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> Brown sooty residue when mags welding
post Sep 27 2019, 09:12 PM
Joined: 25-Feb 11

Hi Guys
I'm getting a brown sooty residue on welds when mags welding when I turn the amps up to get a spray arc. Using argon with 20%co2 on steel, can see a swirling mist coming from weld pool.
No issues when amps are lower.
Welds are ok when cleaned off, just covers previous welds with this brown residue.

Technic Al
post Sep 27 2019, 11:24 PM
Joined: 14-Oct 03

Its just silica thats produced when the Silicon in the wire and the steel gets oxidised by the active gas...without it your welds would be full of porosity
post Sep 28 2019, 02:41 PM
Joined: 25-Feb 11

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