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NASA TEERM Hexavalent Chrome Alternatives ProjectsThe overall objective of the Hex Chrome Free Coatings for Electronics project is to evaluate and test pretreatment coating systems not containing hexavalent chrome in avionics and electronics housing applications. This objective will be accomplished by testing strong performing coating systems from prior NASA and DoD testing or new coating systems as determined by the stakeholders. The technical stakeholders have agreed that this protocol will focus specifically on Class 3 coatings. Original Equipment Manufacturers (OEMs), depots, and support contractors have to be prepared to deal with an electronics supply chain that increasingly provides parts with lead-free finishes, some labeled no differently and intermingled with their SnPb counterparts. Allowance of lead-free components presents one of the greatest risks to the reliability of military and aerospace electronics. The introduction of components with lead-free terminations, termination finishes, or circuit boards presents a host of concerns to customers, suppliers, and maintainers of aerospace and military electronic systems such as: 1. Electrical shorting due to tin whiskers 2. Incompatibility of lead-free processes and parameters (including higher melting points of lead-free alloys) with other materials in the system 3. Unknown material properties and incompatibilities that could reduce solder joint reliability
Document ID
20110013572
Acquisition Source
Kennedy Space Center
Document Type
Presentation
Authors
Kessel, Kurt R. (NASA Kennedy Space Center Cocoa Beach, FL, United States)
Rothgeb, Matthew (ITB, Inc. Kennedy Space Center, FL, United States)
Date Acquired
August 25, 2013
Publication Date
April 26, 2011
Subject Category
Metals And Metallic Materials
Report/Patent Number
KSC-2011-017
KSC-2011-017R
Meeting Information
Meeting: Aerospace Industries Association Engineering Management Committee (EMC)
Location: Arlington, VA
Country: United States
Start Date: April 26, 2011
End Date: April 27, 2011
Funding Number(s)
CONTRACT_GRANT: NNH09CF09B
Distribution Limits
Public
Copyright
Public Use Permitted.

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