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The role of spangles on the galvanized layer of expanded steel mesh

Mar. 08, 2021

If you have come into contact with the production process of galvanized expanded steel mesh, you should see that the galvanized product will appear golden light flashing phenomenon, how is this done? What impact will this have on expanded metal mesh? Stainless steel expanded metal mesh often wipes metal equipment or places desiccants in precision instruments and adds a small amount of corrosion inhibitors that can slow down the corrosion rate in corrosive media. The standard diamond-shaped expanded metal mesh is strong and has a long service life and is widely used. It is mainly used for civil construction, mechanical equipment protection, handicraft manufacturing, and high-end speaker grilles. Highway guardrail, stadium fence, road green belt protection net, etc.

expanded steel mesh

If the purity of the galvanized layer of the expanded steel mesh is relatively high, spangles will not be formed. In the process of galvanizing steel mesh, when the zinc solution is close to the solidification temperature, if water droplets are sprayed on the surface of the galvanized sheet, some small and uniform crystal nuclei will be formed, which is what we call spangles. The freezing temperature of the zinc solution decreases, the crystal growth time is prolonged, and the spangles become larger.

For expanded metal, the formation of spangles will not have any effect, of course, the appearance of the plate must be more beautiful. However, this is not conducive to the anti-corrosion operation of the steel mesh. If there is no special requirement, it is best to reduce or eliminate the appearance of spangles to ensure the cleanliness and cleanliness of the surface of the steel mesh.

expanded steel mesh

Surface treatment

PVC (plastic coating, plastic coating), hot-dip galvanizing, galvanizing, anodizing (aluminum plate), anti-rust paint, etc.

Anti-rust method

First of all, a number of rare elements and other ingredients have been added to change the internal structure of metal and the normal structure of steel.

2. The metal surface should be covered with a protective layer to isolate the surrounding corrosive medium and prevent the anti-corrosion effect. For example, the surface of the expanded steel mesh is coated with oil, petroleum jelly, paint or enamel, PVC and other corrosion-resistant non-metallic materials; zinc, chromium, and nickel are plated on the surface of the steel plate by methods such as electroplating, hot-dip plating, and spraying; formed on the surface of the steel plate A small and stable oxide film. chemical method. For example, a black Fe3O4 film is formed on the surface of steel parts such as mechanical parts and firearms.

3. Frequently wipe metal equipment or place a desiccant in precision instruments, and add a small amount of corrosion inhibitor to the corrosive medium to slow down the corrosion rate.