Electronics Forum | Thu Mar 10 10:06:08 EST 2005 | steve
OK all you Gurus here's one for ya. Customer is tinning wires with standard eutectic solder in a solder pot. There is a blue tint to the solder in the pot. After tinning with OA flux, which I will change to NC shortly, he has clear teflon insulation
Electronics Forum | Thu Mar 10 13:05:41 EST 2005 | patrickbruneel
This phenomenon is caused by a high amount of halogens (Cl, Br etc.) used in the flux activators or in the flux surfactants. We've seen effects creating all colors of the rainbow. Changing to No-Clean (halide-free) will eliminate this color effect.
Electronics Forum | Tue Sep 29 08:17:30 EDT 1998 | Jim Zanolli
Teka Interconnection Systems may have a connector with their Solder Flux Bearing Lead technology -- by an economical pre-deposit of solder and flux on each connector lead, the connectors can be reflowed in convection with other SMD's without adding s
Electronics Forum | Wed Aug 04 17:44:43 EDT 2004 | davef
Left click on the blue underlined "davef" [just left of the Lou Reed head] on one of my postings. An email dialog screen should popup and you should be able to paste [or attach] your pix there.
Electronics Forum | Wed Oct 27 09:39:54 EDT 2004 | loz
Hi all, been recently wave soldering some pcbs with no problems and have now noticed what looks like blue residues on some solder joints. We have been running this product for around six months and this is the first time we have seen this. It is rand
Electronics Forum | Thu Oct 28 11:41:21 EDT 2004 | Steve Stach
Hello Loz, Blue residues on circuit boards can be caused by copper corrosion, component body deterioration, marking permanently, and adhesive break down. In this case, a more subtle mechanism appears to be possible. This is a no clean application
Electronics Forum | Mon Jun 07 03:03:12 EDT 2004 | Frederic
I have a question about solder paste. When the solder paste lost her tackines (dry out) how can i refresh this solder paste?. Can i add a little flux? or it is ban. I noticed that after reflow solder joints look shiny but i can see some discolour (f
Electronics Forum | Thu Mar 10 15:43:06 EST 2005 | steve
Thank you both for your assistance. I knew that I could count on you folks. The customer has purchased No-Clean flux and is using it as we speak. Hows that for customer service.... All in a days work... Thanks again You make me look good!!! Steve
Electronics Forum | Tue Feb 28 07:50:06 EST 2006 | amol_kane
we have used blue and red color solder mask on a trial basis for our LF assemblies. We are performing expts using Imm Sn and Imm Ag to determine the best surface finish. Also, we pass the LF baords thru the same inline wash as you dont wash away the
Electronics Forum | Mon Aug 04 16:28:49 EDT 2008 | grics
Hey Patrick, thanks. The area that is dark (half circle) is where the camera was. It is the same color as the above. But you may be correct still. I also noticed that the majority of the solder balls were along the "Dark" blue depression around the
