Gouging involves the controlled melting of the metal using heat generated by an electric arc or plasma. The operator manipulates the gouging tool over the workpiece, directing the arc or plasma stream to remove material. The depth and width of the gouge can be adjusted based on the desired result.

Welding involves the creation of a molten pool at the joint interface by applying heat generated from an electric arc or other heat sources. The operator then introduces a filler material, if needed, to join the workpieces. The molten metal solidifies, creating a strong bond between the materials.