1. Process characteristics: product complies with EU "ROHS", "WEEE" Directive stipulates that meet environmental requirements. Trivalent chromium passivation for the production of aluminum, the aluminum including aluminum, aluminum alloy and aluminum die castings; corrosion ability, performance is better than hexavalent chromium passivation process, the neutral salt spray can reach more than 360 hours ; forming a transparent passivation, light color coating is determined by the specific color purity aluminum; coating temperature is better, in 100 ℃ high temperature corrosion resistance without reducing its capabilities; high concentration of film consumption low volume; can be used for aluminum paint, powder coating and pre-treatment on the plastic processing; immersion, spray, hand-wipe process are easy to operate. 2. The aluminum coating agent composition and operating conditions: aluminum coating composition and process conditions spray impregnated RC-650 125 ml / liter 100 ml / liter temperature 35-42 ℃ 35-42 ℃ PH value 3.8-4.0 3.8-4.0 times 2- 5 minutes 2-5 minutes Miss Liu: 0757-81796851 QQ: 3057891720 Website: http: //www.fsrchg.com/