Electronics Forum | Thu Apr 03 22:56:48 EDT 2008 | davef
Potential impacts of using expired solder paste are [University of Bolton]: * Changed paste rheology. Result: poor print quality * Loss of solvents. Result: reduced flux activity * Changed flux formulation. Result: More difficult to clean flux residu
Electronics Forum | Tue Sep 17 15:59:48 EDT 2002 | Randy V
No-Clean fluxes are difficult to clean off boards. Cleaning effectivness depends on the washer, the chemistry, the flux type, number of reflows, and the time between reflow and washing. White residue is flux residues that have started to break down b
Electronics Forum | Tue Aug 10 07:47:12 EDT 1999 | Brian
| | | hello to everybody, | | | we have a really satisfactory no clean process, both smt/reflow and wave soldering, but we get troubles with defects rework; | | | does anybody know how to eliminate flux residues or how not to produce them during rew
Electronics Forum | Tue Nov 30 11:42:03 EST 2010 | hegemon
A simple question with very complex answers... But to simplify, you could start at this. Water soluble fluxes are cleaned using (typically) de-ionized water, using a spray wash method. Sometimes a saponifier is added to the water to help it get
Electronics Forum | Thu Nov 13 17:18:11 EST 2003 | davef
First, don�t get distracted by �OA� and �NC� formulations. This is nomenclature. We want to discuss the issue of �activity�. J-STD-004 "Requirements for Soldering Fluxes" classifies fluxes by their chemical composition, activity level and halide c
Electronics Forum | Thu Sep 03 01:15:52 EDT 2020 | kylehunter
> The problem that we have seen applying NC flux > (EF2210) at selective solder is that the flux > overspray (relative to the nozzle path) did not > see high enough temperature to activate the flux > and turn it to a non-conductive
Electronics Forum | Mon Jun 11 16:40:17 EDT 2007 | mlb
Dear GR, I represent Kyzen Corporation and would like to address a couple points in your message. Both Kyzen and Zestron are global suppliers of engineered cleaning fluids for removing flux residues from electronic assemblies. Aqueous cleaning fl
Electronics Forum | Mon Feb 13 10:33:57 EST 2006 | fredericksr
Hello, I am automating a process on our floor from wire solder hand application to dispensed paste and reflow. The process involves "lidding" a shielding lid around our assemblies for microwave quieting. The result is non-hermetic. For cosmet
Electronics Forum | Fri Oct 19 11:51:25 EDT 2007 | rgduval
By definition, no clean solder can be not-cleaned. The solder/flux are formulated to result in low ionic-contamination, hence, no cleaning. I have, however, always had at least one customer that requests their no-clean solder get cleaned. No-clean
Electronics Forum | Tue Mar 28 11:17:19 EST 2006 | smartasp
Thanks for the input Guys Yeah the not so knowledgable customer does not like to residues for cosmetic resons. The flux is for lead free process, of the no clean and water soluable type. We have explained to him that technically the residues do not
