Which of the following is not a characteristic of thoriated tungsten electrodes?

When considering the characteristics of thoriated tungsten electrodes, it's important to recognize that these electrodes are indeed known for their superior performance attributes, particularly in terms of arc stability, a higher melting point, and their versatility for both AC and DC welding applications.

Thoriated tungsten electrodes have a better arc stability due to the addition of thorium, which enhances the emission of electrons and contributes to a more stable and concentrated arc. This characteristic is vital for achieving high-quality welds, especially in delicate or intricate applications where precision is crucial.

In addition, these electrodes possess a higher melting point compared to pure tungsten, making them suitable for high-temperature welding applications where durability and performance are essential. This higher melting point reduces the risk of electrode degradation during the welding process.

Furthermore, thoriated tungsten electrodes can be used for both alternating current (AC) and direct current (DC) welding processes. This versatility allows welders to utilize them in a broader range of applications, from aluminum to stainless steel, enhancing their appeal in various welding scenarios.

On the other hand, thoriated tungsten electrodes are generally more expensive compared to pure tungsten electrodes due to the added thorium and the manufacturing processes involved. However, this cost often reflects the enhanced performance and benefits they provide