What is Air Arc Gouging

Air arc gouging (also known as air carbon arc gouging) is a metal removal process that uses an electric arc and a stream of compressed air to melt and remove metal from a workpiece. It’s commonly used in welding, fabrication, and repair work to gouge out defective welds, prepare surfaces for welding, or remove unwanted material.

How It Works:

1. Electrode: A carbon-graphite electrode is used to create an electric arc between the electrode and the metal surface.
2. Arc Heat: The arc generates extreme heat, melting the metal.
3. Compressed Air: A high-velocity jet of compressed air blows away the molten metal, creating a groove.

Key Features:

• Versatile: Can be used on various metals, including steel, stainless steel, and cast iron.
• Efficient: Removes metal quickly without excessive grinding.
• Common Applications:
  • Removing old welds
  • Preparing joints for welding
  • Cutting out defects
  • Creating grooves for rewelding

Equipment Required:

• A DC welding power source (usually constant current)
• Carbon-graphite electrodes (often copper-coated)
• Compressed air supply (minimum 80 psi, depending on the job)
• Personal protective equipment (PPE) due to sparks and metal splatter

Advantages Over Other Methods:

• Far faster and smoother than grinding
• More precise than oxy-fuel cutting for gouging applications
• Can be used in various positions (flat, vertical, overhead)

Would you like details on specific applications or best practices?