Although the hot-dip galvanized coating is very resistant to damage, small voids or defects in the coating can occur during the galvanizing process or due to improper handling of the steel after galvanizing. Touch-up and repair of galvanized steel is simple whether newly galvanized or in service for years.
The practice is the same, but there are more restrictions to the allowable repairs on a new product than one that has been in service. These six short videos detail the specifications and methods used to touch-up and repair hot-dip galvanized steel.
The videos provide highly beneficial visual aids to those needing assistance with touch-up and repair, 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.
Watch the Videos. The main restriction in the specification for repairing newly galvanized material is the size of the area which is outlined in the product galvanizing specifications:. When it comes to repairing galvanized steel in the field, there is no limitation to the size that can be repaired.
The zinc coating is difficult to damage, and field fabrication that requires removal of the coating should be minimized as much as possible. As noted before, the cathodic protection of the coating will provide some protection to uncoated areas, but the best practice for longevity is to touch-up any bare areas.
A listing of various manufacturers and products for the maintenance and repair of hot-dip galvanized structures is available for download. The specification explains how to use the various repair methods as well as the required coating thickness for the repaired area. Touch-up materials are required to meet a coating thickness of at least 2.
ASTM A contains three acceptable methods of touch-up and repair of hot-dip galvanized steel:. Soldering is done with zinc-based alloys in either a stick or powder form. Click on any event in the list for more details. You can also reach out to content patch. Scientists search your sewage for clues. Bad luck: Pope acknowledges he got caught at record store. Microsoft and partners may be compensated if you purchase something through recommended links in this article.
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