Color Coated Galvanized Steel Coil

Also known as PPGI, color coated galvanized steel coils are composite materials made of galvanized steel sheets as the base, coated with organic primer and paint. They provide corrosion resistance, decorative appeal, and good processing performance.

Thanks to their vibrant colors, protective coatings, environmentally friendly color options, and varying resistance to corrosion and weather conditions, PPGI coated coils are widely used in industries such as construction, transportation, home appliances, solar energy, and furniture. In the home appliance industry, color-coated steel sheets are especially popular for the door panels of refrigerators, air conditioners, and washing machines.

Product Specifications

Dimension Name		Value
Material		galvanized steel coil
Size	Thickness (mm)	0.12–1.5 (tolerance: ±0.01–0.03 mm)
	Width (mm)	600–1500 (standard: 1000/1200/1250 mm)
	Coil ID (mm)	508/610 (customizable)
	Coil Weight (tons)	3–15 (depending on thickness/width)
	Coating Side	Single-sided or Double-sided
Chemical Composition	C (Carbon)	≤0.15%
	Mn (Manganese)	≤0.60%
	P (Phosphorus)	≤0.035%
	S (Sulfur)	≤0.035%
	Si (Silicon)	≤0.03%
	Al (Aluminum)	0.01–0.07% (for grain refinement)
	Zn (Zinc Coating)	40–275 g/m² (Z40–Z275, equivalent to 5–35 μm)
Mechanical Properties	Yield Strength (MPa)	235–550 (depending on grade, e.g., SGCC: ≥235 MPa, DX51D: ≥260 MPa)
	Tensile Strength (MPa)	270–620 (e.g., SGCC: 270–500 MPa, DX51D: ≥300 MPa)
	Elongation (%)	18–40 (depending on thickness/grade)
	Hardness (HV)	50–90 (or HV 100–200)
	Bendability	180° bend test (d=0t, no cracking)
Surface Treatment	Pre-Treatment	Chemical Degreasing → Chromate Passivation (Cr³⁺ or Cr⁶⁺-free) → Dry
	Coating Type	Polyester (PE), Polyvinylidene Fluoride (PVDF), Silicone-Modified Polyester (SMP), Plastisol
	Coating Thickness (μm)	Top Coat: 15–25 μm; Back Coat: 5–10 μm (total: 20–35 μm)
	Surface Finish	Smooth, Matte, Embossed, or Wrinkle
	Color Options	RAL Color Chart (e.g., RAL 9010 White, RAL 9006 Silver, Custom Colors)
	Additional Features	Anti-fingerprint, Anti-static, Self-cleaning, Corrosion-Resistant Primer
Grade	Common Standards	ASTM A653, JIS G3312, EN 10346, GB/T 12754
	Typical Grades	SGCC (Commercial Quality), DX51D+Z (Drawing Quality), SGCD (Deep Drawing)
	Special Grades	HDP (High Durability Polyester), SMP (Silicone-Modified Polyester), PVDF

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Advantages

Corrosion Resistance: The galvanized layer and organic coating on the surface of color-coated galvanized steel coils create a physical barrier that offers dual protection, effectively blocking moisture, oxygen, and chemical corrosion.
Aesthetics: PPGI coated coils feature vibrant colors and offer a range of customized color options. Choices include smooth, matte, glossy, orange peel texture, or fingerprint-resistant surfaces, improving both visual appeal and tactile feel.
Lightweight and High Strength: Color-coated galvanized steel coils are lightweight, with a density only one-third that of aluminum, which reduces transportation and installation costs. This makes them suitable for high-rise buildings and large structures. The cold rolling and galvanizing processes increase the tensile strength of the coils while keeping good ductility.
Excellent Machinability: Color-coated galvanized steel coils are easy to form and support complex processing like deep drawing, stamping, and bending, making them ideal for automotive body shapes and other irregular parts.
Environmental Protection and Sustainability: PPGI coated coils are fully recyclable, minimizing resource use and carbon emissions, and meet LEED and green building assessment standards. High reflectivity coatings can lower a building’s air conditioning needs, supporting carbon neutrality goals.

Applications

Construction: The waterproof, anti-rust, and wind pressure resistance qualities of color-coated galvanized steel coils make them ideal for long-term exposure scenarios such as roofs, curtain walls, and sound barriers.
Automotive: The lightweight characteristic of color-coated galvanized steel coils can lower fuel consumption, while the stone impact-resistant coating safeguards the chassis, and the anti-UV coating helps prevent interior aging.
Home Appliances: The fingerprint-resistant coating on color-coated galvanized steel coils makes them easy to clean, and the food-grade coating complies with FDA standards, making them suitable for internal components of refrigerators, ovens, etc.
Energy: The salt spray-resistant coating on color-coated galvanized steel coils ensures the durability of offshore wind power equipment, and the high-reflectivity coating improves the efficiency of solar panels.

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Color Coated Galvanized Steel Coil