Electronics Forum: residue of solder paste (Page 3 of 77)

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Mon Mar 20 16:47:13 EDT 2017 | u4bga

We're currently using no-clean flux (SR-12) in a no-clean manual soldering process. The brownish flux residue impedes direct visual inspection of the solder joints. Therefore, we're forced to clean the residue off. (1) Is there testing we can do

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Thu Nov 02 13:17:06 EDT 2017 | jardcrocker

Hi...i have a question. After you solder a circuit board, what do you wash the flux residue off with? I am hesitant to use water for fear of subsequent corrosion, and have no clue as to what kind of flux is in my solder wire. automated pcb assembly

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Tue Mar 21 12:52:56 EDT 2017 | emeto

No clean is giving us problem in ICT. Other than that, a coating of flux should remain there to pretect the solder joint from the environment. In general you should not clean NO clean - it is supposed to be there.

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Thu Nov 02 15:45:04 EDT 2017 | dleeper

For low volume hand assembly, deionized water or IPA should work fine.

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Tue Mar 05 03:58:10 EST 2019 | pcformax

Hello guys, In our company we use CS-FLUX for reballing purposes in the last two years and we have no complain about the product.if you want to see details about the product there is a very helpful tutorial in youtube named 'ATI GPU removal with the

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Fri Nov 03 09:31:35 EDT 2017 | davef

On the flux reside issue that is gumming up your test probe pogos ... Short term, clean what's in process with a aerosol flux cleaner solvent. Ask your flux supplier for recommendations. Longer term, recognizing that there is no fix, your improveme

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Fri Nov 03 11:30:29 EDT 2017 | davef

regarding dwl comment, "For low volume hand assembly, deionized water or IPA should work fine." Deionized water: Deionized water is corrosive. It needs to be removed. Proof? Drop a copper coin into a covered jar of DI water and watch what happens ov

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Fri Nov 03 15:43:20 EDT 2017 | dleeper

IPA and DI water are both very common and effective methods of cleaning PCBAs. http://www.zestron.com/sa/cleaning-applications/smt-electronic-cleaning/pcba-cleaning/aqueous-cleaning.html http://blog.gotopac.com/2010/11/18/ipa-as-a-universal-cleaner

Re: white residue

Electronics Forum | Thu Jan 28 09:45:44 EST 1999 | parag

| | i am working with the noclean process and getting white residues on the bottomside of the board probably due to the | | wave soldering flux.i am using a no-clean solder paste and a noclean wave solder flux.The boards passed the accelerated tempe

Black residue at end of wave soldering

Electronics Forum | Thu Mar 16 18:38:30 EST 2000 | cpgoh

Hi, I would appreciate some help here.. I am black residue with my wave soldering provess with my Electrovert machine sometimes, they are dotted all over the board ! I am also using no clean flux through an externel spry fluxer unit.. thanks Darren


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