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09-15-2015, 04:19 PM | #1 |
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Removal of flux
Any recommendations as to which solvent to use to remove solidified residues of flux from silver soldering (brazing). Most of it forms a glass like layer that will crack away when using a scraper. However, some of it is hiding in pores left behind after removing rust. I would like to use a suitable solvent and the miniature wire wheel on the dremel.
So which solvent? |
09-15-2015, 06:26 PM | #2 |
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Re: Removal of flux
It's important to remove the flux as it is corrosive. However, I don't believe there is a solvent that will remove it. All you can do is chip and sand blast .
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09-15-2015, 07:01 PM | #3 |
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Re: Removal of flux
The best way to remove soldering flux is to use a mixture of water and baking soda. make a saturated solution and then scrub the flux with a red scotch-brite pad and the mixture. This will lift the flux and neutralize it in one go. Then rinse the clean area with clear water and dry. If your body soldering then you need to wash the area with lacquer thinners as a last step to remove the lubricant from the paddles. Then your good to prime.
John Poole |
09-15-2015, 08:23 PM | #4 |
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Re: Removal of flux
The flux eyestein is talking about is boric acid which turns into a glass like substance. Its very different from the flux that's used for soft soldering.
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09-16-2015, 12:32 AM | #5 |
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Re: Removal of flux
I agree with the sandblast. That will also leave the surface better for the paint to adhere to.
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09-16-2015, 01:59 AM | #6 |
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Re: Removal of flux
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is a brand name so sometimes they don't use that name. They work very well for cleaning up welds rough metal etc. |
09-16-2015, 12:57 PM | #7 |
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Re: Removal of flux
There is a product we use on aircraft wiring that is a thread like material that wicks the flux off like magic.
I'll get the product name and repost, I have some in the garage...but damn if I can find it right now.
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09-16-2015, 03:12 PM | #8 | |
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Re: Removal of flux
Quote:
There are chemicals that will remove the flux but you had better research that yourself. |
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09-16-2015, 08:16 PM | #9 |
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Re: Removal of flux
Funny it works for me on Silver Solder.
JP |
09-17-2015, 02:00 AM | #10 |
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Re: Removal of flux
Quick Braid
Rosin mfg. by Easy Braid Cat.No. Q-B-5AS We use this item on military heavy's, (bombers/tankers/E-3's/E-6's) it's a flat copper like thread that comes in a little blue spool, heat the area with your solder gun touch the braid on it and it wicks the old solder and flux right off the contacts like magic, clean and ready to go again. I'm sure there is a civilian equivalent, if not this particular product, for sale at fine stores that sell solder and solder accessories.
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Keith Shawnee OK '31 SW 160-B |
09-17-2015, 11:04 AM | #11 |
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Re: Removal of flux
AKA solder-wick
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09-17-2015, 11:08 AM | #12 |
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Re: Removal of flux
We use Quickbraid all the time here, it's a normal consumer product.
However, I highly doubt rosin soldering braid will do anything to a silver soldered product. You silver solder at 1400+F not 650. I think when I solder using Stay-Silv 15 I'm over 1600F. The nice thing about Stay-Silv 15 is for copper to copper joints you don't use a flux. I've also never seen it remove flux but could be wrong there. |
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