The American Galvanizers Association (AGA) has developed and released an online video series, “Touch-Up and Repair of Hot-Dip Galvanized Steel.” These six short videos detail the specifications and methods used to touch up and repair hot-dip galvanized steel.
The videos provide visual aids to those needing assistance with touch-up and repair of hot-dip galvanized steel, whether in the plant or the field. Topics include proper materials to use while performing the process, as well as specifications to follow, and proper application of the repair materials. Touch-up and repair is important in maintaining hot-dip galvanized steel’s uniform barrier and cathodic protection, which ensures maintenance-free longevity.
The first video in the series introduces the process of touching up and repairing galvanized coatings and the reasons why items may need to be repaired. ASTM A780 - Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings details three acceptable touch-up materials—zinc-based solders, zinc spray metallizing and zinc-rich paints—which are covered in detail in later videos.
The videos are available on the AGA YouTube Channel and Facebook Page.