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Welding Aluminium With Dc Tig. In contrast MIG consists of both AC and DC currents. You can also get pretty good results on the 1100 series pure Aluminum and 2219 specialty alloy.
When you do it the other way you need to stir the weld pool a bit to break the oxide. The argon cools the TIG torch shields the tungsten and stabilizes the arc. It takes some practice to weld an even TIG seam.
The flux cleans oxides from the aluminum and it helps shield the molten puddle.
Its designed primarily for oxy-fuel welding aluminum but TIG. Its designed primarily for oxy-fuel welding aluminum but TIG. The SWS ALUMTIG 200 AC DC TIG is the ultimate portable machine for welding Aluminium steel and various speciality metals including Titanium and Chromoly. In contrast MIG consists of both AC and DC currents.