Electronics Forum | Tue Oct 04 11:42:07 EDT 2005 | Bob Leible
I was wondering if anyone has studied the effects of tin lead solder in the wave. If we leave the same solder in the solder pot, how many COMPLETE cool downs and start ups can the solder go through before it begins to break down? Please let me know
Electronics Forum | Tue Oct 04 12:49:59 EDT 2005 | patrickbruneel
The amount of times the tin/lead solder can be melted and solidified is unlimited and the heat cycles do not affect the solder characteristics. The only reason for changing the solder pot is when impurities are at or over the maximum levels.
Electronics Forum | Tue Aug 31 11:57:03 EDT 2004 | Kris
Hi Any body have any issues soldering tin lead solder paste with lead free terminations ? Components are leaded devices and chip components have read the theoritical discussions on the forum, need to know if any body has seen any real issues tod
Electronics Forum | Tue Aug 31 21:45:49 EDT 2004 | KEN
I have experienced this directly in SMT and wave solder. Fillet lift (can) be a direct indicator to lead enrichment (but its not the exclusive symptom). Lead enrichment in smt joints reduces the interfacial strength shortening the time to creep f
Electronics Forum | Tue Aug 31 17:36:36 EDT 2004 | davef
NO-LEAD COMPONENTS WITH LEAD SOLDER ISSUE: We agree with Russ. We've dicussed this several times on SMTnet. For instance, look here http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=25394 LEAD COMPONENTS WITH NO-LEAD SOLDER ISSUE: We disa
Electronics Forum | Tue Aug 31 19:50:44 EDT 2004 | davef
To take our turn at keeping everyone else on the straight and narrow. For more on lead contamination of no-lead solder, look here: http://www.aimsolder.com/techarticles/Lead%20Contamination%20in%20Lead-Free%20Electronics%20Assembly.pdf [We apolog
Electronics Forum | Mon Dec 12 14:04:33 EST 2005 | craigj
Hi All was wondering is there anything I should be aware of or look out for if using parts with SnBi (Pb free) lead plating with Sn/Pb/Ag solder paste? I was always lead to believe that mixng lead and bismuth caused problems or are the bismuth levels
Electronics Forum | Mon Dec 12 15:57:58 EST 2005 | Samir Nagaheenanajar
4% of the alloy), there is a ternerary phase (not sure if i spelled that right) where the melting point of the alloy is MUCH less than, say, SAC305's. Sn-Bi has also been associated with...... none other than Tin Whiskers. There are some in the in
Electronics Forum | Tue Dec 13 09:15:56 EST 2005 | Samir Nagaheenanajar
5% Bi results in less plasticity * Formation of low temperature (ternerary phases) not detected. I don't advocate the use of Bismuth, per se, but rather I'm just relaying info. that I learned this from a Lead-Free seminar that I attended at Riyadh
Electronics Forum | Mon Dec 12 21:38:05 EST 2005 | davef
Effect of lead on bismuth solders * Lead from hot air leveling (HAL) coatings can diffuse through the grain boundaries of the alloy. * Lead can form a eutectic composition of Bi52Pb32Sn16 in the grain boundaries. * Melting point of this eutectic all
