Electronics Forum | Fri Apr 04 14:49:51 EDT 2008 | tombstone
Flux seperation is a common problem observed due to expiration of paste. The symptom is a yellow layer of flux when you open the jar. Excess flux separation will cause priting problems such as smearing and slumping.
Electronics Forum | Thu Apr 03 17:25:49 EDT 2008 | alexs
Hi All, I have some question about expired solder paste. What would be some of the effects regarding assembly quality. Is there any changes in flux composition toward the end of shelf life? Thanks in advance for any replies.
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 | Mon May 02 14:10:18 EDT 2005 | F1358
Does anyone know about methods for disposal of expired flux powder?
Electronics Forum | Tue May 03 10:32:58 EDT 2005 | davef
DenM: What is the connection between the your contact that disposes of solder and F1358's [the original poster] need to dispose of expired flux powder?
Electronics Forum | Thu Jul 19 08:04:04 EDT 2001 | dahsr
I have a sealed and refridgerated 350g jar of solder paste (water soluable flux). According to the label it expired July 1st. 2001 after the 6 month shelf life. Can this be used? Why or why not? What is the relevance of the expiration date? Can I re-
Electronics Forum | Sat Dec 18 15:23:05 EST 2004 | grayman
We used to add flux on a "expired" solder paste but we discontinued as there are many problems and customers complaints coming from our American customer. Like unwetted solder pads,dull and cold solder and many others. The profit is really ok but qua
Electronics Forum | Wed Sep 09 10:24:03 EDT 2009 | clampron
Hi Dave, J-STD-005 is the standard for solder paste requirements. I checked J-STD-006 for solder alloys fluxed and non fluxed and could not find any information on expired wire and how to requalify. Is there some other place that I should be looking
Electronics Forum | Fri Dec 18 12:25:40 EST 2015 | deanm
We are required by AS9100 to keep expired material/chemicals off the floor. Examples include solder paste, flux, adhesives, conformal coating, etc. We have a system in place to prevent such occurrences but once in a while something is not accounted f
Electronics Forum | Wed Jan 30 15:10:09 EST 2013 | hegemon
Restoration of the fluxing properties? Can't see adding a liquid flux to a solder paste (assumed expired shelf life) in order to "restore" anything. If the volatiles in the original paste are gone, then adding more carriers and volatiles will not pr
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