Electronics Forum | Wed Aug 23 08:55:39 EDT 2000 | Dave F
Dr. Lee: Taking a tangent on your response ... When talking about alternate solders. Bismuth forms an alloy with lead with a melting point of 93�C. Are there special conditions that cause this alloy to form? Or does the alloy form commonly when
Electronics Forum | Mon Nov 05 16:54:00 EST 2007 | bbarton
There are several things that can be done to increase throughput on you screen printer, including the panelization of your bords as Steve & Hussman has pointed out. However that's of limited use if you have plenty of stock that is not panelized. That
Electronics Forum | Wed Dec 07 11:54:37 EST 2005 | russ
Would you by chance be soldering copper to aluminum?
Electronics Forum | Wed Dec 07 12:28:37 EST 2005 | PWH
I have seen problems similar to this caused by too high concentration of cleaning solution used in ultra-sonic cleaning process. If cleaning solution is used, make sure it is compatible with solder process. Also, improper mixing of fluxes and solde
Electronics Forum | Wed Dec 07 00:44:31 EST 2005 | arnold
were having a problem on the units after soldered. after few hours or days the soldered wires has green decay. what does it cause. how can i prevent this.
Electronics Forum | Wed Dec 07 07:20:02 EST 2005 | davef
We need more information about the situation. For instance: * Describe the green residue * Talk about the distribution of the problem, including a single lot or from various lots and over components and component types on the board * Tell us about t
Electronics Forum | Mon Dec 26 23:19:29 EST 2005 | arnold
is there any term called on that corrosion or green contamination?
Electronics Forum | Tue Jan 03 08:23:08 EST 2006 | davef
Look here: http://webexhibits.org/pigments/indiv/overview/verdigris.html
Electronics Forum | Thu Dec 08 08:13:48 EST 2005 | grantp
Hi, Copper oxide is green right? So the green residue after a few days is corrosion of the wire? Regards, Grant
Electronics Forum | Thu Dec 08 18:59:04 EST 2005 | KEN
Is this a wire dip tinning process? If yes, then your flux is probably trapped under the insulator, causing corrosion. BAD BAD BAD (hopefully you don't make wire harnesses for air planes or passenger trains). More info please.
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