Depending on the situation , there are three kinds of welding electrodes classification methods: Classification by welding purposes , according to the main chemical components of drug skin classified , according to drug skin meltedCharacteristics of slag after classification .In accordance with the purpose of welding , there are two forms of expression , one of the original establishment of the Ministry of Machinery Industry , welding can be divided into: structural steel welding rod, Heat-resistant steel electrode, stainless steel welding rod, welding electrodes, low temperature steewelding, Copper Welding Electrodes Cast iron welding rod , nickel and nickel alloy welding rod , copper and copper alloys , aluminum and aluminum alloys and special purpose welding rod . Two as the national standardProvides for the carbon steel electrode , low alloy electrodes, stainless steel welding rod , heap Welding electrodes, cast iron welding rod , copper and copper alloys , aluminum and aluminum alloys . There is no principle difference between the two , the former with a commercial grade , said afterWere expressed by model .If the electrode coating in accordance with the main chemical components to classification, welding can be divided into: titania type electrode , titanium calcium type electrode, ilmeniteMine type electrode , welding rod of iron oxide , cellulose type electrode , low hydrogen typeElectrode, graphite electrode and the base type electrode.If you follow electrode coating melted slag characteristics to classify , welding can be divided into acidic and alkaline welding rod . Acid electrode drug skinMainly composed of acidic oxides such as silica , titania ,Ferric oxide and so on. Alkaline electrode covering the main component of alkaline oxides, such as marble and fluorite .Classification of welding in many ways, by use , respectively , slag basicity , the main component of electrode coating , welding performance characteristics of different anglesFor weldingclassification. By ApplicationChina's current electrode classification is primarily based on national standards and electrode prepared by the Ministry of Machinery Industry " welding material product samples ." Weld Article models according to national standards are divided into eight categories, divided according to purpose electrode grade 10 categories .