Drug skin contains large amounts of acidic oxide Welding Rods. Acid Welding Rods coating, including five types: high-type titanium dioxide, titanium dioxide calcium-type, ilmenite, iron oxide and cellulose. The content of multi-drug skin acidic oxides (such as SiO2, TiO2, etc.), electrode welding process performance, such as stable arc, easy slag detachability, beautiful appearance, splash rarely suitable for AC, DC two power supplies. Such Welding Rods are often used for capping and other decorative parts of the welding. The shortcomings of the acid electrode weld diffusible hydrogen content is high, the crack resistance is poor, not suitable for the welding of rigid parts and thick structure. In addition, because of its lower weld toughness, not suitable for welding to withstand dynamic load or low temperatures the structure. With the improvement of alkaline oxides in the drug skin weld toughness has been improved weld toughness of titanium dioxide calcium electrode and the ilmenite-type electrode is higher than the high titania type electrode can be used for more important parts of the welding. Higher weld toughness of cellulose type electrode welding of pipeline steel of various strength levels, particularly suitable for the underlying downward vertical welding and pipe welding.