ASTM Committee seeks input on hydrophobic standard revisions.
Press Release Summary:
February 22, 2012 - ASTM International Committee E21 on Space Simulation and Applications of Space Technology is requesting input on upcoming revisions for ASTM F21 Test Method for Hydrophobic Surface Films by the Atomizer Test, and ASTM F22, Test Method for Hydrophobic Surface Films by the Water-Break Test. While not quantitative, these methods are used to verify that surfaces are sufficiently free of hydrophobic contaminants to proceed to application of primer, plating, adhesives, or conversion coatings.
Original Press Release
ASTM Space Simulation Committee Seeks Input on Revisions to Hydrophobic Standards
Press release date: February 17, 2012
o Low-cost alternatives to the cleaved mica blank method for verification of the absence of hydrophilic contaminants in the test materials that may invalidate the test;
o Addition of a section discussing the relationship of ASTM F21 and ASTM F22 to surface energy and the quantitative measurement of cleanliness by contact angle, comparative test solutions (such as in ASTM D2578, Test Method for Wetting Tension of Polyethylene and Polypropylene Films), or other methods;
o Consideration for an addition to ASTM F22 on the application of this method to testing on large parts where water break is observed after flowing water over the surface from a nozzle; and
o Addition of notes on the proper use and misuse of water-break testing, including proper drying after the test to prevent recontamination. ASTM International standards can be purchased from Customer Service (phone: 610-832-9585; email@example.com). ASTM International welcomes and encourages participation in the development of its standards. For more information on becoming an ASTM member, visit www.astm.org/JOIN. ASTM International is one of the largest international standards development and delivery systems in the world. ASTM International meets the World Trade Organization (WTO) principles for the development of international standards: coherence, consensus, development dimension, effectiveness, impartiality, openness, relevance and transparency. ASTM standards are accepted and used in research and development, product testing, quality systems and commercial transactions. For more news in this sector, visit astm.org/sn-transportation or follow us on Twitter @ASTMTransport. ASTM Committee E21 Next Meeting: April 19, 2012, April committee week, Phoenix, Ariz.
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