Speaking of the application of PPGI Steel Coil can be said to be very extensive, but the color coated coil will have quality problems for some reasons during processing.
1.The hardness of the PPGI Steel Coil is poor (pencil hardness): use a drawing pencil to force a layer on the surface of the coating, and wipe off the back surface to leave a scratch. Causes: 1, the furnace temperature is low, the coating is not cured enough. 2. The heating conditions are not appropriate. 3. The thickness of the coating is thicker than specified.
2.The PPGI Steel Coil appears pitting: foreign matter or dust mixed from the outside after painting, part or all of the surface, there is a grain-like protrusion. Causes: 1. The paint is mixed with paint of other types or other companies. 2. In the paint, foreign matter is mixed in. 3. Poor water washing during pre-treatment.
3. there are bubbles in the edge of the color coating: there are paints on both sides, and after drying, bubbles appear. Cause: There are many burrs on the raw materials, and there are gaps on both sides.
Color coated products are general plate products that have been widely used in recent years. I don’t know how much you know about this product. Let's take a brief look at it by our staff. I hope to help you.
The PPGI steel coil is made of hot-dip galvanized sheet, hot-dip aluminum-zinc plate, electro-galvanized sheet, etc., and after surface pretreatment (chemical degreasing and chemical conversion treatment), one or several layers of organic coating are applied on the outside, followed by A product that has been baked and cured. It is also named for the color coated steel coil of organic paint coated with various colors, which is referred to as color coated coil.
In addition to the protection of the zinc layer, the PPGI steel coil using the hot-dip galvanized steel strip is coated with a zinc layer to protect the steel strip from rust and the service life is longer than that of the galvanized strip. Long, about 1.5 times. For the content of the color coated products, you can easily explain here. If you want to know more exciting information, please feel free to check our website updates.
