What type of shielding gases are required by GTAW?

In the context of Gas Tungsten Arc Welding (GTAW), inert shielding gases are essential to the process. These gases, typically argon or helium, provide a protective atmosphere around the welding arc and the molten weld pool. The primary function of these inert gases is to prevent atmospheric contaminants such as oxygen and moisture from coming into contact with the weld area. When carbon dioxide or other reactive gases are introduced, it can lead to defects in the weld such as porosity or oxidation, compromising the overall integrity and quality of the weld.

The use of inert gases ensures that the properties of the base materials are maintained, leading to a clean and strong weld. This requirement reflects the high precision and quality standards associated with GTAW, making the choice of shielding gas a critical factor in achieving successful welds. Thus, the recognition of inert shielding gases as a necessity in the GTAW process reinforces their role in high-quality fabrication and applications in various industries.