TIG and plasma arc welding using thorium tungsten electrode containing 1-1.2 % of thorium oxide , thorium is a radioactive substance , in the welding process and thorium tungsten rod contact with the process, affected by radiation . Radiation acting on the body in two forms : one is external irradiation , the second is to enter the body through the respiratory and digestive systems occur in vivo exposure. From the right TIG and plasma welding mask a lot of investigation and determination proved that they are less harmful radioactivity , because daily consumption of thorium tungsten rods only 100-200 mg dose of radiation is minimal , little effect on the human body . But there are two cases must be noted: First, in the container welding, poor ventilation , dust in the radioactive particles may exceed health standards ; Second, when the grinding and the presence of thorium thorium tungsten rod tungsten rod locations , radioactive aerosols and radioactive dust concentration can reach or exceed health standards. Radioactive substances invade the body can cause chronic radiation sickness , mainly in the general functional state weakened , you can see the obvious debilitating weakness, decreased resistance to infectious diseases , weight loss and other symptoms. < br />
Measures to prevent radiation injury

( 1) Thorium tungsten rod should be a dedicated storage device , a lot of storage should be hidden in a metal box inside , and install the exhaust pipe .

( 2 ) Use of airtight cover welding, the operation should not open the cover , manual operation, the air must wear protective helmets or use other effective measures .

( 3 ) Shall be available exclusively to the grinding wheel thorium tungsten rod , wheel confidential install dust removal equipment, grinder debris on the ground should always be wet wipe and focus deep processing .

( 4 ) Grinding thorium tungsten rod should wear dust masks. After contact with thorium tungsten rod should wash their hands with soap and running water , and wash clothes and gloves .

( 5 ) The selection of appropriate standards welding , to avoid excessive burning thorium tungsten rod .

( 6 ) As far as possible without the use of thorium tungsten rod cerium or lanthanum tungsten rod tungsten rod , because the latter two non-radioactive .


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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 .


Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
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Fake gold actually is often shinier than real gold. Real gold, particularly when it is in nugget form, has a yellow, almost waxy sheen. This sheen will not change regardless of what light it is in. Most types of fake gold may look shinier or duller in different lights, and may appear almost silver at times. Real gold is also malleable, while typical fake gold is hard. Fake gold is also lightweight in most cases, and even plating will not make a piece of fake gold weigh even a seventh of what real gold does in most cases.

Gold plated Tungsten Product Manufacturer & Supplier: Chinatungsten Online - http://paper-weight.cn/
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Zirconia doped tungsten, zirconium tungsten electrodes produce. Specific data as follows:

Other grades dopant doping doping electron work function color coating head

WZ3 ZrO2 0.20 ~ 0.40% <0.20% 2.5 ~ 3.0 Brown
WZ8 ZrO2 0.70 ~ 0.90% <0.20% 2.5 ~ 3.0 White

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

Zirconium tungsten electrodes 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.


Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com;sales@xiamentungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
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