In the metal products trade, galvanized iron wire may seem similar, but due to differences in manufacturing processes and raw materials, products from different suppliers vary significantly in rust prevention periods, flexibility, and lifespan.

        For buyers,choosing low-priced, low-quality wire often means huge maintenance costs later in the project and may even lead to engineering safety risks. To help you select a high-quality supplier, Kewei Metal Mesh's technical experts have summarized five key indicators for verifying the quality of galvanized iron wire.

        Ⅰ. The zinc coating content is seriously misrepresented.

        The zinc coating weight is the sole core indicator determining the corrosion resistance of iron wire.

        • Potential Risk: Many low-priced suppliers may pass off electro-galvanized iron wire as hot-dipped iron wire, or significantly reduce the thickness of the hot-dipped zinc layer.

        • How to Verify: High-quality hot-dipped iron wire typically has a zinc coating weight between $40g/m^2$ and $300g/m^2$.

        • Avoidance Guidelines: It is recommended to request a material quality report (MTC) from a third-party laboratory from the supplier, or to conduct a copper sulfate immersion test (Preece Test) on-site to observe the uniformity of the zinc layer.

        Ⅱ. Surface cracks or zinc layer peeling

        A high-quality galvanized layer should adhere tightly to the steel core like skin, not be a fragile "shell."

        • Potential risk: If the galvanizing process is not properly controlled, the zinc layer can break and peel off when bent or twisted.

        • How to verify: Perform the "wire wrapping test": Wrap a wire tightly around a round rod with a diameter equal to its own.

        • Avoidance guide:Observe the bend for any visible cracks.High-quality wire will remain smooth and undamaged even after multiple wrappings.

        Ⅲ. Tensile strength and flexibility mismatch

        The mechanical properties of galvanized iron wire directly affect its ease of construction.

        • Potential risks: Wire that is too brittle (easily breaks) or too soft (insufficient strength) is usually due to insufficient annealing time or non-compliant raw material steel grade.

        • How to verify:Use a tensile testing machine to test its tensile strength.Generally, binding wire should maintain a strength of 350-550 N/mm².

        Ⅳ. Dimensional tolerances exceed standards

        Consistency in outer diameter is crucial for automated wire mesh production.

        • Potential Risk: Many factories, in order to save materials, will provide products with extremely large negative tolerances (e.g., nominally 2.0mm but actually only 1.85mm).

        • How to Verify: Use a precision micrometer to randomly select multiple points on the head, middle, and tail of a bundle of wire for measurement.

        • Avoidance Guide: The tolerance of high-quality products should be controlled within 0.02mm.

        Ⅴ. Too many solder joints and connectors

        There should not be excessive breaks or manual welds in a single bundle of wire.

        • Potential risk: Too many joints can cause frequent jamming during wire mesh weaving or automated machinery installation,significantly reducing production efficiency.

        • How to verify: Check if the weight of each roll is consistent and observe the wire for obvious signs of manual grinding.

        As a manufacturer with years of export experience, Kewei Metal Mesh insists on using high-quality low-carbon steel raw materials and is equipped with advanced hot-dip galvanizing production lines to ensure that every ton of wire leaving the factory meets international standards.

        [Contact the Kewei technical team now], we can provide you with sample testing and professional quality comparison advice to help you optimize your procurement process.