Electronics Forum: flux and residues (Page 1 of 143)

Selective soldering: sprayed flux residues

Electronics Forum | Tue Dec 11 10:12:36 EST 2007 | George

Hi everybody, Is there any criteria as far as No-clean flux residues surrounding solder joints when using selective solder machines? I have a Novastar SPA 400 and use flux NC kester 959. If I decrease the amount of flux, then I experience problems w

Selective soldering: sprayed flux residues

Electronics Forum | Thu Dec 13 08:02:02 EST 2007 | realchunks

You may want to try raising your pre-heater if you have one. I would also suggest trying different fluxes that may be a little more active so you can use less. What type of fluxer are you using? Selective solder flux residue is a gray area. This i

White residues

Electronics Forum | Mon May 26 08:59:32 EDT 2008 | davef

It's possible that the flux residues from the solder paste used in your SMT process is not compatible with your water wash process. For instance, some no-clean fluxes leave resudues that are not water washable. When these residues are washed, they de

Wave flux and profiling

Electronics Forum | Mon Dec 18 23:24:50 EST 2006 | grantp

Hi, Yes, I would hate to resort to cleaning, but the product must be clean. We have been using palettes to keep most of the flux off the PCB, but there is still residue around the connectors. Does anyone suggest a good no clean flux to use with le

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

Vapor batch cleaning of flux residues

Electronics Forum | Tue Aug 18 12:14:59 EDT 2009 | zanolli

We are looking for suppliers of liquid vapor degreaser batch equipment for flux residue cleaning of PCB’s. Any recommendations? Thanks

White residues

Electronics Forum | Mon Apr 29 10:42:47 EDT 2002 | Jim M.

I had problems with white residues on both WS609 and WS 3060.The WS 3060 turned out to be a carbonized material.The composition after analysis (Energy Dispersive X-ray spectrum) turned out to be tin,tin,phosphore and cloline and tin. Alpha also have

White residues

Electronics Forum | Wed Apr 24 21:27:10 EDT 2002 | davef

50�C. * Boards are too hot to be cleaned. Yes, saponified cleaners will remove heat decomposed WS flux. Well, I suggested changing paste to another poster, because he mentioned overheated solder connections and I guessed that his white residue was

No-clean, water-based flux residues after wave...

Electronics Forum | Tue Feb 03 13:53:41 EST 2009 | allwave

The spec for all PCB suppliers is "solder mask over bare copper using LPI on external layers (green)". The flux we use is No clean 270WR flux (AIM). As far as process parameters, like I mentioned before, same parameters for several suppliers, only on

No-clean, water-based flux residues after wave...

Electronics Forum | Tue Feb 03 15:23:21 EST 2009 | gregoryyork

Hi George This is down to the different cure temperatures used during PCB process. No problem with the flux or your settings You should be seeing a waxy greasy oil like substance on the dirtier board. Or the resist has absorbed the flux residues not

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