Electronics Forum | Thu Nov 01 03:10:07 EST 2001 | Brian Sloth Bentzen
Will the gold from some Ni/Au surfaces make the solder joints appear dull and a slightly rugged on the surface ? Does anyone have any experience with this ? Thanks !
Electronics Forum | Mon Nov 05 04:59:59 EST 2001 | madreindeer
hi, I have found dull joint when I have done trial if boards and cooling too fast.Also with Nitrogen.Some of paste don�t like Nitrogen too much. Also I have seen this when profile is not hot enough or flux haven�t survived to liquidus point. I wou
Electronics Forum | Thu Nov 01 17:40:52 EST 2001 | davef
Listen to Wolfgang. Your dull solder connection is a process indicator. Some 63Sn / Au solder connections look grainy, depending on how your process them and the materials involved. Gold dissolving in tin forms an intermetallic compound [AuSn4] th
Electronics Forum | Thu Nov 01 04:52:50 EST 2001 | wbu
Hi Brian, yes that�s possible due to the presence of Au in the joint but nothing to worry if the Ni/Au is done properly (means not to much Au in your plating). "rugged" I haven�t noticed yet, that may depend on the definition and maybe the magnifica
Electronics Forum | Tue Feb 11 12:02:52 EST 2014 | javierec
Process: Batch Cleaner, @16% concentration. Concentration is checked daily. Cleaning after Wave Process. See attached pictures and comment and what you think causes the solder joint to turn grey. i have read post that say the grey dull looking sol
Electronics Forum | Tue Feb 11 14:05:11 EST 2014 | dontfeedphils
I can't speak too much as to why your joints are appearing dull, even with the booster. I can recommend a new chemistry that Kyzen has out that I've been running for about a year now. Price is about the same, it can be run at low(er) concentrations
Electronics Forum | Wed Aug 05 17:52:37 EDT 1998 | Jose Moreno
Dulling the solder joints helps making a better inspection on the joints. I would like to know if somebody has had experience using soldering materials in order to accomplish this task. Your recommendations are welcomed.
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 | Wed Mar 28 14:38:24 EDT 2007 | amelara98
solder joints are dull on the bottom, and surprisingly, darkened, "black" on the top, especially at one location only.
Electronics Forum | Thu Jul 09 11:32:16 EDT 1998 | Justin Medernach
| What should a good gold joint look like? We've run boards for our customers that look kinda dull but seemed to wet properly and the boards fired up just nicely! Should they look nice and shiny like our HASL boards or is "a shiny joint is a good joi
