What is Arc welding?
[[Image:GMAW.welding.af.ncs.jpg|thumb|200px|right|[[Gas metal arc welding]]]] '''Arc welding''' is the most effective way of permanently joining [[Metal|metals]]. It melts the two metals being joined and fuses them together, effectively turning them into one solid unit. Arc welding uses [[electricity]] to melt the metals and the welding filler by creating an electrical arc. An electrical arc is like a tiny [[lightning bolt]] that passes between two metals, generating intense heat that melts the two metals and the filler material, fusing them together. Commonly used for [[ship]] building in [[World War II|WWII]], this method of welding has become common for creating [[steel]] structures. [[Category:Electricity]] [[Category:Metals]]