Galvanized steel is very resistant to rust, but welding removes the protective galvanized coating.  So all welds should be post-weld treated to address this.  When welding any of our galvanized products, we go through a labor-intensive process to re-introduce the galvanization after welding. We are not aware of another manufacturer that goes to the effort we do in this regard. We clean every weld by hand. Then we wire brush every weld to remove any slag. We then brush a zinc rich compound on the weld. Again, by hand. And then we top it off with a coat of cold galvanization and then finally a coat of bright rust resistant paint. The end result of this four step process is a product worthy of the Martin Ranch Supply name and one that is protected from the elements for many years to come.