Introduction to Carbon Arc Welding

Carbon arc welding (CAW) is one of the oldest welding methods. It uses an arc between a carbon electrode and the workpiece to melt metals and create a strong joint.

Unlike other methods, CAW doesn't require a filler material. The intense heat from the carbon arc effortlessly melts the workpiece's edges to form a weld.

The non-consumable carbon electrodes in CAW are made of graphite and can withstand the high temperatures without melting, focusing the arc effectively.

CAW is typically performed with a direct current (DC) power supply, which provides better control over the arc and reduces spatter compared to alternating current (AC).

CAW's advantages include minimal equipment requirements, portability, and the ability to weld metals like copper and zinc alloys that are difficult with other methods.

Despite its benefits, CAW has declined in popularity due to the intense UV radiation it emits, requiring stringent safety measures to protect welders' eyes and skin.

Today, CAW is mainly used for repairing cast iron, maintaining heavy machinery, and in some artistic metalworking due to its ability to create unique textures and finishes.