Electronics Forum: dull rough solder joints (Page 1 of 14)

Open joints

Electronics Forum | Wed Oct 03 17:07:52 EDT 2001 | davef

We have had soldering problems with fine pitch QFP in the past [and probably will in the future]. Several questions leap to mind: * When you took your profile on the component pads, do you profile on the pads that did not solder well? * When you say

Problem with solder joints in wave solder

Electronics Forum | Wed Jan 15 21:55:41 EST 2014 | padawanlinuxero

we do that and there's a variation on the solder temp. sometimes around 10 degrees, we have 2 solder pallets that are run in intervals of roughly 3 1/2 minutes a part (the time that take the operator to put all 3 terminals in a 42 pcbs per board, and

grey appearance on solder joints after batch cleaning

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

grey appearance on solder joints after batch cleaning

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

Dull joints caused by NiAu PCB surface ?

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 !

Dull joints caused by NiAu PCB surface ?

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

cold solder after drop test

Electronics Forum | Wed Jan 07 07:16:25 EST 2004 | davef

Cold solder prior to properly performing a well designed drop test. Actually, "cold solder" means different things to different people. Two dull solder connection conditions are: * "Disturbed" solder joint: a solder joint that has an "angular face

blackened/black solder

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

blackened/black solder

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.

blackened/black solder

Electronics Forum | Wed Mar 28 13:14:38 EDT 2007 | amelara98

I am having problems with a product we receive from our overseas plant, where there is excessive "dullness" of solder joints/metal surfaces after running a board on a pallet through wave solder. Seems to be an issue of the pallet, as the solder appe

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