Electronics Forum: yellow (Page 1 of 20)

yellow residue

Electronics Forum | Tue Aug 22 15:37:22 EDT 2006 | russ

Sounds like a rosin flux. Is it sticky as well? Russ

yellow residue

Electronics Forum | Tue Aug 22 18:15:50 EDT 2006 | russ

okay so both the 2005 formulas from interflux are clear alchol based fluxes. Yellow res huh? In looking at the temps here, I would say you might be too hot at both preheat and solder temp. You may be burning flux. How long is dwell time over wave

yellow residue

Electronics Forum | Tue Aug 22 13:55:44 EDT 2006 | Steve

Using no-clean flux going thru wave when comes out there is a bit of flux residue left on board. If wiped the residue shows a yellowish tint. Any ideas what this means how to get rid of it?

yellow residue

Electronics Forum | Tue Aug 22 16:46:31 EDT 2006 | Steve

Using Interflux IF2005, Have electrovert as well as new Novastar Topside of board temp is 265F solder bath 275c. I assume applying via foam fluxer. Not sure.

yellow residue

Electronics Forum | Tue Aug 22 21:11:10 EDT 2006 | davef

We agree with Russ. Your topside should be 100 - 130*C. Your 265*F is at the top of the range. Look here: http://www.interflux-electronics.com/Products/Fluxes/IF%202005M/TD%20IF%202005M.pdf#search=%22Interflux%20IF%202005%22

yellow residue

Electronics Forum | Tue Aug 22 15:34:14 EDT 2006 | Chunks

Hi Steve, What type of flux? How do you apply it? What kind of wave? Rite off the cuff, I'd say you're applying too much flux, but without knowing a little more, it's tuff to say. It could even be board related. Hate to see what WML has to say

Part of PCB silkscreen turns yellow brownish

Electronics Forum | Tue Sep 02 21:34:23 EDT 2014 | phyllishwl

Thanks Rob for your detail comment. It is really helpful!!

caps have yellow stain after wash

Electronics Forum | Thu Jun 09 12:46:03 EDT 2016 | wlsmt

Tks DeanM

caps have yellow stain after wash

Electronics Forum | Fri Jun 17 14:55:01 EDT 2016 | wlsmt

Tks Laynefelix

caps have yellow stain after wash

Electronics Forum | Mon Jun 06 12:51:17 EDT 2016 | wlsmt

My operator applied flux gel ALPHA WS-609 on MG P/N FTH101XAP (CAP ALUM 100UF 50V 20% SMD) before aqueous washing the PCBAs. Solder paste used was ALPHA WS-820. Now the caps have yellow stains. Any solution to this is appreciated. Tks

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