Shandong Decho Building Materials Technology Co., Ltd
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40 Years Quality Z275 PPGI AZ165 PPGL Beckers Super HDP Pre Painted Galvanized Steel
Colour coated coil is a versatile product made from substrates like hot-dip galvanized sheet, hot-dip aluminium zinc plated sheet, and electro-galvanized sheet. The manufacturing process involves pre-treatment, including chemical degreasing and chemical conversion treatment, followed by coating one or several layers of organic paint. This paint is then baked and cured to achieve a durable and aesthetically pleasing finish. These coils are named colour coated coils due to the various colours of organic paint applied.
Using hot-dip galvanized steel strip as the substrate for colour coated steel strip provides a dual layer of protection. Besides the zinc layer, the organic coating adds an extra shield, enhancing rust prevention and extending the steel strip's service life by about 1.5 times compared to regular galvanized strips.
2. Introduction to Galvanized Color Coated Steel Coil and Aluzinc Color Coated Steel Coil
Colour coated steel coils come in two primary varieties: galvanized color coated steel coil and Aluzinc (aluminium-zinc) color coated steel coil. Both types offer unique advantages and are suited to different applications based on their properties.
Galvanized Color Coated Steel Coil
Description:
Galvanized color coated steel coil is produced by applying a layer of organic paint over hot-dip galvanized steel. The galvanized layer consists of a thin coating of zinc, which provides excellent corrosion resistance.
Advantages:
1. Corrosion Resistance: The zinc layer provides a protective barrier against rust and corrosion.
2. Aesthetic Appeal: Available in various colors and finishes, making it suitable for decorative applications.
3. Durability: The combination of zinc coating and paint enhances the durability and longevity of the steel.
4. Cost-Effective: Generally less expensive than Aluzinc coated steel, making it an economical choice for many applications.
5. Versatility: Suitable for a wide range of uses, including construction, automotive, and home appliances.
Disadvantages:
1. Lower Heat Resistance: The zinc coating may not perform as well under high-temperature conditions compared to Aluzinc.
2. Moderate Weather Resistance: While the galvanized layer offers good corrosion protection, it may not be as effective in harsh or highly corrosive environments compared to Aluzinc.
Aluzinc Color Coated Steel Coil
Description:
Aluzinc color coated steel coil is made by coating a steel substrate with an aluminium-zinc alloy, followed by an organic paint layer. The Aluzinc coating typically consists of 55% aluminium, 43.4% zinc, and 1.6% silicon.
Advantages:
1. Superior Corrosion Resistance: The aluminium content in the coating provides enhanced corrosion resistance, especially in harsh environments.
2. Heat Resistance: Better performance in high-temperature conditions due to the aluminium component.
3. Longer Service Life: The combined protective properties of aluminium and zinc result in a longer lifespan compared to regular galvanized steel.
4. Enhanced Reflectivity: The aluminium-zinc coating provides excellent reflectivity, making it suitable for roofing and siding applications where heat reflection is beneficial.
Disadvantages:
1. Higher Cost: Aluzinc coated steel is typically more expensive than galvanized steel, which may be a consideration for budget-sensitive projects.
2. Limited Color Variety: While it offers good aesthetics, the range of available colors and finishes may be more limited compared to galvanized color coated steel.
Comparison Summary
Galvanized Color Coated Steel Coil:
- Pros: Cost-effective, good corrosion resistance, wide color variety, versatile applications.
- Cons: Lower heat resistance, moderate weather resistance.
Aluzinc Color Coated Steel Coil:
- Pros: Superior corrosion resistance, excellent heat resistance, longer service life, enhanced reflectivity.
- Cons: Higher cost, limited color variety.
Conclusion
Both galvanized and Aluzinc color coated steel coils have their respective advantages and are suitable for different applications. The choice between the two depends on factors such as budget, environmental conditions, and specific performance requirements.
| Pre-Painted Galvalume Steel Coils | |||
| Commercial Quality Steel | ASTM A755M-03 | EN10327-2004 | JIS G 3322:2012 |
| CS | DX51D+AZ | CGLCC | |
| Structural Quality Steel | SS GRADE 230 | S220GD+AZ | CGLC340 |
| SS GRADE 255 | S250GD+AZ | CGLC400 | |
| SS GRADE 275 | S280GD+AZ | CGLC440 | |
| SS GRADE 340 | S320GD+AZ | CGLC490 | |
| SS GRADE 550 | S350GD+AZ | CGLC570 | |
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| S550GD+AZ |
| |
| Pre-Painted Galvanized Steel Coils | |||
| Commercial Quality Steel | ASTM A755M-03 | EN10327-2004 | JIS G 3312:2012 |
| CS | DX51D+Z | CGCC | |
| Structural Quality Steel | SS GRADE 230 | S220GD+Z | CGC340 |
| SS GRADE 255 | S250GD+Z | CGC400 | |
| SS GRADE 275 | S280GD+Z | CGC440 | |
| SS GRADE 340 | S320GD+Z | CGC490 | |
| SS GRADE 550 | S350GD+Z | CGC570 | |
|
| S550GD+Z |
| |
| SPECFICATION | |||
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| PRE-PAINTED GALVANIZED STEEL COIL | PRE-PAINTED ALUZINC STEEL COIL | |
| Thickness | 0.15MM--1.50MM(BMT) | 0.15MM--1.50MM(BMT) | |
| Width | 900MM-1340MM | 900MM-1340MM | |
| Zinc/AZ | 30g/m2-275g/m2 | 30g/m2-185g/m2 | |
| Base Metal | Galvanized Steel Coil | Galvalume/ Aluzinc Steel Coil | |
| Paint Coating System | POLYESTER(PE),RMP, SMP,Super-SMP, HDP,Super HDP, PVDF | ||
| Color | RAL / Customized | ||
| Coil weight | 1.5MT-10MT | ||
| Coil ID | 508MM OR 610MM | ||
| * HARD QUALITY GALVANIZED STEEL(HRB75-HRB90) AVAILABLE ON CUSTOMER'S REQUEST | |||
| Coating performance | |||||||
| CATEGORY | T Bending | Impacting | Salt spray test(hours) | MEK | Hardness | Gloss 60° | Color Tolerance ΔE |
| PE | ≤3T | ≥9 | ≥500 | ≥100 | ≥F | 10-85 | ≤0.8 |
| SMP | ≤3T | ≥9 | ≥500 | ≥100 | ≥F | 10-85 | ≤0.8 |
| HDP | ≤2T | ≥9 | ≥1000 | ≥100 | ≥HB | 10-85 | ≤0.8 |
| PVDF | ≤2T | ≥9 | ≥1000 | ≥100 | ≥HB | 10-85 | ≤0.8 |
Test Process & Results:
Paint Suppliers & Partners:
We only choose the top-level paint suppliers for our pre-painted steel coils and sheets,
AkzoNobel, Sherwin-Williams Valspar, Beckers, PPG Industries, Nippon, KCC are our solid paint suppliers.
Their best paint materials decide our steel coils quality.
Package & Delivery Shipment :
Delivery time: 30 days deliver to loading port
Shipment Methods: Container, Breakbulk, Railway, Trucks
Projects: