Electronics Forum: tin/lead fluxes (Page 1 of 10)

Wave flux and profiling

Electronics Forum | Tue Dec 19 16:26:24 EST 2006 | samir

Grant, Newer lead-free fluxes have 6%-10% solids content - more activator, therefore leave more "visible" residues. Old technology tin-lead fluxes got down to as low as around the 4%-6% range (I'm going off memory, so me might be wrong)... You'll

Waves soldering: not enough solder remaining on pads

Electronics Forum | Tue Jun 06 19:03:59 EDT 2017 | zsoden

Hi Steve, I just confirmed with the manufacturer and the HASL is tin/lead (or it is supposed to be, at least). Any suggestions for how to test for nickel vs tin/lead? We're using an alcohol based no-clean flux from Alpha.

Flux turns BRIGHT yellow when in contact with Tin/ Lead

Electronics Forum | Wed Apr 01 07:20:51 EDT 2020 | proceng1

The brush also turned yellow.

Flux turns BRIGHT yellow when in contact with Tin/ Lead

Electronics Forum | Wed Apr 01 12:45:31 EDT 2020 | emeto

And this is why you see it only in Leaded process I guess.

Wave Solder

Electronics Forum | Fri Mar 02 11:44:51 EST 2007 | sueph

Dave, our facility does only military and aeorspace contracts, we still use only tin/lead solder and 186 Rosin Flux, so this info is just what I need. Thanks for your imput.

Solder Paste needed

Electronics Forum | Thu Nov 04 07:51:41 EDT 2010 | leemeyer

I am in need of a 250 gram jar of Indium Corporation solder paste #81800. This is a tin lead alloy 63/37 with type WMA-SMQ62 water soluable flux. If anyone has an extra jar that is not past it's expiration date please contact me.

Flux turns BRIGHT yellow when in contact with Tin/ Lead

Electronics Forum | Wed Apr 01 11:41:34 EDT 2020 | emeto

Very interesting.Safety datasheet suggest acid that might turn yellowish. I am interested is it cleaned easily with water?

Flux turns BRIGHT yellow when in contact with Tin/ Lead

Electronics Forum | Wed Apr 01 11:48:16 EDT 2020 | proceng1

We did not try using water. Once the nozzles were left in the pot a while longer, the yellow goes away. Suggesting that it's cooking off.

Flux turns BRIGHT yellow when in contact with Tin/ Lead

Electronics Forum | Thu Apr 02 10:06:51 EDT 2020 | stephendo

If you can find some, you might want to give Adipic Acid a try. It is a powder but I have seen it work well.

Flux turns BRIGHT yellow when in contact with Tin/ Lead

Electronics Forum | Wed Apr 01 07:18:29 EDT 2020 | proceng1

We are using Superior 515 flux to clean and tin selective solder nozzles. Yesterday the flux turned a bright yellow (like a highlighter) when heated after the flux being applied. This does not happen with our Lead Free solder, only the Lead alloy.

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