Galvanized column

       Galvanized material: zinc

　　Galvanized thickness: 85um on average, not less than 61um at any point

　　Appearance: complete, consistent color, practical and smooth surface, no hanging, dripping tumor, lumps and other defects

　　Impact: no stripping, no bulging, no cracking of zinc layer

　　Bending: no cracks, spalling and other phenomena

　　Zinc layer uniformity: 5 times of copper sulfate immersion does not change red

　　Salt water spray: no corrosion phenomenon