is issued under the fixed designation E2089; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope would cause the observed amount of erosion if the sample was
exposed in low Earth orbit.
1.1 The intent of these practices is to define atomic oxygen
2.1.5 effective atomic oxygen flux—thearrivalrateofatomic
exposure procedures that are intended to minimize variability
−2 −1
oxygen to a surface reported in atoms·cm ·s , which would
in results within any specific atomic oxygen exposure facility
cause the observed amount of erosion if the sample was
as well as contribute to the understanding of the differences in
exposed in low Earth orbit.
the response of materials when tested in different facilities.
2.1.6 witness materials or samples—materials or samples
1.2 These practices are not intended to specify any particu-
used to measure the effective atomic oxygen flux or fluence.
lar type of atomic oxygen exposure facility but simply specify
procedures that can be applied to a wide variety of facilities.
2.2 Symbols:
1.3 The values stated in SI units are to be regarded as the
2
A = exposed area of the witness sample, cm
k
standard.
2
A = exposed area of the test sample, cm
s
3
1.4 This standard does not purport to address all of the
E = in-space erosion yield of the witness material, cm /
k
safety concerns, if any, associated with its use. It is the
atom
3
responsibility of the user of this standard to establish appro-
E = erosion yield of the test material, cm /atom
s
2
priate safety, health, and environmental practices and deter- f = effective flux, atoms/cm /s
k
2
F = effective fluence, total atoms/cm
mine the applicability of regulatory limitations prior to use.
k
∆M = mass loss of the witness coupon, g
1.5 This international standard was developed in accor- k
dance with internationally recognized principles on standard-
3. Significance and Use
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3.1 These practices enable the following information to be
mendations issued by the World Trade Organization Technical
available:
Barriers to Trade (TBT) Committee.
3.1.1 Material atomic oxygen erosion characteristics.
3.1.2 An atomic oxygen erosion comparison of four well-
2. Terminology
characterized polymers.
2.1 Definitions:
3.2 The resulting data are useful to:
2.1.1 atomic oxygen erosion yield—thevolumeofamaterial
3.2.1 Compare the atomic oxygen durability of spacecraft
that is eroded by atomic oxygen per incident oxygen atom
materials exposed to the low Earth orbital environment.
3
reported in cm /atom.
3.2.2 Comparetheatomicoxygenerosionbehaviorbetween
2.1.2 atomic oxygen fluence—the arrival of atomic oxygen various ground laboratory facilities.
2
to a surface reported in atoms/cm 3.2.3 Comparetheatomicoxygenerosionbehaviorbetween
ground laboratory facilities and in-space exposure.
2.1.3 atomic oxygen flux—the arrival rate of atomic oxygen
−2 −1
3.2.4 Screen materials being considered for low Earth
to a surface reported in atoms·cm ·s .
orbital spacecraft application. However, caution should be
2.1.4 effective atomic oxygen fluence—the total arrival of
exercised in attempting to predict in-space behavior based on
2
atomic oxygen to a surface reported in atoms/cm , which
ground laboratory testing because of differences in exposure
environment and synergistic effects.
1
These practices are under the jurisdiction of ASTM Committee E21 on Space
4. Test Specimen
Simulation and Applications of Space Technology and are the direct responsibility
of Subcommittee E21.04 on Space Simulation Test Methods.
4.1 In addition to the material to be evaluated for atomic
Current edition approved Nov. 1, 2020. Published December 2020. Originally
oxygen interaction, the following four standard witness mate-
approved in 2000. Last previous edition approved in 2015 as E2089–15. DOI:
10.1520/E2089-15R20. rials should be exposed in the same facility using the same
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E2089 − 15 (2020)
operating conditions and duration exposure within a factor of minimize abrasion, contamination and flex
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