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Cleaning Brazing Flux


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  #1  
Old 02-15-2016, 02:39:48 PM
Holland501 Holland501 is offline
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Default Cleaning Brazing Flux

I was wondering if anybody could suggest a flux that is easy to remove. Sometimes brazing is the best means of joining/repairing something rather than welding. However trying to remove the flux can sometimes be almost impossible. Most recommend soaking the object in very hot water for a period of time. Most of the time that isn't a practical option. Any ideas would be appreciated. Thanks
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Old 02-15-2016, 02:42:30 PM
Thaumaturge Thaumaturge is offline
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Default Re: Cleaning Brazing Flux

Simple borax. My nephew swears by it for his blacksmithing.
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Old 02-15-2016, 05:46:35 PM
Holland501 Holland501 is offline
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Default Re: Cleaning Brazing Flux

I've got some 20 Mule Team Borax. I'll give that a try and see how difficult it is to remove the glassy flux after it cools.
Thanks for the suggestion.
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Old 02-15-2016, 07:29:42 PM
Holland501 Holland501 is offline
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Default Re: Cleaning Brazing Flux

I have a few coated rods left but my next purchase will be bare rod if I can come up with a flux that is easy to remove when the job is finished.
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Old 02-15-2016, 07:36:38 PM
slip knot slip knot is offline
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Default Re: Cleaning Brazing Flux

I use bare rod and a blue multi purpose powder flux. its pretty hard to get off.
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Old 02-15-2016, 07:53:25 PM
J.B. Castagnos J.B. Castagnos is offline
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Default Re: Cleaning Brazing Flux

Bead or sand blasting removes it, don't know if it would be practical in your case.
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Old 02-16-2016, 08:35:59 AM
dependable dependable is offline
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Default Re: Cleaning Brazing Flux

Harris Stay-Silv flux with their Dynaflow bare brazing rod does a neater job than the pre fluxed rod I have. Have not noticed much flux residue, but if there, have not tried to remove it.
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Old 02-16-2016, 10:34:10 AM
beezerbill beezerbill is offline
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Default Re: Cleaning Brazing Flux

Only thing I've found that works is scraping it off - helps to have water to help dissolve it some while scraping.
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Old 02-17-2016, 01:03:01 PM
Holland501 Holland501 is offline
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Default Re: Cleaning Brazing Flux

I'd like to thank everybody once again for offering their suggestions. I did try the plain Borax. It seemed to work fine as a flux but was just as hard to remove as the flux coating already on the rods.
I actually tried using bare rod on 'freshly cleaned' steel. It wetted the same as with flux but with nothing to clean afterwards. Since anything I braze isn't of a critical nature, I'll probably use that method in the future.
Thanks again.
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