The arc welding is most known of the processes of welding.

When one approaches the electrode coated with the parts to assemble, it creates for itself a Electric arc which releases a strong heating capacity which causes the fusion of the electrode.

The coated electrode consists of a metal heart and a Enrobage. The metal heart is the filler deposited to assemble the parts. Coating can be various types (rutile, more used, acid, basic, cellulose, oxidant, high-output) and with various roles:

• Electric: better ionization which improves the stability of the arc;
• Metallurgical: gas atmosphere, the crater protects the bath from fusion, the dairy protects from the Oxydation, of the effect of Trempe, evacuates captive gases, is used as heat insulator, coating can bring elements of additions modifying the properties mechanics (Chrome, Nickel Manganèse…).
• Mechanical: the Cratère avoids joining; the slag maintains fused metal.

External bonds

• Soudeur.com: The French-speaking site gate of the welder, the welding and welding