Our commercial and structural-grade prepainted galvanized steel coil delivers precise thickness configurations, premium hot-dip zinc coating substrates, and elite multi-layered paint adhesion. Manufactured meticulously under ISO-certified processes since 1994, these color-coated GI coils provide incredible ductility for deep drawing, roll forming, and structural fabrication.
Prepainted Galvanized Steel Coil (PPGI) Manufacturer & Global Exporter
High-Performance Prepainted Galvanized Steel Coils (PPGI) for Global Construction & Manufacturing
Authentic Steel manufactures premium-grade prepainted galvanized steel coils (PPGI) engineered specifically for severe mechanical forming, high-speed roll-forming, and long-term architectural applications. Utilizing high-purity hot-dipped galvanized steel (GI) as the core metallic substrate, our PPGI coils integrate the galvanic corrosion resistance of zinc with advanced multi-layer organic paint systems. Produced at our state-of-the-art facility near Tianjin Port, these color-coated steel sheets provide an economical yet highly durable solution for modern roofing, sandwich panel production, and commercial building enclosures.
Substrate Chemistry & Edge Protection Mechanics
Unlike aluminum-zinc coated alternatives, PPGI relies on a pure zinc metallic layer underneath the topcoat. When the coil is cut, punched, or profiled into corrugated roofing sheets, the exposed zinc layer acts as a sacrificial anode. This metallurgical reaction prevents lateral rust creep under the paint film, effectively sealing cut edges and fastener holes. Combined with a chromate-free chemical conversion layer and a high-adhesion primer, our PPGI coils resist blistering, peeling, and micro-cracking even under acute mechanical bending.
Tailored Paint Formulations for Diverse Climates
To maximize service life across varying global environments, Authentic Steel offers customized topcoat resin chemistries:
Standard Polyester (PE): Delivers excellent flexibility, color variety, and cost efficiency for interior wall partitions, ceiling tiles, and standard residential roofing.
High-Durable Polyester (HDP): Formulated with dense resin structures to provide superior resistance against prolonged UV radiation and color fading in tropical regions.
Silicone Modified Polyester (SMP): Enhances surface hardness and scratch resistance, making it ideal for industrial warehouses and transportation equipment.
Polyvinylidene Fluoride (PVDF): The benchmark for high-rise architectural curtain walls, providing unmatched chemical resistance and gloss retention for over 20 years.
| Parameter Item | Technical Specifications & Range |
| Product Name | Prepainted Galvanized Steel Coil (PPGI) |
| Standard Compliance | ASTM A755, EN 10169, JIS G3312, GB/T 13448 |
| Available Thickness | 0.085mm - 1.4mm |
| Available Width | 900mm - 1250mm (Custom slit width available) |
| Top Coating Layer | 15um - 35um (Primer + Finish coat) |
| Back Coating Layer | 5um - 20um (Epoxy or Polyester backer) |
| Paint Coating Formula | PE, Silicon Modified Polyester (SMP), HDP, PVDF |
| Finish Visual Options | Regular Gloss, High-Gloss, Matte, Wood/Brick Patterns |
Quality Assurance & Strict Testing Standards
Authentic Steel enforces rigorous quality control across every production batch in compliance with JIS G3312, ASTM A755, and EN 10169 standards. Our in-house laboratory verifies key mechanical and chemical parameters before export shipment:
Coating Adhesion & Flexibility: Tested via T-bend procedures (0T to 2T) and cross-hatch tape adhesion to ensure zero paint flaking during roll-forming.
Surface Hardness: Evaluated using pencil hardness scales (≥2H) to prevent transit scratching.
Chemical Endurance: Subjected to 1,000-hour continuous salt spray tests and MEK solvent rub inspections (≥100 double rubs).
Contact our experienced international sales engineers today to request technical data sheets (TDS), mill test certificates (MTC), free color swatch samples, and factory-direct wholesale quotations.
Company Name: Authentic Steel
Email: bella@authsteel.com / bella@wanlusteel.com
Mobile/Tel/Whatsapp: +86 189 2041 0870
