What is the substance on the outside of the electrode?
1, welding electrode is divided into acidic and alkaline electrode. Acidic oxide as the main component of acid coating, such as silica, titanium dioxide, ferric oxide. Alkaline oxide as the main component of alkaline electrode, such as marble, fluorite and so on. The role is to protect the welding process is not oxidized, produce a lot of heat welding in the process of2, the electrode (coveredelectrode), is the metal coating in the welding core (coating), uniform centripetal pressure applied to core. The core metal cored electrode, in order to ensure the quality and performance of the weld, there are strict rules on the contents of metal elements in the core, especially for harmful impurities (such as sulfur, phosphorus content, etc.) should be strictly restricted, better than the base metal. The electrode consists of two cores and coating composition. The different cores are also different. The core components directly affect the composition and properties of the weld metal, so the harmful elements in the welding core to as little as possible.
I think that is a layer of insulation, to prevent leakage of electrode and temperature is too high, resulting in melting of the electrode.
The electrode coating consists of various minerals, such as iron alloy, organic substance, water glass and other raw materials.Composition of electrode according to their different functions can be divided into arc stabilizing agent, fluxing agent, gas forming agent, deoxidizing agent and alloy slag agent, dilute agent and binder etc..
