Slag inclusion is the welding defect caused by ___________________.

Explanation:

Slag inclusion: 

• Slag Inclusions are a common welding defect that occurs when slag a welding byproduct gets stuck inside the weldment. This is an unfavorable condition that creates performance issues down the line. In most cases it is a result of bad welding techniques or improper selection of components and parameters.

• These slag inclusions frequently appear at the edges of a weld if the correct welding procedure is not used.

• The molten slag being lighter than the weld metal rises to the surface of the liquid pool rapidly forming a blanket that covers the metal. Furthermore the slag solidifies at a lower temperature than the metal. Thus when an edge is not completely filled with metal and has a drooping contour the slag blanket slips around this contour and settles in the corner. When the metal solidifies more slag will settle in the edge to form a tightly adhering inclusion.

Main Causes Of Slag Inclusions: 

• Type Of Flux Used
• Welding Parameters
• Poor Welding Technique
• Bad Practices