Materials
Can you tig welding galvanised steel?
Quick answer
Yes — yes on cleaned zones; fume caution. TIG on galvanised steel: flux-core or stick 6013/7018 on it, MIG if you grind the coating back; filler same as mild steel; silicon-rich wires handle zinc slightly better.
The verdict and why
Yes on cleaned zones; fume caution. Zinc fume causes metal fume fever ('welders' flu') — ventilation or a fresh-air mask is non-negotiable under AS 1674
Watch-outs
- grind the gal off the weld zone where you can — it's faster than fighting porosity
- Prep: grind the gal off the weld zone where you can — it's faster than fighting porosity