More than a century ago, welders fused two surfaces by melting a metal stick over then using an electric current. Now, that particular stick is called a welding electrode. It is basically a rod that makes the bead of metal thanks to the electric current that come from the welding machine. Mechanics often use this method to repair heavy machinery due to the fact that it’s the simplest and most popular way to weld.
The welding electrode is basically made up of two parts: the actual metal and the flux coating. There are different factors that need to be taken into consideration when choosing the right electrode for each project. Usually, the metal that the electrode is made of is similar to the metal that is being welded.
This means that the metal can vary from mild-steel, stainless steel, cast iron, copper, bronze etc. After the wire of metal is straightened out, it gets wrapped in flux coating. Most often, the coating is a blend of cellulose, Titania, Potassium or Sodium. It gives flexibility and makes the electrical current flow more evenly during the welding process.