The free shipping 230A gasoline powered welding machine usually does not conduct electricity due to gas, but under certain electric fields and temperatures, the gas can dissociate and conduct electricity. Welding arc generation process: electrode in contact with workpiece; Short circuit occurs, with a large short-circuit current present; A large amount of heat is generated at the contact point; Electrode end, workpiece heating up→ Generate high-temperature gases (high-temperature air, metal and coating vapors)→ Electrode lifting→ Forming an electric field→ Electronic directional motion→ High temperature gas ionization (electrons and cations)→ Charged particle motion, collision and recombination; Generate a large amount of heat and arc light (i.e. arc).