- Apr 29, 2018-
Oxygen eliminators and nitrogen removal agents
Because nitrogen and oxygen can cause the blowhole metal to cause pores or embrittlement, an oxygen scavenger such as manganese and silicon must be added to the flux. As for the self-shielded flux-cored wire, the flux additionally needs AL as a nitrogen removal agent. The purpose of adding the oxygen scavenger and nitrogen remover above is to clean the filler metal.