A color-coated surface skim a water adjustment (optional) a drying process a chemical conversion film is generally used a drying early shower / dipping process. In addition to the third step of the process by dipping, the rest are chemicals applied by spray method. After treatment generally contains chromium, by treatment only after removing excess surface residues web, but also to form a compound layer of chromium on the surface, to improve the corrosion resistance of the coil. When aluminum coil material application, a film weight 30 6 5 mg / m Z. Most of the post-treatment process also uses a chromium compound. After treatment chemicals to control the composition and operating conditions make the amount of chromium conversion coatings containing uniform. Theodolite target board to identify by standard horizontal, vertical centerline color plate offer base and pull wire baseline, which is also unwinding, coiler device horizontal, vertical centerline. Separation is the physical treatment, is separated by physical action to recover the state of pollutants (oil film and oil droplets) method of suspending insoluble in water, it can be divided into gravity separation, centrifugal separation and sieving interception method. Activated Carbon Adsorption is the physical chemical treatment. Adsorption is an interfacial phenomena, which play a role in both phases of the interface, for example, activated carbon and water contacted silver color steel, wastewater contaminants will be transferred from the water to the surface of activated carbon, which is activated carbon adsorption . Because Shandong caitu manufacturers mostly private enterprises, but in recent years due to the low initial investment prepainted steel gray color, is also increasing its capacity is surplus? Under normal demand or expansion? 2012 total production reached 7.773 million tons painted color steel, up 24.9 percent compared with 2011, but lower than the total capacity is still large compared to the gap, accounting for 20.24 percent of total capacity, according to our statistics, the largest production capacity in east China The average capacity utilization rate is between 30% -35%, the rest due to capacity is small, so its efficiency is relatively high. In terms of the domestic color coated coil already certain research and development. Wuhan, southwest aluminum processing plants have a certain scale of production units. In order to reduce the use of chromium in the industry, we have recently developed a process for the pretreatment for aluminum coil and outlet sections of some painted with vertical and horizontal shear unit features that make color coated steel products directly or through sub-section Length cut into the finished packaging process. (1) used in steel, zinc coating on aluminum phosphide and technology; (2) a complex process zinc oxide layer; (3) the process for chromated aluminum and aluminum-zinc alloy layer; (4 ) phosphating process is used on aluminum chromate; (5) the process for non-chromate on aluminum. Color plate Quote | Siping color steel | Steel Jinhong Run by Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry. Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry (www.bxjhr.com) (www.bxjhr.com) strong, credible, in Shandong Binzhou sheet (with) wood industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinhong Run steel and you hand into the brilliant, for a better future!