ASTM E595 Standard Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in Vacuum

ASTM Tests

ASTM E595 Standard Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in Vacuum

The ASTM E595 test covers a screening technique to determine the 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 recovered water vapor (WVR), can also be obtained after completion of the required exposure and measurements for TML and CVCM.

ASTM E595 Standard Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in Vacuum

This test method describes the test apparatus and associated operating procedures for evaluating the mass loss of materials exposed to 24 °C under 7 × 10 −3 Pa (5 × 10 −5 torr) for 125 hours. The overall mass loss can be classified as non-condensable and condensable. The latter is characterized here by the ability to condense on a collector at a temperature of 25°C. The tolerance is ±25 °C at 125 and 1 °C and ±23 °C at 2 °C, unless otherwise stated. Relative humidity tolerance is ± 5%.

Many types of organic, polymeric and inorganic materials can be tested. These include polymer potting compounds, foams, elastomers, films, tapes, sealants, shrink tubing, adhesives, coatings, fabrics, bond cords and lubricants. Materials can be tested 'as received' or prepared for testing with various curing properties.

This test method is primarily a scanning technique for materials and is not necessarily valid for calculating actual contamination on a system or component due to differences in configuration, temperatures, and material handling.

The criteria used for acceptance and rejection of materials will be determined by the user and based on specific component and system requirements. Historically, 1,00% TML and 0,10% CVCM have been used as scan levels for rejecting spacecraft materials.

The use of materials considered acceptable according to this test method will not ensure that the system or component remains uncontaminated. Therefore, subsequent functional, developmental and proficiency testing should be used, as necessary, to ensure that the performance of the material is satisfactory.

This standard does not purport to address all, if any, safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.

Our organization also provides testing services within the scope of ASTM E595 Standard Test Method for Total Mass Loss from Gas Output in Vacuum Environment and Collected Volatile Condensable Materials within the framework of laboratory testing services. Do not hesitate to contact our laboratory EUROLAB for your testing and certification requests.

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