How To Tig Weld Aluminum T Joint. The weld strength will be much lower and the weld will be brittle and can break much easier from shock. Generally speaking, tig welding is the process of fusing metal with metal.
Trying to weld without a inert shielding gas will create a weld full of aluminum oxides and gas porosity. With tig welding, you’ll need to learn how to control the gas. When tig welding aluminum, alternating current (or “ac”) is almost always used.
Molten aluminum will react with oxygen in the atmosphere.
Removing the oxide layer from the base metal with a stainless steel wire brush and acetone is the most crucial step to tig weld aluminum. When tig welding aluminum, alternating current (or “ac”) is almost always used. A tig welder basically comes with both ac and dc power options. In this video, you see me sliding the tig finger up the side of the aluminum tee joint from start to finish.