Manual arc welding is one of the earliest and most widely used welding methods in various arc welding methods. It is an electrode coated with an external electrode and a filler metal. The arc is burned between the end of the electrode and the surface of the workpiece being welded.

On the one hand, the coating can generate gas to protect the arc under the action of arc heat, and on the other hand, it can produce slag covering the surface of the molten pool to prevent the interaction of the molten metal with the surrounding gas. The more important role of slag is to produce a physicochemical reaction with molten metal or to add alloying elements to improve weld metal properties.

The hand arc welding equipment is simple, light and flexible. It can be applied to the welding of short seams in maintenance and assembly, especially for welding in hard-to-reach areas. Hand arc welding with the corresponding electrode can be applied to most industrial carbon steel, stainless steel, cast iron, copper, aluminum, nickel and their alloys.