Nearly all hot dip galvanized steel fabrications involve welding of the steel elements. Occasionally there are defects related to the welding, either aesthetic or structural.
This guide describes the best practice welding of steel that is to be hot dip galvanized, shows some common visual defects in the welded area after galvanizing, and how to successfully weld steel that is already galvanized and repair the damaged areas to restore the corrosion protection.
All structural steel welding should be carried out by qualified professionals to the relevant part of AS/NZS 1554 and be compliant with the requirements of AS/NZS 5131. By following these developed and recommended industry practices, the welded joints and fabricated article will reach the expected quality and durability requirements of the user.