Arc Gouging
Arc gouging is a thermal cutting process that uses an electric arc to melt metal, combined with a high-velocity stream of compressed air to remove the molten material. It is widely used for preparing weld joints, removing defective welds, and quickly and effectively shaping or repairing metal components.
In more technical detail, arc gouging works by establishing an arc between a carbon electrode and the workpiece. The heat generated melts the surface of the metal, while a jet of compressed air blows away the molten material, creating a clean groove. Unlike mechanical cutting methods, arc gouging provides speed, flexibility, and the ability to handle a wide range of ferrous and non-ferrous metals. It is commonly used in heavy fabrication, shipbuilding, structural steelwork, and equipment repair.
Key characteristics include the ability to cut or remove material without introducing excessive mechanical stress, control over groove depth and profile, and compatibility with both AC and DC power sources, depending on the electrode type. Proper technique, torch angle, and air pressure are critical for achieving consistent results and maintaining electrode life.
Highlights
Thermal process using an electric arc with compressed air to remove molten metal
Creates clean grooves for weld preparation, repair, or modification
Works on a wide range of metals, including carbon steel, stainless steel, and cast iron
Offers high material removal rates compared to mechanical methods
Provides controlled groove depth and width for precision applications
Common in heavy industry, fabrication, and maintenance operations
