Welding Galvanised Iron. When welding galvanized steel the surface of groove and the edge of the zinc layer under the action of arc heat oxidation melting and evaporation of white smoke and steam easily lead to weld porosity. They were made from galvanized sheet metal and we didnt clean crap.
Most welders will at some point in their career perform a weld on galvanized steel and encounter galvanize poisoning or metal fume fever Galvanize poisoning is a short-term reaction to overexposure of zinc oxide 1. The best way to weld galvanized steel regardless of welding process is to remove the zinc coating from the joint. The zinc coating found on galvanized steels can compromise the weld.
Galvanizing is simply coating of zinc over steel.
Structure of the coating formed by the interdiffusion of zinc and iron provides good adhesion to the steel and because the intermetallic layers are very hard it also provides good abrasion resistance. Aluminium Mild Steel Galvanized Iron GI Electro-galvanized Cutting Bending Rolling MIG Welding Argon Welding. The coating makes penetration more difficult and can cause a weld to have inclusions and porosity. Can you weld galvanized steel.