What effect does inadequate joint cleaning have on GTAW?

Inadequate joint cleaning can significantly impair the quality of a weld in Gas Tungsten Arc Welding (GTAW). Proper cleaning of the joint is essential to remove any contaminants such as grease, oil, dirt, or oxidation. When these contaminants are present, they can lead to the formation of defects within the weld, including porosity, lack of fusion, and inclusions. These defects compromise the structural integrity of the weld and may lead to failure during service. Additionally, contaminants can also interfere with the shielding gas, which is crucial for protecting the molten weld pool from atmospheric contamination.

Since cleaning is vital for achieving a strong and reliable weld, not performing it adequately results in poor quality outcomes, confirming why this choice accurately reflects the impact of inadequate joint cleaning in the GTAW process.