Description

Prime Prepainted Galvalume Steel Coil is a composite material made by applying a surface coating (such as color coating or functional coating) to an aluminized zinc steel coil (typically 55% Al, 43.4% Zn, 1.6% Si). It combines the protective properties of the aluminized zinc layer with the decorative/functional advantages of the pre-coated film.

Features of Prime Prepainted Galvalume Steel Coil:

1. Excellent Corrosion Resistance: The aluminized zinc undercoat of Prime Prepainted Galvalume Steel Coil is protected by a dense oxide barrier of aluminum and cathodic electrochemical protection of zinc, resulting in corrosion resistance 2–6 times that of hot-dip galvanized steel coil (the time for red rust to appear in salt spray tests can be up to 18 times longer), making it particularly suitable for humid, industrial, or coastal environments.

2. High Heat Resistance: Prime Prepainted Galvalume Steel Coil can be used for extended periods at 315°C without discoloration or oxidation, and has a heat reflectivity >75% (approximately twice that of galvanized steel), providing significant energy-saving and heat-insulating effects.

3. Excellent processability and paintability: Pre-coated films (such as PVDF, PE, FEVE, etc.) require no on-site spraying, exhibiting strong adhesion, uniform color, and stable weather resistance; the substrate itself is easy to stamp, bend, and shear, and the coating and plating are firmly bonded.

4. Beautiful appearance and maintenance-free: The surface is silvery-white zinc spangle or has a uniform luster. Pre-coating allows for a rich variety of colors and textures (such as wood grain and stone grain), and offers stain resistance and self-cleaning properties.

5. Economical and efficient: Larger coating area per weight (due to the lower density of aluminum-zinc alloy compared to pure zinc), pre-coating reduces construction steps, and the overall lifespan can reach over 20 years, reducing total lifespan costs.

Applications of Prime Prepainted Galvalume Steel Coil:

Prime Prepainted Galvalume Steel Coil (i.e., color-coated coils with Galvalume Steel Coil as the substrate, often called PPGL steel coil or color-coated aluminum-zinc coated coils) is mainly used in the construction and light industrial sectors where high corrosion resistance, aesthetics, and construction efficiency are required. 1. Building Roofing and Walls: Prime Prepainted Galvalume Steel Coil is widely used as an exterior cladding material for industrial plants, warehouses, stadiums, commercial centers, and residential steel structures, offering excellent weather resistance, thermal insulation (high heat reflectivity), and colorfastness.

2. Building Decoration and Enclosures: Prime Prepainted Galvalume Steel Coil is used for partitions, ceilings, eaves, garage doors, sound barriers, etc. The pre-coated finish allows for immediate installation, shortening construction time.

3. Appliance and Electromechanical Housings: Used in manufacturing air conditioner outdoor unit housings, electrical cabinets, switch boxes, water heater housings, etc., leveraging its corrosion resistance and excellent coating adhesion.

4. Transportation and Agricultural Facilities: Prime Prepainted Galvalume Steel Coil is used for light truck bodies, guardrails, greenhouses, livestock sheds, etc., particularly suitable for coastal or high-humidity corrosive environments.

5. Photovoltaic Mounting Systems and Infrastructure: Some Prime Prepainted Galvalume Steel Coil is used for photovoltaic system frames or support structures (ensuring the coating is resistant to UV aging), as well as communication base stations, power distribution boxes, etc.

Pre-coating processes (roll-coating organic coatings such as polyester, fluorocarbon, or silicon-modified polyester) enhance the aesthetics and provide additional protection on aluminized zinc-plated substrates (55% Al-Zn-Si) without altering the core corrosion resistance mechanism of aluminized zinc (aluminum forms a dense oxide film). Its lifespan is typically 1.5–2 times that of bare aluminized zinc (depending on the coating type), and it avoids on-site coating contamination and unevenness issues. Note: If the substrate is “aluminized zinc-magnesium” (e.g., Zn-Al-Mg-Si), the end-face self-healing ability is stronger, but “pre-coated aluminized zinc” generally still refers to a standard 55% Al-Zn substrate with an organic coating.

Specifications of Color Coated Steel Coil:

NAME	PPGI	GALVANIZED	GALVALUME/ALUZINC
CERTIFICATE	ISO9001:2008
STANDARD	EN10142 JIS G3302 GB/T-12754-2006	ASTM A653 JIS G3302 SGCC/SGCH GB/T2518 European Standard	ASTM A792 JIS G3321 JIS G3317
GRADE	CGCC CGCH CGCD1-CGCD3 CGC340-CGC570 GRADE	SS GRADE33-80 SGCC SGCH SGCD1-SGCD3 SGC340-SGC570 SGCC DX51D	GRADE33-80 SGLCC SGLCD SGLCDD SGLC400-SGLC570 SZACC SZACH SZAC340R
MODEL NO	0.16MM-1.5MM*1250MM OR UNDER	(0.12-1.5)*1250MM OR UNDER	0.16MM-1.5MM*1250MM OR UNDER
TYPE	Steel coil Steel sheets/plates Corrugated steel sheets/plates	Steel coil Steel sheets/plates Corrugated steel sheets/plates	Steel coil Steel sheets/plates Corrugated steel sheets/plates
TECHNIQUE	Hot rolled-cold rolled -galvalume /galvanized -PPGI/PPGL	Hot rolled-cold rolled- galvanized	Hot rolled-cold rolled-galvalume /Aluzinc
SURFACE	Mini/regular/big/zero spangle,	Mini/regular/big/zero spangle,
TREATMENT	Chromate treatment /chromate-free treatment /untreated unoile/oiled, TENSION LEVELLERT SKIN PASS anti-fingerprint/un-anti-fingerprint, Coating,color	Chromate treatment /chromate-free treatment /untreated unoile/oiled, TENSION LEVELLERT SKIN PASS anti-fingerprint/un-anti-fingerprint, Coating
APPLICATION	Structural use ,roofing, commercial use, household appliance, industry, family
SPECIAL APPLICATION	Wear resistant steel, high- strength – steel plate

Prepainted galvanized steel coil(PPGI)
Standard	Grade	Zinc coating	Width	Thickness	Length	Capacity/year
JIS G3312	CGCC	Z40-Z275g	600- 1250	0.16-1.5	Coil	200,000Ton
EN10346	DX51D+AZ/DX53D+AZ/S220GD-550GD	Z40-Z275g	600- 1250	0.16-1.5	Coil	200,000Ton
ASTM A792	CS-B/SS255-550	Z40-Z275g	600- 1250	0.16-1.5	Coil	200,000Ton
Coil ID:508mm/610mm, Coil Weight: 3-8Ton, Top coating:12-25μm, back coating:5-15μm; RAL international color With/ Without PE film Smooth/Matt fini

Prepainted galvalume steel coil(PPGL)
Standard	Grade	Zinc coating	Width	Thickness	Length	Capacity/year
JIS G3312	CGLCC	Z40-Z275g	600- 1250	0.23-1.5	Coil	200,000Ton
EN10346	DX51D+AZ/DX53D+AZ/S220G-550GD	Z40-Z275g	600- 1250	0.23-1.5	Coil	200,000Ton
ASTM A755	CS-B/SS255-550	Z40-Z275g	600- 1250	0.23-1.5	Coil	200,000Ton
Coil ID:508mm/610mm, Coil Weight: 3-8Ton, Top coating:12-25μm, back coating:5-15μm; RAL international color With/ Without PE film Smooth/Matt fini

Standards and Classifications

Product Name	Prepainted Steel Coil,Color Coated Steel Coil,Printed Pattern Steel Coil,PPGI,PPGL
Standard	EN10147, EN10142, DIN 17162, JIS G3302, ASTM A653
Type	Coil/Sheet/Plate/Strip
Material	CGCC, SGCC, SGCH, G350, G450, G550, DX51D, DX52D, DX53D, TDC51DZM, TDC52D, TS350GD, TS550GD, DX51D+Z, Soft / Full hard, TDC51D+Z, TDC52D+Z, SPCC, SPGC
Thickness	0.12mm-1.2mm or 0.8mm/0.6mm/0.5mm/0.3mm/0.2mm
Width	600mm-1500mm or 914mm/1000mm/1200mm/1219mm/1220mm
Surface Color	RAL/Printed/Matte/Wrinkled/Embossed/Nano
Painting Coating	Top: 10 to 35 um (5 um + 12-20 um) Back: 7 +/- 2 um
Coating Types	PE/PVDF/HDP/SMP
Coil Weight	3 Tons -8 Tons
Coil ID	508mm/610mm