Surface imperfection
Surface defects are irregularities on the weld that are visible optically or through inspection methods. They can be scratches, scale defects, or roughness and impair the visual appearance as well as functionality.
Physical-chemical mechanism of action
Surface defects are caused by mechanical influences during the welding process, such as inadequate cleaning or excessive stress levels. They can also be caused by thermal expansion and deformation of the metals.
Metallurgical relevance & welding risks
Surface defects can reduce mechanical strength, impair appearance, and lead to corrosion sites. They can also serve as starting points for further material wear and shorten the life of the weld.
Workshop practice & action items
To minimize surface defects, thorough cleaning of the weld area is essential. Use high-quality protective coatings and appropriate shielding. Ensure correct stress settings and avoid excessive temperatures. After welding, perform a careful surface inspection and remove any defects by roughening or polishing.