Galvanized steel features a protective zinc coating applied through a process called galvanization. While welding galvanized steel to carbon steel is straightforward due to their shared base material, the zinc coating can present challenges. This layer can cause the weld to pop or create an unstable puddle. For a more secure and sturdy weld, it is recommended to remove the galvanized coating from the specific area you plan to weld.
Certain materials require specific techniques when joining them to galvanized steel. For brass, traditional welding is not recommended; brazing is the preferred method. However, because both materials contain zinc that can release harmful fumes, this process must be performed in a well-ventilated area. Alternatively, consider removing the zinc coating before attempting the bond, or opt for soldering instead.
Aluminum also presents compatibility issues and should not be welded to steel, as it rarely withstands the heat or forms a strong bond. For joining aluminum to galvanized steel, brazing or soldering are the superior options.
Welding galvanized steel follows similar protocols to standard steel welding, requiring careful attention to parameters such as amperage, voltage, travel speed, and travel angle. However, safety is paramount; always operate in a well-ventilated area to avoid hazardous zinc fumes. To enhance gas metal arc welding (GMAW) results, selecting the correct wire-gas combination is critical. Using the proper wire size and type, paired with an appropriate shielding gas, can significantly improve weld quality.
For expert advice on welding or fabricating with galvanized steel, consult the team at Detroit Nipple Works. Whether you need to order materials or require cutting and threading services, simply use our contact form or call us today at 313.872.6370 to request a quote.