Electronics Forum: flux and residues (Page 1 of 114)

Flux residue

Electronics Forum | Tue Jul 28 01:39:32 EDT 2009 | Sean

Hi All, I have some question about flux residue resulted from non clean process as following: 1) Under what kind of circumstances that flux residue could appear? This residue does not happen during production but did appear after some period of ti

Flux Residue

Electronics Forum | Mon Dec 28 10:55:11 EST 1998 | Ali Bokhari

How does flux residue effect the quality and reliability of the board. This is part of our spray fluxer evaluation. One of the our concerns is spots of residue on the bottom side. Any input or reference to links on web will be greatly appreciated. `

Flux residue

Electronics Forum | Sun Aug 02 10:34:00 EDT 2009 | Sean

Hi Mike, Greg, Thanks for the inputs...I will put up the photo for more discussion soon. Thanks, Sean

Flux residue

Electronics Forum | Tue Jul 28 07:42:07 EDT 2009 | Mike Konrad

Hi Sean, No-clean flux does leave a residue. Under the best conditions, it is invisible. There are many factors that can cause the residue to become visible such as an inadequate oven profile (or lack of proper preheat on a wave). Also, if wave s

Flux residue

Electronics Forum | Fri Jul 31 09:12:35 EDT 2009 | gregoryyork

Dear Sean Contrary to believe MOST formulators of No Clean fluxes or No Residue fluxes use organic acides that are in fact weak and benign. IF the residue was left on the board and you had a condensing atmosphere then you may see some issue with fal

Flux residue?

Electronics Forum | Thu May 01 18:37:31 EDT 2003 | gregoryyork

Did you get any dulling of the solder joints at all or importantly was the resist discoloured or bleached after cleaning. It is possible to absorb flux and saponifier into the resist and this will definately cause poor SIR or electromigration especia

Flux residue?

Electronics Forum | Wed Apr 30 14:35:35 EDT 2003 | clarkk

Hello all, We have received reports from two customers about electrical leakage on pcb assemblies that used Kester paste #HM531 (63/37) and washed with Kester 'Bio-kleen' saponifier and DI water. The leakage is such that when the boards receive power

Flux residue?

Electronics Forum | Wed Apr 30 19:55:21 EDT 2003 | Mike Konrad

In all likelihood, you may not be leaving flux on the board rather you may be leaving saponifier on the board. Improper rinsing is a leading cause of cleaning related board failures. The problem with some inline cleaning systems (especially old o

Flux residues

Electronics Forum | Thu Nov 15 10:19:05 EST 2012 | davidmercader

Hi, We have problems with our wave soldering process. The problem is that during the same assembly, after wave soldering, some pcb’s look not clean and other pcb’s look good. We use lead free SAC305 solder and flammable flux. We think our proces

Flux residue?

Electronics Forum | Wed Apr 30 20:33:15 EDT 2003 | davef

Haaaa!!!! Yes, we�ve seen things like that. We found that a high input impedance amplifier worked fine in a room with a controlled environment and worked poorly in the sweat-shop portion of our plant. We were using good ol� WS609, straight water w

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