gouging Plasma arc surfacing Plasma arc spraying Plasma arc cutting When used for cutting, the plasma gas flow is increased so that the deeply penetrating plasma jet cuts through the material and molten material is removed as cutting dross. PAC differs from oxy-fuel cutting in that the plasma process operates by using the arc to melt the metal whereas in the oxy-fuel process, the oxygen oxidizes the metal and the heat from the exothermic reaction melts the metal. Unlike oxy-fuel cutting, the PAC process can be applied to cutting metals which form refractory oxides such as stainless steel, cast iron, aluminum and other non-ferrous alloys. Since PAC was introduced by Praxair Inc. at the American Welding Society show in 1954, many process refinements, gas developments, and equipment improvements have occurred. References Bibliography Further reading American Welding Society, Welding Handbook, Volume 2 (8th Ed.) External links Plasma Arc Welding http://mewelding.com/plasma-arc-welding-paw/ Microplasma welding https://www.youtube.com/watch?v=T8g1lULZryk https://www.youtube.com/user/multiplazslovenia#p/u/6/SWbUJh4XuMQ Arc spray welding https://www.youtube.com/watch?v=BtsywbmjKIE&NR=1 https://www.youtube.com/watch?v=ibPPbQC5LeE Arc welding Plasma processing