Braze Resist

[Aaron Moss]

Hi,

I do a lot of silver brazing/white flux, space is tight a lot of times with the clamps, and the silver braze flows and brazes the clamps to the work occasionally.  I'm looking for something spray/dip/paint/rub on the clamps to act as a resist.  I have use carbon from the acetylene torch, but that doesn't last that long, and I have to re adjust my torch every time I blacken my clamps.  I was wondering if there was something out there, or some process that would make the clamps more resistant.

Any thoughts would be nice.

Thanks 

[bigfootnampa]

Yellow ochre, pencil lead, powdered graphite... these are common jewelers solutions.  You can use yellow ochre acrylic artist’s paint.  Maybe use a coating or dip and then also put a barrier line of soft pencil lead to help keep the solder from flowing into the clamps?  I’ve had pretty good luck applying a slurry of powdered yellow ochre, it’s kind of an anti flux.

[Aaron Moss]

Thanks, should have known about the graphite, found a spray version that has lots of reviews saying it sticks well.  Might pick up a container of yellow ochre powder, having anti-flux on the bench might be a good think to have too.

Thanks

Aaron

[teenylittlemetalguy]

17 hours ago, Aaron Moss said:

 Might pick up a container of yellow ochre powder, having anti-flux on the bench might be a good think to have too.

 

I have not used yellow ochre with brazing, but I have used it soldering (with torch) and welding (in a  kiln) with it.  I am not a fan of it, It was 100% useless welding. You mix it with a little water and let it dry. Once heated it usually starts falling (or even jumping) off so it doesn't give  complete coverage. It was a much bigger problem for me welding that it was soldering.