How to remove SS brazing flux ?
 

I have been using some SS/tooltip brazing flux which works fine for the
item, the trouble is it forms a very tenacious glassy residue. I have
been boiling it and a couple of hours seems to remove the flux residue
fairly well but was wondering if anyone had ideas about additions such
as acids or bases which might help it along. The glassy residue seems
very tough and resistant to a chipping hammer, that just locally chips
the surface. My sand blaster is currently not operational so thats not
an option. Shame it isn''t like aluminium welding flux, go away for an
hour and rinse off the remainder that pretty well dissolved itself.

I usually quench the part in water when it has cooled to somewhat above
the boiling point of water. Then wire brush the part.
Dan

In article , David Billington
says...

I have been using some SS/tooltip brazing flux which works fine for the
item, the trouble is it forms a very tenacious glassy residue. I have
been boiling it and a couple of hours seems to remove the flux residue
fairly well ...

Boiling water. The first thing I do when I go to silver braze
an item is to 'put the water on for tea...'

Jim


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David Billington wrote:
I have been using some SS/tooltip brazing flux which works fine for
the
item, the trouble is it forms a very tenacious glassy residue. I have

been boiling it and a couple of hours seems to remove the flux
residue
fairly well but was wondering if anyone had ideas about additions
such
as acids or bases which might help it along.





Hot, strong solution of baking soda or washing soda in water, let the
part soak about 20-30 minutes, rinse.
Mike