What approximate heat distribution does Alternating Current (AC) provide in GTAW?

Study for the Gas Tungsten Arc Welding Test. Practice with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

In Gas Tungsten Arc Welding (GTAW) using Alternating Current (AC), the heat distribution is approximately equal between the workpiece and the electrode, leading to a balance of 50% heat to the work and 50% to the electrode. This is significant because AC welding allows for the welding of aluminum and magnesium, which are more reactive materials that benefit from the cleaning action of the AC cycle. The alternating current alternately reverses the polarity, which effectively allows the electrode to clean the oxide layer off the surface of the workpiece during the positive cycle while also transferring a significant amount of heat during both cycles. This balanced heat distribution helps in achieving effective penetration and fusion while minimizing electrode wear, which is crucial in maintaining the integrity and quality of the weld.

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