The Importance of the Cleaning Action of the Arc in GTAW Welding

What does the term "cleaning action of the arc" refer to in the GTAW process?

a) Oxide removal while welding.

b) Removing grease & dirt from the weld area before welding is started.

c) Inter pass cleaning of the weld.

d) Dipping the electrode in a chemical solvent to ensure cleanliness before welding.

e) Cleaning the electrode tip periodically.

Answer:

The correct answer is: a) Oxide removal while welding.

The "cleaning action of the arc" in the Gas Tungsten Arc Welding (GTAW) process refers to the removal of oxides and impurities from the metal during the welding process. This process is crucial in preventing corrosion and ensuring a strong weld.

The term "cleaning action of the arc" in the context of the Gas Tungsten Arc Welding (GTAW) process refers to the removal of oxides and impurities from the metal while welding. This cleaning action is vital as it helps in the prevention of corrosion and guarantees the durability of the weld.

During the GTAW process, an electric arc is generated that heats and melts the metal. In addition to joining the metal pieces together, the arc also has a secondary cleaning effect on the metal's surface. The heat and plasma flow generated by the arc help remove surface contaminants like oxides and impurities, ensuring a clean welding environment.

Corrosion is a common issue in metal structures, and preventing it is essential for the longevity of welded joints. The cleaning action of the arc in GTAW plays a significant role in this prevention by eliminating surface oxides that can lead to corrosion over time.

By understanding and utilizing the cleaning action of the arc in GTAW welding, welders can ensure the quality and durability of their welds, making them resistant to corrosion and other forms of deterioration.