Galvanized Steel Sheet

镀锌钢板（GI钢板）产品介绍

Product Overview 产品概述

Galvanized steel coil, also known as GI, is produced by adopting the hot-dip galvanizing process to form a uniform, dense high-purity zinc protective layer on the surface of high-quality cold-rolled or hot-rolled steel substrate. Based on the sacrificial anode protection principle of the zinc coating, it isolates air and moisture from the steel substrate to fundamentally prevent rust and corrosion.

Core Advantages 核心优势

• Excellent anti-corrosion & durability: the hot-dip galvanized layer has a compact structure with good resistance to acid, alkali, wind and rain; service life reaches 20–30 years outdoors;
• Stable surface performance: free of uncoated spots, scratches and zinc nodules, with good bending, stamping and welding workability;
• Wide compatibility: can be used directly, or serve as the substrate for prepainted galvanized steel (PPGI) with excellent paint adhesion;
• Full range of customizable specifications: thickness, width, zinc coating weight and spangle pattern all on request, with regular spangle, minimal spangle and fingerprint-resistant options;
• High cost performance: lower overall cost than stainless steel and spray-coated sheets, stable performance, ideal for large-scale bulk engineering use.

• Main grades: DX51D, DX52D, DX53D, SGCC, SPCC and other Chinese, ASTM and EN grades
• Thickness range: 0.11mm–4.0mm
• Width options: 1000, 1200, 1250, 1500mm in regular; custom cut lengths available
• Zinc coating weight: 30g/m2–275g/m2 customizable
• Surface treatment: regular spangle, minimal spangle, fingerprint-resistant passivation, anti-rust oiling
• Standards: GB/T, ASTM, EN. Third-party inspection acceptable; mill test reports and certificates provided.

• Construction: roofing, wall cladding, steel structure, ceiling, ventilation ducts, waterproof base layers
• Home appliances & hardware: back panels for refrigerators, washing machines and air conditioners, stamped hardware parts, racks and cabinets
• Industrial manufacturing: equipment enclosures, guard plates, cable trays, pipe cladding, machinery components
• Deep-processing substrate: high-quality base material for prepainted and printed steel sheets, used for color steel tiles and decorative panels
•  

Products are packed with standard export packaging: surface covered with protective film, coil edges reinforced with edge protectors, wrapped with multi-layer waterproof film and firmly bundled, preventing scratches, dents, moisture and deformation during transit. We supply full coils, cut-to-length sheets and slit strips.

We strictly control workmanship and zinc coating quality and conduct sampling inspection on appearance, performance and thickness for each batch. Custom specifications, free samples and order tracking are supported, with comprehensive pre-sales guidance and after-sales warranty service.