Although thorium tungsten electrodes have excellent performance, they also have some disadvantages, mainly including:
Radioactive risk
Thorium is a natural radioactive element, thorium tungsten electrode contains a small amount of thorium oxide (about 2%~4%), which will produce radioactive dust during processing and grinding, long-term exposure may have an impact on human health, and safety protection and environmental protection should be paid attention to when using and disposing.
Environmental protection and safety restrictions
Due to radioactive factors, many countries and regions have strict restrictions on the use, transportation and disposal of thorium tungsten electrodes, increasing management costs and difficulty in use.
The price is higher
The manufacturing process of thorium tungsten electrode is more complex, the raw material cost is higher than that of pure tungsten electrode, and the price is relatively expensive.
Alternative materials appeared
With the improvement of the performance of non-radioactive rare earth tungsten electrodes such as cerium tungsten and lanthanum tungsten, the market share of thorium tungsten electrodes has declined, especially in industries with high environmental protection and safety requirements.
Not suitable for AC soldering
Thorium tungsten electrodes are mainly suitable for DC welding, and their poor performance in AC welding limits their application range.
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