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Prepainted Galvanized Steel Coil Price

Superior Corrosion Resistance: High-quality galvanized, galvalume, and zinc-aluminum-magnesium substrates (30–275 g/m²) provide long-lasting durability, suitable for coastal, industrial, and high-pollution environments.

High-Performance Coating Systems: Multiple coating options—PE, HDP, SMP, PVDF, PU, and PRO series—offer excellent weather resistance, color retention, and chemical resistance, with coating thickness up to 100 μm.

Strong Formability & Aesthetic Appeal: Smooth surfaces, rich colors, and excellent bending/forming performance make the material ideal for roofing, wall cladding, and home appliance applications.

Reliable Quality & Full-Service Support: Products meet GB/T 12754-2019 standards and are backed by nationwide service centers, regular customer visits, and efficient after-sales support.

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Product Details

Product Introduction

Prepainted Galvanized Steel Coil are typically made by applying a certain thickness of coating or bonding an organic film onto surfaces such as galvanized steel sheets, non-patterned galvanized steel sheets, aluminum-zinc coated steel sheets, or zinc-aluminum-magnesium coated steel sheets after surface treatment. These sheets are then cured and formed into "color coated sheets," which exhibit excellent corrosion resistance, formability, and decorative appeal. They are widely used in industries such as construction, home appliances, light industry, and transportation, making them an ideal composite material.

Product Parameters

Coating Type	Recommended Substrate	Coating Thickness (μm)	MEK	T-Bend	5% HCl	5% NaOH	Neutral Salt Spray	QUV-A	Service Life
Polyester (PE)	Z/AZ/ZM	≥20	≥200 rubs	3T	24 hours	24 hours	1000 hours	1000 hours	10 years
High Durability Polyester (HDP)	Z/AZ/ZM	≥23	≥200 rubs	3T	24 hours	24 hours	1500 hours	1500 hours	15 years
Silicone Modified Polyester (SMP)	Z/AZ/ZM	≥23	≥200 rubs	3T	24 hours	24 hours	1500 hours	1500 hours	15 years
Polyvinylidene Fluoride (PVDF)	Z/AZ/ZM	≥25	≥300 rubs	2T	24 hours	24 hours	2000 hours	3000 hours	20-30 years
Polyurethane (PU)	Z/AZ/ZM	≥40	≥100 rubs	2T	24 hours	24 hours	720 hours	1000 hours	10-20 years
Cold Lamination	Z/AZ/ZM	≥100	/	0T	360 hours	/	/	/	10 years
Color Print	Z/AZ/ZM	≥25	≥100 rubs	3T	24 hours	24 hours	600 hours	1000 hours	10 years
Texture/Suede Finish	Z/AZ/ZM	≥25	≥100 rubs	2T	24 hours	24 hours	1000 hours	1000 hours	10 years
High Corrosion Resistant Polyester (PE.PRO)	Z/AZ/ZM	≥25	≥1000 rubs	3T	120 hours	120 hours	2000 hours	2000 hours	15 years
High Corrosion & Weather Resistant Polyester (HDP.PRO)	Z/AZ/ZM	≥25	≥1000 rubs	3T	120 hours	120 hours	2500 hours	3000 hours	20 years

Types of Color Coated Substrate

Galvanized Substrate

Xinghan Coating & Galvanizing galvanized sheets are divided into spangled and non-spangled sheets. All color coating substrate raw materials are supplied by Xinghan's own galvanizing production lines, meeting the color coating needs for both export and domestic supply. The double-side coating weight ranges from 30 g/m² to 275 g/m². A 120 g/m² substrate is sufficient for general environments, while areas with moderate pollution or above, or coastal regions, typically use a substrate ≥150 g/m².

Aluminized Zinc (AluZinc) Substrate

Aluminized Zinc Silicon Steel Sheet is a steel sheet hot-dip coated with an alloy of aluminum (Al 55%), zinc (Zn 43.5%), and silicon (Si 1.5%). It features a smooth surface and offers superior corrosion resistance and heat resistance/oxidation resistance compared to galvanized steel. It possesses excellent paintability and good formability. The double-side coating weight ranges from 30 g/m² to 180 g/m². A 100 g/m² substrate is used for general environments, while areas with moderate pollution or above, coastal regions, or industrial areas typically use a substrate ≥150 g/m².

Zinc-Aluminum-Magnesium Substrate

Xinghan Coating Zinc-Aluminum-Magnesium substrate, with aluminum (Al 6%) and magnesium (Mg 3%), enhances the crack resistance of the coating. It offers high corrosion resistance, high temperature resistance, and wear resistance, while also featuring self-healing properties at cut edges. Its corrosion resistance is 5-10 times that of ordinary galvanized steel sheets. It is used in environments requiring relatively high corrosion resistance performance.

Selection of Coating Weight for Color Coating

In most cases, galvalume (aluminum-zinc alloy coated) color-coated steel is used in relatively acidic environments, while galvanized (zinc coated) color-coated steel is employed in relatively alkaline environments. For use in environments with higher corrosion resistance requirements, such as severe industrial areas, coastal regions, and offshore areas, zinc-aluminum-magnesium color-coated steel is adopted.
The color coatings widely used in building envelope systems are primarily based on galvanized, galvalume, and zinc-aluminum-magnesium substrates. The corrosion resistance is directly proportional to the coating thickness.
Coating thickness primarily affects the cut-edge corrosion resistance of color-coated sheets. Cut-edge corrosion is an electrochemical process influenced by factors such as the pre-treatment layer, primer, substrate thickness, and coating thickness. Typically, the pre-treatment layer and primer are relatively constant. Therefore, cut-edge corrosion resistance is affected by the substrate thickness and coating thickness. Thinner substrates and thicker coatings result in better cut-edge corrosion resistance.

Selection of Substrate Thickness for Color Coating

The conventional thickness range for Xinghan color-coated substrates is 0.12 - 1.5 mm, tailored for both the Chinese and international markets. For the Chinese domestic market, national standards recommend the following minimum thicknesses:

Roofing External Sheet: ≥ 0.6 mm
Wall Cladding: ≥ 0.5 mm
Interior Lining Sheet: ≥ 0.4 mm

Quality Assurance and Comprehensive Services

Quality Assurance

Xinghan Coating promises that the color-coated products we manufacture comply with the national standard: GB/T 12754-2019.

The Customer Service Department annually formulates and implements the "Color-Coated Product Visit Plan," conducting regular visits to distributors and end-users to understand the application of our products, and identify any shortcomings in supply and service. We promptly make improvements to meet all your requirements.

Serving customers begins with responsibility and ends with trust. With a network of 20+ service centers nationwide and manual customer service at 400-666-9699, we regularly conduct user satisfaction surveys, promptly address deficiencies, and report the improvement process and results to customers in writing.