Welded Mesh Galvanized Wire Coil 1.2mm BWG18 Uniform Zinc Coating For Panel Production

Welded mesh production exposes wire to something fencing does not: resistance welding. The current passes through the crossing point, melts a small volume of steel, and any inconsistency in coating thickness or surface contamination turns into a weak weld or a spatter mark that fails inspection. A 1.2 mm BWG18 galvanized wire coil for panel production therefore needs a coating that is uniform in mass, consistent in surface chemistry, and free of excess oil, plus a tensile range that keeps electrode wear predictable across a long run.

We hold this coil at 50 - 70 g/m2 with a tolerance band measured every production hour, and we supply it lightly oiled to a controlled film weight rather than heavily oiled for storage. If your line runs without a pre-weld cleaning step, tell us and we will supply a low residue finish instead.

• Uniform coating for stable welding: 50 - 70 g/m2 held in a narrow band, so weld current settings do not need constant adjustment through the shift.
• Controlled oil film: light, measured oil instead of heavy storage oil, reducing spatter and weld porosity on lines without an inline degreaser.
• Tensile matched to electrode life: 400 - 520 MPa keeps electrode pressure and wear inside a predictable range.
• Roundness and straightness: gauge held at 1.2 mm +/- 0.03 mm with low cast, so panels come off the line flat instead of with a curl.
• Coil format for mesh lines: 100 - 250 kg coils sized for standard mesh line dereelers, with layer winding to avoid payoff snags.
• Consistent spangle: visually uniform finish so galvanized panels match across a production batch and across repeat orders.

Panel makers usually run two wire sizes on the same line, one for the mesh field and one for the edge trims, and mixing coils from different lots in one shift is the most common cause of inconsistent weld quality. We recommend keeping lot numbers intact per run and marking them clearly on arrival. Where the finished panel is powder coated, ask for the dry degreased version rather than oiled, because residual oil outgasses in the coating oven and shows as pinholes in the powder film. Where the panel is hot dip galvanized after welding, a lighter 30 - 40 g/m2 coating is enough and saves cost, since the final zinc layer comes from the post-weld dip.

Each lot is tested for diameter, coating mass, tensile, elongation and surface oil film weight, plus a weld trial on a sample panel for repeat buyers to confirm that current settings hold. Coils are visually inspected for bare spots, zinc lumps and cross-over winding. We keep retained samples of every lot for twelve months so any field complaint can be checked against the actual wire supplied. Documents include mill test certificate, coating report, oil film record, packing list and certificate of origin.

Coils are wrapped in VCI paper and plastic film, secured on pallets or in bundles with steel straps, and labelled with gauge, coating mass, lot number and net weight. A 20 foot container carries about 25 tons. Lead time is 15 days after deposit for standard finish and 20 days for low residue or dry degreased finish. Third party inspection can be arranged before loading, and shipping documents are prepared for T/T or L/C at sight settlement.