Drug skin types: are not already required the type of power supply types: does not require the main features: zirconia, rutile and alkaline type in some of the electrode, these new slag system has yet to form a series. Drug skin type: titanium dioxide supply types: DC or AC main features: contain large amounts of titanium dioxide electrode process performance, stable arc, then arc convenient, splashing a very small penetration depth shallower, slag coverage, de- easy slag, weld ripples special appearance, can all welding electrodes, especially appropriate for sheet metal welding, weld plastic and less crack resistance. With drug skin changes in the amount of potassium, sodium and iron, is divided into the main features of the high titanium potassium type, high-titanium sodium and iron titanium (3) the type of drug skin: a lime-titania type of power: DC or AC : drug skin with titanium dioxide for more than 30 percent calcium, magnesium carbonate, 20%, the electrode process performance, good slag fluidity, and general penetration, arc stability, weld appearance and easy slag detachability, apply to the whole position welding, such as the J422 is guilty of this type is currently the most widely used as a welding rod used in the carbon steel electrode. Drug skin type: ilmenite type of power: DC or AC main features: drug skin containing ilmenite 305, electrode melting fast, good slag fluidity, penetration deep, easy slag detachability, solder wave neat. stable arc, welding, fillet welding process performance is better, lesser vertical welding weld has good crack resistance. Drug skin types: iron oxide type of power: DC or AC main features: drug skin contain large amounts of iron oxide and more the ferromanganese Deoxidizer, deep penetration, melting fast, high welding productivity, stable arc, and then cited convenient arc welding of overhead position welding is more difficult, splash larger weld thermal cracking performance is better, apply to plate welding. Arc force, suitable for field operation. Drug skin by adding a certain amount of iron is the type of iron titanium oxide. Drug skin types: cellulose type of power: DC or AC main features: drug skin containing more than 15 percent organic matter, about 30% titanium dioxide, good welding performance, stable arc, arc blowing force, penetration depth, slag slag detachability. Can be used for vertical down welding rod , forming welding deep penetration or one-side welding. Li, Yang welding process. Applicable to the welding of the sheet structure, fuel tank, pipeline, vehicle shell. Arc stabilization agent with the drug skin content of the binder, divided into high-cellulose sodium (DCRP), two types of high cellulose potassium.