Difference Between PPGI and PPGL Sheets

PPGI (Prepainted Galvanized Steel) and PPGL (Prepainted Galvalume Steel) are steel sheets coated with a mixture of zinc and aluminum to prevent rusting, and are used for construction and automotive applications.

The main differences between the two are as follows:

1. Base metal: PPGI is made of galvanized steel, while PPGL is made of galvalume steel, which is aluminum-zinc alloy coated steel.

2. Corrosion resistance: PPGL has better corrosion resistance compared to PPGI because of its aluminum-zinc alloy coating.

3. Paint coating: PPGI is coated with organic paint, while PPGL is coated with a more durable and flexible paint system, called silicone-modified polyester.

4. Cost: PPGL is generally more expensive than PPGI due to its better corrosion resistance and the type of paint coating used.

5. Flexibility: PPGL is more flexible and can bend more easily without cracking compared to PPGI.

6. Appearance: PPGI has a uniform and glossy appearance, while PPGL has a matte and slightly grainy appearance.

7. Heat resistance: PPGL has better heat resistance compared to PPGI due to its aluminum-zinc alloy coating.

8. Durability: PPGL is more durable than PPGI due to its better corrosion resistance and flexible paint coating.

In conclusion, both PPGI and PPGL have their own advantages and disadvantages, and the choice between the two will depend on the specific requirements and conditions of the project. PPGL is better for projects that require higher durability and corrosion resistance, while PPGI is a good choice for projects that require a uniform and glossy appearance and lower cost.