NDLI: Nasa teerm hexavalent chrome alternatives projects

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Nasa teerm hexavalent chrome alternatives projects

Content Provider	NASA Technical Reports Server (NTRS)
Author	Rothgeb, Matthew Kessel, Kurt R.
Copyright Year	2011
Description	The 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
File Size	16598589
Page Count	49
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110013572
Archival Resource Key	ark:/13960/t8x976c9w
Language	English
Publisher Date	2011-04-26
Access Restriction	Open
Subject Keyword	Metals And Metallic Materials Metal Coatings Solders Electronic Equipment Corrosion Tests Environmental Tests Chromium Materials Selection Lead Metal Alternatives Protective Coatings Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Presentation

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