Electronics Forum | Fri Dec 07 15:17:06 EST 2001 | davef
Dull / shiny, I�m not sure that�s a proper indicator. If �Liquid Tin� adds a thin coat of solderable material without converting the corrosion on the surface of the lead, the corrosion will [probably] continue to increase and potentially affecting t
Electronics Forum | Thu Jan 17 20:09:43 EST 2008 | davef
"silver saver" paper It can be purchased as an industrial product: * corrosionvci.com/corrosion_control_vci_paper.htm * daubertcromwell.com/pdf/silverg.pdf * corrosionprotection.net/corrosion/proddetail.php?prod=silversaver48R * jamesdawson.com/Silv
Electronics Forum | Sat May 17 09:12:50 EDT 2008 | davef
Lead-free means expensive tin. Tin is an excellent solvent. So, metal parts in contact with molten tin must be expensive enough to resist that nature of tin. To learn more about this: * Search the fine SMTnet Archives * Look here: "Liquid Tin Corrosi
Electronics Forum | Thu Jul 24 22:58:13 EDT 2008 | davef
At the 2004 IMAPS Nordic Conference, Claus W�rtz Nielsson from Nokia Mobile Phones published "The Evolution of Surface Finishes in Mobile Phone Applications" [www.imaps.org/adv_micro/papers/Nordic2004paper.pdf]. Some of the results were: * Corrosion
Electronics Forum | Tue Jan 20 17:00:05 EST 2009 | davef
For lack of a better description, we'd say, "Yes, that could be corrosion." Regardless of what you call it, it looks nasty and should not be allowed on bare boards of any sort. Based on your picture, we can't tell you whether it's related to your con
Electronics Forum | Tue Nov 29 17:18:26 EST 2022 | davef
Yes, electronics manufacturing is a volume producer of cardboard waste. If the components are ESD-critical, cardboard and most plastics are not ESD safe. Static charges can be generated on these materials during handling by the friction of dissimila
Electronics Forum | Wed Feb 23 21:38:26 EST 2000 | Dave F
Mike: I'm with you. The only variable is the component. Look for corrosion, uneven plating, or crud on one of the end-caps. Good luck. Dave F
Electronics Forum | Tue Dec 26 12:35:09 EST 2000 | Dave F
Your English is fine. Your assessment that corrosion on a portion of the metalization on the end of a component is causing the tombstoning is reasonable. We've seen that before. Corroded components received from a supplier is not acceptable as an
Electronics Forum | Wed Feb 23 21:38:26 EST 2000 | Dave F
Mike: I'm with you. The only variable is the component. Look for corrosion, uneven plating, or crud on one of the end-caps. Good luck. Dave F
Electronics Forum | Thu Jun 21 21:02:45 EDT 2001 | davef
Yano, at lot this discussion is kinda school boy theory. Other issues are: * Soldering time * Corrosion [did we say that already?] * Safety [ie, personnel, plant, environment] * Cost of ownership
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