Galvanized color steel coil

Galvanized color steel coil (also known as pre-painted galvanized steel coil or PPGI) is a color-coated steel sheet made from hot-dip galvanized steel coil (or electro-galvanized steel coil) as the substrate. After surface pretreatment (degreasing, phosphating, etc.), one or more layers of organic coating (such as polyester PE, high weather-resistant HDP, fluorocarbon PVDF, etc.) are roll-coated, and then baked and cured.

Advantages of galvanized color steel coils

• Excellent Corrosion Resistance

The galvanized layer forms a protective barrier, providing sacrificial anodic protection to the steel substrate even with minor surface scratches.

Fe→Fe²⁺ + 2e⁻, Zn→Zn²⁺ + 2e⁻

The colored coating further isolates the steel from air, moisture, and corrosive media, thus its corrosion resistance is generally significantly superior to ordinary steel plates.

             （High-quality galvanized color steel coil raw materials）

• Good Aesthetics

Rich in colors, various colors can be customized.

Smooth and glossy surface.

Suitable for different design needs in industrial plants, commercial buildings, and residences.

• Long Service Life

Under normal conditions:

Ordinary galvanized sheets have a service life of 10-20 years or more; High-quality color-coated galvanized steel coils can have a service life of 15-30 years or even longer (depending on the zinc coating amount, coating type, and usage environment).

• Lightweight and High Strength

Compared to building materials such as brick walls and concrete:

Lighter weight; Easier to transport and install; Reduces structural load on buildings.

• Excellent Processing Performance

Suitable for:Bending, stamping, profiling, cutting, and welding (process requirements must be considered).Suitable for producing roofing panels, wall panels, sandwich panels, and other products.

Customized Cases

• We can apply a PVC protective film to the surface according to your needs. This is called coated color steel sheet, which protects the delicate paint surface of the color steel sheet during processing.

  

• We can emboss patterns onto the smooth surface of galvanized color steel sheets according to your needs. This is called embossed color steel sheet, and it comes in diamond and orange peel shapes. We can also customize it to your specific shape.

Why Choose JXL STEEL

• Superior Materials – We use premium galvanized steel sheets with a durable coating to ensure a long service life.
• Customization Options – We offer a variety of colors, thicknesses, and coating types to meet your project needs.
• Strict Quality Control – Each roll of steel undergoes comprehensive testing (coating, adhesion, corrosion, mechanical properties).
• Competitive Pricing – Excellent value for money without compromising quality.
• On-Time Delivery – An efficient production and logistics system ensures timely delivery.
• Technical Support – We provide professional guidance on product selection, installation, and maintenance.

                                    (JXL Steel production line)

Quality Inspection

• We first conduct a visual inspection to ensure the galvanized color steel coils are free of defects, facilitating subsequent processing and aesthetic use.
• Coating Performance Testing: We use a magnetic thickness gauge or coating thickness gauge to test the paint film thickness, ensuring it meets the customer's required thickness. JXL STEEL can produce paint films with a thickness of 25 microns on both the front and back sides. After testing, we sequentially conduct adhesion, bending performance, hardness, and impact resistance tests to ensure the paint does not crack or peel during customer use, and the product is fully qualified.
• Corrosion Resistance Testing: We will conduct salt spray tests to ensure that the color remains vibrant even in harsh operating environments.
• Substrate Mechanical Property Testing

  Project	Method	Common requirements
  Yield strength	tensile test	190~350 MPa
  Tensive strength	tensile test	270~450 MPa
  Elongation	tensile test	≥20%
  Bending performance	bending test	Bending diameter as specified by thickness
  Stamping performance	stamping test	No cracks

  （The data table above is taken from the test data of the DX51D grade. If you have any special requirements, please contact us.）

  

  

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  We have set up a sun exposure testing ground outside our factory, where some samples have been stored for over 10 years, yet they still look brand new and have vibrant colors.
• A third party is conducting an independent inspection of our products.

Export Cases

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• We receive a large number of foreign visitors every day, and they all give high praise and recognition to the color steel coils produced by our company.

Shipping site

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• Whether you choose container shipping or bulk cargo shipping, JXL STEEL guarantees that the products delivered to your factory will be intact and undamaged.