Electronics Forum | Tue Aug 27 11:08:24 EDT 2002 | slthomas
We use an evaporator, so that we only have a sludge of flux residue and solder metal to dispose of via the hazmat handling service. We also route stencil washer waste water into it. We use a 30 gallon drum and have it hauled off maybe twice a year,
Electronics Forum | Tue Aug 27 08:13:29 EDT 2002 | mk
Our company uses a conveyorised aqueous cleaner to wash printed circuits after water soluble solder paste is reflowed. The system is closed loop with carbon and resin filters. The water eventually will get dirty. Can it be dumped? Treated? How do y
Electronics Forum | Sat Sep 07 06:57:33 EDT 2002 | mk
I agree but, are there really heavy metals in this water? Our process is as follows. Print Paste Reflow Board (no components, water soluble paste only) Wash Board Same reflow profile for almost every order so no solder balling issues etc. Carbon an
Electronics Forum | Thu May 12 17:06:22 EDT 2005 | George
I give up, what the heck is flux powder?? Spent flux yes, flux powder? Please educate me. What am I missing here?
Electronics Forum | Fri May 13 08:08:15 EDT 2005 | davef
George We're not sure about the application of powder flux for original poster to this thread, but a common application of powder flux is in brazing. This powder flux can be either metal bearing or just flux. As an aside: Soldering and brazing are
Electronics Forum | Mon Sep 09 13:46:34 EDT 2002 | dragonslayr
Your lack of obvious solder balls indicates you have a decent process. However, there are still small solder balls that are free and floating on the surface of the boards prior to wash. That same solder ball is washed off and ends up in the wash solu
Electronics Forum | Mon May 02 14:10:18 EDT 2005 | F1358
Does anyone know about methods for disposal of expired flux powder?
Electronics Forum | Mon Sep 09 19:17:56 EDT 2002 | dragonslayr
steve- once again I mention that the lead that is actually in the water is in solution i.e. the lead is in a molecular form that has attached to a H2O molecule. To have a minimum of lead that is below the regulated ppm, there cannot be any chunks,
Electronics Forum | Mon May 02 14:45:29 EDT 2005 | davef
Dispose according to the MSDS for the product. As a point of comparison, here is a MSDS for another flux: http://www.kester.com/MSDS/USA%20and%20Canada/English/Fluxes/MSDS%20135%20US%20(24Nov03).pdf ... which says: 13 Disposal considerations Prod
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?
