Authentic Steel manufactures high zinc coating GI coils with zinc mass ranging from Z275 to Z600 g/m². Engineered for aggressive outdoor environments, coastal construction, and agricultural facilities, our Z275 heavy zinc galvanized steel offers exceptional lifespan and salt-spray resistance.
Steel structures operating in highly corrosive atmospheres—such as coastal facilities, chemical processing plants, solar panel tracking systems, and agricultural livestock framing—require maximum anti-corrosion defense. Authentic Steel produces premium high zinc coating GI coils with heavy zinc deposits ranging from Z275 up to Z600 g/m², ensuring decades of maintenance-free service life in challenging climates.
The mass of the applied zinc coating directly dictates the operational lifespan of protective steel. Our Z275 heavy zinc galvanized steel delivers a dense outer barrier alongside sacrificial anodic protection. Even when severe scratches occur or edges are cut during fabrication, the surrounding zinc sacrifices itself chemically to shield the exposed iron base from atmospheric corrosion.
| Parameter | Specification |
| Zinc Coating | Z275, Z350, Z450, Z600 g/m² |
| Thickness | 0.3mm - 3.5mm |
| Width | 870mm - 1250mm |
| Surface Protection | Chromated, Oiled, Anti-Fingerprint (AFP) |
| Salt Spray Test | Exceeds 1000 hours without red rust |
| Standard | ASTM A653, EN 10346, JIS G3302 |
| Coil Weight | 3 - 15 MT |
Achieving uniform heavy zinc coatings without surface sagging, ripple marks, or rough zinc accumulation demands advanced metallurgical and thermal control. Authentic Steel utilizes continuous hot-dip galavanizing lines equipped with high-precision air-knife wiping systems to achieve exact, balanced coating distribution across the full sheet width. Combined with specialized chromate passivation or environmentally friendly anti-fingerprint treatments, our heavy zinc coils resist chemical degradation, extreme humidity, and severe salt spray exposure.
Every production lot of heavy galvanized steel undergoes rigorous QA verification, including electromagnetic thickness gauge testing, chemical stripping weight checks, and neutral salt spray testing. By selecting Authentic Steel’s heavy zinc coils, project contractors significantly lower lifetime maintenance expenditures and structural failure risks. We offer flexible coil weights and custom slitting options to fit your production lines. Contact our B2B export office today for technical consultations, customized coating specifications, and fast shipping estimates via Tianjin Port.
Contact Information
Email: bella@authsteel.com / bella@wanlusteel.com
Mobile/Tel/WhatsApp: +86 189 2041 0870
