Chengdu Branch-copper pieces passivation agent

1. Application: Copper and its alloys have good physical properties, but unstable in the air, especially in air containing corrosive media can easily be corroded. In order to improve its protection and decorative it must be passivated. It is widely used in electrical, instrumentation, electronics and household hardware surface protection treatment of copper parts. Traditional high chromium passivation solution exists high prices, pollution, sewage treatment complex parts easy to clean defects without chromium passivation solution can be customer above drawbacks, copper and its alloys are widely used in parts of passivation deal with. 2. Main features: 2.1 hexavalent chromium (Cr6 +), use conditions, and environmental benefits is high; 2.2 generates a transparent and dense passive film on copper and its alloys, can prevent discoloration of the substrate in the atmosphere and corrosion ; 2.3 with less, comprehensive and low cost. 3. The amount of the major technical indicators Item Index (%) 2 PH value 6-7 Appearance yellow liquid treatment temperature (℃) 60 ~ 70 treatment time (min) 23 4. Use dipping Process: degreasing → washing → etching → washing → chrome-free light → Drain → washing → passivation → washing → distilled water → dry → drying (temperature: 60 ~ 70 ℃ Time: 20 ~ 30min) Note: If corrosion was found after a water film is not continuous, repeat degreasing processes. 5. Preparation and Maintenance: 5.1 chrome-free passivation solution preparation: to join about 1/2 of the total volume of water, good measure LH-27B passivation liquid concentrate is added and stir, add a little water balance measured PH value, meet the technical requirements can be produced. 6. Packing and storage: 25kg plastic drum, stored in a cool dry place.