A thick, robust outer layer of zinc is what makes galvanized hardware cloth so strong and resilient. How does it acquire this coating? It can be done in a couple of ways: hot-dipping and electrogalvanizing.
Hot-Dipping
1. The stainless steel is cleaned with a sodium hydroxide solution to remove dirt, debris, oil, and other residues.
2. An acidic solution is then used to remove any mill scale, rust, contaminants, and other surface impurities.
3. A zinc ammonium chloride cleaning agent (also known as a "flux") is applied to the surface to prevent oxidation. This solution remains on the steel, as it helps the zinc stick.
4. Next, the stainless steel is dipped into a vat of molten zinc (which has been liquified at an extremely high temperature).
5. The steel remains in the vat until it reaches the same temperature as the hot zinc.
6. After being removed from the vat, the stainless steel is rapidly cooled in a special tank.
Hot-dip galvanizing creates a physical and chemical bond between the steel and the zinc. This is what's called a zinc-steel alloy.
Electrogalvanizing
Unlike hot-dipping, electrogalvanizing is a cold process. Zinc particles are used to create an organic solvent, which is applied to the steel surface.This causes a reaction between the substances, resulting in a zinc-steel alloy. When the solvent evaporates, the zinc remains on the metal. Electrogalvanizing generally leaves a thinner zinc layer than the hot-dipping method.
Galvanized Wire Mesh
Galvanizing Before vs. After Manufacturing Mesh
Stainless steel can be galvanized either before or after it's fabricated into wire mesh. When galvanizing occurs first, the metal is drawn down the desired diameter. The individual metal wires are coated with zinc and then woven or welded into screens. Welding can burn the zinc layer off at the joints, in which case it may need to be galvanized again.
When fabrication comes first, pre-woven steel products are dipped into molten zinc or coated with a solvent. This is usually the more costly option, particularly if mesh products are custom ordered and then galvanized. However, it ensures the mesh screens retain their protective coating.
Industrial Uses for Galvanized Mesh
Due to its notable durability and corrosion-resistance,the galvanized wire usage area is quite wide. It is especially used in different fields such as greenhouse cultivation, protection of agricultural lands, manufacturing of fence wires.
Connect with us for the latest news and insights into how galvanized welded wire mesh panels are being used in your industry.
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