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+--- Thread: What polarity is used for GTAW aluminum? (/Thread-What-polarity-is-used-for-GTAW-aluminum)
What polarity is used for GTAW aluminum? - 1-LVDCPN - 04-20-2021
Most materials welded by GTAW require direct current with the tungsten electrode negatively charged and the piece to be welded positively charged. This is called straight polarity. In this mode, most of the arc's energy goes into the workpiece, which results in the best weld penetration