Electronics Forum | Tue Nov 07 10:37:36 EST 2006 | greg york
Buy decent solder in the first place especially with Lead free and the savings made could be around 50% of the dross production for Lead Free when compared to Leaded. Buy poor quality solder you will need a solder recovery unit of some format. Cheers
Electronics Forum | Thu May 04 21:33:30 EDT 2006 | davef
For everything you wanted to know about waterjeting, look here: http://www.waterjets.org Goto page 9 of the 'picture pages' for some chopped-up circuit boards. There is at least 70 equipment suppliers out there. So, having someone that has cut th
Electronics Forum | Thu Mar 01 14:54:45 EST 2007 | slthomas
By used to you mean scraped from stencils and bucketed? If that's the case I'd check with the guys that recycle my dross. That's who did ours when we had volumes that justified it. Now we have so little it goes into the hazmat hamper with everything
Electronics Forum | Thu Mar 01 16:47:05 EST 2007 | ratsalad
The guys that take our dross (and pay us for it) take our barrels that contain scrapped solder paste as well. Also in the barrels are the nitrile gloves and disposable towels used in solder paste handling and cleaning. They pay us for the metal c
Electronics Forum | Wed Mar 28 14:06:46 EDT 2007 | realchunks
Hi A, Your subject is black solder, but you decrribe the solder as dull? Dull solder joints could be dross related, or even flux related. Are there any other related defects? But "dull metal sufaces" makes me thing this board was subjected to so
Electronics Forum | Fri May 18 04:40:51 EDT 2007 | gregoryyork
Wash them in Saponifier frequently at around 40C rinse and dry thoroughly. I would imagine it could be going white if you have a resin system in the flux that is not water soluble. Ensure you are using suitable pallet material up to 300C for Lead Fre
Electronics Forum | Tue May 22 03:11:40 EDT 2007 | Frank
We also keep our pot just below the liquidous state over night. It takes a lot less time to get it to temp than a cold pot and we aren't creating dross over night. If you have been shutting down over night for some time, then you can get an average
Electronics Forum | Thu Jun 14 06:41:28 EDT 2007 | davef
No, raising the solder pot temperature to 800*F will not affect affect your solder alloy. We expect that you had a fairly high level of intermetallic compound generation, but most of that would be included in the fairly high dross generation that ha
Electronics Forum | Mon Jul 16 08:42:14 EDT 2007 | realchunks
Hi Scott, Here is another thought. Check your wave solder machine visually. Does the wave flow on both sides of the nozzle? If not, you may have some dross build-up which may be causing your problem. Generally it will only happen on the very fir
Electronics Forum | Tue Dec 18 11:01:45 EST 2007 | Claude_Couture
I totally agree with you on that point, and can only suggest complaining to your supplier about it. I guess I'm fortunate enough to have a supplier that care enough to keep me informed about stuff like that and suggest the proper corrective method. S
