Tungsten color for 2% thoriated?

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Enhance your TIG welding skills with the Nebraska GTAW FFA TIG Welding Exam. This exam features multiple choice questions and realistic scenarios to prepare you for success in TIG welding.

Multiple Choice

Tungsten color for 2% thoriated?

Explanation:
Tungsten electrode color codes identify the alloying elements in the tip. For a 2% thoriated tungsten, the color is red. Thorium oxide dopes the tungsten to improve electron emission and arc starting, making it reliable for DC welding of steels and stainless. Keep in mind the radioactivity concerns with thorium, which is why many welders choose alternatives for certain applications. Other colors map to different tungsten types (green for pure tungsten, gray for ceriated, blue for lanthanated), but red specifically signals 2% thoriated.

Tungsten electrode color codes identify the alloying elements in the tip. For a 2% thoriated tungsten, the color is red. Thorium oxide dopes the tungsten to improve electron emission and arc starting, making it reliable for DC welding of steels and stainless. Keep in mind the radioactivity concerns with thorium, which is why many welders choose alternatives for certain applications. Other colors map to different tungsten types (green for pure tungsten, gray for ceriated, blue for lanthanated), but red specifically signals 2% thoriated.

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