Electronics Forum | Sun Apr 05 12:30:22 EDT 2009 | qualityguy
Forum: Has anyone experience conformal coat peeling after HASS and the failure mechanism being low surface energy attributed to the solder mask?
Electronics Forum | Mon Jul 07 11:40:32 EDT 2003 | davef
If it's soldering, you have good plating.
Electronics Forum | Thu Jul 10 11:23:36 EDT 2003 | slthomas
I think the guys that write the checks are convinced that it's a service, not a problem. :P
Electronics Forum | Mon Jul 14 17:20:06 EDT 2003 | davef
No cleanliness testing!!!! Yer just saying that to get a response, aren't you, Steve?
Electronics Forum | Wed Jul 16 17:12:50 EDT 2003 | davef
Massa be settin' yu freee, boi.
Electronics Forum | Fri Jul 18 08:42:12 EDT 2003 | iman
I can relate to your situation. You are not alone... good luck!
Electronics Forum | Tue Apr 07 20:06:27 EDT 2009 | davef
We doubt that HASS has much to do with your conformal coat peeling. Sure, poor wicking [low surface energy] could cause the issue that you see. Here are links to a couple of good [no formulas or differential equations] articles on surface energy: * h
Electronics Forum | Mon Jul 14 12:24:02 EDT 2003 | MA/NY DDave
Hi So Steve, I must have missed something from your last subject topic. "solder fillet peeling" Are you saying you or they, Ultrasonic Clean for 20 to 30 minutes after soldering and that is suspected as causing the cracking at the top of the compo
Electronics Forum | Fri Jul 04 09:01:49 EDT 2003 | davef
You should see a coarse silverish / grayish coat on the termination that indicates that it soldered. We have to opinion [don't know] about the strength of solder connection versus the strength of component terminations.
Electronics Forum | Mon Jul 07 11:36:11 EDT 2003 | slthomas
It's definately soldering because the fillet is pulling the solder plating (I believe, from what I can see under available magnification) off of the termination, and some of the nickel plating as well.
