Galvanized square tube

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, lumping 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