How To Tig Weld Aluminum With Dc. Generally speaking, tig welding is the process of fusing metal with metal. The rule of thumb for tig aluminum is to use 1 ampere for every thousandth of material thickness.
Steels don't oxidize nearly as easily as aluminum and their oxides are not nearly as nasty. Remember, aluminum oxide (or alumina is a ceramic, and is very brittle, so it breaks off easily. Dcen should provide good penetration.
The shielding is added through a compressed bottle that provides gas flow to the weld area.
A tig welder basically comes with both ac and dc power options. Use helium gas if you choose to use the dc tig welding method. Tig” at weld.com recommends the dc setting for specific situations. This is because aluminum has basically two layers, the base aluminum, and aluminum oxide.