If there is any rust on the road, ifthe flux has formed a dry, powdery coating, or ifthe flux has softened, the rodis bad and should not be usedfor anything other than non-critical weldingon mild steel. if welding electrodes absorb moisture on the flux, it cancause bubbles todevelop in the weld.
So please visit this website for more details about welding
Old welding rods for practice?
in Welding/Fab General Discussion
Posted · Edited by Mod34
Commercial link removed
If there is any rust on the road, if the flux has formed a dry, powdery coating, or if the flux has softened, the rod is bad and should not be used for anything other than non-critical welding on mild steel. if welding electrodes absorb moisture on the flux, it can cause bubbles to develop in the weld.
So please visit this website for more details about welding
[commercial link removed]