What Is PPGL Sheet?

PPGL stands for pre-painted galvalume steel, which is a kind of color-coated steel with GL as substrate. It combines the strength of steel with excellent anti-corrosion of Zn-Al coating. The galvalume coating is made of 55% aluminum, 43.4% zinc, and 1.6% silicon. Except for their excellent corrosion resistance, PPGL sheets also have high thermal reflectivity, which makes them heat-resisting. Let’s review more details.

Structure of PPGL Sheet

From top to bottom, it consists of the top coating layer, primer coating, pre-treatment coating, Al -Zn coating, base metal, Al-Zn coating, pre-treatment coating, primer coating, and top coating.

The base metal is the most inner part, which often uses cold rolled steel, which is covered with Al-Zn coating. This is the GL sheet.

Then PG sheets will be cleaned and degreased to form a layer of passivated metal chromate on the surface, which makes it easy to paint.

A primer is a preparatory coating on materials to ensure better adhesion and also provide additional protection. While the finish coat makes the surface smooth and good-looking. Generally, the top coating is thicker than the back coating. Here is a picture for your reference.

PPGL Sheet Production Process

It is very similar to the manufacturing process of PPGI. It starts from uncoiling, welding, pretreatment, primer painting, baking, cooling, twice-painting, baking and cooling again, quality control, and coiling for sale.

The substrate sheet first goes through a pre-treatment system for smoothing, cleaning, and degreasing. After that, a chemical conversion coating layer is formed. Then it will go through the coil coating process to be painted. The most commonly used method is double-sided and double-painted, which means both sides are painted twice. For special uses, it can be painted less or more. Then you will get PPGL coils for sale. And you can profile or shear the coils into sheets on the basis of your requirements. Below is a profiling video for you. You can follow Wanzhi Youtube Channel for more videos.

Advantages of PPGL Sheet

1. Excellent corrosion and weather resistance

Due to the galvanized layer and organic coating on the surface of the PPGL steel plate, it has excellent corrosion resistance and weather resistance, and can maintain long-term stability and service life in harsh environments.

2. Good heat resistance

The galvanized layer remains stable at high temperatures, so the PPGL board has good heat resistance and is suitable for use in high temperature environments.

3. Good decorative properties

PPGL boards are available in rich colors and can be customized with patterns to meet different aesthetic and functional needs.

4. Easy to process and form

PPGL board has good processing performance and forming performance. It can be sheared, bent, pressed, punched, welded, etc. as needed to meet the needs of various complex shapes.

5. High hardness and strength

The addition of the aluminum-zinc alloy layer significantly increases the hardness and strength of the steel plate, allowing it to withstand greater external impact and load, and resist wear and tear on the steel surface.

6. Environmental protection and energy saving

The organic coating used in PPGL boards does not contain harmful substances and meets environmental protection requirements.At the same time, because PPGL boards can be recycled, environmental pollution and energy consumption can be reduced.

Applications of PPGL Sheets

PPGL sheets are extensively used in construction, automobile, home appliances, etc.

Architectural field

• Roof and wall: PPGL sheets is often used as roof and wall materials of buildings due to its good corrosion resistance, heat resistance and decorative properties.
• Partition and ceiling: PPGL sheets as indoor partition and ceiling material not only has beautiful decorative effect, but also provides sound insulation, heat insulation and other functions.
• Building materials: PPGL sheets can be used to make doors and windows, awnings, sunshades, temporary houses, granaries, greenhouses, etc.

Automotive field

• Body parts: PPGL steel sheet can be used to make car body parts, such as doors, roofs, trunk lids, etc.
• Interior decoration parts: PPGL sheets can also be used to make car interior decoration parts, such as dashboards, door panels, fuel tanks, truck boxes, etc.

Home appliance field

In the field of home appliances, PPGL sheets is mainly used to make the outer shell and internal parts of home appliances.

For example: the outer shell and internal parts of home appliances such as refrigerators, gas stoves, air conditioners, microwave ovens, backlights, electric control cabinets, heat exchangers, dryers, etc.

Traffic facilities

In the field of transportation, PPGL steel sheets can be used to make highway guardrails, bridge guardrails and other transportation facilities to ensure traffic safety.

Conclusion

Pre-painted galvalume steel combines utility with beauty. Compared to PPGI steel, it is more resistant to corrosion, high temperature, and weather. Also, its surface smoother, which means it is more suitable for decorative or delicate uses. Its service life is about 3-6 times longer than that of PPGI. More than that, it can be punched, cut, profiled, or in any way possible to meet different requirements. If you are interested, please contact us for more information.

Wanzhi Steel has a galvalume steel production line and 2 color-coated steel production lines, which can produce PPGL steel of various specifications, different patterns and colors. It has passed ISO 9001:2015 certification. The products are well received by customers. If you have purchasing needs, feel free to contact us at any time. You are welcome to contact us.