What polarity is recommended when gas metal arc welding (GMAW) also known as metal inert gas (MIG) welding?

ANSWERED BY PAT | SEPTEMBER 19, 2018

Positive polarity is recommended for GMAW (MIG welding) because two thirds of the current is generated. An exception is when using some flux-cored wires that are formulated for negative polarity; the same goes for some hardfacing wires.