Electronics Forum | Mon Jul 18 00:00:35 EDT 2005 | adlsmt
I have nothing to add technically but we have been washing no-clean for years. Use very clean filtered DI water to avoid the white residue issue and some good detergent or sopanifier and you will get great results.
Electronics Forum | Wed Aug 17 17:41:58 EDT 2005 | Kris
What is the surface finish of the board ? Some flux are known to react with certain type of board chemistry. Have you verified the compatibility of your solder mask and flux ?
Electronics Forum | Fri Sep 09 15:50:08 EDT 2005 | chunks
The hand assembled part is soldered in? If so, the white residue may be from the operator using some added wave solder flux to get better wetting when hand soldering.
Electronics Forum | Thu Feb 16 11:42:29 EST 2006 | russ
I use Alpha 857 W.S. for wave is that what you mean? If so, I love this stuff, it solders everything. one downside to it is convection (wave , rework) can dry it out and leave white hazes and even residues at the joints.
Electronics Forum | Wed Nov 25 09:40:56 EST 2009 | Sean
Hi Greg, The board is with immersion silver finishing..One of my friend had the same issue even with PCB OSP finishing.. Besides, no white residue found on the top side... Its only appear on the bottom side but no so obvious... Rgds, Sean
Electronics Forum | Wed Feb 24 11:28:09 EST 2010 | vleasher
I apologize for being so vague. It is a standard leaded process using ALPHA OM-5100 for the SMT. So would a reduction in wash temp result in less white residue?
Electronics Forum | Mon Oct 22 16:47:09 EDT 2012 | edmundo
We use a NC Flux in the wave solder and after aAcelerated Life Test cicle we found contamination white residues paths between some solder points. Does somebody know a possible cause for this contamination.
Electronics Forum | Mon Jul 01 13:57:58 EDT 2013 | wpierowski
Recently on one product, I found a white residue on the solder joints only that is more of a gray in color. Our lab told us it was a tin oxide with an unknown organic. This is with a lead free OA paste and it only shows after wash. Has anyone seen
Electronics Forum | Mon Jan 07 21:07:00 EST 2002 | davef
Using a flux pen sounds like a good idea. Comments are: * I assume you�re talking aqueous flux. If not, some NC flux pens leave white residues. Nearly all of 15 samples suffered to varying degrees with white residues. * Use the same flux that you
Electronics Forum | Mon Mar 31 01:11:14 EST 2003 | yukim
Hi, we are about to change solder paste for cost issue. Currently using a no clean Sn63 solder paste and tried several others, all no clean, Sn63 and Sn62. Want to ask about reliability test: we did thermal shock test for 8 days. The flux residue cha
