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PPGI (Pre-painted Galvanized Iron) and PPGL (Pre-painted Galvalume Steel) are types of steel sheets that are coated with a layer of paint after they have been galvanized (for PPGI) or coated with aluminum-zinc alloy (for PPGL). These pre-painted sheets combine the benefits of corrosion resistance, aesthetic appeal, and durability, making them an ideal choice for various applications, including construction, roofing, and manufacturing. With excellent performance in both indoor and outdoor environments, PPGI/PPGL sheets offer a cost-effective and versatile solution for a wide range of industries.

PPGI/PPGL Overview

PPGI (Pre-painted Galvanized Iron) and PPGL (Pre-painted Galvalume Steel) are types of steel sheets that are coated with a layer of paint after they have been galvanized (for PPGI) or coated with aluminum-zinc alloy (for PPGL). These pre-painted sheets combine the benefits of corrosion resistance, aesthetic appeal, and durability, making them an ideal choice for various applications, including construction, roofing, and manufacturing. With excellent performance in both indoor and outdoor environments, PPGI/PPGL sheets offer a cost-effective and versatile solution for a wide range of industries.

Key Features of PPGI/PPGL

  • Superior Corrosion Resistance: Both PPGI and PPGL have an excellent protective layer of either zinc or aluminum-zinc coating, which prevents corrosion and extends the lifespan of the sheets. The pre-painted surface adds further protection against harsh weather conditions.
  • Aesthetic Flexibility: PPGI/PPGL sheets are available in a variety of colors, finishes (e.g., glossy, matte, or satin), and textures, making them suitable for various architectural designs, home appliances, and other decorative applications.
  • Enhanced Durability: The combination of metallic coatings and paint makes these sheets highly resistant to rust, UV rays, and other environmental factors, ensuring their long-lasting performance.
  • Lightweight yet Strong: Despite their lightweight nature, PPGI/PPGL sheets offer excellent strength and are capable of withstanding considerable mechanical stress and pressure.
  • Environmentally Friendly: The coating and painting processes used in the production of PPGI/PPGL are designed to be eco-friendly, reducing the impact on the environment.

Technical Specifications of PPGI/PPGL

ItemParameter
MaterialSPCC, SGCC, Al-Zn, etc.
Coating TypeZinc (for PPGI), Aluminum-Zinc (for PPGL)
Coating Thickness30 g/m² - 275 g/m²
Paint Coating Thickness15 μm - 30 μm
Width600 mm - 1500 mm or Custom
Thickness0.3 mm - 1.2 mm or Custom
Tensile Strength≥ 270 MPa
Yield Strength≥ 235 MPa
Elongation≥ 25%
HardnessHRB 60 - 90
Surface FinishGlossy, Matte, Satin, etc.
Corrosion ResistanceExcellent, Suitable for Most Environments
UV ResistanceExcellent, Does not fade easily
Color OptionsCustom colors available

Advantages of PPGI/PPGL

  • Enhanced Corrosion Resistance: PPGI sheets (with a zinc coating) and PPGL sheets (with an aluminum-zinc coating) both provide excellent protection against corrosion, making them ideal for outdoor applications such as roofing, wall cladding, and facades.
  • Aesthetic Appeal: Available in a wide range of colors, finishes, and textures, PPGI/PPGL sheets are suitable for various design and architectural applications. Custom colors are available to meet specific design requirements.
  • UV and Weather Resistance: The paint layer on PPGI/PPGL sheets provides effective protection against UV rays, preventing fading and discoloration. This ensures that the sheets maintain their visual appeal and durability even in harsh weather conditions.
  • Low Maintenance: Pre-painted coatings on PPGI/PPGL sheets require minimal maintenance compared to untreated steel, making them a cost-effective solution for long-term use.
  • Lightweight yet Strong: The combination of the metallic coating and paint provides the sheets with strength while maintaining a lightweight profile. This makes them ideal for use in applications where weight is a concern.

Common Applications of PPGI/PPGL

  • Construction Industry: PPGI/PPGL sheets are widely used in roofing, wall cladding, facades, and ceiling panels due to their durability, aesthetic appeal, and resistance to environmental factors.
  • Home Appliances: Used in the manufacturing of refrigerators, washing machines, air conditioners, and other household appliances, where both functionality and appearance are important.
  • Automotive Industry: These sheets are also used for automotive body panels, as they offer corrosion resistance, aesthetic finishes, and durability.
  • Electrical Equipment: PPGI/PPGL sheets are commonly used in electrical equipment enclosures, cabinets, and other components requiring corrosion resistance and a clean appearance.

Frequently Asked Questions (FAQ)

1. What is the difference between PPGI and PPGL?
The primary difference is the metallic coating: PPGI is made from galvanized steel (zinc-coated), while PPGL is made from aluminum-zinc-coated steel (Galvalume). Both coatings provide excellent corrosion resistance, but PPGL offers superior performance in high-temperature environments due to the aluminum content.

2. How long do PPGI/PPGL sheets last?
The lifespan of PPGI/PPGL sheets depends on factors like the coating thickness, environmental conditions, and maintenance. Typically, these sheets can last 20-30 years or more, particularly in non-corrosive environments.

3. Can PPGI/PPGL sheets be used in extreme weather conditions?
Yes, PPGI/PPGL sheets are designed to perform well in various environmental conditions, including coastal areas with high humidity, as well as areas with extreme temperatures. The zinc or aluminum-zinc coating, combined with the paint layer, offers excellent protection against corrosion and UV degradation.

4. Are custom colors available for PPGI/PPGL sheets?
Yes, PPGI/PPGL sheets can be produced in a wide range of standard colors, and custom colors are also available upon request to match specific design requirements.

5. Are PPGI/PPGL sheets easy to process?
Yes, PPGI/PPGL sheets can be easily cut, bent, and formed without damaging the protective coating. They are highly versatile and can be used in a variety of fabrication processes.


PPGI and PPGL sheets offer a perfect blend of strength, corrosion resistance, aesthetic appeal, and durability, making them ideal for use in the construction, automotive, home appliance, and electrical industries. With excellent performance in both outdoor and indoor environments, these sheets are a cost-effective and long-lasting solution for various applications. For custom orders or further information, feel free to contact us.







Q: Are You Manufacture or Trade Company?

A: We are the professional manufacturer of steel products located in China. Welcome to contact us and visit our factory before you place orders.

Q: How do you guarantee the quality?

A: We are the professional manufacturer of steel products located in China. Welcome to contact us and visit our factory before you place orders.

Q: Can I get free samples?

A: Of course you can. We can produce according to your samples or technical drawings. Contact us by whatsapp or email to get free samples and you will get the sample after 3-7 working days.

Q: What is the MOQ? 

A: If you are scheduling to place a small quantity order or trial order, feel free to contact us, we can meet your requirements.

Q: Can you OEM or ODM?

A: Yes, we have a strong developing team. The products can be made according to your request.

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