Re: Carbon arc -- now what?

In article <11498$42e27580$3f13900e$14229@xxxxxxxxxxxxx>, ahw@xxxxxxx
says...

>
> 2) The carbon electrode got very very hot very quickly -- it was glowing
> bright red within 30 seconds or less. Also, it seems to be consumed more
> quickly than I expected, though much less quickly than a welding electrode.
> Is this consistent with what would happen with a "real" carbon arc
> electrode? Can it be run red-hot for an extended period of time, or does
> this indicate that I'm putting too much current through? (These rods are
> around 5/16" diameter.)
>

Carbon rods are usually copper coated and used with compressed air in
"arc-air" gouging of defective welds.
Compressed air forces the molten steel away from the arc, the process
makes short work of shifting large amounts of steel and makes a hell of
a racket.
http://www.twi.co.uk/j32k/protected/band_3/jk12.html

--
Mike
.

Relevant Pages

  • Re: Carbon arc -- now what?
    ... Those are the arc gouging torches mentioned elsewhere on this thread, not the heating /welding /twin carbon units. ... The local welding shop doesn't have the electrodes, nor do I have a torch, but I decided to start by experimenting with the carbon rods out of a couple of old D-size batteries. ... Haven't rigged up anything to hold two rods like a true carbon arc torch, but thought maybe I could just put a rod into the regular electrode holder and strike an arc. ...
    (sci.engr.joining.welding)
  • Re: Carbon arc -- now what?
    ... allows you to start the arc without touching your work then allows you to adjust the arc to suit your conditions as well as compenste for the slow burn off of the carbons. ... The local welding shop doesn't have the electrodes, nor do I have a torch, but I decided to start by experimenting with the carbon rods out of a couple of old D-size batteries. ... Haven't rigged up anything to hold two rods like a true carbon arc torch, but thought maybe I could just put a rod into the regular electrode holder and strike an arc. ...
    (sci.engr.joining.welding)
  • Re: Porous graphite for electrodes
    ... porous carbon rod. ... a gas flame then wiping off some black ooze until they came clean. ... had accumulated in a circle underneath the oxygen electrode, ... particles of carbon off the rod. ...
    (sci.chem)
  • Re: Carbon arc -- now what?
    ... > The old carbon arc torches are still available. ... >> start by experimenting with the carbon rods out of a couple of old D-size ... >> regular electrode holder and strike an arc. ...
    (sci.engr.joining.welding)