Zirconium and Zirconium Tungsten Electrode

Zr (Zirconium) is a chemical element , its chemical symbol is Zr, its atomic number is 40 , is a silvery white metal of high melting point , pale gray. Density of 6.49 g / cm 3 . Melting point 1852 ± 2 ℃, boiling point 4377 ℃. Valence of +2, +3 and +4 . The first ionization energy of 6.84 eV. Easy to form a surface layer of zirconium oxide film having a gloss similar to the appearance and steel . Corrosion -resistant , can be dissolved in hydrofluoric acid and aqua regia ; high temperature , can be used with non-metallic elements and many metal elements react to form a solid solution compound.

Zirconium tungsten electrodes pure tungsten electrode in order to improve the welding conditions at high load melt easily contaminated workpiece itself and the development of an electrode variety drawbacks , the greatest feature of the electrode is at high load currents , the ends of such an electrode can be maintained a spherical tungsten reduced infiltration phenomenon , and has good corrosion resistance .

Zirconium tungsten electrodes and pure tungsten electrodes , can only be of the AC welding work environment .

Zirconium tungsten electrode in AC environment, good weldability . Especially in the case of high load currents , zirconium tungsten electrodes shown superior performance of the other electrode can not be replaced .

In welding, the end portion of the tungsten electrode of zirconium to maintain a reduced spherical tungsten infiltration phenomenon , and has good corrosion resistance .

Since the emergence of other alternative products , zirconium tungsten electrode demand will have a decreasing trend . Main alternative product is lanthanum tungsten electrode .


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