Electronics Forum | Tue Jan 08 17:29:20 EST 2002 | davef
Your research is on track. NC flux needs to reach activation temperature. Also, do not depend on the corrosion characteristics associated with the flux classification (ie, L1, L0, M1, M0, etc.), until the flux is activated by exposure to soldering
Electronics Forum | Thu Aug 20 11:24:22 EDT 2009 | ghepo
Hello Armando, this is what I found into the handbook "Failure Analysis of Electronic processes" : "...Flux residues with water-soluble flux activators that are conductive and corrosive if left on in large enough quantities are detrimental. If you
Electronics Forum | Fri Dec 16 11:21:18 EST 2005 | patrickbruneel
Steve, Water-soluble fluxes are per definition very corrosive and need to be cleaned (read the data sheet) Encapsulation will prevent humidity reaching the water-soluble acids but will not prevent reducing the metals the flux is in contact with to m
Electronics Forum | Tue Sep 21 13:10:10 EDT 1999 | Dave F
| Dear All, | | In order to understand the soldering technologies in SMT, I'd like to understand why some cards are soldered and then cleaned, or only soldered whitout water cleaning nor "ultra sound" wavelength. | | I mean that I wonder why we use
Electronics Forum | Wed Sep 22 02:45:23 EDT 1999 | Brian
| | Dear All, | | | | In order to understand the soldering technologies in SMT, I'd like to understand why some cards are soldered and then cleaned, or only soldered whitout water cleaning nor "ultra sound" wavelength. | | | | I mean that I wonder
Electronics Forum | Thu Mar 17 10:14:30 EST 2005 | davef
If you're washing the boards properly, you should see any problems, maybe a little extra floaming, but that won't be too bad. If you're running no clean, you need to aplly flux according to your supplier's recommendations. If you decide not to foll
Electronics Forum | Sat Feb 05 09:08:18 EST 2000 | Dave F
Casimir: Let me expand on something that I said in my response to your thread on ionic testing. Generally, no-clean people don�t use ROSE testing as part of their process control, because the ROSE test is essentially washing your board in DI/IPA �
Electronics Forum | Tue Aug 23 13:44:46 EDT 2022 | jojoled
Can anybody recomend a (LED-safe) flux removing/cleaning liquid, which can be used in ultrasonic cleaner in immersive application? After using one product I have been told, that none of the top suppliers of chemicals have this kind of liquid (subject
Electronics Forum | Fri Nov 03 09:41:17 EDT 2017 | davef
On your question about reliability ... " Is there testing we can do (environmental stress chambers) with which we can see the long-term effects of flux residue on solder joints?" Sure, incompletely activated low residue flux residues are potentially
Electronics Forum | Wed Feb 11 14:55:52 EST 2015 | erezah
we received assembled PCBs with spots that look like a bleach spots all over the PS and CS . The board house said that this is normal due to flux aqueous wash process. Can it cause problems (e.g. corrosion ) in the long run or cause issues when wor
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