Electronics Forum | Sat Mar 03 03:56:04 EST 2001 | wister
I had confused by same problem, the reason I found is the interval between wave soldering and cleaning is too long and did not set the temp. of D.I water at 120F~150F. Kester flux is good. Rgs, Wister
Electronics Forum | Tue Jan 30 07:29:21 EST 2018 | charliedci
I believe the correct statement (I've been told) is "the process is no clean". The solder paste is "low residue". As a CM, in the past we had customers that insisted on a wash after soldering. We used DI water with a saponifier which had mixed result
Electronics Forum | Sun Aug 29 19:17:34 EDT 2004 | aqueous
Chen, It is always best to place one�s effort on determining the cause and content of the residue rather than trying to work around it. The first thing you must determine is the nature of the residue. Is it flux? In many instances, the residue is
Electronics Forum | Tue Jan 30 10:44:02 EST 2018 | emeto
If you go even further, the flux residue actually isolates the joints from the surrounding atmosphere, so it is actually supposed to be there. Adding a step in your process that is obsolete, doesn't comply very good with the whole lean concept. I don
Electronics Forum | Thu Feb 01 15:36:42 EST 2018 | davef
Not to be repetitious, I just don't remember if this has been said or not, I'm old, give me a break. Some people have found that DI water is too thick to properly remove flux residue under low stand-off components.
Electronics Forum | Fri Mar 02 15:44:26 EST 2001 | traviss
Is this after wave or wash? Its too bad the archives are gone this one has come up a bunch of times. Most of the time its caused by rosen or no clean flux being put through a water wash. There are several other possibilities. You will probably hear w
Electronics Forum | Thu Aug 20 07:10:46 EDT 2009 | davef
Questions are: * On what portion of the second side of the board [eg, solder only, solder mask only, etc] do you see this white hazy residue? * Could you attach a picture? * You mention cleaning this residue. What have you used to clean the residue?
Electronics Forum | Mon Dec 18 13:00:47 EST 2006 | grantp
Hi, We have a white residue, which is visible, and we would like to have the produce clean as it's a PCI card, so users see the PCB. I am wondering if we need to install a cleaning stage to the line for these kinds of products. Can anyone give som
Electronics Forum | Mon Jul 26 16:31:02 EDT 2004 | Sue PH
We use Kester 186 flux and the STU people would sometimes find white residue after cleaning with Isopropyl at the solder station. We have Lenium (Petroferm)in our vapor degreasers, and now they use Lenium at their stations as well as final clean, an
Electronics Forum | Wed Mar 24 12:34:33 EST 1999 | Scott McKee
| Hi, | I have a customer who's electronic assemblies produce RF. He is insisting upon aqueuos cleaning. We switched to a no clean solder years ago and no longer have an aqueous system. | Is aqueous cleaning necessary to eliminate 'cross talk' of
