Paul Borian on wed 14 feb 07
I have one of those sandblasting guns I used to spray ITC with but have
never tried sandblasting with it. Could one of these things be used to
remove welding slag, and, if so, what kind of sand would you use?
Thanks,
Paul
Patrick Cross on wed 14 feb 07
I'm not sure about your gun...but seems I saw something about that
recently. Wouldn't you use silicon carbide dust?
Patrick Cross (cone10soda)
On 2/14/07, Paul Borian wrote:
>
> I have one of those sandblasting guns I used to spray ITC with but have
> never tried sandblasting with it. Could one of these things be used to
> remove welding slag, and, if so, what kind of sand would you use?
>
> Thanks,
>
> Paul
>
>
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> Send postings to clayart@lsv.ceramics.org
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Dan Saultman on wed 14 feb 07
Paul,
Sandblasting seldom lives up to the hopes of the user unless you have
an industrial sandblaster you know, the type where the guy wears a
space suit? or you are expecting a delicate result.
Sandblasting is like sanding. It removes soft rust and patinas, paint
etc. It will take the factory finish off of steel and leave a gray
metal finish. Slag will resist the sandblasting. That's why you have to
use a chipping hammer or something like that that is more aggressive in
a localized area for slag removal. Even a wire brush on the end of your
hand drill will get rid of slag easier. But if you want to try it, you
can get sand blast media from masonry suppliers. They will guide you
through the various choices. Then button up in an old coat, put on
gloves, a full protective mask and a beanie cap. You're gong to have
sand all over you. That's why I do it outdoors in the summer. You also
need a lot of air pressure to blast with.
Good luck.
Dan
Dan Saultman
Detroit
Art Pottery, Graphic and Website Design
http://www.saultman.com
On Feb 14, 2007, at 3:26 PM, Paul Borian wrote:
> I have one of those sandblasting guns I used to spray ITC with but have
> never tried sandblasting with it. Could one of these things be used to
> remove welding slag, and, if so, what kind of sand would you use?
>
> Thanks,
>
> Paul
>
> _______________________________________________________________________
> _______
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
>
Michael Wendt on wed 14 feb 07
Paul,
I got a regular sand blaster from Harbor
Freight many years ago and it makes short
work of welding cleanup. For quick
removal, use 20-30 mesh sand.
For a smoother look, use 70 mesh sand.
I finish blast with 125 mesh sand and like
the results but it is much slower.
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave
Lewiston, ID 83501
USA
208-746-3724
http://www.wendtpottery.com
wendtpot@lewiston.com
Vince Pitelka on wed 14 feb 07
Paul Borian wrote -
"I have one of those sandblasting guns I used to spray ITC with but have
never tried sandblasting with it. Could one of these things be used to
remove welding slag, and, if so, what kind of sand would you use?"
Paul -
A small sandblasting gun really doesn't work well for removing arc welding
slag and spatter. The very best thing for that is to chip the slag with a
proper chipping hammer and then use a 4" angle grinder with a flexible
sanding disk mounted on it. That knocks loose the spatter and remaining
slag very easily. Don't use a rigid grinding disk for this. Use the
flexible backing pad and the high-quality sanding disks used for welding
cleanup.
- Vince
Vince Pitelka
Appalachian Center for Craft, Tennessee Technological University
Smithville TN 37166, 615/597-6801 x111
vpitelka@dtccom.net, wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka/
http://www.tntech.edu/craftcenter/
Michael Wendt on thu 15 feb 07
Paul,
I have a Miller 251 wire feed welder
but find that stick welding reaches into
tight places the wire feed gun won't
go so this advice applies mainly to
stick welding methods:
From the other comments about welding
slag cleanup, I realized I should add some
details on my methods.
1) If you are welding stainless with a stick
welder, I recommend you try some scrap
pieces first in various positions until you
find the best weld angle for bead finish.
I use an engine stand with an added axis
component to get the correct weld position
for this part.
2) Spray the areas adjacent to the bead with
WELCO 1620 Nozzle Shield /Anti Spatter
Spray so that the only slag will be over the
weld bead.
3) If you use Avesta 308L rod at the correct
weld setting, the slag pops off the weld so
cleanly that you scarcely have any slag to
contend with.
As with all welding and sandblasting, a
fast moving air stream cross face really
helps keep you out of the problem zone.
For accessible butt welds nothing beats the
chipping hammer and flap disk angle
grinder . I also have used the cup wire
brush on the 4 1/2 " angle grinder where
there is room to reach.
The reason I use sand blasting on pug
mill blades is no angle grinder can get
down between the blades and a wire
brush is also hard. For this reason,
try to minimize weld slag and spatter
by the means I have outlined above.
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave
Lewiston, ID 83501
USA
208-746-3724
http://www.wendtpottery.com
wendtpot@lewiston.com
Ivor and Olive Lewis on fri 16 feb 07
Rather a long time since I was designing and producing welding rods. But =
one of the aims in compounding a coating was to develop a slag that was =
self detaching. By the time you got to then end of a run the slag would =
be peeling away.
One day, Doc Finch, our Local Research Director, brought a visitor into =
the lab. As he came across to me the visitor picked up a pick and =
started to hammer a bead I had just laid down to test that very quality. =
It's not very often I loose my cool but besides the work having to be =
repeated there were issues of safety.
IF grit blasting is needed Welding Technique need vetting.
Best regards,
Ivor
Ben Shelton on fri 16 feb 07
Hey Paul,
Best thing(fastest) I have used to date for bulk slag removal from welds is
my angke grinder with a wire cup brush attachment like this
http://www.use-enco.com/CGI/INPDFF?PMPAGE=180&PMCTLG=00
It blasts through the slag really quick. REALLY quick. I don't even use my
chipping hammer any more unless there is a really stubborn splatter that
needs to be knocked off. Even then I usually just switch to a grinding disk
on the angle grinder and go to town.
What are you building these days?
Ben
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