arc welding
welding process that is used to join metal to metal by using electricity to create enough heat to melt metal, and the melted metals when cool result in a binding of the metals
gas tungsten arc welding
welding process that uses a non-consumable tungsten electrode
shielded metal arc welding
manual arc welding process that uses a consumable electrode covered with a flux to lay the weld
plasma arc welding
arc welding in which electric arc is formed between an electrode and the workpiece; by positioning the electrode within the body of the torch, the plasma arc is separated from the shielding gas envelope and forced through a fine-bore copper nozzle