Assertion: electrode | /r/Causes | weld-protecting slag
Facets:
value: to form
type: OTHER
Source sentences:
text: The electrode is coated in a metal mixture called flux, which gives off gases as it decomposes to prevent weld contamination, introduces deoxidizers to purify the weld, causes weld-protecting slag to form, improves the arc stability, and provides alloying elements to improve the weld quality.