Galvanized steel is steel that went through the galvanization process which is the process of applying a protective zinc coating. Welding galvanized steel to other steels can be a little tricky at times. Welding galvanized steel to carbon steel is not that hard because both steels are of the same base materials. The only thing that is different is the zinc coating on the galvanized steel. The galvanized layer, may cause the weld to pop or puddle, so it is suggested to remove the galvanization from the part of the steel you plan to weld for a more secure and sturdy weld.
Not all steels or materials should be welded to galvanized steel. One such material is brass, the best way to weld it would be by brazing. Even then, you should do it in a well ventilated area, because the zinc from both can be harmful. Before attempting you should remove the zinc coating from the steel or also considering just soldering the materials.
Aluminum is another material you should not attempt to weld to steel. Most of the time aluminum will not hold up under the heat and rarely makes a good bond. Brazing and soldering would be a better option.
Welding galvanized is done very close to the same way that you would any other steel you are welding. The same process such as; amps, volts, speed and travel are checked/used when welding galvanized. Again, be careful to be in a well ventilated area. Zinc fumes can be hazardous. Wire-gas combinations can help with welding of galvanized steel. The proper wire size and type, along with the most appropriate shielding gas, can improve gas metal arc welding.
Ask the experts at Detroit Nipple Works about welding or fabricating with galvanized steel. Use our contact form and we will answer any question you may have. If you need to order, cut or thread pipe, you can request a quote or give us a call today at 313.872.6370