usage field: arc welding in inert gases atmosphere, and ion welding, cutting, spray, manufacture electrodes. character: high melting point, stability in arc, no wastage. the electrodes can last even longer when put tho2, ceo2 into pure tungsten. it also no pollution to welding slots. it will increase the ability of electronic spray and make the welding part more perfect. quality of surface: clean, net, no crack, slot, flake, no oil pollution and other impurity. pure tungsten electrodes can has following character: steam press low, low resistance, good electricity and low expand.