Electronics Forum | Mon Mar 08 20:10:33 EST 2010 | davef
How about this: http://en.wikipedia.org/wiki/Redox
Electronics Forum | Thu Jun 09 14:45:21 EDT 2011 | kahrpr
Does the board look like that before Reflow?
Electronics Forum | Thu May 31 01:20:58 EDT 2012 | robertwillis
This is common and not an issue it is just the surface oxide Bob Willis
Electronics Forum | Thu May 02 10:48:42 EDT 2013 | blnorman
What's the board metallization?
Electronics Forum | Mon Jul 01 16:35:52 EDT 2013 | wpierowski
70 degrees when entering the wash.
Electronics Forum | Mon Mar 18 03:02:16 EDT 2019 | bukas
that is iron oxide, see if you can shorten reflow profile.
Electronics Forum | Thu Jun 03 18:51:25 EDT 2021 | emeto
It seems like some oxidation that flux is able to fix on the soldered pads. Is it looking like this before you reflow?
Electronics Forum | Tue Apr 27 21:24:14 EDT 2021 | kwalker
No, you're correct. Nickel oxidation can be difficult to remove
Electronics Forum | Wed May 11 19:28:12 EDT 2022 | proceng1
Could the plating be oxidized, and repelling the solder instead of adhering?
Electronics Forum | Fri May 13 22:21:05 EDT 2022 | glasscake
Alcohol? Crud-cutter? Cant recommend much without knowing plating(if any).
