It decomposes or melts when heated, which plays the roles of slag formation, bath protection, alloying and arc stabilization. In addition to the advantages mentioned above, tubular wire arc welding has more metallurgical advantages due to the role of flux in the tube. Tubular wire arc welding can be applied to the welding of most ferrous metal joints. Tubular wire arc welding has been widely used in some industrially advanced countries.

resistance welding

this is a kind of welding method with resistance heat as energy source, including slag electricity.