Tungsten color for pure tungsten?

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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 pure tungsten?

Explanation:
Green indicates a pure tungsten electrode (about 99.5% tungsten with no alloying elements). In TIG welding, the color coding helps you identify the electrode type at a glance. Pure tungsten is used mainly for AC welding, such as aluminum, because it helps maintain a stable arc when the polarity reverses and it won’t introduce alloying elements into the weld. It’s not the best choice for DC welding, where electrodes with added elements (like thorium, lanthanum, or cerium) are often preferred for easier starting and longer life.

Green indicates a pure tungsten electrode (about 99.5% tungsten with no alloying elements). In TIG welding, the color coding helps you identify the electrode type at a glance. Pure tungsten is used mainly for AC welding, such as aluminum, because it helps maintain a stable arc when the polarity reverses and it won’t introduce alloying elements into the weld. It’s not the best choice for DC welding, where electrodes with added elements (like thorium, lanthanum, or cerium) are often preferred for easier starting and longer life.

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