(in lingua inglese)
• Resistance spot welding can be used to produce an acceptable quality of welded joints of steel sheet and closed profile.
• Ultrasonic method allows for non-destructive quality evaluation of welded joints of steel sheet of low thickness with closed profile.
• Studied joints of steel sheet with closed profile presented defects in the form of sticking (no remelting), despite the fact that connected elements did not have coating that protects them from corrosion