Aluminum DC Tig

You have to use DC Electrode POSITIVE, for this to work. Running a fast pulse rate (200 hz) will make it flow better.

Use the biggest LANTHANATED tungsten possible.

The usual method is to use AC, usually with hi-frequency, to stabilize the arc. The AC cleans the material on one phase and welds it on the other. If you have an AC-DC box it may already have that.

Frankly I never heard of welding aluminum with DC although I'm certainly not arguing whether or not it can be done, just that AC was used everywhere I saw aluminum welded. In fact I once used a AC buzz box with a hi-frequency add on and a portable generator to weld irrigation pipe in the field.

Cheers,

John D. Slocomb (jdslocombatgmail)

--Ernie you rock! Thanks!