Copper chrome-light 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 must be protective treatment. However, regardless of passivation, light must first be processed. Formula of traditional light with high chromium liquid, which exists expensive, serious environmental pollution, sewage treatment complex, easy to clean parts and other defects. Without the chrome light liquid can overcome these shortcomings, widely used in non-chrome passivation copper and its alloys parts before the light treatment. 2. Main features: 2.1 light was no hexavalent chromium, bath simple, environmentally friendly and high efficiency. 2.2 can improve the surface finish of copper and its alloys, and lay the foundation for decorative passivated. 2.3 low-cost, low overall cost. 3. The main technical indicators: No Item Index 1 amount (%) 19 2 PH value of 0.5 to 1.5 3 Appearance colorless liquid 4 treatment temperature (℃) at room temperature 5 Processing time (min) 10 ~ 15 6 4. Use the impregnation process : degreasing → washing → etching → washing → No chromium Idemitsu → Drain → washing → washing → passivation → washing → distilled water → dry → drying (temperature: 60 ~ 70 ℃, time 20 ~ 25min) Note: If corrosion found water film is not continuous, repeat the degreasing process. 5. Preparation and Maintenance: 5.1 to join Idemitsu 10% of the total amount of bath water, then add sulfuric acid (1.84) 16%, while adding while stirring, phosphoric acid for 15 minutes (1.6) 24% acetic acid 30%, LH- 25 type Idemitsu agents 19%, stir, add a little water and stir evenly balance, measured PH value, meet the technical requirements can be produced. 5.2 When the PH value rises limit, in proportion to supplement ingredients. 5.3 When the product gloss decline, as appropriate, add a matting agent. 6. Storage: 25 kg plastic pail, should be small exhaust vent on the lid, it is a Grade A inorganic acid corrosive substance shall be cut off from heat and fire. The shelf life of six months.