What happens if the shielding gas flow rate is too low?

When the shielding gas flow rate is too low, it can lead to contamination and poor weld quality. Shielding gas, typically argon or a mixture of argon and helium, serves the crucial purpose of protecting the weld area from atmospheric gases, primarily oxygen and nitrogen. If the flow rate is inadequate, there will be insufficient coverage over the weld pool. This can result in atmospheric gases infiltrating the weld area, which may lead to defects such as porosity, oxidation, and weak adhesion in the weld bead.

A proper shielding gas flow rate is essential for creating an inert atmosphere that prevents contamination. It ensures that the weld area is adequately protected, allowing for a clean, strong weld. Insufficient gas flow compromises this protective barrier, negatively impacting the quality of the weld and potentially leading to structural weaknesses in the final product. Achieving the right flow rate is crucial for successful Gas Tungsten Arc Welding operations.