Galvanized Before Wire Mesh – Alloy Overview
Galvanized before wire mesh is manufactured by taking galvanized (zinc coated) strands of (usually) low carbon steel wire and weaving or welding them together into wire mesh. This process differs from manufacturing galvanized after wire mesh where the galvanizing process occurs only after the wire mesh has already been woven or welded together. While galv before wire cloth is usually less expensive than galv after, it does not always offer the same level of corrosion resistance: when galvanized before wire is welded together, the protective zinc coating is burnt off, leaving the weld joints exposed and unprotected. When woven together, galv before offers similar levels of corrosion protection as galv after.
The two common processes used to apply the zinc coating to the low carbon steel wire are electrogalvanizing and hot-dip galvanizing. Electrogalvanizing bonds a layer of zinc to the steel via electroplating, while hot-dip galvanizing requires immersing the steel in an ~850°F bath of molten zinc to form the bond. The benefit of the electrogalvanizing process is that it allows for thinner zinc deposits to achieve improved corrosion resistance. The benefit of the hot-dip galvanizing process is that it allows for a zinc coating 5-10 times thicker than the electrogalvanizing process, and thus offers superior corrosion resistance.
Additionally, galv before wire cloth can be protected with epoxy coatings, PVC/vinyl coatings, and our electrostatic application of powder coating. Some characteristics of galvanized before wire cloth which dictate its use are:
- Usually low carbon plain steel alloy.
- Relatively low cost and high strength material.
- Magnetic in all conditions.
- Improved corrosion resistance vs. low carbon steels.
- Shorter lifetime when used outdoors vs. galvanized after wire mesh.
- Protective coatings can be applied to further improve resistance.
- Can be cut, formed, and welded.
Industries & Applications
Galvanized before wire mesh is used across a wide array of various industries and applications due to its relatively low cost, high strength, and good corrosion resistance. Some of the industries and applications which commonly use galvanized before wire cloth include: