PPGI rust is another common issue which the end users often came across. This note will give 3 case study and 7 tips for how to prevent the rust of PPGI Coil.
Case 1-PPGI Rust
Coil production after 3 months to open the package to use, or install 6 months (PVDF), the surface of a large area of color changing and rust. After six months of use of the PPGI, the wall has been the accumulation of a large area of black dust which can be wiped by napkin. The wall appears white fingerprints and footprints which were left behind after the installation. White color is normal jade. Black ash on the wall was already stacked on the installation before. This is external factors, thus after washing, the white and rust can be removed.
Case 2-PPGI Rust
The installation of the roof after 2 months, a large number of floating rust particles; The roof has begun to rust more pull core aluminium anchor bolt; With a coin scraping, the rust points were exposed primer and galvanized layer which was not found rust point; Part of the roof covered in the processing of the film, the membrane also has more rust. With stripping the film, the exposed color coating did not find rust. It could be confirmed that there PPGI Coils are in line with factory standards. Rust point is due to external small metal particles adhere to the steel surface caused by corrosion slowly.
Case 3- PPGI Rust
The coil ends appear rusty. After opening the coil, it is found that the vertical packaging under the wooden bracket has been all damp. The coil after the wrapping paper overturned local damage at the damaged coil directly with the wet wooden bracket rust. When the coil is on the machine to open, it is found that the rust side is wrinkled, while the water droplets appear in the coil. It is recommended to add a bottom skirt to protect the bottom wrapping.
How to prevent PPGI Rust?
1 According to the use of the environment (corrosive atmosphere, temperature, sunlight), the end users must choose the right material. Ordinary polyester coating cannot be used in the chemical plant. Under alkaline media, the use of galvanized color plates should be cautious.
2 Try to make the incision in the hidden parts which is exposed to a variety of trimming to appropriate protection.
3 No water soaked and stored indoors to avoid open dumping.
4 Cutting&welding cannot be left on the surface of the metal chip. When the construction completed, thorough cleaning the surface of ppgi sheets by water. Under normal circumstances, the PPGI sheets need clean by a six-month. Seashore and industrial pollution area should be with more frequent cleaning.
5 The PPGI’s physical quality, such as coating problems: paint stripping, sticky paint, scratch resistance, wear, etc., need to be guaranteed by a third party (paint suppliers)
6 Some users of PPGI Coils are lack of knowledge in the selection of the material. The selection of PPGI Coils should be integrated into the price and processing performance (pressure type, coating), which may require appropriate advice or guidance
7 Part of the PPGI end users uncoiling and corrugated equipment is poor. If the PPGI is not improperly used, it is very easy to be happened quality claim during the processing.
