Electro Galvanized Wire Coil 0.55mm BWG24 Bright Smooth Surface For Fine Mesh Weaving

Fine wire below 1 mm behaves differently from heavy fencing wire, and an electro galvanized wire coil at 0.55 mm BWG24 is a good example. Electro plating deposits zinc at low temperature from a zinc sulphate or zinc chloride bath, so the wire keeps the smooth, bright, almost polished surface that fine mesh weaving needs; hot dipping the same diameter would build a thicker but lumpier layer that shows through the mesh as irregular texture. Where the application is insect screening, filter cloth, or decorative woven mesh that will be painted or lacquered later, the electro route gives the better surface consistency.

The trade-off is coating thickness. Electro zinc runs 15 - 25 g/m2 against 60 g/m2 and up for hot dip, so this coil belongs indoors or in dry, sheltered service. We are direct about that: if the mesh will sit outdoors in a wet climate, choose hot dipped instead, and we will quote it. For interior screening, filtration and downstream coating, the electro coil is more economical per square metre of finished mesh because it weaves faster and produces fewer surface rejects.

• Bright uniform finish: zinc deposit is even end to end, with no drip marks or zinc nodules that would print through a fine woven pattern.
• Tight gauge for fine weaving: 0.55 mm +/- 0.02 mm, so loom tension stays balanced across the warp beam without constant re-adjustment.
• Good ductility at small diameter: 350 - 480 MPa tensile with adequate elongation keeps the wire from snapping on high speed looms running fine mesh.
• Clean surface for coating: lightly oiled, free of drawing lubricant residue, suitable for powder coating, painting or PVC dip after weaving.
• Small practical coils: 20 - 100 kg coils sized for fine mesh looms rather than for crane handling.
• Cost efficient for interior mesh: delivers the surface quality interior screening needs without paying for zinc mass the application cannot use.

This diameter is the standard warp and weft for aluminium window insect screen, stainless substitute screening, filter discs, and woven mesh used in automotive and appliance filtration. Two practical notes from our weaving customers: first, keep the coil sealed until it goes on the loom, because electro zinc is thin enough that humid storage can start white rust within weeks; second, if the finished product will be PVC coated or painted, specify no oil on the surface and we will supply a dry, degreased version instead of the standard oiled finish. Both options run on the same production line, so switching costs no extra lead time.

Each lot is checked for diameter at three points, coating mass by the gravimetric method, tensile strength and elongation on a universal tester, and surface condition under magnification. We also run a simple weave trial on sample length for repeat customers to confirm the wire feeds cleanly. Documents supplied include the mill test certificate, coating mass report, packing list and certificate of origin. If your end customer requires a specific coating range such as 20 g/m2 minimum, that figure is written into the contract and tested against it, not left to a general standard.

Fine coils are wrapped in PVC film with a moisture barrier layer and packed in cartons or on export pallets, 1 to 1.5 tons per pallet. Because the wire is light, freight is charged on volume rather than weight, and pallet dimensions matter more than coil weight; we standardise on 1100 x 1100 mm pallets unless you ask for another footprint. Lead time is 15 days after deposit for standard sizes, 20 - 25 days for degreased or special coating weights.