what material,color price is the best of Color coated steel coil,ppgi

For Color coated steel coil,ppgi,the competitive price is in boxing county,binzhou city,China, Color coated steel coil,ppgi volume of base material can choose manufacture or hot \ electric plating coating steel, although  Color coated steel coil,ppgi,iron coated steel vol part of organic coating has good corrosion resistance, but there is still a small gap in organic coating, air and water are likely to enter, in turn, may rust the base material, so with no coating substrate made of caitu vol, short service life,And after the scratch is easy to diffuse resulting in coating peeling.The base material of Color coated steel coil,ppgi,iron coated steel is galvanized steel or galvanized alloy steel.The production process of color coating is divided into substrate pretreatment, chemical conversion film (non-organic metal coating), organic non-metal coating, and some production lines have post-coating process.A, the substrate pretreatment as a substrate galvanized steel plate if not directly into a color coating process after production, it may appear in the transportation process of rust (white rust), dust, and other pollution.If these can not be removed, it will affect the quality of the color.The quality and all physical and chemical properties of the finished color coating roll are closely concerned with the pre-treatment.In addition, after galvanizing production, in order to prevent rust and oil, these oil should be removed before color coating production.The most commonly used pretreatment method is alkali solution degreasing.Two, the role of chemical conversion film has two, one is to further improve the anti-rust ability, the other is to improve the adhesion between the substrate and the coating, improve the substrate coating performance.Generally there are three steps: one is phosphating, forming a large number of crystals on the metal surface, and then using phosphorus salt solution to form a layer of phosphate film on the metal surface;The second is passivation closure, phosphate film still has some holes, with chromate and hole points to produce a chemical reaction, the formation of protective film.Three for pure water washing, with desalination or deionization of water to remove the passivating liquid.Three, organic coating organic coating is divided into primer and finish, primer requirements are not high, can be color smooth coating, but now the enterprise in order to produce safety, primer finish is generally color reverse coating.After coating process: after coating process printing, embossing, peelable protective film, lamination, etc., to increase the decorative and protective performance of color coated board.In addition, some foreign coating process and leveling and straightening in the cold rolling, galvanized production line used in the process.

Color coated steel coil,ppgi,iron coated steel