PE Prepainted Color Steel Coil with Chromic Acid Surface Treatment and 508/610mm Coil ID for Roofing and Wall Panels

1. Product Overview

PE prepainted color steel coil is widely used in roofing sheets, wall cladding, garage doors, and appliance panels where both surface finish and corrosion protection are required. Compared with unpainted sheet, the painted surface provides a more uniform appearance and adds an extra barrier layer over the metal substrate.

For this type of product, the main technical factors are coating system, paint thickness, width, and forming performance. A coil ID of 508 mm or 610 mm is commonly used for decoiling and roll forming lines, which makes this material suitable for continuous sheet processing.

2. Technical Solution

Product performance is based on:

• Coated steel substrate providing the base protective layer
• PE top coating adding a paint barrier for general service environments
• Chromic acid surface treatment helping improve surface stability before painting or further use
• Controlled top and back paint thickness for visible surface and backside coverage
• Mechanical properties matched to bending, roll forming, and panel fabrication

For common construction panels, PE coating is usually selected where standard outdoor performance and cost control need to be balanced. Paint coating thickness of top 10–25 μm and back 5–15 μm supports practical use in roll formed sheets and visible panels.

3. Specifications

4. Application

• Roofing sheets and roof trims
• Wall cladding and facade panels
• Garage doors and shutter panels
• Ceiling and decorative sheet parts
• White goods and appliance housings
• General construction and light industrial panels

5. Processing

• Cut-to-length sheet production
• Slitting into narrower strips
• Roll forming for roof and wall profiles
• Bending and folding
• Panel pressing and edge forming
• On-site installation after screw fixing or concealed fastening design

6. Advantages

• PE coating is suitable for general construction and panel applications
• Chromic acid surface treatment supports surface stability in processing and storage
• 700–1250 mm width range fits common panel and roll forming lines
• Top coating up to 25 μm improves visible surface coverage
• 508 mm and 610 mm coil IDs are compatible with standard industrial equipment
• Mechanical properties support common forming and fabrication operations

7. How to Choose

• General roofing and wall panels → PE coating is commonly selected
• Higher weather exposure → SMP, HDP, or PVDF may be considered
• Higher appearance requirement → choose top coating closer to 20–25 μm
• More rigid panel design → thicker sheet such as 0.8–1.2 mm is commonly used
• Continuous roll forming line → confirm width, coil ID, and coil weight before order

8. FAQ

Q1: What does PE coating mean in prepainted steel coil?
PE refers to polyester coating, which is commonly used for standard roofing, wall panel, and general construction applications.

Q2: Why are 508 mm and 610 mm coil IDs important?
These are common coil sizes for industrial decoiling and roll forming equipment, so they improve compatibility with standard production lines.

Q3: Is chromic acid surface treatment the same as the paint coating?
No. Surface treatment and paint coating are different steps. Surface treatment helps prepare and stabilize the sheet surface, while the paint coating provides the finished protective and decorative layer.

Q4: Is 1.2 mm suitable for roll formed panels?
Yes. Thicker gauges such as 1.2 mm are commonly used when higher rigidity is needed in formed panels or structural-facing sheet parts.

Q5: Can this coil be used for both roofing and appliance panels?
Yes. It is commonly processed into roofing sheets, wall panels, garage doors, and white goods housings depending on thickness, coating, and color selection.