What can be a consequence of not cleaning the weld area thoroughly?

Not cleaning the weld area thoroughly can lead to an increased likelihood of defects in the weld. Contaminants such as dirt, grease, paint, or rust can adversely affect the quality of the weld joint. These impurities can prevent proper fusion of the base metals, leading to issues such as lack of penetration, porosity, or inclusions—weak points in the weld that can compromise its integrity. Proper surface preparation is crucial as it ensures that the materials being welded can bond effectively, resulting in a stronger, more reliable weld. Therefore, neglecting to clean the area can significantly undermine the efficacy of the welding process and result in defects that may require rework or lead to structural failures.