Composite tungsten electrodes are increasingly being used for TIG welding because of their superior performance and durability compared to pure tungsten electrodes. These Tungsten electrodes are created by adding other materials such as thorium, cerium, or zirconium to tungsten to enhance its properties.
The application of composite tungsten electrodes has several benefits. Firstly, they offer better arc stability and a cleaner weld due to reduced tungsten spitting. Secondly, they have a longer lifespan, which reduces the time and cost associated with frequent electrode replacement. Thirdly, they can be used for welding a wide range of materials, including aluminum, steel, nickel, and titanium.
The use of thoriated tungsten electrodes, which contain thorium oxide, has been phased out in many countries due to safety concerns. The use of composite tungsten electrodes that contain cerium or zirconium oxide is now more common. Ceriated tungsten electrodes are popular for welding aluminum because they offer superior arc starts and better arc stability, while zirconiated tungsten electrodes are ideal for welding stainless steel because they resist tungsten contamination and maintain a sharp tip.
Overall, the application of composite tungsten electrodes has brought about significant improvements in TIG welding, including better performance, durability, and cost-effectiveness.
