Overview
The Premium Hot-Dipped PPGI Galvanized Steel Coil is a high-performance metallurgical product engineered for applications demanding a balance of corrosion resistance, formability, and pre-finished aesthetics. Manufactured via continuous hot-dip galvanization (Z60-Z275g zinc coating), the coil features a pre-painted polymer topcoat (polyester, SMP, or PVDF) applied to a low-carbon steel substrate (SPCC/SGCC grades), eliminating the need for on-site painting.
The dual-layer protection system—zinc-rich base for sacrificial corrosion resistance and polymer topcoat for color durability—makes it ideal for large-scale fabrication in construction, appliances, and automotive industries. Available in thicknesses from 0.15mm to 2.5mm and widths up to 1250mm, the coil supports roll-forming, stamping, and cutting with minimal material waste.
Features
Dual-Layer Protection System:
Hot-Dip Galvanized Substrate: Zinc coating (Z60 for indoor, Z275 for coastal) forms a sacrificial barrier, protecting steel even when the surface is scratched or cut.
Pre-Painted Topcoat: Polyester coatings (10-year warranty) for general use; PVDF coatings (20-year warranty) for extreme UV exposure, ensuring long-term color retention in desert/tropical zones.
Industrial-Grade Formability:
Maintains 95% ductility after painting, enabling deep drawing for complex shapes (e.g., automotive fenders, refrigerator door panels) without coating delamination.
Tight thickness tolerance (+/-0.01mm) ensures uniform performance in automated production lines, critical for precision components.
Process Efficiency:
Supplied in large coils (5-20 tons) with optional slitting to custom widths (minimum 300mm), reducing downtime in roll-forming lines by 30%.
Pre-finished surface eliminates post-fabrication painting steps, saving 40%+ in labor and coating costs compared to raw steel.
Global Compliance:
Meets ISO 14682, ASTM A924, and EN 10169 standards, ensuring consistency for international projects (e.g., EU infrastructure, Southeast Asian factories).
Low-VOC coatings comply with California’s CARB II regulations, safe for use in residential and educational buildings.
Application
Construction Industry: Manufactures roof trusses, wall cladding, and steel frames for prefab homes (e.g., modular housing in Japan) and industrial sheds (e.g., Amazon fulfillment centers).
Home Appliances: Forms panels for refrigerators (e.g., Samsung’s stainless steel-look finishes), washing machines, and air conditioners, resisting kitchen grease and laundry chemicals.
Automotive Components: Produces truck bodies (e.g., Volvo semi-trailers), trailer skins, and interior brackets, with Z275 coating protecting against road salt in Northern Europe/Canada.
General Fabrication: Ideal for metal furniture (e.g., IKEA storage solutions), signage, and HVAC ductwork, offering a cost-effective balance of durability and aesthetics.
FAQ
Q: How do I choose between SMP and PVDF topcoats?
A: SMP (silicone-modified polyester) is suitable for industrial environments with mild chemical exposure; PVDF is recommended for coastal/desert regions requiring maximum UV resistance.
Q: Can the coil be used in direct contact with concrete?
A: Yes, but apply a bituminous primer to protect cut edges from alkaline corrosion, especially for foundation piles and retaining walls.
Q: What is the typical lifespan in a coastal industrial area?
A: Z275 with PVDF coating lasts 15-20 years; regular cleaning to remove industrial soot can extend service life by 25%.
Q: Does the factory offer color matching for corporate logos?
A: Yes, we provide Pantone/RAL color matching with a ΔE ≤1.0 tolerance, ideal for brand-compliant commercial projects (e.g., McDonald’s restaurant roofing).
