What is the difference between TIG welding and hand welding for aluminum? For example, the use of welding rods and welding machine?

Welding aluminum alloy, argon arc welding needs to use AC argon arc welding machine, this is in order to use the cathode broken role, broken aluminum alloy surface oxide film. Hand arc welding needs DC welding machine, AC arc is not stable enough, need welding rod upright, fast transport, welding rod transport speed is about twice as fast as ordinary carbon steel, in fact, also good operation, is the reaction speed faster. However, the electrode domestic less, and the quality is not ideal, we often use the M505, the quality is still good, is the price is expensive ah!