What is the difference between galvanized before or galvanized after welding?
The following information was taken from a post written by Jim Moore to the NaturalBird list: Any metal that has iron in it rusts. Zinc does not rust. About 150 years ago when this was realized, someone came up with the idea of coating iron and steel (which is iron with other metals added and which also rusts) with zinc. The process is simple as zinc melts at about 780 degrees, whereas iron and steel melt at temperatures above 2000 degrees. So the iron or steel product is dipped in a bath of molten zinc which leaves it coated and prevents it from rusting. Now as to the problem of galvanized before and galvanized after welding: Mesh is made from individual strands of wire which run perpendicular to each other and which are welded together. Now to get the wire to weld together the joint of the wires must be heated to around 2500 degrees to cause the metal to become molten enough to fuse together. If the wire strands are galvanized before they are welded then the zinc coating at the welds
