In some foreign sources, and has proposed a durable life of color-coated film refers to severe hardening, chalking previous time, meaning within the specified number of years does not crack, not falling. Thus, different types of paint production of color-coated, its life is also different. According to Baosteel data reported in various types of paint (urban environment) using the same conditions, the service life is shown in Table 4-8-11. According to the British Imperial Chemical Industries (ICI) coil coatings product information on Boxing color plates, the life expectancy of its typical products are shown in Table 4-8-12. Also, according to data reported for outdoor use because of color coated color steel manufacturer, pollution and climate change by erosion, when the organic coating may cause long-term sun exposure were hardened and chalking, due to moisture and to the bulge and loose hole eventually becoming lost when the coating protective effect 金宏润 color plates, maintenance treatment needs to be re-painted. In the time before this deal as a concept of life is life. According to this concept, foreign to today's level of development of the paint that is possible to determine the coating color coated in some heavily polluted climate of a lifetime of 20 years, the rural areas of 30 to 40 years. Color coating production, mainly from the production of waste water pipeline section and coil Coil surface preparation. Its governance flow chart: chromium-containing wastewater (including wash water) → reduction treatment serum neutralization treatment → → → sedimentation skimmed wastewater discharge (including wash water) → → buried waste water separator 42, color coated production process containing Cr6 + wastewater treatment program? Wastewater containing Cr6 +, while its reduction treatment, reducing the amount of which is calculated Cr6 + content (g / m3) = Cr6 + titration points × 0.1733g / m3 reducing the amount (kg) = Cr6 + content × × bath volume ratio coefficient which is the ratio coefficient: 3.7 sulfite; sodium bisulfite 3; ferrous sulfate 8.8 Incorporation: derived by calculating the amount of reducing agent, appropriate to add some more. 43, color coated production skim wastewater treatment options? Skimmed wastewater must be oil-water separation, and its methods are: ① acidification method: using hydrochloric acid or sulfuric acid as a separating agent, the pH was adjusted to 2.0 Boxing color plates, Huaiyin color steel, steel Jinhong Run by Boxing Xingfu Town Jinhong Run Steel Industry and Trade Ministry. Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry (www.bxjhr.com) (www.bxjhr.com) strong, credible, Shandong Binzhou board (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! You can also access (www.bxjhr.com/supply_details_47251130.html), for more information about the company.