Troubleshooting
Why is my flux-core welding porosity?
Quick answer
Porosity in flux-core welding usually means gas shield interrupted — wind, empty bottle, loose fittings, or dirty/oily steel. For this process, store wire dry; check the packet polarity before touching anything else.
The specific fix
Store wire dry; check the packet polarity. The general rule: check gas first: flow, leaks, leaks at the regulator; shelter the arc; clean the joint.
Process checklist
- Wrong polarity — most gasless wire wants DCEN (electrode negative); check the packet
- Dragging the gun like stick — gasless likes a slight drag angle, unlike gas MIG
- Leaving slag-capped wormholes by welding too slow or too hot